VARIABLE ANNUITY ACCOUNT FOUR
485BPOS, 1999-12-29
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<PAGE>   1
                                                              File Nos. 33-86642
                                                                        811-8874

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-4
                   REGISTRATION STATEMENT UNDER THE SECURITIES
                                  ACT OF 1933                  [ ]

                          Pre-Effective Amendment No.          [ ]

                     Post-Effective Amendment No. 7            [X]



                                     and/or

                  REGISTRATION STATEMENT UNDER THE INVESTMENT
                              COMPANY ACT OF 1940              [X]


                                 Amendment No. 8


                        (Check appropriate box or boxes)

                          VARIABLE ANNUITY ACCOUNT FOUR
                           (Exact Name of Registrant)

                     Anchor National Life Insurance Company
                               (Name of Depositor)

                               1 SunAmerica Center
                       Los Angeles, California 90067-6022
              (Address of Depositor's Principal Offices) (Zip Code)

                Depositor's Telephone Number, including Area Code
                                 (310) 772-6000

                              Susan L. Harris, Esq.
                     Anchor National Life Insurance Company
                               1 SunAmerica Center
                       Los Angeles, California 90067-6022
                     (Name and Address of Agent for Service)

Title and Amount
of Securities
Being Registered
- ----------------
Flexible Payment
Deferred Annuity
Contracts


It is proposed that this filing will become effective:

         [X]  immediately upon filing pursuant to paragraph (b) of Rule 485
         [ ]  on January 29, 1999 pursuant to paragraph (b) of Rule 485
         [ ]  60 days after filing pursuant to paragraph (a) of Rule 485
         [ ]  on _________________ pursuant to paragraph (a) of Rule 485




<PAGE>   2


                          VARIABLE ANNUITY ACCOUNT FOUR


                             CROSS REFERENCE SHEET

                              PART A - PROSPECTUS




Incorporated by reference to Post-Effective Amendments 6 and 7 to this
Registration Statement (File Nos.: 33-86642 and 811-8874) as filed with the
Commission on January 29, 1999.


<PAGE>   3
                  PART B - STATEMENT OF ADDITIONAL INFORMATION


Incorporated by reference to Post-Effective Amendments 6 and 7 to this
Registration Statement (File Nos.: 33-86642 and 811-8874) as filed with the
Commission on January 29, 1999.



                                     PART C

        Information required to be included in Part C is set forth under the
appropriate item, so numbered, in Part C of this Registration Statement.


<PAGE>   4




                             [ANCHOR ADVISOR LOGO]


                                    PROFILE


                                January 29, 1999



Incorporated by reference to Post-Effective Amendments 6 and 7 to this
Registration Statement (File Nos.: 33-86642 and 811-8874) as filed with the
Commission on January 29, 1999.

<PAGE>   5

                             [ANCHOR ADVISOR LOGO]

                                   PROSPECTUS
                                JANUARY 29, 1999




Incorporated by reference to Post-Effective Amendments 6 and 7 to this
Registration Statement (File Nos.: 33-86642 and 811-8874) as filed with the
Commission on January 29, 1999.

<PAGE>   6



                       STATEMENT OF ADDITIONAL INFORMATION


                        FIXED AND VARIABLE GROUP DEFERRED
                           ANNUITY CONTRACTS ISSUED BY



                          VARIABLE ANNUITY ACCOUNT FOUR



                DEPOSITOR: ANCHOR NATIONAL LIFE INSURANCE COMPANY



This Statement of Additional Information is not a prospectus; it should be read
with the prospectus relating to the annuity contracts described above, a copy of
which may be obtained without charge by written request addressed to:


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
                             ANNUITY SERVICE CENTER
                                 P.O. BOX 54299
                       LOS ANGELES, CALIFORNIA 90054-0299




            THE DATE OF THIS STATEMENT OF ADDITIONAL INFORMATION IS
                               DECEMBER 29, 1999



<PAGE>   7
                                TABLE OF CONTENTS

<TABLE>
                                                                              PAGE
                                                                              ----
<S>                                                                           <C>
Separate Account............................................................    3

General Account.............................................................    4

Performance Data ...........................................................    4

Income Payments.............................................................    8

Annuity Unit Values.........................................................    8

Taxes.......................................................................   11

Distribution of Contracts...................................................   16

Financial Statements........................................................   16
</TABLE>

<PAGE>   8
                                SEPARATE ACCOUNT

      Variable Annuity Account Four was originally established by Anchor
National Life Insurance Company (the "Company") on November 8, 1994, pursuant to
the provisions of California law, as a segregated asset account of the Company.
The Company has since redomesticated to Arizona, effective January 1, 1996. The
separate account meets the definition of a "separate account" under the federal
securities laws and is registered with the Securities and Exchange Commission
(the "SEC") as a unit investment trust under the Investment Company Act of 1940.
This registration does not involve supervision of the management of the separate
account or the Company by the SEC.

      The assets of the separate account are the property of the Company.
However, the assets of the separate account, equal to its reserves and other
contract liabilities, are not chargeable with liabilities arising out of any
other business the Company may conduct. Income, gains, and losses, whether or
not realized, from assets allocated to the separate account are credited to or
charged against the separate account without regard to other income, gains, or
losses of the Company.

      The separate account is divided into Variable Portfolios, with the assets
of each Variable Portfolio invested in the shares of one of the underlying
funds. The Company does not guarantee the investment performance of the separate
account, its Variable Portfolios or the underlying funds. Values allocated to
the separate account and the amount of variable Income Payments will vary with
the values of shares of the underlying funds, and are also reduced by contract
charges.

      The basic objective of a variable annuity contract is to provide variable
Income Payments which will be to some degree responsive to changes in the
economic environment, including inflationary forces and changes in rates of
return available from various types of investments. The Contract is designed to
seek to accomplish this objective by providing that variable Income Payments
will reflect the investment performance of the separate account with respect to
amounts allocated to it both before and after the Annuity Date. Since the
separate account is always fully invested in shares of the underlying funds, its
investment performance reflects the investment performance of those entities.
The values of such shares held by the separate account fluctuate and are subject
to the risks of changing economic conditions as well as the risk inherent in the
ability of the underlying funds' managements to make necessary changes in their
funds to anticipate changes in economic conditions. Therefore, the owner bears
the entire investment risk that the basic objectives of the contract may not be
realized, and that the adverse effects of inflation may not be lessened. There
can be no assurance that the aggregate amount of variable Income Payments will
equal or exceed the Purchase Payments made with respect to a particular account
for the reasons described above, or because of the premature death of an
Annuitant.

      Another important feature of the contract related to its basic objective
is the Company's promise that the dollar amount of variable Income Payments made
during the lifetime of the Annuitant will not be adversely affected by the
actual mortality experience of the Company or by the actual expenses incurred by
the Company in excess of expense deductions provided for in the Contract
(although the Company does not guarantee the amounts of the variable


                                      -3-
<PAGE>   9

Income Payments).

                                 GENERAL ACCOUNT

      The General Account is made up of all of the general assets of the Company
other than those allocated to the separate account or any other segregated asset
account of the Company. A Purchase Payment may be allocated to the one-year
fixed investment option and/or the one year DCA fixed account available in
connection with the general account, as elected by the owner at the time of
purchasing a contract or upon making a subsequent payment. Assets supporting
amounts allocated to the one-year fixed investment option and/or the one-year
DCA account become part of the Company's general account assets and are
available to fund the claims of all classes of customers of the Company, as well
as of its creditors. Accordingly, all of the Company's assets held in the
general account will be available to fund the Company's obligations under the
contracts as well as such other claims.

      The Company will invest the assets of the general account in the manner
chosen by the Company and allowed by applicable state laws regarding the nature
and quality of investments that may be made by life insurance companies and the
percentage of their assets that may be committed to any particular type of
investment. In general, these laws permit investments, within specified limits
and subject to certain qualifications, in federal, state and municipal
obligations, corporate bonds, preferred and common stocks, real estate
mortgages, real estate and certain other investments.

                                PERFORMANCE DATA

      From time to time the separate account may advertise the Cash Management
Portfolio's "yield" and "effective yield." Both yield figures are based on
historical earnings and are not intended to indicate future performance. The
"yield" of the Cash Management Portfolio refers to the net income generated for
a contract funded by an investment in the Cash Management Portfolio (which
invests in shares of the Cash Management Portfolio of SunAmerica Series Trust)
over a seven-day period (which period will be stated in the advertisement). This
income is then "annualized." That is, the amount of income generated by the
investment during that week is assumed to be generated each week over a 52-week
period and is shown as a percentage of the investment. The "effective yield" is
calculated similarly but, when annualized, the income earned by an investment in
the Cash Management Portfolio is assumed to be reinvested at the end of each
seven day period. The "effective yield" will be slightly higher than the "yield"
because of the compounding effect of this assumed reinvestment. Neither the
yield nor the effective yield takes into consideration the effect of any capital
changes that might have occurred during the seven day period, nor do they
reflect the impact of premium taxes. The impact of other recurring charges on
both yield figures is, however, reflected in them to the same extent it would
affect the yield (or effective yield) for a contract of average size.

      In addition, the separate account may advertise "total return" date for
its other Variable


                                      -4-
<PAGE>   10
Portfolios. Like the yield figures described above, total return figures are
based on historical data and are not intended to indicate future performance.
The "total return" is a computed rate of return that, when compounded annually
over a stated period of time and applied to a hypothetical initial investment in
a Variable Portfolio made at the beginning of the period, will produce the same
contract value at the end of the period that the hypothetical investment would
have produced over the same period (assuming a complete redemption of the
contract at the end of the period.) Recurring contract charges are reflected in
the total return figures in the same manner as they are reflected in the yield
data for contracts funded through the Cash Management Portfolio.

      For periods starting prior to the date the contracts were first offered to
the public, the total return data for the Variable Portfolios of the separate
account will be derived from the performance of the corresponding underlying
funds of Anchor Series Trust and SunAmerica Series Trust, modified to reflect
the charges and expenses as if the separate account Variable Portfolio had been
in existence since the inception date of each respective Anchor Series Trust and
SunAmerica Series Trust underlying fund. Thus, such performance figures should
not be construed to be actual historic performance of the relevant separate
account Variable Portfolio. Rather, they are intended to indicate the historical
performance of the corresponding underlying funds of Anchor Series Trust and
SunAmerica Series Trust, adjusted to provide direct comparability to the
performance of the Variable Portfolios after the date the contracts were first
offered to the public (which will reflect the effect of fees and charges imposed
under the contracts). Anchor Series Trust and SunAmerica Series Trust have
served since their inception as underlying investment media for separate
accounts of other insurance companies in connection with variable contracts not
having the same fee and charge schedules as those imposed under the contracts.

      Performance data for the various Variable Portfolios are computed in the
manner described below.

CASH MANAGEMENT PORTFOLIO

      The annualized current yield and the effective yield for the Cash
Management Portfolio for the 7 day period ending September 30, 1999 were
2.96% and 3.00%, respectively.

      Current yield is computed by first determining the Base Period Return
attributable to a hypothetical contract having a balance of one Accumulation
Unit at the beginning of a 7 day period using the formula:

            Base Period Return = (EV-SV)/(SV)

      where:

            SV = value of one Accumulation Unit at the start of a 7 day period

            EV = value of one Accumulation Unit at the end of the 7 day period


                                      -5-
<PAGE>   11

      The value of the Accumulation Unit at the end of the period (EV) is
determined by (1) adding, to the value of the Accumulation Unit at the beginning
of the period (SV), the investment income from the underlying fund attributed to
the Accumulation Unit over the period, and (2) subtracting, from the result, the
portion of the annual mortality and expense risk and distribution expense
charges allocable to the 7 day period (obtained by multiplying the
annually-based charges by the fraction 7/365).

      The current yield is then obtained by annualizing the Base Period Return:

            Current Yield = (Base Period Return) x (365/7)

      The Cash Management Portfolio also quotes an "effective yield" that
differs from the current yield given above in that it takes into account the
effect of dividend reinvestment in the underlying fund. The effective yield,
like the current yield, is derived from the Base Period Return over a 7 day
period. However, the effective yield accounts for dividend reinvestment by
compounding the current yield according to the formula:

            Effective Yield = [(Base Period Return + 1)365/7 - 1]

      The yield quoted should not be considered a representation of the yield of
the Cash Management Portfolio in the future since the yield is not fixed. Actual
yields will depend on the type, quality and maturities of the investments held
by the underlying fund and changes in interest rates on such investments.

      Yield information may be useful in reviewing the performance of the Cash
Management Portfolio and for providing a basis for comparison with other
investment alternatives. However, the Cash Management Portfolio's yield
fluctuates, unlike bank deposits or other investments that typically pay a fixed
yield for a stated period of time.

OTHER VARIABLE PORTFOLIOS

      The Variable Portfolios of the separate account other than the Cash
Management Portfolio compute their performance data as "total return".

      The total returns of the various Variable Portfolios for 1 year and since
each Variable Portfolio's inception date are shown below.


                                      -6-
<PAGE>   12



                         VARIABLE ANNUITY ACCOUNT FOUR
                                RATES OF RETURN
                               SEPTEMBER 30, 1999

<TABLE>
<CAPTION>
                                                  Since
                                              Inception          1 Year
                                              -------------------------
<S>                                           <C>                <C>
Government & Quality Bond Portfolio               5.17%          -2.57%
Natural Resources Portfolio                       0.74%          26.32%
Growth Portfolio                                 23.52%          29.43%
Capital Appreciation Portfolio                   22.43%          50.01%
Corporate Bond Portfolio                          4.66%          -3.11%
Global Bond Portfolio                             6.50%          -2.37%
High Yield Bond Portfolio                         5.27%           2.50%
Worldwide High Income Portfolio                   3.29%          17.70%
Asset Allocation Portfolio                        9.65%           5.75%
Growth-Income Portfolio                          27.84%          38.35%
Venture Value Portfolio                          19.57%          24.10%
Alliance Growth Portfolio                        34.11%          43.00%
Global Equities Portfolio                        14.79%          31.35%
Utility Portfolio                                13.20%           3.60%
SunAmerica Balanced Portfolio                    19.02%          20.10%
Federated Value Portfolio                        17.91%          14.30%
Aggressive Growth Portfolio                      19.05%          56.29%
International Diversified Equities Portfolio     10.65%          18.84%
"Dogs" of Wall Street Portfolio                  -4.37%           7.21%
</TABLE>

- -------------

Total return figures are based on historical data and are not intended to
indicate future performance.

      Total return for a Variable Portfolio represents a single computed annual
rate of return that, when compounded annually over a specified time period (one,
five, and ten years, or since inception) and applied to a hypothetical initial
investment in a contract funded by that Variable Portfolio made at the beginning
of the period, will produce the same contract value at the end of the period
that the hypothetical investment would have produced over the same period. The
total rate of return (T) is computed so that it satisfies the formula:

            P(1+T)n = ERV

where:      P  = a hypothetical initial payment of $1,000
            T  = average annual total return
            n  = number of years

          ERV  = ending redeemable value of a hypothetical $1,000 payment
                 made at the beginning of the 1, 5, or 10 year period as of the
                 end of the period (or fractional portion thereof).


                                      -7-
<PAGE>   13

      The total return figures reflect the effect of recurring charges, as
discussed herein. Recurring charges are taken into account in a manner similar
to that used for the yield computations for the Cash Management Portfolio,
described above. As with the Cash Management Portfolio yield figures, total
return figures are derived from historical data and are not intended to be a
projection of future performance.

                                 INCOME PAYMENTS

INITIAL MONTHLY INCOME PAYMENTS

      The initial Income Payment is determined by applying separately that
portion of the contract value allocated to the fixed investment option and the
Variable Portfolio(s), less any premium tax, and then applying it to the annuity
table specified in the contract for fixed and variable Income Payments. Those
tables are based on a set amount per $1,000 of proceeds applied. The appropriate
rate must be determined by the sex (except where, as in the case of certain
Qualified contracts and other employer-sponsored retirement plans, such
classification is not permitted) and age of the Annuitant and designated second
person, if any.

      The dollars applied are then divided by 1,000 and the result multiplied by
the appropriate annuity factor appearing in the table to compute the amount of
the first monthly Income Payment. In the case of a variable annuity, that amount
is divided by the value of an Annuity Unit as of the Annuity Date to establish
the number of Annuity Units representing each variable Income Payment. The
number of Annuity Units determined for the first variable Income Payment remains
constant for the second and subsequent monthly variable Income Payments,
assuming that no reallocation of contract values is made.

SUBSEQUENT MONTHLY PAYMENTS

      For fixed Income Payments, the amount of the second and each subsequent
monthly Income Payment is the same as that determined above for the first
monthly payment.

      For variable Income Payments, the amount of the second and each subsequent
monthly Income Payment is determined by multiplying the number of Annuity Units,
as determined in connection with the determination of the initial monthly
payment, above, by the Annuity Unit value as of the day preceding the date on
which each Income Payment is due.

                               ANNUITY UNIT VALUES

      The value of an Annuity Unit is determined independently for each Variable
Portfolio.


                                      -8-
<PAGE>   14
      The annuity tables contained in the contract are based on a 3.5% per annum
assumed investment rate. If the actual net investment rate experienced by a
Variable Portfolio exceed 3.5%, variable Income Payments derived from
allocations to that Variable Portfolio will increase over time. Conversely, if
the actual rate is less than 3.5%, variable Income Payments will decrease over
time. If the net investment rate equals 3.5%, the variable Income Payments will
remain constant. If a higher assumed investment rate had been used, the initial
monthly payment would be higher, but the actual net investment rate would also
have to be higher in order for Income Payments to increase (or not to decrease).

      The payee receives the value of a fixed number of Annuity Units each
month. The value of a fixed number of Annuity Units will reflect the investment
performance of the Variable Portfolios elected, and the amount of each Income
Payment will vary accordingly.

      For each Variable Portfolio, the value of an Annuity Unit is determined by
multiplying the Annuity Unit value for the preceding month by the Net Investment
Factor for the month for which the Annuity Unit value is being calculated. The
result is then multiplied by a second factor which offsets the effect of the
assumed net investment rate of 3.5% per annum which is assumed in the annuity
tables contained in the contract.

NET INVESTMENT FACTOR

      The Net Investment Factor ("NIF") is an index applied to measure the net
investment performance of a Variable Portfolio from one day to the next. The NIF
may be greater or less than or equal to one; therefore, the value of an Annuity
Unit may increase, decrease or remain the same.

      The NIF for any Variable Portfolio for a certain month is determined by
dividing (a) by (b) where:

      (a)   is the Accumulation Unit value of the Variable Portfolio determined
            as of the end of that month, and

      (b)   is the Accumulation Unit value of the Variable Portfolio determined
            as of the end of the preceding month.

      The NIF for a Variable Portfolio for a given month is a measure of the net
investment performance of the Variable Portfolio from the end of the prior month
to the end of the given month. A NIF of 1.000 results from no change in the
value of the Variable Portfolio; a NIF greater than 1.000 results in from
increase in the value of the Variable Portfolio; and a NIF less than 1.000
results from a decrease in the value of the Variable Portfolio. The NIF is
increased (or decreased) in accordance with the increases (or decreases,
respectively) in the value of a share of the underlying fund in which the
Variable Portfolio invests; it is also reduced by separate account asset
charges.


                                      -9-
<PAGE>   15

      ILLUSTRATIVE EXAMPLE

      Assume that one share of a given Variable Portfolio had an Accumulation
Unit value of $11.46 as of the close of the New York Stock Exchange ("NYSE") on
the last business day in September; that its Accumulation Unit value had been
$11.44 at the close of the NYSE on the last business day at the end of the
previous month. The NIF for the month of September is:

                  NIF = ($11.46/$11.44)

                      =  1.00174825

      ILLUSTRATIVE EXAMPLE

      The change in Annuity Unit value for a Variable Portfolio from one month
to the next is determined in part by multiplying the Annuity Unit value at the
prior month end by the NIF for that Variable Portfolio for the new month. In
addition, however, the result of that computation must also be multiplied by an
additional factor that takes into account, and neutralizes, the assumed
investment rate of 3.5 percent per annum upon which the Income Payment tables
are based. For example, if the net investment rate for a Variable Portfolio
(reflected in the NIF) were equal to the assumed investment rate, the variable
Income Payments should remain constant (i.e., the Annuity Unit value should not
change). The monthly factor that neutralizes the assumed investment rate of 3.5
percent per annum is:

            1/[(1.035)(1/12)] = 0.99713732

      In the example given above, if the Annuity Unit value for the Variable
Portfolio was $10.103523 on the last business day in August, the Annuity Unit
value on the last business day in September would have been:

            $10.103523 x 1.00174825 x 0.99713732 = $10.092213

VARIABLE INCOME PAYMENTS

      ILLUSTRATIVE EXAMPLE

      Assume that a male owner, P, owns a contract in connection with which P
has allocated all of his contract value to a single Variable Portfolio. P is
also the sole Annuitant and, at age 60, has elected to annuitize his contract
under Option 4, a Life Annuity With 120 Monthly Payments Guaranteed. As of the
last valuation preceding the Annuity Date, P's Account was credited with
7543.2456 Accumulation Units each having a value of $15.432655, (i.e., P's
account value is equal to 7543.2456 x $15.432655 = $116,412.31). Assume also
that the Annuity Unit value for the Variable Portfolio on that same date is
$13.256932, and that the Annuity Unit value on the day immediately prior to the
second Income Payment date is


                                      -10-
<PAGE>   16

$13.327695.

P's first variable Income Payment is determined from the annuity rate tables in
P's contract, using the information assumed above. From the tables, which supply
monthly Income Payments for each $1,000 of applied contract value, P's first
variable Income Payment is determined by multiplying the monthly installment of
$5.42 (Option 4v table, male Annuitant age 60 at the Annuity Date) by the result
of dividing P's account value by $1,000:

           First Payment = $5.42 x ($116,412.31/$1,000) = $630.95

      The number of P's Annuity Units (which will be fixed; i.e., it will not
change unless he transfers his Annuity Units to Annuity Units of another
Variable Portfolio) is also determined at this time and is equal to the amount
of the first variable Income Payment divided by the value of an Annuity Unit on
the day immediately prior to annuitization:

           Annuity Units = $630.95/$13.256932 = 47.593968

      P's second variable Income Payment is determined by multiplying the number
of Annuity Units by the Annuity Unit value as of the day immediately prior to
the second payment due date:

           Second Payment = 47.593968 x $13.327695 = $634.32

      The third and subsequent variable Income Payments are computed in a manner
similar to the second variable Income Payment.

      Note that the amount of the first variable Income Payment depends on the
contract value in the relevant Variable Portfolio on the Annuity Date and thus
reflects the investment performance of the Variable Portfolio net of fees and
charges during the Accumulation Phase. The amount of that payment determines the
number of Annuity Units, which will remain constant during the Annuity Phase
(assuming no transfers from the Variable Portfolio). The net investment
performance of the Variable Portfolio during the Annuity Phase is reflected in
continuing changes during this phase in the Annuity Unit value, which determines
the amounts of the second and subsequent variable Income Payments.

                                      TAXES

GENERAL

      Section 72 of the Internal Revenue Code of 1986, as amended (the "Code")
governs taxation of annuities in general. An owner is not taxed on increases in
the value of a contract until distribution occurs, either in the form of a
non-annuity distribution or as income payments under the annuity option elected.
For a lump sum payment received as a total surrender (total redemption), the
recipient is taxed on the portion of the payment that exceeds the cost basis of


                                      -11-
<PAGE>   17
the contract. For a payment received as a withdrawal (partial redemption),
federal tax liability is determined on a last-in, first-out basis, meaning
taxable income is withdrawn before the cost basis of the contract is withdrawn.
For contracts issued in connection with Nonqualified plans, the cost basis is
generally the Purchase Payments, while for contracts issued in connection with
Qualified plans there may be no cost basis. The taxable portion of the lump sum
payment is taxed at ordinary income tax rates. Tax penalties may also apply.

      For income payments, the taxable portion is determined by a formula which
establishes the ratio that the cost basis of the contract bears to the total
value of income payments for the term of the annuity contract. The taxable
portion is taxed at ordinary income tax rates. Owners, Annuitants and
Beneficiaries under the contracts should seek competent financial advice about
the tax consequences of distributions under the retirement plan under which the
contracts are purchased.

      The Company is taxed as a life insurance company under the Code. For
federal income tax purposes, the separate account is not a separate entity from
the Company and its operations form a part of the Company.

WITHHOLDING TAX ON DISTRIBUTIONS

      The Code generally requires the Company (or, in some cases, a plan
administrator) to withhold tax on the taxable portion of any distribution or
withdrawal from a contract. For "eligible rollover distributions" from contracts
issued under certain types of Qualified plans, 20% of the distribution must be
withheld, unless the payee elects to have the distribution "rolled over" to
another eligible plan in a direct "trustee to trustee" transfer. This
requirement is mandatory and cannot be waived by the owner. Withholding on other
types of distributions can be waived.

      An "eligible rollover distribution" is the estimated taxable portion of
any amount received by a covered employee from a plan qualified under Section
401(a) or 403(a) of the Code, or from a tax-sheltered annuity qualified under
Section 403(b) of the Code (other than (1) income payments for the life (or life
expectancy) of the employee, or joint lives (or joint life expectancies) of the
employee and his or her designated Beneficiary, or for a specified period of ten
years or more; and (2) distributions required to be made under the Code).
Failure to "roll over" the entire amount of an eligible rollover distribution
(including an amount equal to the 20% portion of the distribution that was
withheld) could have adverse tax consequences, including the imposition of a
penalty tax on premature withdrawals, described later in this section.

      Withdrawals or distributions from a contract other than eligible rollover
distributions are also subject to withholding on the estimated taxable portion
of the distribution, but the owner may elect in such cases to waive the
withholding requirement. If not waived, withholding is imposed (1) for periodic
payments, at the rate that would be imposed if the payments were wages, or (2)
for other distributions, at the rate of 10%. If no withholding exemption
certificate is in effect for the payee, the rate under (1) above is computed by
treating the payee as a married individual claiming 3 withholding exemptions.


                                      -12-
<PAGE>   18
DIVERSIFICATION - SEPARATE ACCOUNT INVESTMENTS

      Section 817(h) of the Code imposes certain diversification standards on
the underlying assets of variable annuity contracts. The Code provides that a
variable annuity contract will not be treated as an annuity contract for any
period (and any subsequent period) for which the investments are not adequately
diversified, in accordance with regulations prescribed by the United States
Treasury Department ("Treasury Department"). Disqualification of the contract as
an annuity contract would result in imposition of federal income tax to the
owner with respect to earnings allocable to the contract prior to the receipt of
payments under the contract. The Code contains a safe harbor provision which
provides that annuity contracts such as the contracts meet the diversification
requirements if, as of the close of each calendar quarter, the underlying assets
meet the diversification standards for a regulated investment company, and no
more than 55% of the total assets consist of cash, cash items, U.S. government
securities and securities of other regulated investment companies.

      The Treasury Department has issued regulations which establish
diversification requirements for the investment portfolios underlying variable
contracts such as the contracts. The regulations amplify the diversification
requirements for variable contracts set forth in the Code and provide an
alternative to the safe harbor provision described above. Under the regulations
an investment portfolio will be deemed adequately diversified if (1) no more
than 55% of the value of the total assets of the portfolio is represented by any
one investment; (2) no more than 70% of the value of the total assets of the
portfolio is represented by any two investments; (3) no more than 80% of the
value of the total assets of the portfolio is represented by any three
investments; and (4) no more than 90% of the value of the total assets of the
portfolio is represented by any four investments. For purposes of determining
whether or not the diversification standards imposed on the underlying assets of
variable contracts by Section 817(h) of the Code have been met, "each United
States government agency or instrumentality shall be treated as a separate
issuer."


MULTIPLE CONTRACTS

      Multiple annuity contracts which are issued within a calendar year to the
same contract owner by one company or its affiliates are treated as one annuity
contract for purposes of determining the tax consequences of any distribution.
Such treatment may result in adverse tax consequences including more rapid
taxation of the distributed amounts from such multiple contracts. The Company
believes that Congress intended to affect the purchase of multiple deferred
annuity contracts which may have been purchased to avoid withdrawal income tax
treatment. Owners should consult a tax adviser prior to purchasing more than one
annuity contract in any calendar year.

TAX TREATMENT OF ASSIGNMENTS

      An assignment of a Contract may have tax consequences, and may also be
prohibited by ERISA in some circumstances. Owners should therefore consult
competent legal advisers should they wish to assign their contracts.


                                      -13-
<PAGE>   19
QUALIFIED PLANS

      The contracts offered by this prospectus are designed to be suitable for
use under various types of Qualified plans. Taxation of owners in each Qualified
plan varies with the type of plan and terms and conditions of each specific
plan. Owners, Annuitants and Beneficiaries are cautioned that benefits under a
Qualified plan may be subject to the terms and conditions of the plan,
regardless of the terms and conditions of the contracts issued pursuant to the
plan.

      Following are general descriptions of the types of Qualified plans with
which the contracts may be used. Such descriptions are not exhaustive and are
for general information purposes only. The tax rules regarding Qualified plans
are very complex and will have differing applications depending on individual
facts and circumstances. Each purchaser should obtain competent tax advice prior
to purchasing a contract issued under a Qualified plan.

      Contracts issued pursuant to Qualified plans include special provisions
restricting contract provisions that may otherwise be available and described in
this prospectus. Generally, contracts issued pursuant to Qualified plans are not
transferable except upon surrender or annuitization. Various penalty and excise
taxes may apply to contributions or distributions made in violation of
applicable limitations. Furthermore, certain withdrawal penalties and
restrictions may apply to surrenders from Qualified contracts.

      (a)   H.R. 10 PLANS

            Section 401 of the Code permits self-employed individuals to
      establish Qualified plans for themselves and their employees, commonly
      referred to as "H.R.10" or "Keogh" Plans. Contributions made to the plan
      for the benefit of the employees will not be included in the gross income
      of the employees until distributed from the plan. The tax consequences to
      owners may vary depending upon the particular plan design. However, the
      Code places limitations and restrictions on all plans on such items as:
      amounts of allowable contributions; form, manner and timing of
      distributions; vesting and nonforfeitability of interests;
      nondiscrimination in eligibility and participation; and the tax treatment
      of distributions, withdrawals and surrenders. Purchasers of contracts for
      use with an H.R. 10 Plan should obtain competent tax advice as to the tax
      treatment and suitability of such an investment.

      (b)   TAX-SHELTERED ANNUITIES

            Section 403(b) of the Code permits the purchase of "tax-sheltered
      annuities" by public schools and certain charitable, education and
      scientific organizations described in Section 501(c)(3) of the Code. These
      qualifying employers may make contributions to the contracts for the
      benefit of their employees. Such contributions are not includible in the
      gross income of the employee until the employee receives distributions
      from the contract. The amount of contributions to the tax-sheltered
      annuity is limited to certain maximums imposed by the Code. Furthermore,
      the Code sets forth additional restrictions governing such items as
      transferability, distributions, nondiscrimination and withdrawals. Any


                                      -14-
<PAGE>   20
      employee should obtain competent tax advice as to the tax treatment and
      suitability of such an investment.

      (c)   INDIVIDUAL RETIREMENT ANNUITIES

            Section 408(b) of the Code permits eligible individuals to
      contribute to an individual retirement program known as an "Individual
      Retirement Annuity" ("IRA"). Under applicable limitations, certain amounts
      may be contributed to an IRA which will be deductible from the
      individual's gross income. These IRAs are subject to limitations on
      eligibility, contributions, transferability and distributions. Sales of
      contracts for use with IRAs are subject to special requirements imposed by
      the Code, including the requirement that certain informational disclosure
      be given to persons desiring to establish an IRA. Purchasers of contracts
      to be qualified as IRAs should obtain competent tax advice as to the tax
      treatment and suitability of such an investment.

      (d)   ROTH IRAS

            Section 408A of the Code permits an individual to contribute to an
      individual retirement program called a Roth IRA. Unlike contributions to a
      regular IRA under Section 408(b) of the Code, contributions to a Roth IRA
      are not made on a tax deferred basis, but distributions are tax-free if
      certain requirements are satisfied. Like regular IRAs, Roth IRAs are
      subject to limitations on the amount that may be contributed, those who
      may be eligible and the time when distributions may commence without tax
      penalty. Certain persons may be eligible to convert a regular IRA into a
      Roth IRA, and the resulting income tax may be spread over four years if
      the conversion occurs before January 1, 1999. If and when Contracts are
      made available for use with Roth IRAs they may be subject to special
      requirements imposed by the Internal Revenue Service. Purchasers of the
      Contracts for this purpose will be provided with such supplementary
      information as may be required by the Internal Revenue Service or other
      appropriate agency.

      (e)   CORPORATE PENSION AND PROFIT-SHARING PLANS

            Sections 401(a) and 401(k) of the Code permit corporate employers to
      establish various types of retirement plans for employees. These
      retirement plans may permit the purchase of the contracts to provide
      benefits under the plan. Contributions to the plan for the benefit of
      employees will not be includible in the gross income of the employee until
      distributed from the plan. The tax consequences to owners may vary
      depending upon the particular plan design. However, the Code places
      limitations on all plans on such items as amount of allowable
      contributions; form, manner and timing of distributions; vesting and
      nonforfeitability of interests; nondiscrimination in eligibility and
      participation; and the tax treatment of distributions, withdrawals and
      surrenders. Purchasers of contracts for use with corporate pension or
      profit sharing plans should obtain competent tax advice as to the tax
      treatment and suitability of such an investment.


                                      -15-
<PAGE>   21
      (f)   DEFERRED COMPENSATION PLANS - SECTION 457

            Under Section 457 of the Code, governmental and certain other
      tax-exempt employers may establish, for the benefit of their employees,
      deferred compensation plans which may invest in annuity contracts. The
      Code, as in the case of Qualified plans, establishes limitations and
      restrictions on eligibility, contributions and distributions. Under these
      plans, contributions made for the benefit of the employees will not be
      includible in the employees' gross income until distributed from the plan.
      However, under a 457 plan all the plan assets shall remain solely the
      property of the employer, subject only to the claims of the employer's
      general creditors until such time as made available to an owner or a
      Beneficiary.

                            DISTRIBUTION OF CONTRACTS

      The contracts are offered through  SunAmerica  Capital  Services,  Inc.,
located at 733 Third Avenue,  4th Floor, New York, New York 10017.  SunAmerica
Capital Services,  Inc. is registered as a broker-dealer  under the Securities
Exchange Act of 1934, as amended,  and is a member of the National Association
of  Securities  Dealers,  Inc. The Company and  SunAmerica  Capital  Services,
Inc. are each an indirect wholly owned subsidiary of SunAmerica Inc.

      For the period ended September 30, 1998, the aggregate amount of
underwriting commissions paid by the Company to SunAmerica Capital Services,
Inc. was $1,311,896, of which $146,254 was retained by it. For the period from
inception to September 30, 1997, the aggregate amount of underwriting
commissions paid by the Company to SunAmerica Capital Services, Inc. was
$202,414, of which $23,398 was retained by it.

      Contracts are offered on a continuous basis.

                              FINANCIAL STATEMENTS


      The audited consolidated financial statements of the Company as of
September 30, 1998 and 1997 and for each of the three years in the period ended
September 30, 1998 are presented in this Statement of Additional Information.
Effective October 1, 1999, the Company changed its fiscal year end to December
31. Reflecting this change, also included in this Statement of Additional
Information is the Company's Audited Transition Report as of and for the three
month period ended December 31, 1998. The consolidated financial statements of
the Company should be considered only as bearing on the ability of the Company
to meet its obligation under the Contracts. Additionally, as of October 1, 1999,
the separate account also changed its fiscal year end to December 31. The
interim financial statements of Variable Annuity Account Four as of September
30, 1999 and for each of the two years ended September 30, 1999 are included in
this Statement of Additional Information.


      PricewaterhouseCoopers LLP, 400 South Hope Street, Los Angeles, California
90071, serves as the independent accountants for the separate account and the
Company. The financial


                                      -16-
<PAGE>   22


statements referred to above have been so included in reliance on the reports of
PricewaterhouseCoopers LLP, independent accountants, given on the authority of
said firm as experts in auditing and accounting.


                                      -17-
<PAGE>   23
                        Report of Independent Accountants



To the Board of Directors and Shareholder of
Anchor National Life Insurance Company:


In our opinion, the accompanying consolidated balance sheet and the related
consolidated statement of income and comprehensive income and cash flows present
fairly, in all material respects, the financial position of Anchor National Life
Insurance Company and its subsidiaries (the "Company") at December 31, 1998,
September 30, 1998 and 1997, and the results of their operations and their cash
flows for the three months ended December 31, 1998 and for each of the three
fiscal years in the period ended September 30, 1998, in conformity with
generally accepted accounting principles. These financial statements are the
responsibility of the Company's management; our responsibility is to express an
opinion on these consolidated financial statements based on our audits. We
conducted our audits of these statements in accordance with generally accepted
auditing standards, which require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements, assessing the
accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for the opinion expressed above.



PricewaterhouseCoopers LLP
Los Angeles, California



November 19, 1999


                                        3


<PAGE>   24


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
                           CONSOLIDATED BALANCE SHEET

<TABLE>
<CAPTION>
                                                                                At September 30,
                                                    December 31,      ------------------------------------
                                                       1998                 1998                 1997
                                                 ---------------      ---------------      ---------------
<S>                                              <C>                  <C>                  <C>
ASSETS

Investments:
   Cash and short-term investments               $ 3,303,454,000      $   333,735,000      $   113,580,000
   Bonds, notes and redeemable
      preferred stocks available for sale,
      at fair value (amortized cost:
      December 1998, $4,252,740,000;
      September 1998, $1,934,863,000;
      September 1997, $1,942,485,000)              4,248,840,000        1,954,754,000        1,986,194,000
   Mortgage loans                                    388,780,000          391,448,000          339,530,000
   Policy loans                                      320,688,000           11,197,000           10,948,000
   Common stocks available for sale,
      at fair value (cost: December 1998,
      $1,409,000; September 1998, $115,000;
      September 1997, $271,000)                        1,419,000              169,000            1,275,000
   Partnerships                                        4,577,000            4,403,000           46,880,000
   Real estate                                        24,000,000           24,000,000           24,000,000
   Other invested assets                              15,185,000           15,036,000           85,894,000
                                                 ---------------      ---------------      ---------------

   Total investments                               8,306,943,000        2,734,742,000        2,608,301,000

Variable annuity assets held in separate
   accounts                                       13,767,213,000       11,133,569,000        9,343,200,000
Accrued investment income                             73,441,000           26,408,000           21,759,000
Deferred acquisition costs                           866,053,000          539,850,000          536,155,000
Income taxes currently receivable                           --              5,869,000                 --
Receivable from brokers for sales of
   securities                                         22,826,000           23,904,000            2,290,000
Other assets                                         109,857,000           85,926,000           61,524,000
                                                 ---------------      ---------------      ---------------

TOTAL ASSETS                                     $23,146,333,000      $14,550,268,000      $12,573,229,000
                                                 ===============      ===============      ===============
</TABLE>



                             See accompanying notes


                                        4
<PAGE>   25

                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
                     CONSOLIDATED BALANCE SHEET (Continued)

<TABLE>
<CAPTION>
                                                                                   At September 30,
                                                    December 31,        --------------------------------------
                                                       1998                   1998                  1997
                                                 ----------------       ----------------      ----------------
<S>                                              <C>                    <C>                   <C>
LIABILITIES AND SHAREHOLDER'S EQUITY

Reserves, payables and accrued liabilities:
   Reserves for fixed annuity contracts          $  5,500,157,000       $  2,189,272,000      $  2,098,803,000
   Reserves for universal life insurance
      contracts                                     2,339,194,000                   --                    --
   Reserves for guaranteed investment
      contracts                                       306,461,000            282,267,000           295,175,000
   Payable to brokers for purchases of
      securities                                             --               50,957,000             2,553,000
   Income taxes currently payable                      11,123,000                   --              32,265,000
   Other liabilities                                  160,020,000            106,594,000           122,728,000
                                                 ----------------       ----------------      ----------------

   Total reserves, payables
      and accrued liabilities                       8,316,955,000          2,629,090,000         2,551,524,000
                                                 ----------------       ----------------      ----------------

Variable annuity liabilities related to
   separate accounts                               13,767,213,000         11,133,569,000         9,343,200,000
                                                 ----------------       ----------------      ----------------

Subordinated notes payable to affiliates              209,367,000             39,182,000            36,240,000
                                                 ----------------       ----------------      ----------------

Deferred income taxes                                 105,772,000             95,758,000            67,047,000
                                                 ----------------       ----------------      ----------------

Shareholder's equity:
   Common Stock                                         3,511,000              3,511,000             3,511,000
   Additional paid-in capital                         378,674,000            308,674,000           308,674,000
   Retained earnings                                  366,460,000            332,069,000           244,628,000
   Accumulated other comprehensive
      income (loss)                                    (1,619,000)             8,415,000            18,405,000
                                                 ----------------       ----------------      ----------------

   Total shareholder's equity                         747,026,000            652,669,000           575,218,000
                                                 ----------------       ----------------      ----------------

TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY       $ 23,146,333,000       $ 14,550,268,000      $ 12,573,229,000
                                                 ================       ================      ================
</TABLE>



                             See accompanying notes


                                        5

<PAGE>   26


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
            CONSOLIDATED STATEMENT OF INCOME AND COMPREHENSIVE INCOME


<TABLE>
<CAPTION>
                                                                          Years Ended September 30,
                                     Three Months Ended     -----------------------------------------------------
                                      December 31, 1998         1998                 1997                1996
                                     ------------------     -------------       -------------       -------------
<S>                                     <C>                 <C>                 <C>                 <C>
Investment income                       $  54,278,000       $ 221,966,000       $ 210,759,000       $ 164,631,000
                                        -------------       -------------       -------------       -------------

Interest expense on:
   Fixed annuity contracts                (22,828,000)       (112,695,000)       (109,217,000)        (82,690,000)
   Guaranteed investment
      contracts                            (3,980,000)        (17,787,000)        (22,650,000)        (19,974,000)
   Senior indebtedness                        (34,000)         (1,498,000)         (2,549,000)         (2,568,000)
   Subordinated notes payable to
      affiliates                             (471,000)         (3,114,000)         (3,142,000)         (2,556,000)
                                        -------------       -------------       -------------       -------------

   Total interest expense                 (27,313,000)       (135,094,000)       (137,558,000)       (107,788,000)
                                        -------------       -------------       -------------       -------------

NET INVESTMENT INCOME                      26,965,000          86,872,000          73,201,000          56,843,000
                                        -------------       -------------       -------------       -------------

NET REALIZED INVESTMENT GAINS
   (LOSSES)                                   271,000          19,482,000         (17,394,000)        (13,355,000)
                                        -------------       -------------       -------------       -------------

Fee income:
   Variable annuity fees                   58,806,000         200,867,000         139,492,000         103,970,000
   Net retained commissions                11,479,000          48,561,000          39,143,000          31,548,000
   Asset management fees                    8,068,000          29,592,000          25,764,000          25,413,000
   Surrender charges                        3,239,000           7,404,000           5,529,000           5,184,000
   Other fees                               1,738,000           3,938,000           3,218,000           3,390,000
                                        -------------       -------------       -------------       -------------

TOTAL FEE INCOME                           83,330,000         290,362,000         213,146,000         169,505,000
                                        -------------       -------------       -------------       -------------

GENERAL AND ADMINISTRATIVE
   EXPENSES                               (22,375,000)        (96,102,000)        (98,802,000)        (81,552,000)
                                        -------------       -------------       -------------       -------------

AMORTIZATION OF DEFERRED
   ACQUISITION COSTS                      (27,070,000)        (72,713,000)        (66,879,000)        (57,520,000)
                                        -------------       -------------       -------------       -------------

ANNUAL COMMISSIONS                         (6,624,000)        (18,209,000)         (8,977,000)         (4,613,000)
                                        -------------       -------------       -------------       -------------

PRETAX INCOME                              54,497,000         209,692,000          94,295,000          69,308,000

Income tax expense                        (20,106,000)        (71,051,000)        (31,169,000)        (24,252,000)
                                        -------------       -------------       -------------       -------------

NET INCOME                                 34,391,000         138,641,000          63,126,000          45,056,000
                                        -------------       -------------       -------------       -------------

Other comprehensive income, net
  of tax:

Net unrealized gains on bonds and
  notes available for sale:
      Net unrealized gains
         identified in the current
         period                           (10,249,000)         (4,027,000)         16,605,000         (11,265,000)
      Less reclassification
         Adjustment for net
         realized gains included
         in net income                        215,000          (5,963,000)          7,321,000          11,417,000
                                        -------------       -------------       -------------       -------------

OTHER COMPREHENSIVE INCOME (LOSS)         (10,034,000)         (9,990,000)         23,926,000             152,000
                                        -------------       -------------       -------------       -------------

COMPREHENSIVE INCOME                    $  24,357,000       $ 128,651,000       $  87,052,000       $  45,208,000
                                        =============       =============       =============       =============
</TABLE>



                             See accompanying notes


                                        6

<PAGE>   27


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
                      CONSOLIDATED STATEMENT OF CASH FLOWS


<TABLE>
<CAPTION>
                                                                                    Years Ended September 30,
                                           Three Months Ended      -----------------------------------------------------------
                                            December 31, 1998            1998                  1997                  1996
                                           ------------------      ---------------       ---------------       ---------------
<S>                                          <C>                   <C>                   <C>                   <C>
CASH FLOWS FROM OPERATING
   ACTIVITIES:
   Net income                                $    34,391,000       $   138,641,000       $    63,126,000       $    45,056,000
   Adjustments to reconcile net
      income to net cash provided
      by operating activities:
         Interest credited to:
            Fixed annuity contracts               22,828,000           112,695,000           109,217,000            82,690,000
            Guaranteed investment
               contracts                           3,980,000            17,787,000            22,650,000            19,974,000
         Net realized investment losses
           (gains)                                  (271,000)          (19,482,000)           17,394,000            13,355,000
         Amortization (accretion) of
            net premiums (discounts)
            on investments                        (1,199,000)              447,000           (18,576,000)           (8,976,000)
         Amortization of goodwill                    356,000             1,422,000             1,187,000             1,169,000
         Provision for deferred income
            taxes                                 15,945,000            34,087,000           (16,024,000)           (3,351,000)
   Change in:
      Accrued investment income                   (1,512,000)           (4,649,000)           (2,084,000)           (5,483,000)
      Deferred acquisition costs                 (34,328,000)         (160,926,000)         (113,145,000)          (60,941,000)
      Other assets                               (21,070,000)          (19,374,000)          (14,598,000)           (8,000,000)
      Income taxes currently payable              16,992,000           (38,134,000)           10,779,000             5,766,000
      Other liabilities                            5,617,000            (2,248,000)           14,187,000             5,474,000
   Other, net                                      5,510,000            (5,599,000)              418,000              (129,000)
                                             ---------------       ---------------       ---------------       ---------------

NET CASH PROVIDED BY OPERATING
   ACTIVITIES                                     47,239,000            54,667,000            74,531,000            86,604,000
                                             ---------------       ---------------       ---------------       ---------------

CASH FLOWS FROM INVESTING
   ACTIVITIES:
   Purchases of:
      Bonds, notes and redeemable
         preferred stocks                       (392,515,000)       (1,970,502,000)       (2,566,211,000)       (1,937,890,000)
      Mortgage loans                              (4,962,000)         (131,386,000)         (266,771,000)          (15,000,000)
      Other investments, excluding
         short-term investments                   (1,992,000)                 --             (75,556,000)          (36,770,000)
   Sales of:
      Bonds, notes and redeemable
         Preferred stocks                        265,039,000         1,602,079,000         2,299,063,000         1,241,928,000
      Real estate                                       --                    --                    --                 900,000
      Other investments, excluding
         short-term investments                      142,000            42,458,000             6,421,000             4,937,000
   Redemptions and maturities of:
      Bonds, notes and redeemable
         preferred stocks                         37,290,000           424,393,000           376,847,000           288,969,000
      Mortgage loans                               7,699,000            80,515,000            25,920,000            11,324,000
      Other investments, excluding
         short-term investments                      853,000            67,213,000            23,940,000            20,749,000
   Cash and short-term investments
      acquired in coinsurance
      transaction with MBL Life
      Assurance Corporation                    3,083,211,000                  --                    --                    --
                                             ---------------       ---------------       ---------------       ---------------

NET CASH PROVIDED (USED) BY INVESTING
   ACTIVITIES                                  2,994,765,000           114,770,000          (176,347,000)         (420,853,000)
                                             ---------------       ---------------       ---------------       ---------------
</TABLE>


                                       7


<PAGE>   28


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
                CONSOLIDATED STATEMENT OF CASH FLOWS (Continued)

<TABLE>
<CAPTION>
                                                                                Years Ended September 30,
                                       Three Months Ended      -----------------------------------------------------------
                                        December 31, 1998           1998                  1997                  1996
                                       ------------------      ---------------       ---------------       ---------------
<S>                                      <C>                   <C>                   <C>                   <C>
CASH FLOWS FROM FINANCING
    ACTIVITIES:
   Premium receipts on:
      Fixed annuity contracts            $   351,616,000       $ 1,512,994,000       $ 1,097,937,000       $   741,774,000
      Guaranteed investment
         contracts                                  --               5,619,000            55,000,000           134,967,000
   Net exchanges from the fixed
      accounts of variable annuity
      contracts                             (448,762,000)       (1,303,790,000)         (620,367,000)         (236,705,000)
   Withdrawal payments on:
      Fixed annuity contracts                (41,554,000)         (191,690,000)         (242,589,000)         (263,614,000)
      Guaranteed investment
         contracts                            (3,797,000)          (36,313,000)         (198,062,000)          (16,492,000)
   Claims and annuity payments
      on fixed annuity contracts              (9,333,000)          (40,589,000)          (35,731,000)          (31,107,000)
   Net receipts from (repayments
      of) other short-term
      financings                               9,545,000           (10,944,000)           34,239,000          (119,712,000)
   Net receipt/(payment) related to
      a modified coinsurance
      transaction                           (170,436,000)          166,631,000                  --                    --
   Receipts from issuance of
      subordinated note payable
         to affiliate                        170,436,000                  --                    --                    --
   Capital contribution received              70,000,000                  --              28,411,000            27,387,000
   Dividends paid                                   --             (51,200,000)          (25,500,000)          (29,400,000)
                                         ---------------       ---------------       ---------------       ---------------

NET CASH  PROVIDED (USED) BY
   FINANCING ACTIVITIES                      (72,285,000)           50,718,000            93,338,000           207,098,000
                                         ---------------       ---------------       ---------------       ---------------

NET INCREASE (DECREASE) IN CASH
   AND SHORT-TERM INVESTMENTS              2,969,719,000           220,155,000            (8,478,000)         (127,151,000)

CASH AND SHORT-TERM INVESTMENTS
   AT BEGINNING OF PERIOD                    333,735,000           113,580,000           122,058,000           249,209,000
                                         ---------------       ---------------       ---------------       ---------------

CASH AND SHORT-TERM INVESTMENTS
   AT END OF PERIOD                      $ 3,303,454,000       $   333,735,000       $   113,580,000       $   122,058,000
                                         ===============       ===============       ===============       ===============

SUPPLEMENTAL CASH FLOW
   INFORMATION:

   Interest paid on indebtedness         $       536,000       $     3,912,000       $     7,032,000       $     5,982,000
                                         ===============       ===============       ===============       ===============

   Net income taxes paid (refunded)      $   (12,302,000)      $    74,932,000       $    36,420,000       $    22,031,000
                                         ===============       ===============       ===============       ===============
</TABLE>



                             See accompanying notes


                                        8

<PAGE>   29


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.       NATURE OF OPERATIONS

         Anchor National Life Insurance Company (the "Company") is an
         Arizona-domiciled life insurance company and conducts its business
         through three segments: annuity operations, asset management operations
         and broker-dealer operations. Annuity operations include the sale and
         administration of fixed and variable annuities and guaranteed
         investment contracts. Asset management operations, which include the
         sale and management of mutual funds, is conducted by SunAmerica Asset
         Management Corp. Broker-dealer operations include the sale of
         securities and financial services products, and are conducted by Royal
         Alliance Associates, Inc.

         The operations of the Company are influenced by many factors, including
         general economic conditions, monetary and fiscal policies of the
         federal government, and policies of state and other regulatory
         authorities. The level of sales of the Company's financial products is
         influenced by many factors, including general market rates of interest,
         strength, weakness and volatility of equity markets, and terms and
         conditions of competing financial products. The Company is exposed to
         the typical risks normally associated with a portfolio of fixed-income
         securities, namely interest rate, option, liquidity and credit risk.
         The Company controls its exposure to these risks by, among other
         things, closely monitoring and matching the duration of its assets and
         liabilities, monitoring and limiting prepayment and extension risk in
         its portfolio, maintaining a large percentage of its portfolio in
         highly liquid securities, and engaging in a disciplined process of
         underwriting, reviewing and monitoring credit risk. The Company also is
         exposed to market risk, as market volatility may result in reduced fee
         income in the case of assets managed in mutual funds and held in
         separate accounts.

2.       SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

         BASIS OF PRESENTATION: At December 31, 1998, the Company was a wholly
         owned indirect subsidiary of SunAmerica Inc. On January 1, 1999,
         SunAmerica Inc. merged with and into American International Group, Inc.
         ("AIG") in a tax-free reorganization that has been treated as a pooling
         of interests for accounting purposes. Thus, SunAmerica Inc. ceased to
         exist on that date. However, on the date of merger, substantially all
         of the net assets of SunAmerica Inc. were contributed to a newly formed
         subsidiary of AIG named SunAmerica Inc. ("SunAmerica").

         The accompanying consolidated financial statements have been prepared
         in accordance with generally accepted accounting principles and include
         the accounts of the Company and all of its wholly owned subsidiaries.
         All significant intercompany accounts and transactions are eliminated
         in consolidation. Certain items have been reclassified to conform to
         the current period's presentation.

         The preparation of financial statements in conformity with generally
         accepted accounting principles requires the use of estimates and
         assumptions that affect the amounts reported in the financial
         statements and the accompanying notes. Actual results could differ from
         those estimates.


                                        9


<PAGE>   30


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2.       SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

         INVESTMENTS: Cash and short-term investments primarily include cash,
         commercial paper, money market investments, repurchase agreements and
         short-term bank participations. All such investments are carried at
         cost plus accrued interest, which approximates fair value, have
         maturities of three months or less and are considered cash equivalents
         for purposes of reporting cash flows.

         Bonds, notes and redeemable preferred stocks available for sale and
         common stocks are carried at aggregate fair value and changes in
         unrealized gains or losses, net of tax, are credited or charged
         directly to shareholder's equity. Bonds, notes and redeemable preferred
         stocks are reduced to estimated net realizable value when necessary for
         declines in value considered to be other than temporary. Estimates of
         net realizable value are subjective and actual realization will be
         dependent upon future events.

         Mortgage loans are carried at amortized unpaid balances, net of
         provisions for estimated losses. Policy loans are carried at unpaid
         balances. Limited partnerships are accounted for by the cost method of
         accounting. Real estate is carried at the lower of cost or fair value.
         Other invested assets include investments in separate account
         investments, leveraged leases, and collateralized mortgage obligation
         residuals.

         Realized gains and losses on the sale of investments are recognized in
         operations at the date of sale and are determined by using the specific
         cost identification method. Premiums and discounts on investments are
         amortized to investment income by using the interest method over the
         contractual lives of the investments.

         INTEREST RATE SWAP AGREEMENTS: The net differential to be paid or
         received on interest rate swap agreements ("Swap Agreements") entered
         into to reduce the impact of changes in interest rates is recognized
         over the lives of the agreements, and such differential is classified
         as Investment Income or Interest Expense in the income statement.
         Initially, Swap Agreements are designated as hedges and, therefore, are
         not marked to market. However, when a hedged asset/liability is sold or
         repaid before the related Swap Agreement matures, the Swap Agreement is
         marked to market and any gain/loss is classified with any gain/loss
         realized on the disposition of the hedged asset/liability.
         Subsequently, the Swap Agreement is marked to market and the resulting
         change in fair value is included in Investment Income in the income
         statement. When a Swap Agreement that is designated as a hedge is
         terminated before its contractual maturity, any resulting gain/loss is
         credited/charged to the carrying value of the asset/liability that it
         hedged and is treated as a premium/discount for the remaining life of
         the asset/liability.

         DEFERRED ACQUISITION COSTS: Policy acquisition costs are deferred and
         amortized, with interest, in relation to the incidence of estimated
         gross profits to be realized over the estimated lives of the annuity
         contracts. Estimated gross profits are composed of net interest income,
         net realized investment gains and losses, variable annuity fees,
         surrender charges and direct administrative expenses. Costs incurred to
         sell mutual funds are also deferred and amortized over the


                                       10

<PAGE>   31


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2.       SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

         estimated lives of the funds obtained. Deferred acquisition costs
         ("DAC") consist of commissions and other costs that vary with, and are
         primarily related to, the production or acquisition of new business.

         As debt and equity securities available for sale are carried at
         aggregate fair value, an adjustment is made to DAC equal to the change
         in amortization that would have been recorded if such securities had
         been sold at their stated aggregate fair value and the proceeds
         reinvested at current yields. The change in this adjustment, net of
         tax, is included with the change in accumulated other comprehensive
         income/(loss) that is credited or charged directly to shareholder's
         equity. DAC has been increased by $1,400,000 at December 31, 1998,
         decreased by $7,000,000 at September 30, 1998, and decreased by
         $16,400,000 at September 30, 1997 for this adjustment.

         VARIABLE ANNUITY ASSETS AND LIABILITIES: The assets and liabilities
         resulting from the receipt of variable annuity premiums are segregated
         in separate accounts. The Company receives administrative fees for
         managing the funds and other fees for assuming mortality and certain
         expense risks. Such fees are included in Variable Annuity Fees in the
         income statement.

         GOODWILL: Goodwill, amounting to $22,983,000 at December 31, 1998, is
         amortized by using the straight-line method over periods averaging 25
         years and is included in Other Assets in the balance sheet. Goodwill is
         evaluated for impairment when events or changes in economic conditions
         indicate that the carrying amount may not be recoverable.

         CONTRACTHOLDER RESERVES: Contractholder reserves for fixed annuity
         contracts and guaranteed investment contracts are accounted for as
         investment-type contracts in accordance with Statement of Financial
         Accounting Standards No. 97, "Accounting and Reporting by Insurance
         Enterprises for Certain Long-Duration Contracts and for Realized Gains
         and Losses from the Sale of Investments," and are recorded at
         accumulated value (premiums received, plus accrued interest, less
         withdrawals and assessed fees).

         FEE INCOME: Variable annuity fees, asset management fees and surrender
         charges are recorded in income as earned. Net retained commissions are
         recognized as income on a trade date basis.

         INCOME TAXES: The Company is included in the consolidated federal
         income tax return of the Parent and files as a "life insurance company"
         under the provisions of the Internal Revenue Code of 1986. Income taxes
         have been calculated as if the Company filed a separate return.
         Deferred income tax assets and liabilities are recognized based on the
         difference between financial statement carrying amounts and income tax
         bases of assets and liabilities using enacted income tax rates and
         laws.

         RECENTLY ISSUED ACCOUNTING STANDARDS: In June 1997, the Financial
         Accounting Standards Board (the "FASB") issued Statement of Financial
         Accounting Standards No. 130, "Reporting Comprehensive Income" ("SFAS
         130") and Statement of Financial Accounting Standards No. 131,
         "Disclosure about Segments of an Enterprise and Related Information"
         ("SFAS 131").


                                       11

<PAGE>   32


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2.       SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

         SFAS 130 establishes standards for reporting comprehensive income and
         its components in a full set of general purpose financial statements.
         SFAS 130 is effective for the Company as of October 1, 1998 and is
         included in these financial statements.

         SFAS 131 establishes standards for the disclosure of information about
         the Company's operating segments. SFAS 131 is effective for the year
         ending December 31, 1999 and is not included in these financial
         statements.

         Implementation of SFAS 131 will not have an impact on the Company's
         results of operations, financial condition or liquidity.

         In June 1998, the FASB issued Statement of Financial Accounting
         Standards No. 133, "Accounting for Derivative Instruments and Hedging
         Activities" ("SFAS 133"). SFAS 133 addresses the accounting for
         derivative instruments, including certain derivative instruments
         embedded in other contracts, and hedging activities. SFAS 133 was
         postponed by SFAS 137, and now will be effective for the Company as of
         January 1, 2001. Therefore, it is not included in the accompanying
         financial statements. The Company has not completed its analysis of the
         effect of SFAS 133, but management believes that it will not have a
         material impact on the Company's results of operations, financial
         condition or liquidity.

3.       FISCAL YEAR CHANGE

         Effective December 31, 1998, the Company changed its fiscal year end
         from September 30 to December 31. Accordingly, the consolidated
         financial statements include the results of operations and cash flows
         for the three-month transition period ended December 31, 1998. Such
         results are not necessarily indicative of operations for a full year.
         The consolidated financial statements as of and for the three months
         ended December 31, 1998 were originally filed as the Company's
         unaudited Transition Report on Form 10-Q.

         Results for the comparable prior year period are summarized below.

                                                        Three Months Ended
                                                         December 31, 1997
                                                        ------------------
         Investment income                                   59,855,000

         Net investment income                               26,482,000

         Net realized investment gains                       20,935,000

         Total fee income                                    63,984,000

         Pretax income                                       67,654,000

         Net income                                          44,348,000
                                                             ==========


                                       12

<PAGE>   33


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4.       INVESTMENTS

         The amortized cost and estimated fair value of bonds, notes and
         redeemable preferred stocks available for sale by major category
         follow:


<TABLE>
<CAPTION>
                                                                      Estimated
                                                  Amortized              Fair
                                                     Cost                Value
                                                --------------      --------------
<S>                                             <C>                 <C>
         AT DECEMBER 31, 1998:

           Securities of the United States
              Government                        $    6,033,000      $    6,272,000
           Mortgage-backed securities              546,790,000         553,990,000
           Securities of public utilities          208,074,000         205,119,000
           Corporate bonds and notes             2,624,330,000       2,616,073,000
           Redeemable preferred stocks               6,125,000           7,507,000
           Other debt securities                   861,388,000         859,879,000
                                                --------------      --------------

              Total                             $4,252,740,000      $4,248,840,000
                                                ==============      ==============

         AT SEPTEMBER 30, 1998:

           Securities of the United States
              Government                        $   84,377,000      $   88,239,000
           Mortgage-backed securities              569,613,000         584,007,000
           Securities of public utilities          108,431,000         106,065,000
           Corporate bonds and notes               883,890,000         884,209,000
           Redeemable preferred stocks               6,125,000           6,888,000
           Other debt securities                   282,427,000         285,346,000
                                                --------------      --------------

              Total                             $1,934,863,000      $1,954,754,000
                                                ==============      ==============

         AT SEPTEMBER 30, 1997:

           Securities of the United States
              Government                        $   18,496,000      $   18,962,000
           Mortgage-backed securities              636,018,000         649,196,000
           Securities of public utilities           22,792,000          22,893,000
           Corporate bonds and notes               984,573,000       1,012,559,000
           Redeemable preferred stocks               6,125,000           6,681,000
           Other debt securities                   274,481,000         275,903,000
                                                --------------      --------------

              Total                             $1,942,485,000      $1,986,194,000
                                                ==============      ==============
</TABLE>


                                       13

<PAGE>   34


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4.       INVESTMENTS (Continued)

         The amortized cost and estimated fair value of bonds, notes and
         redeemable preferred stocks available for sale by contractual maturity,
         as of December 31, 1998, follow:

<TABLE>
                                                                  Estimated
                                             Amortized               Fair
                                                Cost                Value
                                           --------------      --------------
<S>                                        <C>                 <C>
         Due in one year or less           $  918,639,000      $  918,419,000
         Due after one year through
             five years                     1,547,743,000       1,546,798,000
         Due after five years through
             ten years                        815,959,000         816,689,000
         Due after ten years                  423,609,000         412,944,000
         Mortgage-backed securities           546,790,000         553,990,000
                                           --------------      --------------

             Total                         $4,252,740,000      $4,248,840,000
                                           ==============      ==============
</TABLE>


         Actual maturities of bonds, notes and redeemable preferred stocks will
         differ from those shown above due to prepayments and redemptions.


                                       14


<PAGE>   35


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4.       INVESTMENTS (continued)

         Gross unrealized gains and losses on bonds, notes and redeemable
         preferred stocks available for sale by major category follow:

<TABLE>
<CAPTION>
                                                      Gross            Gross
                                                   Unrealized        Unrealized
                                                      Gains            Losses
                                                  ------------      ------------
<S>                                               <C>               <C>
         AT DECEMBER 31, 1998:

             Securities of the United States
                Government                        $    239,000      $       --
             Mortgage-backed securities              9,398,000        (2,198,000)
             Securities of public utilities            926,000        (3,881,000)
             Corporate bonds and notes              22,227,000       (30,484,000)
             Redeemable preferred stocks             1,382,000              --
             Other debt securities                   2,024,000        (3,533,000)
                                                  ------------      ------------

                Total                             $ 36,196,000      $(40,096,000)
                                                  ============      ============

         AT SEPTEMBER 30, 1998:

             Securities of the United States
                Government                        $  3,862,000      $       --
             Mortgage-backed securities             15,103,000          (709,000)
             Securities of public utilities          2,420,000        (4,786,000)
             Corporate bonds and notes              31,795,000       (31,476,000)
             Redeemable preferred stocks               763,000              --
             Other debt securities                   5,235,000        (2,316,000)
                                                  ------------      ------------

                Total                             $ 59,178,000      $(39,287,000)
                                                  ============      ============

         AT SEPTEMBER 30, 1997:

             Securities of the United States
                Government                        $    498,000      $    (32,000)
             Mortgage-backed securities             14,998,000        (1,820,000)
             Securities of public utilities            141,000           (40,000)
             Corporate bonds and notes              28,691,000          (705,000)
             Redeemable preferred stocks               556,000              --
             Other debt securities                   1,569,000          (147,000)
                                                  ------------      ------------

                Total                             $ 46,453,000      $ (2,744,000)
                                                  ============      ============
</TABLE>


         Gross unrealized gains on equity securities available for sale
         aggregated $10,000, $54,000, and $1,004,000 at December 31, 1998,
         September 30, 1998, and September 30, 1997, respectively. There were no
         unrealized losses at December 31, 1998, September 30, 1998, or
         September 30, 1997.


                                       15

<PAGE>   36


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4.       INVESTMENTS (Continued)

         Gross realized investment gains and losses on sales of investments are
         as follows:


<TABLE>
<CAPTION>
                                                                      Years Ended September 30,
                                    Three Months Ended    --------------------------------------------------
                                     December 31, 1998        1998               1997               1996
                                    ------------------    ------------       ------------       ------------
<S>                                    <C>                <C>                <C>                <C>
         BONDS, NOTES AND
             REDEEMABLE PREFERRED
             STOCKS:
             Realized gains            $  6,669,000       $ 28,086,000       $ 22,179,000       $ 14,532,000
             Realized losses             (5,324,000)        (4,627,000)       (25,310,000)       (10,432,000)

         COMMON STOCKS:
             Realized gains                  12,000            337,000          4,002,000            511,000
             Realized losses                 (9,000)              --             (312,000)        (3,151,000)

         OTHER INVESTMENTS:
             Realized gains                 573,000          8,824,000          2,450,000          1,135,000

         IMPAIRMENT WRITEDOWNS           (1,650,000)       (13,138,000)       (20,403,000)       (15,950,000)
                                       ------------       ------------       ------------       ------------

         Total net realized
             investment gains
             and losses                $    271,000       $ 19,482,000       $(17,394,000)      $(13,355,000)
                                       ============       ============       ============       ============
</TABLE>

         The sources and related amounts of investment income are as follows:

<TABLE>
<CAPTION>
                                                                           Years Ended September 30,
                                       Three Months Ended    --------------------------------------------------
                                        December 31, 1998        1998               1997               1996
                                       ------------------    ------------       ------------       ------------
<S>                                       <C>                <C>                 <C>                 <C>
         Short-term investments           $   4,649,000      $  12,524,000       $  11,780,000       $  10,647,000
         Bonds, notes and
             redeemable preferred
             stocks                          39,660,000        156,140,000         163,038,000         140,387,000
         Mortgage loans                       7,904,000         29,996,000          17,632,000           8,701,000
         Common stocks                             --               34,000              16,000               8,000
         Real estate                             13,000           (467,000)           (296,000)           (196,000)
         Cost-method partnerships               352,000         24,311,000           6,725,000           4,073,000
         Other invested assets                1,700,000           (572,000)         11,864,000           1,011,000
                                          -------------      -------------       -------------       -------------

             Total investment income      $  54,278,000      $ 221,966,000       $ 210,759,000       $ 164,631,000
                                          =============      =============       =============       =============
</TABLE>

         Expenses incurred to manage the investment portfolio amounted to
         $500,000 for the three months ended December 31, 1998, $1,910,000 for
         the year ended September 30, 1998, $2,050,000 for the year ended
         September 30, 1997, and $1,737,000 for the year ended September 30,
         1996, and are included in General and Administrative Expenses in the
         income statement.


                                       16

<PAGE>   37


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4.       INVESTMENTS (Continued)

         At December 31, 1998, the following investments exceeded 10% of the
         Company's consolidated shareholder's equity of $74,703,000:

<TABLE>
<CAPTION>
                                                       Amortized              Fair
                                                         Cost                 Value
                                                    --------------      --------------
<S>                                                    <C>                 <C>
         General Motors Acceptance Corporation         188,908,000         188,953,000
         Export Development Corporation                114,895,000         114,895,000
         Morgan Stanley Dean Witter                    111,838,000         111,837,000
         Lucent Technologies Inc.                       89,901,000          89,901,000
         Duke Energy Corporation                        89,896,000          89,896,000
         International Lease Finance Corp.              84,965,000          84,965,000
         Ford Motor Corporation                         79,973,000          79,976,000
         Gannet Company                                 79,869,000          79,869,000
         Exxon Asset Management Co.                     78,935,000          78,935,000
         General Electric Capital Corp.                 78,008,000          78,008,000
         Merrill Lynch & Company                        75,040,000          75,042,000
         Koch Industries                                74,939,000          74,939,000
         Government of Canada                           74,928,000          74,927,000
                                                    --------------      --------------

             Total                                  $1,222,095,000      $1,222,143,000
                                                    ==============      ==============
</TABLE>

         At December 31, 1998, mortgage loans were collateralized by properties
         located in 29 states, with loans totaling approximately 20% of the
         aggregate carrying value of the portfolio secured by properties located
         in California and approximately 14% by properties located in New York.
         No more than 8% of the portfolio was secured by properties in any other
         single state.

         At December 31, 1998, bonds, notes and redeemable preferred stocks
         included $241,769,000 of bonds and notes not rated investment grade.
         The Company had no material concentrations of non-investment-grade
         assets at December 31, 1998.

         At December 31, 1998, the carrying value of investments in default as
         to the payment of principal or interest was $3,168,000, composed of
         $2,500,000 of bonds and $668,000 of mortgage loans. Such nonperforming
         investments had an estimated fair value of $1,918,000.

         As a component of its asset and liability management strategy, the
         Company utilizes Swap Agreements to match assets more closely to
         liabilities. Swap Agreements are agreements to exchange with a
         counterparty interest rate payments of differing character (for
         example, variable-rate payments exchanged for fixed-rate payments)
         based on an underlying principal balance (notional principal) to hedge
         against interest rate changes. The Company typically utilizes Swap
         Agreements to create a hedge that effectively converts floating-rate
         assets and liabilities to fixed-rate instruments. At December 31, 1998,
         the Company had one outstanding Swap Agreement with a notional
         principal amount of $21,538,000, which matures in December 2024. The
         net interest paid amounted to $54,000 for the three months ended
         December 31, 1998, $278,000 for the year ended September 30, 1998, and
         $125,000 for the year ended September 30, 1997, and is included in
         Interest Expense on Guaranteed Investment Contracts in the income
         statement. There were no outstanding Swap Agreements at September 30,
         1996.


                                       17

<PAGE>   38


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4.       INVESTMENTS (Continued)

         At December 31, 1998, $5,305,000 of bonds, at amortized cost, were on
         deposit with regulatory authorities in accordance with statutory
         requirements.

5.       FAIR VALUE OF FINANCIAL INSTRUMENTS

         The following estimated fair value disclosures are limited to
         reasonable estimates of the fair value of only the Company's financial
         instruments. The disclosures do not address the value of the Company's
         recognized and unrecognized nonfinancial assets (including its real
         estate investments and other invested assets except for cost-method
         partnerships) and liabilities or the value of anticipated future
         business. The Company does not plan to sell most of its assets or
         settle most of its liabilities at these estimated fair values.

         The fair value of a financial instrument is the amount at which the
         instrument could be exchanged in a current transaction between willing
         parties, other than in a forced or liquidation sale. Selling expenses
         and potential taxes are not included. The estimated fair value amounts
         were determined using available market information, current pricing
         information and various valuation methodologies. If quoted market
         prices were not readily available for a financial instrument,
         management determined an estimated fair value. Accordingly, the
         estimates may not be indicative of the amounts the financial
         instruments could be exchanged for in a current or future market
         transaction.

         The following methods and assumptions were used to estimate the fair
         value of each class of financial instruments for which it is
         practicable to estimate that value:

         CASH AND SHORT-TERM INVESTMENTS: Carrying value is considered to be a
         reasonable estimate of fair value.

         BONDS, NOTES AND REDEEMABLE PREFERRED STOCKS: Fair value is based
         principally on independent pricing services, broker quotes and other
         independent information.

         MORTGAGE LOANS: Fair values are primarily determined by discounting
         future cash flows to the present at current market rates, using
         expected prepayment rates.

         COMMON STOCKS: Fair value is based principally on independent pricing
         services, broker quotes and other independent information.

         COST-METHOD PARTNERSHIPS: Fair value of limited partnerships accounted
         for by using the cost method is based upon the fair value of the net
         assets of the partnerships as determined by the general partners.

         VARIABLE ANNUITY ASSETS HELD IN SEPARATE ACCOUNTS: Variable annuity
         assets are carried at the market value of the underlying securities.

         RESERVES FOR FIXED ANNUITY CONTRACTS: Deferred annuity contracts are
         assigned a fair value equal to current net surrender value. Annuitized


                                       18

<PAGE>   39


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

5.       FAIR VALUE OF FINANCIAL INSTRUMENTS (Continued)

         contracts are valued based on the present value of future cash flows at
         current pricing rates.

         RESERVES FOR UNIVERSAL LIFE INSURANCE CONTRACTS: Universal life and
         single premium life contracts are assigned a fair value equal to
         current net surrender value.

         RESERVES FOR GUARANTEED INVESTMENT CONTRACTS: Fair value is based on
         the present value of future cash flows at current pricing rates and is
         net of the estimated fair value of a hedging Swap Agreement, determined
         from independent broker quotes.

         RECEIVABLE FROM/PAYABLE TO BROKERS FOR PURCHASES OF SECURITIES: Such
         obligations represent net transactions of a short-term nature for which
         the carrying value is considered a reasonable estimate of fair value.

         VARIABLE ANNUITY LIABILITIES RELATED TO SEPARATE ACCOUNTS: Fair values
         of contracts in the accumulation phase are based on net surrender
         values. Fair values of contracts in the payout phase are based on the
         present value of future cash flows at assumed investment rates.

         SUBORDINATED NOTES PAYABLE TO PARENT: Fair value is estimated based on
         the quoted market prices for similar issues.


                                       19

<PAGE>   40


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

5.       FAIR VALUE OF FINANCIAL INSTRUMENTS (Continued)

         The estimated fair values of the Company's financial instruments at
         December 31, 1998, September 30, 1998 and 1997, compared with their
         respective carrying values, are as follows:

<TABLE>
<CAPTION>
                                                          Carrying                 Fair
                                                            Value                 Value
                                                       ---------------      ---------------
<S>                                                    <C>                  <C>
         DECEMBER 31, 1998:

         ASSETS:
             Cash and short-term investments           $ 3,303,454,000      $ 3,303,454,000
             Bonds, notes and redeemable
                preferred stocks                         4,248,840,000        4,248,840,000
             Mortgage loans                                388,780,000          411,230,000
             Common stocks                                   1,419,000            1,419,000
             Cost-method partnerships                        4,577,000           12,802,000
             Variable annuity assets held in
                separate accounts                       13,767,213,000       13,767,213,000
             Receivable from brokers for sales
                of securities                               22,826,000           22,826,000

         LIABILITIES:
             Reserves for fixed annuity contracts        5,500,157,000        5,437,045,000
             Reserves for universal life
                insurance contracts                      2,339,194,000        2,339,061,000
             Reserves for guaranteed investment
                contracts                                  306,461,000          306,461,000
             Variable annuity liabilities related
                to separate accounts                    13,767,213,000       13,287,434,000
             Subordinated notes payable to Parent          209,367,000          210,587,000
                                                       ===============      ===============

         SEPTEMBER 30, 1998:

         ASSETS:
             Cash and short-term investments           $   333,735,000      $   333,735,000
             Bonds, notes and redeemable
                preferred stocks                         1,954,754,000        1,954,754,000
             Mortgage loans                                391,448,000          415,981,000
             Common stocks                                     169,000              169,000
             Cost-method partnerships                        4,403,000           12,744,000
             Variable annuity assets held in
                separate accounts                       11,133,569,000       11,133,569,000
             Receivable from brokers for sales
                of securities                               23,904,000           23,904,000

         LIABILITIES:
             Reserves for fixed annuity contracts        2,189,272,000        2,116,874,000
             Reserves for guaranteed investment
                contracts                                  282,267,000          282,267,000
             Payable to brokers for purchases
                of securities                               50,957,000           50,957,000
             Variable annuity liabilities related
                to separate accounts                    11,133,569,000       10,696,607,000
             Subordinated notes payable to Parent           39,182,000           40,550,000
                                                       ===============      ===============
</TABLE>


                                       20

<PAGE>   41


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

5.       FAIR VALUE OF FINANCIAL INSTRUMENTS (Continued)

<TABLE>
<CAPTION>
                                                          Carrying              Fair
                                                            Value               Value
                                                       --------------      --------------
<S>                                                    <C>                 <C>
         SEPTEMBER 30, 1997:

         ASSETS:
             Cash and short-term investments           $  113,580,000      $  113,580,000
             Bonds, notes and redeemable
                preferred stocks                        1,986,194,000       1,986,194,000
             Mortgage loans                               339,530,000         354,495,000
             Common stocks                                  1,275,000           1,275,000
             Cost-method partnerships                      46,880,000          84,186,000
             Variable annuity assets held in
                separate accounts                       9,343,200,000       9,343,200,000
             Receivable from brokers for sales
                of securities                               2,290,000           2,290,000

         LIABILITIES:
             Reserves for fixed annuity contracts       2,098,803,000       2,026,258,000
             Reserves for guaranteed investment
                contracts                                 295,175,000         295,175,000
             Payable to brokers for purchases
                of securities                               2,553,000           2,553,000
             Variable annuity liabilities related
                to separate accounts                    9,343,200,000       9,077,200,000
             Subordinated notes payable to Parent          36,240,000          37,393,000
                                                       ==============      ==============
</TABLE>

6.       SUBORDINATED NOTES PAYABLE TO PARENT

         On December 30, 1998, the Company received cash totaling $170,436,000
         in exchange for issuance of a surplus note (the "Note") payable to its
         immediate parent, SunAmerica Life Insurance Company (the "Parent"),
         which Note has been included in Subordinated Notes Payable to
         Affiliates in the accompanying consolidated balance sheet. Interest on
         this note accrues at a rate of 7%.

         Subordinated notes and accrued interest payable to affiliates totaled
         $209,367,000 at interest rates ranging from 7% to 9% at December 31,
         1998, and require principal payments of $23,060,000 in 1999, $5,400,000
         in 2000, $10,000,000 in 2001 and $170,436,000 thereafter. On June 30,
         1999, the Parent cancelled the Note and funds received were
         reclassified to Additional Paid-in Capital.

7.       REINSURANCE

         On August 11, 1998, the Company entered into a modified coinsurance
         transaction, approved by the Arizona Department of Insurance, which
         involved the ceding of approximately $5,000,000,000 of variable
         annuities to ANLIC Insurance Company (Cayman), a Cayman Islands stock
         life insurance company, effective December 31, 1997. As a part of this
         transaction, the Company received cash amounting to approximately
         $188,700,000, and recorded a corresponding reduction of DAC related to
         the coinsured annuities. As payments were made to the reinsurer, the
         reduction of DAC was relieved. Certain expenses related to this
         transaction were charged directly to DAC amortization in the income
         statement. The net effect of this transaction in the income statement
         is not material.


                                       21

<PAGE>   42


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

7.       REINSURANCE (Continued)

         On December 31, 1998, the Company recaptured this business. As part of
         this recapture, the Company paid cash of $170,436,000 and recorded an
         increase in DAC of $167,202,000 with the balance of $3,234,000 being
         recorded as DAC amortization in the income statement.

         On December 31, 1998, the Company acquired the individual life business
         and the individual and group annuity business of MBL Life Assurance
         Corporation ("MBL Life"), via a 100% coinsurance transaction, for a
         cash purchase price of $128,420,000. As part of this transaction, the
         Company acquired assets having an aggregate fair value of
         $5,718,227,000, composed primarily of invested assets totaling
         $5,715,010,000. Liabilities assumed in this acquisition totaled
         $5,831,266,000, including $3,460,503,000 of fixed annuity reserves,
         $2,308,742,000 of universal life reserves and $24,011,000 of guaranteed
         investment contract reserves. Reserves for universal life contracts are
         based on fund value. The excess of the purchase price over the fair
         value of net assets received amounted to $113,039,000 and is included
         in Deferred Acquisition Costs in the accompanying consolidated balance
         sheet.

         This business was assumed from MBL life subject to existing reinsurance
         ceded agreements. At December 31, 1998, the maximum retention on any
         single life was $2,000,000, and a total credit of $5,057,000 was taken
         against the life insurance reserves, representing predominantly yearly
         renewable term reinsurance. In order to limit even further the exposure
         to loss on any single insured and to recover an additional portion of
         the benefits paid over such limits, the Company entered into a
         reinsurance treaty effective January 1, 1999 under which the Company
         retains no more than $100,000 of risk on any one insured life. With
         respect to these coinsurance agreements, the Company could become
         liable for all obligations of the reinsured policies if the reinsurers
         were to become unable to meet the obligations assumed under the
         respective reinsurance agreements.

         Included in the block of business acquired from MBL Life is
         approximately $250,000,000 of individual life business and $500,000,000
         of group annuity business whose contract owners are residents of New
         York State ("the New York Business"). Approximately six months
         subsequent to completion of the transaction, the New York Business will
         be acquired by the Company's New York affiliate, First SunAmerica Life
         Insurance Company ("FSA"), via an assumption reinsurance agreement, and
         the remainder of the business will be acquired by the Company via an
         assumption reinsurance agreement with MBL Life, which will supersede
         the coinsurance agreement. The $128,420,000 purchase price will be
         allocated between the Company and its affiliate based on the estimated
         future gross profits of the two blocks of business.

8.       CONTINGENT LIABILITIES

         The Company has entered into two agreements in which it has provided
         liquidity support for certain short-term securities of municipalities
         by agreeing to purchase such securities in the event there is no other
         buyer in the short-term marketplace. In return the Company receives a
         fee. The maximum liability under these guarantees at December 31,


                                       22

<PAGE>   43


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

8.       CONTINGENT LIABILITIES (Continued)

         1998 is $210,000,000. Management does not anticipate any material
         future losses with respect to these liquidity support facilities. An
         additional $60,000,000 has been committed to investments in the process
         of being funded or to be available in the case of certain natural
         disasters, for which the Company receives a fee.

         The Company is involved in various kinds of litigation common to its
         businesses. These cases are in various stages of development and, based
         on reports of counsel, management believes that provisions made for
         potential losses relating to such litigation are adequate and any
         further liabilities and costs will not have a material adverse impact
         upon the Company's financial position, results of operations or cash
         flows.


                                       23


<PAGE>   44


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

9.       SHAREHOLDER'S EQUITY

         The Company is authorized to issue 4,000 shares of its $1,000 par value
         Common Stock. At December 31, 1998 and September 30, 1998, 3,511 shares
         were outstanding.

         Changes in shareholder's equity are as follows:


<TABLE>
<CAPTION>
                                                                         Years Ended September 30,
                                        Three Months Ended     -----------------------------------------------------
                                         December 31, 1998          1998               1997                 1996
                                        ------------------     -------------       -------------       -------------
<S>                                        <C>                 <C>                 <C>                 <C>
         ADDITIONAL PAID-IN CAPITAL:
             Beginning balances            $ 308,674,000       $ 308,674,000       $ 280,263,000       $ 252,876,000
             Capital contributions
                received                      70,000,000                --            28,411,000          27,387,000
                                           -------------       -------------       -------------       -------------

         Ending balances                   $ 378,674,000       $ 308,674,000       $ 308,674,000       $ 280,263,000
                                           =============       =============       =============       =============

         RETAINED EARNINGS:
             Beginning balances            $ 332,069,000       $ 244,628,000       $ 207,002,000       $ 191,346,000
             Net income                       34,391,000         138,641,000          63,126,000          45,056,000
             Dividend paid                          --           (51,200,000)        (25,500,000)        (29,400,000)
                                           -------------       -------------       -------------       -------------

         Ending balances                   $ 366,460,000       $ 332,069,000       $ 244,628,000       $ 207,002,000
                                           =============       =============       =============       =============

         ACCUMULATED OTHER
             COMPREHENSIVE INCOME
             (LOSS):
                Beginning balances         $   8,415,000       $  18,405,000       $  (5,521,000)      $  (5,673,000)
                Change in net
                   unrealized gains
                   (losses) on debt
                   securities
                   available for sale        (23,791,000)        (23,818,000)         57,463,000          (2,904,000)
                Change in net
                   unrealized gains
                   (losses) on equity
                   securities
                   available for sale            (44,000)           (950,000)            (55,000)          3,538,000
                Change in adjustment
                   to deferred
                   acquisition costs           8,400,000           9,400,000         (20,600,000)           (400,000)
                Tax effects of net
                   changes                     5,401,000           5,378,000         (12,882,000)            (82,000)
                                           -------------       -------------       -------------       -------------

         Ending balances                   $  (1,619,000)      $   8,415,000       $  18,405,000       $  (5,521,000)
                                           =============       =============       =============       =============
</TABLE>


                                       24

<PAGE>   45


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

9.       SHAREHOLDER'S EQUITY (Continued)

         Dividends that the Company may pay to its shareholder in any year
         without prior approval of the Arizona Department of Insurance are
         limited by statute. The maximum amount of dividends which can be paid
         to shareholders of insurance companies domiciled in the state of
         Arizona without obtaining the prior approval of the Insurance
         Commissioner is limited to the lesser of either 10% of the preceding
         year's statutory surplus or the preceding year's statutory net gain
         from operations. Dividends in the amounts of $51,200,000, $25,500,000
         and $29,400,000 were paid on June 4, 1998, April 1, 1997 and March 18,
         1996, respectively. No dividends were paid in the three months ended
         December 31, 1998.

         Under statutory accounting principles utilized in filings with
         insurance regulatory authorities, the Company's net loss for the year
         ended December 31, 1998 was $98,766,000. The statutory net income for
         the year ended December 31, 1997 totaled $74,407,000, and the statutory
         net income for the year ended December 31, 1996 was $27,928,000. The
         Company's statutory capital and surplus totaled $443,394,000 at
         December 31, 1998, $537,542,000 at September 30, 1998, $567,979,000 at
         December 31, 1997 and $311,176,000 at December 31, 1996.

10.      INCOME TAXES

         The components of the provisions for federal income taxes on pretax
         income consist of the following:


<TABLE>
<CAPTION>
                                                    Net Realized
                                                     Investment
                                                   Gains (Losses)       Operations            Total
                                                   --------------      ------------       ------------
<S>                                                 <C>                <C>                <C>
         Three months ended December 31, 1998:

         Currently payable                          $    740,000       $  3,421,000       $  4,161,000
         Deferred                                       (620,000)        16,565,000         15,945,000
                                                    ------------       ------------       ------------

             Total income tax expense               $    120,000       $ 19,986,000       $ 20,106,000
                                                    ============       ============       ============

         Year ended September 30, 1998:

         Currently payable                          $  4,221,000       $ 32,743,000       $ 36,964,000
         Deferred                                       (550,000)        34,637,000         34,087,000
                                                    ------------       ------------       ------------

             Total income tax expense               $  3,671,000       $ 67,380,000       $ 71,051,000
                                                    ============       ============       ============

         Year ended September 30, 1997:

         Currently payable                          $ (3,635,000)      $ 50,828,000       $ 47,193,000
         Deferred                                     (2,258,000)       (13,766,000)       (16,024,000)
                                                    ------------       ------------       ------------

             Total income tax expense               $ (5,893,000)      $ 37,062,000       $ 31,169,000
                                                    ============       ============       ============

         Year ended September 30, 1996:

         Currently payable                          $  5,754,000       $ 21,849,000       $ 27,603,000
         Deferred                                    (10,347,000)         6,996,000         (3,351,000)
                                                    ------------       ------------       ------------

             Total income tax expense               $ (4,593,000)      $ 28,845,000       $ 24,252,000
                                                    ============       ============       ============
</TABLE>


                                       25

<PAGE>   46


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

10.      INCOME TAXES (Continued)

         Income taxes computed at the United States federal income tax rate of
         35% and income taxes provided differ as follows:

<TABLE>
<CAPTION>
                                                                            Years Ended September 30,
                                         Three Months Ended    ---------------------------------------------------
                                          December 31, 1998        1998              1997                1996
                                         ------------------    ------------       ------------       ------------
<S>                                         <C>                <C>                <C>                <C>
         Amount computed at
             statutory rate                 $ 19,074,000       $ 73,392,000       $ 33,003,000       $ 24,258,000
         Increases (decreases)
             resulting from:
                Amortization of
                   differences between
                   book and tax bases
                   of net assets
                   acquired                      146,000            460,000            666,000            464,000
                State income taxes,
                   net of federal tax
                   benefit                     1,183,000          5,530,000          1,950,000          2,070,000
                Dividends-received
                   deduction                    (345,000)        (7,254,000)        (4,270,000)        (2,357,000)
                Tax credits                                      (1,296,000)          (318,000)          (257,000)
                Other, net                        48,000            219,000            138,000             74,000
                                            ------------       ------------       ------------       ------------

                Total income tax
                   expense                  $ 20,106,000       $ 71,051,000       $ 31,169,000       $ 24,252,000
                                            ============       ============       ============       ============
</TABLE>


         For United States federal income tax purposes, certain amounts from
         life insurance operations are accumulated in a memorandum
         policyholders' surplus account and are taxed only when distributed to
         shareholders or when such account exceeds prescribed limits. The
         accumulated policyholders' surplus was $14,300,000 at December 31,
         1998. The Company does not anticipate any transactions which would
         cause any part of this surplus to be taxable.


                                       26

<PAGE>   47


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

10.      INCOME TAXES (Continued)

         Deferred income taxes reflect the net tax effects of temporary
         differences between the carrying amounts of assets and liabilities for
         financial reporting purposes and the amounts used for income tax
         reporting purposes. The significant components of the liability for
         Deferred Income Taxes are as follows:

<TABLE>
<CAPTION>
                                                                         At September 30,
                                              December 31,       ---------------------------------
                                                  1998               1998                1997
                                             -------------       -------------       -------------
<S>                                          <C>                 <C>                 <C>
         DEFERRED TAX LIABILITIES:
         Investments                         $  18,174,000       $  17,643,000       $  13,160,000
         Deferred acquisition costs            222,943,000         223,392,000         154,949,000
         State income taxes                      3,143,000           2,873,000           1,777,000
         Other liabilities                      13,906,000             144,000                --
         Net unrealized gains on debt
             and equity securities
             available for sale                       --             4,531,000           9,910,000
                                             -------------       -------------       -------------

             Total deferred tax
                liabilities                    258,166,000         248,583,000         179,796,000
                                             -------------       -------------       -------------

         DEFERRED TAX ASSETS:
         Contractholder reserves              (148,587,000)       (149,915,000)       (108,090,000)
         Guaranty fund assessments              (2,935,000)         (2,910,000)         (2,707,000)
         Other assets                                 --                  --            (1,952,000)
         Net unrealized losses on
             debt and equity securities
             available for sale                   (872,000)               --                  --
                                             -------------       -------------       -------------

             Total deferred tax assets        (152,394,000)       (152,825,000)       (112,749,000)
                                             -------------       -------------       -------------

             Deferred income taxes           $ 105,772,000       $  95,758,000       $  67,047,000
                                             =============       =============       =============
</TABLE>


11.      ADOPTION OF NEW ACCOUNTING STANDARD

         Effective October 1, 1998, the Company adopted Statement of Financial
         Accounting Standards No. 130, "Reporting Comprehensive Income" ("SFAS
         130") which requires the reporting of comprehensive income in addition
         to net income from operations. Comprehensive income is a more inclusive
         financial reporting methodology that includes disclosure of certain
         financial information that historically has not been recognized in the
         calculation of net income. The adoption of SFAS 130 did not have an
         impact on the Company's results of operations, financial condition or
         liquidity. Comprehensive income amounts for the prior year are
         disclosed to conform to the current year's presentation.


                                       27

<PAGE>   48


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

11.      ADOPTION OF NEW ACCOUNTING STANDARD (Continued)

         The before tax, after tax, and tax benefit (expense) amounts for each
         component of the increase or decrease in unrealized losses or gains on
         debt and equity securities available for sale for both the current and
         prior periods are summarized below:

<TABLE>
<CAPTION>
                                                                     Tax Benefit
                                                   Before Tax         (Expense)         Net of Tax
                                                  ------------       ------------       ------------
<S>                                               <C>                <C>                <C>
         THREE MONTHS ENDED DECEMBER 31,
         1998:

         Net unrealized losses on debt
             and equity securities available
             for sale identified in the
             current period                       $(24,345,000)      $  8,521,000       $(15,824,000)

         Increase in deferred acquisition
             cost adjustment identified in
             the current period                      8,579,000         (3,004,000)         5,575,000
                                                  ------------       ------------       ------------

         Subtotal                                  (15,766,000)         5,517,000        (10,249,000)
                                                  ------------       ------------       ------------

         Reclassification adjustment for:
             Net realized losses included
                in net income                          510,000           (179,000)           331,000
             Related change in deferred
                acquisition costs                     (179,000)            63,000           (116,000)
                                                  ------------       ------------       ------------
             Total reclassification
                adjustment                             331,000           (116,000)           215,000
                                                  ------------       ------------       ------------

         Total other comprehensive loss           $(15,435,000)      $  5,401,000       $(10,034,000)
                                                  ============       ============       ============

         YEAR ENDED SEPTEMBER 30, 1998:

         Net unrealized gains on debt
             and equity securities available
             for sale identified in the
             current period                       $(10,281,000)      $  3,598,000       $ (6,683,000)

         Decrease in deferred acquisition
             cost adjustment identified in
             the current period                      4,086,000         (1,430,000)         2,656,000
                                                  ------------       ------------       ------------

         Subtotal                                   (6,195,000)         2,168,000         (4,027,000)
                                                  ------------       ------------       ------------

         Reclassification adjustment for:
             Net realized gains included
                in net income                      (14,487,000)         5,070,000         (9,417,000)
             Related change in deferred
                acquisition costs                    5,314,000         (1,860,000)         3,454,000
                                                  ------------       ------------       ------------
             Total reclassification
                adjustment                          (9,173,000)         3,210,000         (5,963,000)
                                                  ------------       ------------       ------------

         Total other comprehensive loss           $(15,368,000)      $  5,378,000       $ (9,990,000)
                                                  ============       ============       ============
</TABLE>


                                       28

<PAGE>   49


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

11.      ADOPTION OF NEW ACCOUNTING STANDARD (Continued)


<TABLE>
<CAPTION>
                                                                     Tax Benefit
                                                   Before Tax         (Expense)          Net of Tax
                                                  ------------       ------------       ------------
<S>                                               <C>                <C>                <C>
         YEAR ENDED SEPTEMBER 30,1997:

         Net unrealized losses on debt
             and equity securities available
             for sale identified in the
             current period                       $ 40,575,000       $(14,201,000)      $ 26,374,000

         Increase in deferred acquisition
             cost adjustment identified in
             the current period                    (15,031,000)         5,262,000         (9,769,000)
                                                  ------------       ------------       ------------

         Subtotal                                   25,544,000         (8,939,000)        16,605,000
                                                  ------------       ------------       ------------

         Reclassification adjustment for:
             Net realized losses included
                in net income                       16,832,000         (5,891,000)        10,941,000
             Related change in deferred
                acquisition costs                   (5,569,000)         1,949,000         (3,620,000)
                                                  ------------       ------------       ------------
             Total reclassification
                adjustment                          11,263,000         (3,942,000)         7,321,000
                                                  ------------       ------------       ------------

         Total other comprehensive
             income                               $ 36,807,000       $(12,881,000)      $ 23,926,000
                                                  ============       ============       ============

         YEAR ENDED SEPTEMBER 30, 1996:

         Net unrealized gains on debt
             and equity securities available
             for sale identified in the
             current period                       $(26,189,000)      $  9,166,000       $(17,023,000)

         Decrease in deferred acquisition
             cost adjustment identified in
             the current period                      8,858,000         (3,100,000)         5,758,000
                                                  ------------       ------------       ------------

         Subtotal                                  (17,331,000)         6,066,000        (11,265,000)
                                                  ------------       ------------       ------------

         Reclassification adjustment for:
             Net realized gains included
                in net income                       26,823,000         (9,388,000)        17,435,000
             Related change in deferred
                acquisition costs                   (9,258,000)         3,240,000         (6,018,000)
                                                  ------------       ------------       ------------
             Total reclassification
                adjustment                          17,565,000         (6,148,000)        11,417,000
                                                  ------------       ------------       ------------

         Total other comprehensive
             income                               $    234,000       $    (82,000)      $    152,000
                                                  ============       ============       ============
</TABLE>


                                       29

<PAGE>   50


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

12.      RELATED-PARTY MATTERS

         The Company pays commissions to five affiliated companies: SunAmerica
         Securities, Inc.; Advantage Capital Corp.; Financial Services Corp.;
         Sentra Securities Corp.; and Spelman & Co. Inc. Commissions paid to
         these broker-dealers totaled $6,977,000 in the three months ended
         December 31, 1998, and $32,946,000, $25,492,000, and $16,906,000 in the
         years ended September 30, 1998, 1997 and 1996, respectively. These
         broker-dealers, when combined with the Company's wholly owned
         broker-dealer, represent a significant portion of the Company's
         business, amounting to approximately 35.6%, 33.6%, 36.1%, and 38.3% of
         premiums in the three months ended December 31, 1998, and the years
         ended September 30, 1998, 1997, and 1996, respectively. The Company
         also sells its products through unaffiliated broker-dealers, the
         largest two of which represented approximately 14.7% and 9.4% of
         premiums in the three months ended December 31, 1998, 17.3% and 8.4% of
         premiums in the year ended September 30, 1998, 19.2% and 10.1% in the
         year ended September 30, 1997, and 19.7% and 10.2% in the year ended
         September 30, 1996, respectively.

         The Company purchases administrative, investment management,
         accounting, marketing and data processing services from SunAmerica
         Financial, whose purpose is to provide services to the Company and its
         affiliates. Amounts paid for such services totaled $21,593,000 for the
         three months ended December 31, 1998, $84,975,000 for the year ended
         September 30, 1998, $86,116,000 for the year ended September 30, 1997
         and $65,351,000 for the year ended September 30, 1996. The marketing
         component of such costs during these periods amounted to $9,906,000,
         $39,482,000, $31,968,000 and $17,442,000, respectively, and are
         deferred and amortized as part of Deferred Acquisition Costs. The other
         components of such costs are included in General and Administrative
         Expenses in the income statement.

         At December 31, 1998, the Company held bonds with a fair value of
         $84,965,000 which were issued by its affiliate, International Lease
         Finance Corp. The amortized cost of these bonds is equal to the fair
         value.

         For the three months ended December 31, 1998, the Company made no
         purchases or sales of invested assets to the Parent or its affiliates.

         During the year ended September 30, 1998, the Company sold various
         invested assets to the Parent for cash equal to their current market
         value of $64,431,000. The Company recorded a net gain aggregating
         $16,388,000 on such transactions.

         During the year ended September 30, 1998, the Company purchased certain
         invested assets from the Parent, SunAmerica Life Insurance Company and
         CalAmerica Life Insurance Company for cash equal to their current
         market value, which aggregated $20,666,000, $10,468,000 and $61,000,
         respectively.

         During the year ended September 30, 1997, the Company sold various
         invested assets to SunAmerica Life Insurance Company and to CalAmerica
         Life Insurance Company for cash equal to their current market value of
         $15,776,000 and $15,000, respectively. The Company recorded a net gain
         aggregating $276,000 on such transactions.


                                       30

<PAGE>   51


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

12.      RELATED-PARTY MATTERS (Continued)

         During the year ended September 30, 1997, the Company purchased certain
         invested assets from SunAmerica Life Insurance Company and CalAmerica
         Life Insurance Company for cash equal to their current market value of
         $8,717,000 and $284,000, respectively.

         During the year ended September 30, 1996, the Company sold various
         invested assets to the Parent and to SunAmerica Life Insurance Company
         for cash equal to their current market value of $274,000 and
         $47,321,000, respectively. The Company recorded a net loss aggregating
         $3,000 on such transactions.

         During the year ended September 30, 1996, the Company purchased certain
         invested assets from SunAmerica Life Insurance Company for cash equal
         to their current market value, which aggregated $28,379,000.

13.      BUSINESS SEGMENTS

         Summarized data for the Company's business segments follow:

<TABLE>
<CAPTION>
                                                                    Total
                                                                 depreciation
                                                                     and
                                                 Total           amortization           Pretax                 Total
                                                revenues           expense              income                assets
                                              ------------       ------------        ------------         ---------------
<S>                                           <C>                 <C>                <C>                  <C>
         THREE MONTHS ENDED
         DECEMBER 31, 1998:
         Annuity operations                   $103,626,000        $23,236,000        $ 45,962,000         $22,982,323,000
         Broker-dealer
             operations                         11,279,000            561,000           4,444,000              59,537,000
         Asset management
             operations                         22,974,000          4,204,000           4,091,000             104,473,000
                                              ------------        -----------        ------------         ---------------

         Total                                $137,879,000        $28,001,000        $ 54,497,000         $23,146,333,000
                                              ============        ===========        ============         ===============

         YEAR ENDED
         SEPTEMBER 30, 1998:
         Annuity operations                   $443,407,000        $60,731,000        $178,120,000         $14,389,922,000
         Broker-dealer
             operations                         47,363,000          1,770,000          22,401,000              55,870,000
         Asset management
             operations                         41,040,000         14,780,000           9,171,000             104,476,000
                                              ------------        -----------        ------------         ---------------

         Total                                $531,810,000        $77,281,000        $209,692,000         $14,550,268,000
                                              ============        ===========        ============         ===============

         YEAR ENDED
         SEPTEMBER 30, 1997:
         Annuity operations                   $332,845,000        $55,675,000        $ 74,792,000         $12,440,311,000
         Broker-dealer
             operations                         38,005,000            689,000          16,705,000              51,400,000
         Asset management
             operations                         35,661,000         16,357,000           2,798,000              81,518,000
                                              ------------        -----------        ------------         ---------------

         Total                                $406,511,000        $72,721,000        $ 94,295,000         $12,573,229,000
                                              ============        ===========        ============         ===============

         YEAR ENDED
         SEPTEMBER 30, 1996:
         Annuity operations                   $256,681,000        $43,974,000        $ 53,827,000         $ 9,092,770,000
         Broker-dealer
             operations                         31,053,000            449,000          13,033,000              37,355,000
         Asset management
             operations                         33,047,000         18,295,000           2,448,000              74,410,000
                                              ------------        -----------        ------------         ---------------

         Total                                $320,781,000        $62,718,000        $ 69,308,000         $ 9,204,535,000
                                              ============        ===========        ============         ===============
</TABLE>


                                       31


<PAGE>   52


                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

14.      SUBSEQUENT EVENTS

         On June 30, 1999, the Parent cancelled the $170,436,000 Note and funds
         received were reclassified to Additional Paid-in Capital. Also on June
         30, 1999, the Parent forgave the total interest earned on the Note of
         $4,971,000.

         On July 1, 1999, the New York Business acquired from MBL Life was
         transferred to FSA via an assumption reinsurance agreement and the
         remainder of the business converted to assumption reinsurance, which
         superseded the coinsurance arrangement. As part of this transfer,
         invested assets equal to $675,303,000, life reserves equal to
         $282,947,000, group pension reserves equal to $404,318,000, and other
         net assets of $11,962,000 were transferred to FSA. The $128,420,000
         purchase price was allocated between the Company and FSA based on the
         estimated future gross profits of the two blocks of business. The
         portion allocated to FSA was $10,000,000.

         As of August 1, 1999, the Company ceded $6,444,871,000 billion of
         variable annuity liabilities through a modified coinsurance transaction
         to ANLIC Insurance Company (Hawaii). As part of this transaction, the
         Company received $150,000,000 on September 9, 1999, which was credited
         to Deferred Amortization Costs in the balance sheet to eliminate the
         unamortized costs previously deferred with respect to the ceded
         business.

         On September 9, 1999, the Company paid $170,500,000 to its Parent as a
         return of capital. On September 14, 1999, the Parent contributed
         additional capital of $54,250,000 to the Company.


                                       32
<PAGE>   53

                       REPORT OF INDEPENDENT ACCOUNTANTS

To the Board of Directors and Shareholder of
Anchor National Life Insurance Company

In our opinion, the accompanying consolidated balance sheet and the related
consolidated income statement and statement of cash flows present fairly, in all
material respects, the financial position of Anchor National Life Insurance
Company and its subsidiaries (the "Company")at September 30, 1998 and 1997, and
the results of their operations and their cash flows for each of the three years
in the period ended September 30, 1998, in conformity with generally accepted
accounting principles. These financial statements are the responsibility of the
Company's management; our responsibility is to express an opinion on these
financial statements based on our audits. We conducted our audits of these
statements in accordance with generally accepted auditing standards which
require that we plan and perform the audit to obtain reasonable assurance about
whether the financial statements are free of material misstatement. An audit
includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements, assessing the accounting principles
used and significant estimates made by management, and evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for the opinion expressed above.

PricewaterhouseCoopers LLP
Los Angeles, California
November 9, 1998

                                       33
<PAGE>   54

                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                           CONSOLIDATED BALANCE SHEET

<TABLE>
<CAPTION>
                                                                       AT SEPTEMBER 30,
                                                              ----------------------------------
                                                                   1998               1997
                                                              ---------------    ---------------
<S>                                                           <C>                <C>
ASSETS
Investments:
  Cash and short-term investments...........................  $   333,735,000    $   113,580,000
  Bonds, notes and redeemable preferred stocks available for
     sale, at fair value (amortized cost: 1998,
     $1,934,863,000; 1997, $1,942,485,000)..................    1,954,754,000      1,986,194,000
  Mortgage loans............................................      391,448,000        339,530,000
  Common stocks available for sale, at fair value (cost:
     1998, $115,000; 1997, $271,000)........................          169,000          1,275,000
  Real estate...............................................       24,000,000         24,000,000
  Other invested assets.....................................       30,636,000        143,722,000
                                                              ---------------    ---------------
          Total investments.................................    2,734,742,000      2,608,301,000
Variable annuity assets held in separate accounts...........   11,133,569,000      9,343,200,000
Accrued investment income...................................       26,408,000         21,759,000
Deferred acquisition costs..................................      539,850,000        536,155,000
Income taxes currently receivable...........................        5,869,000                 --
Other assets................................................       85,926,000         61,524,000
                                                              ---------------    ---------------
          TOTAL ASSETS......................................  $14,526,364,000    $12,570,939,000
                                                              ===============    ===============

LIABILITIES AND SHAREHOLDER'S EQUITY
Reserves, payables and accrued liabilities:
  Reserves for fixed annuity contracts......................  $ 2,189,272,000    $ 2,098,803,000
  Reserves for guaranteed investment contracts..............      282,267,000        295,175,000
  Payable to brokers for purchases of securities............       27,053,000            263,000
  Income taxes currently payable............................               --         32,265,000
  Other liabilities.........................................      106,594,000        122,728,000
                                                              ---------------    ---------------
          Total reserves, payables and accrued
           liabilities......................................    2,605,186,000      2,549,234,000
                                                              ---------------    ---------------
Variable annuity liabilities related to separate accounts...   11,133,569,000      9,343,200,000
                                                              ---------------    ---------------
Subordinated notes payable to Parent........................       39,182,000         36,240,000
                                                              ---------------    ---------------
Deferred income taxes.......................................       95,758,000         67,047,000
                                                              ---------------    ---------------
Shareholder's equity:
  Common Stock..............................................        3,511,000          3,511,000
  Additional paid-in capital................................      308,674,000        308,674,000
  Retained earnings.........................................      332,069,000        244,628,000
  Net unrealized gains on debt and equity securities
     available for sale.....................................        8,415,000         18,405,000
                                                              ---------------    ---------------
          Total shareholder's equity........................      652,669,000        575,218,000
                                                              ---------------    ---------------
          TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY........  $14,526,364,000    $12,570,939,000
                                                              ===============    ===============
</TABLE>

                            See accompanying notes.

                                       34
<PAGE>   55

                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                         CONSOLIDATED INCOME STATEMENT

<TABLE>
<CAPTION>
                                                                         YEARS ENDED SEPTEMBER 30,
                                                              -----------------------------------------------
                                                                  1998             1997             1996
                                                              -------------    -------------    -------------
<S>                                                           <C>              <C>              <C>
Investment income...........................................  $ 221,966,000    $ 210,759,000    $ 164,631,000
                                                              -------------    -------------    -------------
Interest expense on:
  Fixed annuity contracts...................................   (112,695,000)    (109,217,000)     (82,690,000)
  Guaranteed investment contracts...........................    (17,787,000)     (22,650,000)     (19,974,000)
  Senior indebtedness.......................................     (1,498,000)      (2,549,000)      (2,568,000)
  Subordinated notes payable to Parent......................     (3,114,000)      (3,142,000)      (2,556,000)
                                                              -------------    -------------    -------------
          Total interest expense............................   (135,094,000)    (137,558,000)    (107,788,000)
                                                              -------------    -------------    -------------
NET INVESTMENT INCOME.......................................     86,872,000       73,201,000       56,843,000
                                                              -------------    -------------    -------------
NET REALIZED INVESTMENT GAINS
  (LOSSES)..................................................     19,482,000      (17,394,000)     (13,355,000)
                                                              -------------    -------------    -------------
Fee income:
  Variable annuity fees.....................................    200,867,000      139,492,000      103,970,000
  Net retained commissions..................................     48,561,000       39,143,000       31,548,000
  Asset management fees.....................................     29,592,000       25,764,000       25,413,000
  Surrender charges.........................................      7,404,000        5,529,000        5,184,000
  Other fees................................................      3,938,000        3,218,000        3,390,000
                                                              -------------    -------------    -------------
          TOTAL FEE INCOME..................................    290,362,000      213,146,000      169,505,000
                                                              -------------    -------------    -------------
GENERAL AND ADMINISTRATIVE
  EXPENSES..................................................    (96,102,000)     (98,802,000)     (81,552,000)
                                                              -------------    -------------    -------------
AMORTIZATION OF DEFERRED
  ACQUISITION COSTS.........................................    (72,713,000)     (66,879,000)     (57,520,000)
                                                              -------------    -------------    -------------
ANNUAL COMMISSIONS..........................................    (18,209,000)      (8,977,000)      (4,613,000)
                                                              -------------    -------------    -------------
PRETAX INCOME...............................................    209,692,000       94,295,000       69,308,000
Income tax expense..........................................    (71,051,000)     (31,169,000)     (24,252,000)
                                                              -------------    -------------    -------------
NET INCOME..................................................  $ 138,641,000    $  63,126,000    $  45,056,000
                                                              =============    =============    =============
</TABLE>

                            See accompanying notes.

                                       35
<PAGE>   56

                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                      CONSOLIDATED STATEMENT OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                            YEARS ENDED SEPTEMBER 30,
                                                              -----------------------------------------------------
                                                                   1998               1997               1996
                                                              ---------------    ---------------    ---------------
<S>                                                           <C>                <C>                <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income................................................  $   138,641,000    $    63,126,000    $    45,056,000
  Adjustments to reconcile net income to net cash provided
    by operating activities:
    Interest credited to:
      Fixed annuity contracts...............................      112,695,000        109,217,000         82,690,000
      Guaranteed investment contracts.......................       17,787,000         22,650,000         19,974,000
    Net realized investment (gains) losses..................      (19,482,000)        17,394,000         13,355,000
    Amortization (accretion) of net premiums (discounts) on
     investments............................................          447,000        (18,576,000)        (8,976,000)
    Amortization of goodwill................................        1,422,000          1,187,000          1,169,000
    Provision for deferred income taxes.....................       34,087,000        (16,024,000)        (3,351,000)
  Change in:
    Accrued investment income...............................       (4,649,000)        (2,084,000)        (5,483,000)
    Deferred acquisition costs..............................     (160,926,000)      (113,145,000)       (60,941,000)
    Other assets............................................      (19,374,000)       (14,598,000)        (8,000,000)
    Income taxes currently payable..........................      (38,134,000)        10,779,000          5,766,000
    Other liabilities.......................................       (2,248,000)        14,187,000          5,474,000
  Other, net................................................       (5,599,000)           418,000           (129,000)
                                                              ---------------    ---------------    ---------------
NET CASH PROVIDED BY OPERATING ACTIVITIES...................       54,667,000         74,531,000         86,604,000
                                                              ---------------    ---------------    ---------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Premium receipts on:
    Fixed annuity contracts.................................    1,512,994,000      1,097,937,000        741,774,000
    Guaranteed investment contracts.........................        5,619,000         55,000,000        134,967,000
  Net exchanges from the fixed accounts of variable annuity
    contracts...............................................   (1,303,790,000)      (620,367,000)      (236,705,000)
  Withdrawal payments on:
    Fixed annuity contracts.................................     (191,690,000)      (242,589,000)      (263,614,000)
    Guaranteed investment contracts.........................      (36,313,000)      (198,062,000)       (16,492,000)
  Claims and annuity payments on fixed annuity contracts....      (40,589,000)       (35,731,000)       (31,107,000)
  Net receipts from (repayments of) other short-term
    financings..............................................      (10,944,000)        34,239,000       (119,712,000)
  Net receipts from a modified coinsurance transaction......      166,631,000                 --                 --
  Capital contributions received............................               --         28,411,000         27,387,000
  Dividends paid............................................      (51,200,000)       (25,500,000)       (29,400,000)
                                                              ---------------    ---------------    ---------------
NET CASH PROVIDED BY FINANCING ACTIVITIES...................       50,718,000         93,338,000        207,098,000
                                                              ---------------    ---------------    ---------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of:
    Bonds, notes and redeemable preferred stocks............  $(1,970,502,000)   $(2,566,211,000)   $(1,937,890,000)
    Mortgage loans..........................................     (131,386,000)      (266,771,000)       (15,000,000)
    Other investments, excluding short-term investments.....               --        (75,556,000)       (36,770,000)
  Sales of:
    Bonds, notes and redeemable preferred stocks............    1,602,079,000      2,299,063,000      1,241,928,000
    Real estate.............................................               --                 --            900,000
    Other investments, excluding short-term investments.....       42,458,000          6,421,000          4,937,000
  Redemptions and maturities of:
    Bonds, notes and redeemable preferred stocks............      424,393,000        376,847,000        288,969,000
    Mortgage loans..........................................       80,515,000         25,920,000         11,324,000
    Other investments, excluding short-term investments.....       67,213,000         23,940,000         20,749,000
                                                              ---------------    ---------------    ---------------
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES............      114,770,000       (176,347,000)      (420,853,000)
                                                              ---------------    ---------------    ---------------
NET INCREASE (DECREASE) IN CASH AND SHORT-TERM
  INVESTMENTS...............................................      220,155,000         (8,478,000)      (127,151,000)
CASH AND SHORT-TERM INVESTMENTS AT BEGINNING OF PERIOD......      113,580,000        122,058,000        249,209,000
                                                              ---------------    ---------------    ---------------
CASH AND SHORT-TERM INVESTMENTS AT END OF PERIOD............  $   333,735,000    $   113,580,000    $   122,058,000
                                                              ===============    ===============    ===============
SUPPLEMENTAL CASH FLOW INFORMATION:
  Interest paid on indebtedness.............................  $     3,912,000    $     7,032,000    $     5,982,000
                                                              ===============    ===============    ===============
  Net income taxes paid.....................................  $    74,932,000    $    36,420,000    $    22,031,000
                                                              ===============    ===============    ===============
</TABLE>

                            See accompanying notes.

                                       36
<PAGE>   57

                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  NATURE OF OPERATIONS

Anchor National Life Insurance Company (the "Company") is a wholly owned
indirect subsidiary of SunAmerica Inc. (the "Parent"). The Company is an
Arizona-domiciled life insurance company and conducts its business through three
segments: annuity operations, asset management operations and broker-dealer
operations. Annuity operations include the sale and administration of fixed and
variable annuities and guaranteed investment contracts. Asset management
operations, which includes the sale and management of mutual funds, is conducted
by SunAmerica Asset Management Corp. Broker-dealer operations include the sale
of securities and financial services products, and are conducted by Royal
Alliance Associates, Inc.

The operations of the Company are influenced by many factors, including general
economic conditions, monetary and fiscal policies of the federal government, and
policies of state and other regulatory authorities. The level of sales of the
Company's financial products is influenced by many factors, including general
market rates of interest, strength, weakness and volatility of equity markets,
and terms and conditions of competing financial products. The Company is exposed
to the typical risks normally associated with a portfolio of fixed-income
securities, namely interest rate, option, liquidity and credit risk. The Company
controls its exposure to these risks by, among other things, closely monitoring
and matching the duration of its assets and liabilities, monitoring and limiting
prepayment and extension risk in its portfolio, maintaining a large percentage
of its portfolio in highly liquid securities, and engaging in a disciplined
process of underwriting, reviewing and monitoring credit risk. The Company also
is exposed to market risk, as market volatility may result in reduced fee income
in the case of assets managed in mutual funds and held in separate accounts.

2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

BASIS OF PRESENTATION: The accompanying consolidated financial statements have
been prepared in accordance with generally accepted accounting principles and
include the accounts of the Company and all of its wholly owned subsidiaries.
All significant intercompany accounts and transactions are eliminated in
consolidation. Certain prior period amounts have been reclassified to conform
with the 1998 presentation.

The preparation of financial statements in conformity with generally accepted
accounting principles requires the use of estimates and assumptions that affect
the amounts reported in the financial statements and the accompanying notes.
Actual results could differ from those estimates.

INVESTMENTS: Cash and short-term investments primarily include cash, commercial
paper, money market investments, repurchase agreements and short-term bank
participations. All such investments are carried at cost plus accrued interest,
which approximates fair value, have maturities of three months or less and are
considered cash equivalents for purposes of reporting cash flows.

Bonds, notes and redeemable preferred stocks available for sale and common
stocks are carried at aggregate fair value and changes in unrealized gains or
losses, net of tax, are credited or charged directly to shareholder's equity.
Bonds, notes and redeemable preferred stocks are reduced to estimated net
realizable value when necessary for declines in value considered to be other
than temporary. Estimates of net realizable value are subjective and actual
realization will be dependent upon future events.

Mortgage loans are carried at amortized unpaid balances, net of provisions for
estimated losses. Real estate is carried at the lower of cost or fair value.
Other invested assets include investments in limited partnerships, which are
accounted for by using the cost method of accounting; separate account
investments; leveraged leases; policy loans, which are carried at unpaid
balances; and collateralized mortgage obligation residuals.

Realized gains and losses on the sale of investments are recognized in
operations at the date of sale and are determined by using the specific cost
identification method. Premiums and discounts on investments are amortized to
investment income by using the interest method over the contractual lives of the
investments.

INTEREST RATE SWAP AGREEMENTS: The net differential to be paid or received on
interest rate swap agreements ("Swap Agreements") entered into to reduce the
impact of changes in interest rates is recognized over the lives of the
agreements, and such differential is classified as Investment Income or Interest
Expense in the income statement. Initially, Swap Agreements are designated as
hedges and, therefore, are not marked to market. However, when a hedged
asset/liability is sold or repaid before the related Swap Agreement matures, the
Swap Agreement is marked to market and any gain/loss is classified with any
gain/loss realized on the disposition of the hedged asset/liability.
Subsequently, the Swap Agreement is marked to market and

                                       37
<PAGE>   58
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)
the resulting change in fair value is included in Investment Income in the
income statement. When a Swap Agreement that is designated as a hedge is
terminated before its contractual maturity, any resulting gain/loss is
credited/charged to the carrying value of the asset/liability that it hedged and
is treated as a premium/discount for the remaining life of the asset/liability.

DEFERRED ACQUISITION COSTS: Policy acquisition costs are deferred and amortized,
with interest, in relation to the incidence of estimated gross profits to be
realized over the estimated lives of the annuity contracts. Estimated gross
profits are composed of net interest income, net realized investment gains and
losses, variable annuity fees, surrender charges and direct administrative
expenses. Costs incurred to sell mutual funds are also deferred and amortized
over the estimated lives of the funds obtained. Deferred acquisition costs
("DAC") consist of commissions and other costs that vary with, and are primarily
related to, the production or acquisition of new business.

As debt and equity securities available for sale are carried at aggregate fair
value, an adjustment is made to DAC equal to the change in amortization that
would have been recorded if such securities had been sold at their stated
aggregate fair value and the proceeds reinvested at current yields. The change
in this adjustment, net of tax, is included with the change in net unrealized
gains/losses on debt and equity securities available for sale that is credited
or charged directly to shareholder's equity. DAC have been decreased by
$7,000,000 at September 30, 1998 and $16,400,000 at September 30, 1997 for this
adjustment.

VARIABLE ANNUITY ASSETS AND LIABILITIES: The assets and liabilities resulting
from the receipt of variable annuity premiums are segregated in separate
accounts. The Company receives administrative fees for managing the funds and
other fees for assuming mortality and certain expense risks. Such fees are
included in Variable Annuity Fees in the income statement.

GOODWILL: Goodwill, amounting to $23,339,000 at September 30, 1998, is amortized
by using the straight-line method over periods averaging 25 years and is
included in Other Assets in the balance sheet. Goodwill is evaluated for
impairment when events or changes in economic conditions indicate that the
carrying amount may not be recoverable.

CONTRACTHOLDER RESERVES: Contractholder reserves for fixed annuity contracts and
guaranteed investment contracts are accounted for as investment-type contracts
in accordance with Statement of Financial Accounting Standards No. 97,
"Accounting and Reporting by Insurance Enterprises for Certain Long-Duration
Contracts and for Realized Gains and Losses from the Sale of Investments," and
are recorded at accumulated value (premiums received, plus accrued interest,
less withdrawals and assessed fees).

FEE INCOME: Variable annuity fees, asset management fees and surrender charges
are recorded in income as earned. Net retained commissions are recognized as
income on a trade date basis.

INCOME TAXES: The Company is included in the consolidated federal income tax
return of the Parent and files as a "life insurance company" under the
provisions of the Internal Revenue Code of 1986. Income taxes have been
calculated as if the Company filed a separate return. Deferred income tax assets
and liabilities are recognized based on the difference between financial
statement carrying amounts and income tax bases of assets and liabilities using
enacted income tax rates and laws.

RECENTLY ISSUED ACCOUNTING STANDARDS: In June 1997, the Financial Accounting
Standards Board (the "FASB") issued Statement of Financial Accounting Standards
No. 130, "Reporting Comprehensive Income" ("SFAS 130") and Statement of
Financial Accounting Standards No. 131, "Disclosure about Segments of an
Enterprise and Related Information" ("SFAS 131").

SFAS 130 establishes standards for reporting comprehensive income and its
components in a full set of general purpose financial statements. SFAS 130 is
effective for the Company as of October 1, 1998 and is not included in these
financial statements.

SFAS 131 establishes standards for the disclosure of information about the
Company's operating segments. SFAS 131 is effective for the year ending
September 30, 1999 and is not included in these financial statements.

Implementation of SFAS 130 and SFAS 131 will not have an impact on the Company's
results of operations, financial condition or liquidity.

In June 1998, the FASB issued Statement of Financial Accounting Standards No.
133, "Accounting for Derivative Instruments and Hedging Activities" ("SFAS
133"). SFAS 133 addresses the accounting for derivative instruments, including
certain derivative instruments embedded in other contracts, and hedging
activities. SFAS 133 is effective for the Company as of October 1, 1999 and is
not included in these financial statements. The Company has not completed its
analysis of the effect of

                                       38
<PAGE>   59
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)
SFAS 133, but management believes that it will not have a material impact on the
Company's results of operations, financial condition or liquidity.

3.  INVESTMENTS

The amortized cost and estimated fair value of bonds, notes and redeemable
preferred stocks available for sale by major category follow:

<TABLE>
<CAPTION>
                                                              AMORTIZED COST    ESTIMATED FAIR VALUE
                                                              --------------    --------------------
<S>                                                           <C>               <C>
AT SEPTEMBER 30, 1998:
  Securities of the United States Government................  $   84,377,000       $   88,239,000
  Mortgage-backed securities................................     569,613,000          584,007,000
  Securities of public utilities............................     108,431,000          106,065,000
  Corporate bonds and notes.................................     883,890,000          884,209,000
  Redeemable preferred stocks...............................       6,125,000            6,888,000
  Other debt securities.....................................     282,427,000          285,346,000
                                                              --------------       --------------
  Total.....................................................  $1,934,863,000       $1,954,754,000
                                                              ==============       ==============
AT SEPTEMBER 30, 1997:
  Securities of the United States Government................  $   18,496,000       $   18,962,000
  Mortgage-backed securities................................     636,018,000          649,196,000
  Securities of public utilities............................      22,792,000           22,893,000
  Corporate bonds and notes.................................     984,573,000        1,012,559,000
  Redeemable preferred stocks...............................       6,125,000            6,681,000
  Other debt securities.....................................     274,481,000          275,903,000
                                                              --------------       --------------
  Total.....................................................  $1,942,485,000       $1,986,194,000
                                                              ==============       ==============
</TABLE>

The amortized cost and estimated fair value of bonds, notes and redeemable
preferred stocks available for sale by contractual maturity, as of September 30,
1998, follow:

<TABLE>
<CAPTION>
                                                              AMORTIZED COST    ESTIMATED FAIR VALUE
                                                              --------------    --------------------
<S>                                                           <C>               <C>
Due in one year or less.....................................  $   19,124,000       $   19,319,000
Due after one year through five years.......................     313,396,000          318,943,000
Due after five years through ten years......................     744,740,000          750,286,000
Due after ten years.........................................     287,990,000          282,199,000
Mortgage-backed securities..................................     569,613,000          584,007,000
                                                              --------------       --------------
Total.......................................................  $1,934,863,000       $1,954,754,000
                                                              ==============       ==============
</TABLE>

Actual maturities of bonds, notes and redeemable preferred stocks will differ
from those shown above due to prepayments and redemptions.

                                       39
<PAGE>   60
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

3.  INVESTMENTS -- (CONTINUED)
Gross unrealized gains and losses on bonds, notes and redeemable preferred
stocks available for sale by major category follow:

<TABLE>
<CAPTION>
                                                                 GROSS          GROSS
                                                              UNREALIZED      UNREALIZED
                                                                 GAINS          LOSSES
                                                              -----------    ------------
<S>                                                           <C>            <C>
AT SEPTEMBER 30, 1998:
  Securities of the United States Government................  $ 3,862,000    $         --
  Mortgage-backed securities................................   15,103,000        (709,000)
  Securities of public utilities............................    2,420,000      (4,786,000)
  Corporate bonds and notes.................................   31,795,000     (31,476,000)
  Redeemable preferred stocks...............................      763,000              --
  Other debt securities.....................................    5,235,000      (2,316,000)
                                                              -----------    ------------
  Total.....................................................  $59,178,000    $(39,287,000)
                                                              ===========    ============
AT SEPTEMBER 30, 1997:
  Securities of the United States Government................  $   498,000    $    (32,000)
  Mortgage-backed securities................................   14,998,000      (1,820,000)
  Securities of public utilities............................      141,000         (40,000)
  Corporate bonds and notes.................................   28,691,000        (705,000)
  Redeemable preferred stocks...............................      556,000              --
  Other debt securities.....................................    1,569,000        (147,000)
                                                              -----------    ------------
  Total.....................................................  $46,453,000    $ (2,744,000)
                                                              ===========    ============
</TABLE>

Gross unrealized gains on equity securities available for sale aggregated
$54,000 and $1,004,000 at September 30, 1998 and 1997, respectively. There were
no unrealized losses at September 30, 1998 and 1997.

Gross realized investment gains and losses on sales of investments are as
follows:

<TABLE>
<CAPTION>
                                                                   YEARS ENDED SEPTEMBER 30,
                                                          --------------------------------------------
                                                              1998            1997            1996
                                                          ------------    ------------    ------------
<S>                                                       <C>             <C>             <C>
BONDS, NOTES AND REDEEMABLE PREFERRED STOCKS:
  Realized gains........................................  $ 28,086,000    $ 22,179,000    $ 14,532,000
  Realized losses.......................................    (4,627,000)    (25,310,000)    (10,432,000)

COMMON STOCKS:
  Realized gains........................................       337,000       4,002,000         511,000
  Realized losses.......................................            --        (312,000)     (3,151,000)

OTHER INVESTMENTS:
  Realized gains........................................     8,824,000       2,450,000       1,135,000
IMPAIRMENT WRITEDOWNS...................................   (13,138,000)    (20,403,000)    (15,950,000)
                                                          ------------    ------------    ------------
          Total net realized investment gains and
            losses......................................  $ 19,482,000    $(17,394,000)   $(13,355,000)
                                                          ============    ============    ============
</TABLE>

                                       40
<PAGE>   61
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

3.  INVESTMENTS -- (CONTINUED)
The sources and related amounts of investment income are as follows:

<TABLE>
<CAPTION>
                                                                   YEARS ENDED SEPTEMBER 30,
                                                          --------------------------------------------
                                                              1998            1997            1996
                                                          ------------    ------------    ------------
<S>                                                       <C>             <C>             <C>
Short-term investments..................................  $ 12,524,000    $ 11,780,000    $ 10,647,000
Bonds, notes and redeemable preferred stocks............   156,140,000     163,038,000     140,387,000
Mortgage loans..........................................    29,996,000      17,632,000       8,701,000
Common stocks...........................................        34,000          16,000           8,000
Real estate.............................................      (467,000)       (296,000)       (196,000)
Cost-method partnerships................................    24,311,000       6,725,000       4,073,000
Other invested assets...................................      (572,000)     11,864,000       1,011,000
                                                          ------------    ------------    ------------
          Total investment income.......................  $221,966,000    $210,759,000    $164,631,000
                                                          ============    ============    ============
</TABLE>

Expenses incurred to manage the investment portfolio amounted to $1,910,000 for
the year ended September 30, 1998, $2,050,000 for the year ended September 30,
1997, and $1,737,000 for the year ended September 30, 1996, and are included in
General and Administrative Expenses in the income statement.

At September 30, 1998, no investment exceeded 10% of the Company's consolidated
shareholder's equity.

At September 30, 1998, mortgage loans were collateralized by properties located
in 29 states, with loans totaling approximately 21% of the aggregate carrying
value of the portfolio secured by properties located in California and
approximately 14% by properties located in New York. No more than 8% of the
portfolio was secured by properties in any other single state.

At September 30, 1998, bonds, notes and redeemable preferred stocks included
$167,564,000 of bonds and notes not rated investment grade. The Company had no
material concentrations of non-investment-grade assets at September 30, 1998.

At September 30, 1998, the carrying value of investments in default as to the
payment of principal or interest was $917,000, all of which were mortgage loans.
Such nonperforming investments had an estimated fair value equal to their
carrying value.

As a component of its asset and liability management strategy, the Company
utilizes Swap Agreements to match assets more closely to liabilities. Swap
Agreements are agreements to exchange with a counterparty interest rate payments
of differing character (for example, variable-rate payments exchanged for
fixed-rate payments) based on an underlying principal balance (notional
principal) to hedge against interest rate changes. The Company typically
utilizes Swap Agreements to create a hedge that effectively converts
floating-rate assets and liabilities to fixed-rate instruments. At September 30,
1998, the Company had one outstanding Swap Agreement with a notional principal
amount of $21,538,000, which matures in December 2024. The net interest paid
amounted to $278,000 and $125,000 for the years ended September 30, 1998 and
1997, respectively, and is included in Interest Expense on Guaranteed Investment
Contracts in the income statement.

At September 30, 1998, $5,154,000 of bonds, at amortized cost, were on deposit
with regulatory authorities in accordance with statutory requirements.

4.  FAIR VALUE OF FINANCIAL INSTRUMENTS

The following estimated fair value disclosures are limited to reasonable
estimates of the fair value of only the Company's financial instruments. The
disclosures do not address the value of the Company's recognized and
unrecognized nonfinancial assets (including its real estate investments and
other invested assets except for cost-method partnerships) and liabilities or
the value of anticipated future business. The Company does not plan to sell most
of its assets or settle most of its liabilities at these estimated fair values.

The fair value of a financial instrument is the amount at which the instrument
could be exchanged in a current transaction between willing parties, other than
in a forced or liquidation sale. Selling expenses and potential taxes are not
included. The estimated fair value amounts were determined using available
market information, current pricing information and various valuation
methodologies. If quoted market prices were not readily available for a
financial instrument, management determined an estimated fair value.
Accordingly, the estimates may not be indicative of the amounts the financial
instruments could be exchanged for in a current or future market transaction.

                                       41
<PAGE>   62
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

4.  FAIR VALUE OF FINANCIAL INSTRUMENTS -- (CONTINUED)
The following methods and assumptions were used to estimate the fair value of
each class of financial instruments for which it is practicable to estimate that
value:

CASH AND SHORT-TERM INVESTMENTS: Carrying value is considered to be a reasonable
estimate of fair value.

BONDS, NOTES AND REDEEMABLE PREFERRED STOCKS: Fair value is based principally on
independent pricing services, broker quotes and other independent information.

MORTGAGE LOANS: Fair values are primarily determined by discounting future cash
flows to the present at current market rates, using expected prepayment rates.

COMMON STOCKS: Fair value is based principally on independent pricing services,
broker quotes and other independent information.

COST-METHOD PARTNERSHIPS: Fair value of limited partnerships accounted for by
using the cost method is based upon the fair value of the net assets of the
partnerships as determined by the general partners.

VARIABLE ANNUITY ASSETS HELD IN SEPARATE ACCOUNTS: Variable annuity assets are
carried at the market value of the underlying securities.

RESERVES FOR FIXED ANNUITY CONTRACTS: Deferred annuity contracts and single
premium life contracts are assigned a fair value equal to current net surrender
value. Annuitized contracts are valued based on the present value of future cash
flows at current pricing rates.

RESERVES FOR GUARANTEED INVESTMENT CONTRACTS: Fair value is based on the present
value of future cash flows at current pricing rates and is net of the estimated
fair value of a hedging Swap Agreement, determined from independent broker
quotes.

PAYABLE TO BROKERS FOR PURCHASES OF SECURITIES: Such obligations represent net
transactions of a short-term nature for which the carrying value is considered a
reasonable estimate of fair value.

VARIABLE ANNUITY LIABILITIES RELATED TO SEPARATE ACCOUNTS: Fair values of
contracts in the accumulation phase are based on net surrender values. Fair
values of contracts in the payout phase are based on the present value of future
cash flows at assumed investment rates.

SUBORDINATED NOTES PAYABLE TO PARENT: Fair value is estimated based on the
quoted market prices for similar issues.

                                       42
<PAGE>   63
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

4.  FAIR VALUE OF FINANCIAL INSTRUMENTS -- (CONTINUED)
The estimated fair values of the Company's financial instruments at September
30, 1998 and 1997, compared with their respective carrying values, are as
follows:

<TABLE>
<CAPTION>
                                                              CARRYING VALUE       FAIR VALUE
                                                              ---------------    ---------------
<S>                                                           <C>                <C>
1998:
ASSETS:
  Cash and short-term investments...........................  $   333,735,000    $   333,735,000
  Bonds, notes and redeemable preferred stocks..............    1,954,754,000      1,954,754,000
  Mortgage loans............................................      391,448,000        415,981,000
  Common stocks.............................................          169,000            169,000
  Cost-method partnerships..................................        4,403,000         12,744,000
  Variable annuity assets held in separate accounts.........   11,133,569,000     11,133,569,000
LIABILITIES:
  Reserves for fixed annuity contracts......................    2,189,272,000      2,116,874,000
  Reserves for guaranteed investment contracts..............      282,267,000        282,267,000
  Payable to brokers for purchases of securities............       27,053,000         27,053,000
  Variable annuity liabilities related to separate
     accounts...............................................   11,133,569,000     10,696,607,000
  Subordinated notes payable to Parent......................       39,182,000         40,550,000
                                                              ===============    ===============
1997:
ASSETS:
  Cash and short-term investments...........................  $   113,580,000    $   113,580,000
  Bonds, notes and redeemable preferred stocks..............    1,986,194,000      1,986,194,000
  Mortgage loans............................................      339,530,000        354,495,000
  Common stocks.............................................        1,275,000          1,275,000
  Cost-method partnerships..................................       46,880,000         84,186,000
  Variable annuity assets held in separate accounts.........    9,343,200,000      9,343,200,000
LIABILITIES:
  Reserves for fixed annuity contracts......................    2,098,803,000      2,026,258,000
  Reserves for guaranteed investment contracts..............      295,175,000        295,175,000
  Payable to brokers for purchases of securities............          263,000            263,000
  Variable annuity liabilities related to separate
     accounts...............................................    9,343,200,000      9,077,200,000
  Subordinated notes payable to Parent......................       36,240,000         37,393,000
                                                              ===============    ===============
</TABLE>

5.  SUBORDINATED NOTES PAYABLE TO PARENT

Subordinated notes and accrued interest payable to Parent totaled $39,182,000 at
interest rates ranging from 8.5% to 9% at September 30, 1998, and require
principal payments of $23,060,000 in 1999, $5,400,000 in 2000 and $10,000,000 in
2001.

6.  REINSURANCE

On August 11, 1998, the Company entered into a modified coinsurance transaction,
approved by the Arizona Department of Insurance, which involves the ceding of
approximately $5,000,000,000 of variable annuities to ANLIC Insurance Company
(Cayman), a Cayman Islands stock life insurance company, effective December 31,
1997. As a part of this transaction, the Company received cash amounting to
approximately $188,700,000, and recorded a corresponding reduction of DAC
related to the coinsured annuities.

As payments are made to the reinsurer, the reduction of DAC is relieved. The net
reduction in DAC at September 30, 1998 was $166,631,000. Certain expenses
related to this transaction are being charged directly to DAC amortization in
the income statement. The net effect of this transaction in the income statement
is not material.

                                       43
<PAGE>   64
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

7.  CONTINGENT LIABILITIES

The Company has entered into three agreements in which it has provided liquidity
support for certain short-term securities of two municipalities by agreeing to
purchase such securities in the event there is no other buyer in the short-term
marketplace. In return the Company receives a fee. The maximum liability under
these guarantees is $242,600,000. Management does not anticipate any material
future losses with respect to these liquidity support facilities. An additional
$51,000,000 has been committed to investments in the process of being funded or
to be available in the case of certain natural disasters, for which the Company
receives a fee.

The Company is involved in various kinds of litigation common to its businesses.
These cases are in various stages of development and, based on reports of
counsel, management believes that provisions made for potential losses relating
to such litigation are adequate and any further liabilities and costs will not
have a material adverse impact upon the Company's financial position or results
of operations.

8.  SHAREHOLDER'S EQUITY

The Company is authorized to issue 4,000 shares of its $1,000 par value Common
Stock. At September 30, 1998 and 1997, 3,511 shares were outstanding.

Changes in shareholder's equity are as follows:

<TABLE>
<CAPTION>
                                                                   YEARS ENDED SEPTEMBER 30,
                                                          --------------------------------------------
                                                              1998            1997            1996
                                                          ------------    ------------    ------------
<S>                                                       <C>             <C>             <C>
ADDITIONAL PAID-IN CAPITAL:
  Beginning balances....................................  $308,674,000    $280,263,000    $252,876,000
  Capital contributions received........................            --      28,411,000      27,387,000
                                                          ------------    ------------    ------------
  Ending balances.......................................  $308,674,000    $308,674,000    $280,263,000
                                                          ============    ============    ============
RETAINED EARNINGS:
  Beginning balances....................................  $244,628,000    $207,002,000    $191,346,000
  Net income............................................   138,641,000      63,126,000      45,056,000
  Dividend paid.........................................   (51,200,000)    (25,500,000)    (29,400,000)
                                                          ------------    ------------    ------------
  Ending balances.......................................  $332,069,000    $244,628,000    $207,002,000
                                                          ============    ============    ============
NET UNREALIZED GAINS (LOSSES) ON
  DEBT AND EQUITY SECURITIES
  AVAILABLE FOR SALE:
  Beginning balances....................................  $ 18,405,000    $ (5,521,000)   $ (5,673,000)
  Change in net unrealized gains (losses) on debt
     securities available for sale......................   (23,818,000)     57,463,000      (2,904,000)
  Change in net unrealized gains (losses) on equity
     securities available for sale......................      (950,000)        (55,000)      3,538,000
  Change in adjustment to deferred acquisition costs....     9,400,000     (20,600,000)       (400,000)
  Tax effects of net changes............................     5,378,000     (12,882,000)        (82,000)
                                                          ------------    ------------    ------------
  Ending balances.......................................  $  8,415,000    $ 18,405,000    $ (5,521,000)
                                                          ============    ============    ============
</TABLE>

Dividends that the Company may pay to its shareholder in any year without prior
approval of the Arizona Department of Insurance are limited by statute. The
maximum amount of dividends which can be paid to shareholders of insurance
companies domiciled in the state of Arizona without obtaining the prior approval
of the Insurance Commissioner is limited to the lesser of either 10% of the
preceding year's statutory surplus or the preceding year's statutory net gain
from operations. Dividends in the amounts of $51,200,000, $25,500,000 and
$29,400,000 were paid on June 4, 1998, April 1, 1997 and March 18, 1996,
respectively.

Under statutory accounting principles utilized in filings with insurance
regulatory authorities, the Company's net income for the nine months ended
September 30, 1998 was $64,125,000. The statutory net income for the year ended
December 31, 1997 was $74,407,000, and the statutory net income for the year
ended December 31, 1996 was $27,928,000. The Company's statutory

                                       44
<PAGE>   65
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

8.  SHAREHOLDER'S EQUITY -- (CONTINUED)
capital and surplus was $537,542,000 at September 30, 1998, $567,979,000 at
December 31, 1997 and $311,176,000 at December 31, 1996.

9.  INCOME TAXES

The components of the provisions for federal income taxes on pretax income
consist of the following:

<TABLE>
<CAPTION>
                                                           NET REALIZED
                                                            INVESTMENT
                                                          GAINS (LOSSES)     OPERATIONS        TOTAL
                                                          --------------    ------------    ------------
<S>                                                       <C>               <C>             <C>
1998:
  Currently payable.....................................   $  4,221,000     $ 32,743,000    $ 36,964,000
  Deferred..............................................       (550,000)      34,637,000      34,087,000
                                                           ------------     ------------    ------------
          Total income tax expense......................   $  3,671,000     $ 67,380,000    $ 71,051,000
                                                           ============     ============    ============
1997:
  Currently payable.....................................   $ (3,635,000)    $ 50,828,000    $ 47,193,000
  Deferred..............................................     (2,258,000)     (13,766,000)    (16,024,000)
                                                           ------------     ------------    ------------
          Total income tax expense......................   $ (5,893,000)    $ 37,062,000    $ 31,169,000
                                                           ============     ============    ============
1996:
  Currently payable.....................................   $  5,754,000     $ 21,849,000    $ 27,603,000
  Deferred..............................................    (10,347,000)       6,996,000      (3,351,000)
                                                           ------------     ------------    ------------
          Total income tax expense......................   $ (4,593,000)    $ 28,845,000    $ 24,252,000
                                                           ============     ============    ============
</TABLE>

Income taxes computed at the United States federal income tax rate of 35% and
income taxes provided differ as follows:

<TABLE>
<CAPTION>
                                                                     YEARS ENDED SEPTEMBER 30,
                                                             -----------------------------------------
                                                                1998           1997           1996
                                                             -----------    -----------    -----------
<S>                                                          <C>            <C>            <C>
Amount computed at statutory rate..........................  $73,392,000    $33,003,000    $24,258,000
Increases (decreases) resulting from:
  Amortization of differences between book and tax bases of
     net assets acquired...................................      460,000        666,000        464,000
  State income taxes, net of federal tax benefit...........    5,530,000      1,950,000      2,070,000
  Dividends-received deduction.............................   (7,254,000)    (4,270,000)    (2,357,000)
  Tax credits..............................................   (1,296,000)      (318,000)      (257,000)
  Other, net...............................................      219,000        138,000         74,000
                                                             -----------    -----------    -----------
          Total income tax expense.........................  $71,051,000    $31,169,000    $24,252,000
                                                             ===========    ===========    ===========
</TABLE>

For United States federal income tax purposes, certain amounts from life
insurance operations are accumulated in a memorandum policyholders' surplus
account and are taxed only when distributed to shareholders or when such account
exceeds prescribed limits. The accumulated policyholders' surplus was
$14,300,000 at September 30, 1998. The Company does not anticipate any
transactions which would cause any part of this surplus to be taxable.

                                       45
<PAGE>   66
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

9.  INCOME TAXES -- (CONTINUED)
Deferred income taxes reflect the net tax effects of temporary differences
between the carrying amounts of assets and liabilities for financial reporting
purposes and the amounts used for income tax reporting purposes. The significant
components of the liability for Deferred Income Taxes are as follows:

<TABLE>
<CAPTION>
                                                                      SEPTEMBER 30,
                                                              ------------------------------
                                                                  1998             1997
                                                              -------------    -------------
<S>                                                           <C>              <C>
DEFERRED TAX LIABILITIES:
Investments.................................................  $  17,643,000    $  13,160,000
Deferred acquisition costs..................................    223,392,000      154,949,000
State income taxes..........................................      2,873,000        1,777,000
Other liabilities...........................................        144,000               --
Net unrealized gains on debt and equity securities available
  for sale..................................................      4,531,000        9,910,000
                                                              -------------    -------------
Total deferred tax liabilities..............................    248,583,000      179,796,000
                                                              -------------    -------------
DEFERRED TAX ASSETS:
Contractholder reserves.....................................   (149,915,000)    (108,090,000)
Guaranty fund assessments...................................     (2,910,000)      (2,707,000)
Other assets................................................             --       (1,952,000)
                                                              -------------    -------------
Total deferred tax assets...................................   (152,825,000)    (112,749,000)
                                                              -------------    -------------
Deferred income taxes.......................................  $  95,758,000    $  67,047,000
                                                              =============    =============
</TABLE>

10.  RELATED-PARTY MATTERS

The Company pays commissions to five affiliated companies, SunAmerica
Securities, Inc., Advantage Capital Corp., Financial Services Corp., Sentra
Securities Corp. and Spelman & Co. Inc. Commissions paid to these broker-dealers
totaled $32,946,000 in 1998, $25,492,000 in 1997, and $16,906,000 in 1996. These
broker-dealers, when combined with the Company's wholly owned broker-dealer,
represent a significant portion of the Company's business, amounting to
approximately 33.6%, 36.1%, and 38.3% of premiums in 1998, 1997, and 1996,
respectively. The Company also sells its products through unaffiliated
broker-dealers, the largest two of which represented approximately 17.3% and
8.4% of premiums in 1998, 19.2% and 10.1% in 1997, and 19.7% and 10.2% in 1996,
respectively.

The Company purchases administrative, investment management, accounting,
marketing and data processing services from SunAmerica Financial, whose purpose
is to provide services to the Company and its affiliates. Amounts paid for such
services totaled $84,975,000 for the year ended September 30, 1998, $86,116,000
for the year ended September 30, 1997 and $65,351,000 for the year ended
September 30, 1996. The marketing component of such costs during these periods
amounted to $39,482,000, $31,968,000 and $17,442,000, respectively, and are
deferred and amortized as part of Deferred Acquisition Costs. The other
components of such costs are included in General and Administrative Expenses in
the income statement.

The Parent made a capital contribution of $28,411,000 in December 1996 to the
Company, through the Company's direct parent, in exchange for the termination of
its guaranty with respect to certain real estate owned in Arizona. Accordingly,
the Company reduced the carrying value of this real estate to estimated fair
value to reflect the termination of the guaranty.

During the year ended September 30, 1998, the Company sold various invested
assets to the Parent for cash equal to their current market value of
$64,431,000. The Company recorded a net gain aggregating $16,388,000 on such
transactions.

During the year ended September 30, 1998, the Company purchased certain invested
assets from the Parent, SunAmerica Life Insurance Company and CalAmerica Life
Insurance Company for cash equal to their current market value, which aggregated
$20,666,000, $10,468,000 and $61,000, respectively.

During the year ended September 30, 1997, the Company sold various invested
assets to SunAmerica Life Insurance Company and to CalAmerica Life Insurance
Company for cash equal to their current market value of $15,776,000 and $15,000,
respectively. The Company recorded a net gain aggregating $276,000 on such
transactions.

                                       46
<PAGE>   67
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

10.  RELATED-PARTY MATTERS (CONTINUED)
During the year ended September 30, 1997, the Company purchased certain invested
assets from SunAmerica Life Insurance Company and CalAmerica Life Insurance
Company for cash equal to their current market value of $8,717,000 and $284,000,
respectively.

During the year ended September 30, 1996, the Company sold various invested
assets to the Parent and to SunAmerica Life Insurance Company for cash equal to
their current market value of $274,000 and $47,321,000, respectively. The
Company recorded a net loss aggregating $3,000 on such transactions.

During the year ended September 30, 1996, the Company purchased certain invested
assets from SunAmerica Life Insurance Company for cash equal to their current
market value, which aggregated $28,379,000.

11.  BUSINESS SEGMENTS

Summarized data for the Company's business segments follow:

<TABLE>
<CAPTION>
                                                                    TOTAL
                                                                 DEPRECIATION
                                                                     AND
                                                    TOTAL        AMORTIZATION       PRETAX            TOTAL
                                                   REVENUES        EXPENSE          INCOME           ASSETS
                                                 ------------    ------------    ------------    ---------------
<S>                                              <C>             <C>             <C>             <C>
1998:
  Annuity operations...........................  $443,407,000    $60,731,000     $178,120,000    $14,366,018,000
  Broker-dealer operations.....................    47,363,000      1,770,000       22,401,000         55,870,000
  Asset management operations..................    41,040,000     14,780,000        9,171,000        104,476,000
                                                 ------------    -----------     ------------    ---------------
          Total................................  $531,810,000    $77,281,000     $209,692,000    $14,526,364,000
                                                 ============    ===========     ============    ===============
1997:
  Annuity operations...........................  $332,845,000    $55,675,000     $ 74,792,000    $12,438,021,000
  Broker-dealer operations.....................    38,005,000        689,000       16,705,000         51,400,000
  Asset management operations..................    35,661,000     16,357,000        2,798,000         81,518,000
                                                 ------------    -----------     ------------    ---------------
          Total................................  $406,511,000    $72,721,000     $ 94,295,000    $12,570,939,000
                                                 ============    ===========     ============    ===============
1996:
  Annuity operations...........................  $256,681,000    $43,974,000     $ 53,827,000    $ 9,092,770,000
  Broker-dealer operations.....................    31,053,000        449,000       13,033,000         37,355,000
  Asset management operations..................    33,047,000     18,295,000        2,448,000         74,410,000
                                                 ------------    -----------     ------------    ---------------
          Total................................  $320,781,000    $62,718,000     $ 69,308,000    $ 9,204,535,000
                                                 ============    ===========     ============    ===============
</TABLE>

12.  SUBSEQUENT EVENTS

On July 15, 1998, the Company entered into a definitive agreement to acquire the
individual life business and the individual and group annuity business of MBL
Life Assurance Corporation ("MBL Life") via a 100% coinsurance transaction for
approximately $130,000,000 in cash. The transaction will include approximately
$2,000,000,000 of universal life reserves and $3,000,000,000 of fixed annuity
reserves. The Company plans to reinsure a large portion of the mortality risk
associated with the acquired block of universal life business. Completion of
this acquisition is expected by the end of calendar year 1998 and is subject to
customary conditions and required approvals. Included in this block of business
is approximately $250,000,000 of individual life business and $500,000,000 of
group annuity business whose contract owners are residents of New York State
("the New York Business"). Approximately six months subsequent to completion of
the transaction, the New York Business will be acquired by the Company's New
York affiliate, First SunAmerica Life Insurance Company, and the remainder of
the business will be acquired by the Company via assumption reinsurance
agreements between MBL Life and the respective companies, which will supersede
the coinsurance agreement. The $130,000,000 purchase price will be allocated
between the Company and its affiliate based on their respective assumed life
insurance reserves.

                                       47
<PAGE>   68
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

12.  SUBSEQUENT EVENTS (CONTINUED)
On August 20, 1998, the Parent announced that it has entered into a definite
agreement to merge with and into American International Group, Inc. ("AIG").
Under the terms of the agreement, each share of the Parent's common stock
(including Nontransferable Class B) will be exchanged for 0.855 shares of AIG's
common stock. The transaction will be treated as a pooling of interests for
accounting purposes and will be a tax-free reorganization. The transaction was
approved by both the Parent's and AIG's shareholders on November 18, 1998, and,
subject to various regulatory approvals, will be completed in late 1998 or early
1999.

                                       48
<PAGE>   69




                          VARIABLE ANNUITY ACCOUNT FOUR

                                       OF

                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                              FINANCIAL STATEMENTS

                               SEPTEMBER 30, 1999




<PAGE>   70


                        REPORT OF INDEPENDENT ACCOUNTANTS


To the Board of Directors of Anchor National Life Insurance Company
and the Contractholders of its separate account, Variable Annuity Account Four


In our opinion, the accompanying statement of net assets, including the schedule
of portfolio investments, and the related statements of operations and of
changes in net assets present fairly, in all material respects, the financial
position of each of the Variable Accounts constituting Variable Annuity Account
Four, a separate account of Anchor National Life Insurance Company (the
"Separate Account") at September 30, 1999, the results of their operations for
the year then ended, and the changes in their net assets for each of the two
years then ended, in conformity with generally accepted accounting principles.
These financial statements are the responsibility of the Separate Account's
management; our responsibility is to express an opinion on these financial
statements based on our audits. We conducted our audits of these financial
statements in accordance with generally accepted auditing standards which
require that we plan and perform the audit to obtain reasonable assurance about
whether the financial statements are free of material misstatement. An audit
includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements, assessing the accounting principles
used and significant estimates made by management, and evaluating the overall
financial statement presentation. We believe that our audits, which included
confirmation of securities owned at September 30, 1999 by correspondence with
the custodian, provide a reasonable basis for the opinion expressed above.



December 21, 1999

<PAGE>   71

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF NET ASSETS
                               SEPTEMBER 30, 1999


<TABLE>
<CAPTION>
                                                                               Government   International
                                         Capital                   Natural            and     Diversified      Global    Aggressive
                                    Appreciation      Growth     Resources   Quality Bond        Equities    Equities        Growth
                                       Portfolio   Portfolio     Portfolio      Portfolio       Portfolio   Portfolio    Portfolio
                                    -----------------------------------------------------------------------------------------------
<S>                                 <C>           <C>           <C>           <C>           <C>           <C>           <C>
Assets:
     Investments in Anchor Series
        Trust, at market value      $46,577,219   $25,956,048   $ 2,219,782   $23,419,332   $         0   $         0   $         0
     Investments in SunAmerica
        Series Trust, at market
        value                                 0             0             0             0    57,791,818    35,202,010    12,285,342

Liabilities                                   0             0             0             0             0             0             0
                                    -----------------------------------------------------------------------------------------------
Net Assets                          $46,577,219   $25,956,048   $ 2,219,782   $23,419,332   $57,791,818   $35,202,010   $12,285,342
                                    ===============================================================================================

Accumulation units outstanding        1,494,585       949,160       187,548     1,752,330     4,003,753     1,626,029       774,082
                                    ===============================================================================================

Unit value of accumulation units    $     31.17   $     27.35   $     11.82   $     13.36   $     14.45   $     21.64   $     15.87
                                    ===============================================================================================
</TABLE>



                 See accompanying notes to financial statements.

<PAGE>   72


                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF NET ASSETS
                               SEPTEMBER 30, 1999
                                   (Continued)


<TABLE>
<CAPTION>
                                Venture      Federated       Alliance        Growth-          Asset     SunAmerica
                                  Value          Value         Growth         Income     Allocation       Balanced        Utility
                              Portfolio      Portfolio      Portfolio      Portfolio      Portfolio      Portfolio      Portfolio
                             ------------------------------------------------------------------------------------------------------
<S>                          <C>            <C>            <C>            <C>            <C>            <C>            <C>
Assets:
     Investments in Anchor
         Series Trust, at
         market value        $          0   $          0   $          0   $          0   $          0   $          0   $          0
     Investments in
        SunAmerica Series
        Trust, at market
        value                  86,981,135     14,419,285    111,666,442     91,525,440     31,640,174     38,841,058     11,067,399

Liabilities                             0              0              0              0              0              0              0
                             ------------------------------------------------------------------------------------------------------

Net Assets                   $ 86,981,135   $ 14,419,285   $111,666,442   $ 91,525,440   $ 31,640,174   $ 38,841,058   $ 11,067,399
                             ======================================================================================================

Accumulation units
   outstanding                  3,467,570        903,640      2,783,849      3,021,724      1,739,341      2,260,344        753,305
                             ======================================================================================================

Unit value of
   accumulation units        $      25.08   $      15.96   $      40.11   $      30.29   $      18.19   $      17.18   $      14.69
                             ======================================================================================================
</TABLE>



                 See accompanying notes to financial statements.

<PAGE>   73


                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF NET ASSETS
                               SEPTEMBER 30, 1999
                                   (Continued)


<TABLE>
<CAPTION>
                                Worldwide    High-Yield         Global      Corporate       "Dogs" of          Cash
                              High Income          Bond           Bond           Bond     Wall Street    Management
                                Portfolio     Portfolio      Portfolio      Portfolio       Portfolio     Portfolio          TOTAL
                              ------------------------------------------------------------------------------------------------------
<S>                           <C>            <C>            <C>            <C>            <C>            <C>            <C>
Assets:
  Investments in Anchor
     Series Trust, at
     market value             $          0   $          0   $          0   $          0   $          0   $          0   $ 98,172,381
  Investments in SunAmerica
     Series Trust, at
     market value                5,340,698     16,177,218      6,226,797     14,458,734     10,883,432     72,149,136    616,656,118

Liabilities                              0              0              0              0              0              0              0
                              ------------------------------------------------------------------------------------------------------

Net Assets                    $  5,340,698   $ 16,177,218   $  6,226,797   $ 14,458,734   $ 10,883,432   $ 72,149,136   $714,828,499
                              ======================================================================================================


Accumulation units
  outstanding                      368,951      1,111,851        441,986      1,131,336      1,163,744      5,940,012
                              =======================================================================================

Unit value of
  accumulation units          $      14.48   $      14.55   $      14.09   $      12.77   $       9.35   $      12.14
                              =======================================================================================
</TABLE>



                See accompanying notes to financial statements.

<PAGE>   74

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                        SCHEDULE OF PORTFOLIO INVESTMENTS
                               SEPTEMBER 30, 1999

<TABLE>
<CAPTION>
                                                                                Market Value        Market
Variable Accounts                                            Shares                Per Share         Value             Cost
- ----------------------------------------------------------------------------------------------------------------------------
<S>                                                       <C>            <C>                  <C>               <C>
ANCHOR SERIES TRUST:
     Capital Appreciation Portfolio                       1,135,611      $            41.02   $ 46,577,219      $ 45,956,280
     Growth Portfolio                                       806,659                   32.18     25,956,048        25,511,398
     Natural Resources Portfolio                            145,205                   15.29      2,219,782         2,211,935
     Government and Quality Bond Portfolio                1,706,819                   13.72     23,419,332        24,552,535
                                                                                              ------------      ------------
                                                                                                98,172,381        98,232,148
                                                                                              ------------      ------------
SUNAMERICA SERIES TRUST:
     International Diversified Equities Portfolio         4,247,141                   13.61     57,791,818        57,698,782
     Global Equities Portfolio                            1,991,358                   17.68     35,202,010        35,629,340
     Aggressive Growth Porfolio                             808,309                   15.20     12,285,342        12,255,163
     Venture Value Portfolio                              3,622,306                   24.01     86,981,135        80,408,523
     Federated Value Portfolio                              924,393                   15.60     14,419,285        14,463,318
     Alliance Growth Portfolio                            3,536,451                   31.58    111,666,442       103,021,582
     Growth-Income Portfolio                              3,343,858                   27.37     91,525,440        80,075,475
     Asset Allocation Portfolio                           2,307,476                   13.71     31,640,174        35,201,626
     SunAmerica Balanced Portfolio                        2,274,736                   17.07     38,841,058        35,585,088
     Utility Portfolio                                      794,332                   13.93     11,067,399        11,146,693
     Worldwide High Income Portfolio                        546,378                    9.77      5,340,698         6,424,440
     High-Yield Bond Portfolio                            1,583,264                   10.22     16,177,218        17,967,252
     Global Bond Portfolio                                  578,105                   10.77      6,226,797         6,583,186
     Corporate Bond Portfolio                             1,303,035                   11.10     14,458,734        15,089,489
     "Dogs" of Wall Street Portfolio                      1,172,577                    9.28     10,883,432        11,362,722
     Cash Management Portfolio                            6,714,608                   10.75     72,149,136        72,073,211
                                                                                              ------------      ------------
                                                                                               616,656,118       594,985,890
                                                                                              ------------      ------------
                                                                                              $714,828,499      $693,218,038
                                                                                              ============      ============
</TABLE>



                 See accompanying notes to financial statements.

<PAGE>   75

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF OPERATIONS
                               FOR THE YEAR ENDED
                               SEPTEMBER 30, 1999


<TABLE>
<CAPTION>
                                                                                                                 Government
                                                                      Capital                       Natural             and
                                                                 Appreciation         Growth      Resources    Quality Bond
                                                                    Portfolio      Portfolio      Portfolio       Portfolio
                                                              -------------------------------------------------------------
<S>                                                               <C>            <C>               <C>          <C>
Investment income:
     Dividends and capital gains distributions                    $ 2,001,406    $ 1,776,008       $ 35,708     $ 1,127,006
                                                              -------------------------------------------------------------
         Total investment income                                    2,001,406      1,776,008         35,708       1,127,006
                                                              -------------------------------------------------------------

Expenses:
     Mortality risk charge                                           (360,530)      (222,959)       (24,211)       (211,359)
     Expense risk charge                                             (123,711)       (76,506)        (8,308)        (72,525)
     Distribution expense charge                                      (53,019)       (32,788)        (3,560)        (31,083)
                                                              -------------------------------------------------------------
         Total expenses                                              (537,260)      (332,253)       (36,079)       (314,967)
                                                              -------------------------------------------------------------

Net investment income (loss)                                        1,464,146      1,443,755           (371)        812,039
                                                              -------------------------------------------------------------

Net realized gains (losses) from securities
  transactions:
     Proceeds from shares sold                                     81,097,869     12,917,211      4,334,148      15,779,602
     Cost of shares sold                                          (73,381,281)   (11,638,395)    (4,439,141)    (15,654,649)
                                                              -------------------------------------------------------------

Net realized gains (losses) from
    securities transactions                                         7,716,588      1,278,816       (104,993)        124,953
                                                              -------------------------------------------------------------

Net unrealized appreciation (depreciation)
  of investments:
     Beginning of period                                           (2,879,381)      (832,297)      (523,915)        307,389
     End of period                                                    620,939        444,650          7,847      (1,133,203)
                                                              -------------------------------------------------------------

Change in net unrealized appreciation/
    depreciation of investments                                     3,500,320      1,276,947        531,762      (1,440,592)
                                                              -------------------------------------------------------------

Increase (decrease) in net assets from operations                $ 12,681,054    $ 3,999,518      $ 426,398      $ (503,600)
                                                              =============================================================
</TABLE>


<TABLE>
<CAPTION>
                                                               International
                                                                 Diversified         Global      Aggressive
                                                                    Equities       Equities          Growth
                                                                   Portfolio      Portfolio       Portfolio
                                                              ----------------------------------------------
<S>                                                              <C>            <C>             <C>
Investment income:
     Dividends and capital gains distributions                   $ 1,447,380    $ 2,723,357     $ 1,008,703
                                                              ---------------------------------------------
         Total investment income                                   1,447,380      2,723,357       1,008,703
                                                              ---------------------------------------------

Expenses:
     Mortality risk charge                                          (344,848)      (194,670)       (109,409)
     Expense risk charge                                            (118,330)       (66,799)        (37,542)
     Distribution expense charge                                     (50,713)       (28,628)        (16,090)
                                                              ---------------------------------------------
         Total expenses                                             (513,891)      (290,097)       (163,041)
                                                              ---------------------------------------------

Net investment income (loss)                                         933,489      2,433,260         845,662
                                                              ---------------------------------------------

Net realized gains (losses) from securities
  transactions:
     Proceeds from shares sold                                 1,325,096,772    334,616,621      26,132,237
     Cost of shares sold                                      (1,314,798,365)  (332,875,909)    (23,942,577)
                                                              ---------------------------------------------

Net realized gains (losses) from
    securities transactions                                       10,298,407      1,740,712       2,189,660
                                                              ---------------------------------------------

Net unrealized appreciation (depreciation)
  of investments:
     Beginning of period                                            (911,428)    (1,492,969)       (473,496)
     End of period                                                    93,036       (427,330)         30,179
                                                              ---------------------------------------------

Change in net unrealized appreciation/
    depreciation of investments                                    1,004,464      1,065,639         503,675
                                                              ---------------------------------------------

Increase (decrease) in net assets from operations               $ 12,236,360    $ 5,239,611     $ 3,538,997
                                                              =============================================
</TABLE>



                 See accompanying notes to financial statements.


<PAGE>   76

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF OPERATIONS
                               FOR THE YEAR ENDED
                               SEPTEMBER 30, 1999
                                   (Continued)


<TABLE>
<CAPTION>
                                                                      Venture      Federated       Alliance         Growth-
                                                                        Value          Value         Growth          Income
                                                                    Portfolio      Portfolio      Portfolio       Portfolio
                                                              -------------------------------------------------------------
<S>                                                               <C>              <C>          <C>             <C>
Investment income:
     Dividends and capital gains distributions                    $ 3,811,291      $ 692,346    $ 9,598,644     $ 4,649,091
                                                              -------------------------------------------------------------
         Total investment income                                    3,811,291        692,346      9,598,644       4,649,091
                                                              -------------------------------------------------------------

Expenses:
     Mortality risk charge                                           (825,557)      (134,341)      (919,253)       (740,566)
     Expense risk charge                                             (283,279)       (46,097)      (315,430)       (254,116)
     Distribution expense charge                                     (121,406)       (19,756)      (135,184)       (108,907)
                                                              -------------------------------------------------------------
         Total expenses                                            (1,230,242)      (200,194)    (1,369,867)     (1,103,589)
                                                              -------------------------------------------------------------

Net investment income                                               2,581,049        492,152      8,228,777       3,545,502
                                                              -------------------------------------------------------------

Net realized gains (losses) from securities transactions:
     Proceeds from shares sold                                     14,668,753      5,138,858     27,877,400       8,172,002
     Cost of shares sold                                          (12,747,062)    (4,551,662)   (23,186,150)     (6,737,778)
                                                              -------------------------------------------------------------

Net realized gains (losses) from
    securities transactions                                         1,921,691        587,196      4,691,250       1,434,224
                                                              -------------------------------------------------------------

Net unrealized appreciation (depreciation) of investments:
     Beginning of period                                           (2,965,185)       (60,832)      (231,254)     (1,044,342)
     End of period                                                  6,572,612        (44,033)     8,644,860      11,449,965
                                                              -------------------------------------------------------------

Change in net unrealized appreciation/
    depreciation of investments                                     9,537,797         16,799      8,876,114      12,494,307
                                                              -------------------------------------------------------------

Increase in net assets from operations                           $ 14,040,537    $ 1,096,147   $ 21,796,141    $ 17,474,033
                                                              =============================================================
</TABLE>


<TABLE>
<CAPTION>
                                                                   Asset      SunAmerica
                                                              Allocation        Balanced        Utility
                                                               Portfolio       Portfolio      Portfolio
                                                            -------------------------------------------
<S>                                                          <C>               <C>            <C>
Investment income:
     Dividends and capital gains distributions               $ 2,690,646       $ 714,490      $ 621,152
                                                            -------------------------------------------
         Total investment income                               2,690,646         714,490        621,152
                                                            -------------------------------------------

Expenses:
     Mortality risk charge                                      (338,351)       (291,817)       (90,713)
     Expense risk charge                                        (116,101)       (100,133)       (31,127)
     Distribution expense charge                                 (49,758)        (42,915)       (13,340)
                                                            -------------------------------------------
         Total expenses                                         (504,210)       (434,865)      (135,180)
                                                            -------------------------------------------

Net investment income                                          2,186,436         279,625        485,972
                                                            -------------------------------------------

Net realized gains (losses) from securities transactions:
     Proceeds from shares sold                                 8,711,796       2,409,823      5,498,182
     Cost of shares sold                                      (8,976,943)     (2,148,997)    (5,362,158)
                                                            -------------------------------------------

Net realized gains (losses) from
    securities transactions                                     (265,147)        260,826        136,024
                                                            -------------------------------------------

Net unrealized appreciation (depreciation) of investments:
     Beginning of period                                      (3,475,076)        266,853        425,338
     End of period                                            (3,561,452)      3,255,970        (79,294)
                                                            -------------------------------------------

Change in net unrealized appreciation/
    depreciation of investments                                  (86,376)      2,989,117       (504,632)
                                                            -------------------------------------------

Increase in net assets from operations                       $ 1,834,913     $ 3,529,568      $ 117,364
                                                            ===========================================
</TABLE>



                 See accompanying notes to financial statements.

<PAGE>   77

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF OPERATIONS
                               FOR THE YEAR ENDED
                               SEPTEMBER 30, 1999
                                   (Continued)


<TABLE>
<CAPTION>
                                                                    Worldwide     High-Yield         Global       Corporate
                                                                  High Income           Bond           Bond            Bond
                                                                    Portfolio      Portfolio      Portfolio       Portfolio
                                                              -------------------------------------------------------------
<S>                                                                 <C>          <C>              <C>             <C>
Investment income:
     Dividends and capital gains distributions                      $ 647,213    $ 1,675,924      $ 494,869       $ 649,633
                                                              -------------------------------------------------------------
         Total investment income                                      647,213      1,675,924        494,869         649,633
                                                              -------------------------------------------------------------

Expenses:
     Mortality risk charge                                            (55,954)      (169,362)       (63,123)       (129,648)
     Expense risk charge                                              (19,200)       (58,115)       (21,660)        (44,487)
     Distribution expense charge                                       (8,229)       (24,906)        (9,282)        (19,066)
                                                              -------------------------------------------------------------
         Total expenses                                               (83,383)      (252,383)       (94,065)       (193,201)
                                                              -------------------------------------------------------------

Net investment income                                                 563,830      1,423,541        400,804         456,432
                                                              -------------------------------------------------------------

Net realized gains (losses) from securities
  transactions:
     Proceeds from shares sold                                      2,454,771     10,357,597      2,598,910       2,281,322
     Cost of shares sold                                           (2,920,212)   (10,665,697)    (2,585,940)     (2,263,165)
                                                              -------------------------------------------------------------

Net realized gains (losses) from
    securities transactions                                          (465,441)      (308,100)        12,970          18,157
                                                              -------------------------------------------------------------

Net unrealized appreciation (depreciation)
  of investments:
     Beginning of period                                           (1,861,717)    (1,134,646)       224,396         241,873
     End of period                                                 (1,083,742)    (1,790,034)      (356,389)       (630,755)
                                                              -------------------------------------------------------------

Change in net unrealized appreciation/
    depreciation of investments                                       777,975       (655,388)      (580,785)       (872,628)
                                                              -------------------------------------------------------------

Increase (decrease) in net assets from operations                   $ 876,364      $ 460,053     $ (167,011)     $ (398,039)
                                                              =============================================================
</TABLE>



<TABLE>
<CAPTION>
                                                                "Dogs" of             Cash
                                                              Wall Street       Management
                                                                Portfolio        Portfolio           TOTAL
                                                             ---------------------------------------------
<S>                                                             <C>            <C>            <C>
Investment income:
     Dividends and capital gains distributions                  $ 368,835      $ 1,201,668    $ 37,935,370
                                                             ---------------------------------------------
         Total investment income                                  368,835        1,201,668      37,935,370
                                                             ---------------------------------------------

Expenses:
     Mortality risk charge                                       (112,359)        (491,900)     (5,830,930)
     Expense risk charge                                          (38,555)        (168,789)     (2,000,810)
     Distribution expense charge                                  (16,523)         (72,339)       (857,492)
                                                             ---------------------------------------------
         Total expenses                                          (167,437)        (733,028)     (8,689,232)
                                                             ---------------------------------------------

Net investment income                                             201,398          468,640      29,246,138
                                                             ---------------------------------------------

Net realized gains (losses) from securities
  transactions:
     Proceeds from shares sold                                  2,936,659    1,413,237,712   3,306,318,245
     Cost of shares sold                                       (2,840,363)  (1,412,138,272) (3,273,854,716)
                                                             ---------------------------------------------

Net realized gains (losses) from
    securities transactions                                        96,296        1,099,440      32,463,529
                                                             ---------------------------------------------

Net unrealized appreciation (depreciation)
  of investments:
     Beginning of period                                         (636,103)         124,870     (16,931,922)
     End of period                                               (479,290)          75,925      21,610,461
                                                             ---------------------------------------------

Change in net unrealized appreciation/
    depreciation of investments                                   156,813          (48,945)     38,542,383
                                                             ---------------------------------------------

Increase (decrease) in net assets from operations               $ 454,507      $ 1,519,135    $100,252,050
                                                             =============================================
</TABLE>



                 See accompanying notes to financial statements.
<PAGE>   78


                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                               SEPTEMBER 30, 1999

<TABLE>
<CAPTION>
                                                                                                                    Government
                                                                  Capital                            Natural               and
                                                             Appreciation            Growth        Resources      Quality Bond
                                                                Portfolio         Portfolio        Portfolio         Portfolio
                                                         ---------------------------------------------------------------------
<S>                                                           <C>               <C>                   <C>            <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income (loss)                             $ 1,464,146       $ 1,443,755           $ (371)        $ 812,039
     Net realized gains (losses) from
         securities transactions                                7,716,588         1,278,816         (104,993)          124,953
     Change in net unrealized appreciation/
         depreciation of investments                            3,500,320         1,276,947          531,762        (1,440,592)
                                                         ---------------------------------------------------------------------

         Increase (decrease) in net assets from
             operations                                        12,681,054         3,999,518          426,398          (503,600)
                                                         ---------------------------------------------------------------------

From capital transactions:
     Net proceeds from units sold                              11,659,956        10,443,086          563,694        11,241,673
     Cost of units redeemed                                    (2,492,997)       (1,587,647)        (415,964)       (1,829,653)
     Net transfers                                              3,583,785          (953,846)         (84,221)       (1,463,633)
                                                         ---------------------------------------------------------------------

         Increase in net assets
             from capital transactions                         12,750,744         7,901,593           63,509         7,948,387
                                                         ---------------------------------------------------------------------

Increase in net assets                                         25,431,798        11,901,111          489,907         7,444,787
Net assets at beginning of period                              21,145,421        14,054,937        1,729,875        15,974,545
                                                         ---------------------------------------------------------------------
Net assets at end of period                                  $ 46,577,219      $ 25,956,048      $ 2,219,782      $ 23,419,332
                                                         =====================================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                                   425,545           383,934           51,912           831,181
     Units redeemed                                               (90,947)          (59,520)         (37,655)         (135,746)
     Units transferred                                            142,343           (40,459)         (11,525)         (107,687)
                                                         ---------------------------------------------------------------------

Increase in units outstanding                                     476,941           283,955            2,732           587,748
Beginning units                                                 1,017,644           665,205          184,816         1,164,582
                                                         ---------------------------------------------------------------------

Ending units                                                    1,494,585           949,160          187,548         1,752,330
                                                         =====================================================================
</TABLE>


<TABLE>
<CAPTION>
                                                    International
                                                      Diversified            Global       Aggressive
                                                         Equities          Equities           Growth
                                                        Portfolio         Portfolio        Portfolio
                                                    ------------------------------------------------
<S>                                                     <C>             <C>                <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income (loss)                       $ 933,489       $ 2,433,260        $ 845,662
     Net realized gains (losses) from
         securities transactions                       10,298,407         1,740,712        2,189,660
     Change in net unrealized appreciation/
         depreciation of investments                    1,004,464         1,065,639          503,675
                                                    ------------------------------------------------

         Increase (decrease) in net assets from
             operations                                12,236,360         5,239,611        3,538,997
                                                    ------------------------------------------------

From capital transactions:
     Net proceeds from units sold                       5,601,770        15,209,171        5,550,035
     Cost of units redeemed                            (2,030,068)       (1,357,976)        (499,172)
     Net transfers                                     24,885,595         5,904,173       (2,029,613)
                                                    ------------------------------------------------

         Increase in net assets
             from capital transactions                 28,457,297        19,755,368        3,021,250
                                                    ------------------------------------------------

Increase in net assets                                 40,693,657        24,994,979        6,560,247
Net assets at beginning of period                      17,098,161        10,207,031        5,725,095
                                                    ------------------------------------------------
Net assets at end of period                          $ 57,791,818      $ 35,202,010     $ 12,285,342
                                                    ================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                           395,001           738,608          377,923
     Units redeemed                                      (148,884)          (65,282)         (33,386)
     Units transferred                                  2,350,864           333,215         (134,211)
                                                    ------------------------------------------------

Increase in units outstanding                           2,596,981         1,006,541          210,326
Beginning units                                         1,406,772           619,488          563,756
                                                    ------------------------------------------------

Ending units                                            4,003,753         1,626,029          774,082
                                                    ================================================
</TABLE>



                 See accompanying notes to financial statements.
<PAGE>   79


                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                               SEPTEMBER 30, 1999
                                   (Continued)

<TABLE>
<CAPTION>
                                                                  Venture         Federated         Alliance           Growth-
                                                                    Value             Value           Growth            Income
                                                                Portfolio         Portfolio        Portfolio         Portfolio
                                                         ---------------------------------------------------------------------
<S>                                                           <C>                 <C>            <C>               <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                    $ 2,581,049         $ 492,152      $ 8,228,777       $ 3,545,502
     Net realized gains (losses) from
         securities transactions                                1,921,691           587,196        4,691,250         1,434,224
     Change in net unrealized appreciation/
         depreciation of investments                            9,537,797            16,799        8,876,114        12,494,307
                                                         ---------------------------------------------------------------------

         Increase in net assets from operations                14,040,537         1,096,147       21,796,141        17,474,033
                                                         ---------------------------------------------------------------------

From capital transactions:
     Net proceeds from units sold                              22,987,514         4,866,473       44,843,766        32,139,561
     Cost of units redeemed                                    (6,534,403)       (1,187,071)      (6,806,096)       (5,123,126)
     Net transfers                                             (2,186,605)          811,460        7,439,564         4,947,933
                                                         ---------------------------------------------------------------------

         Increase (decrease) in net assets
             from capital transactions                         14,266,506         4,490,862       45,477,234        31,964,368
                                                         ---------------------------------------------------------------------

Increase in net assets                                         28,307,043         5,587,009       67,273,375        49,438,401
Net assets at beginning of period                              58,674,092         8,832,276       44,393,067        42,087,039
                                                         ---------------------------------------------------------------------
Net assets at end of period                                  $ 86,981,135      $ 14,419,285    $ 111,666,442      $ 91,525,440
                                                         =====================================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                                   917,108           292,496        1,155,366         1,102,602
     Units redeemed                                              (260,818)          (71,439)        (175,280)         (176,789)
     Units transferred                                            (91,538)           49,927          221,145           173,547
                                                         ---------------------------------------------------------------------

Increase (decrease) in units outstanding                          564,752           270,984        1,201,231         1,099,360
Beginning units                                                 2,902,818           632,656        1,582,618         1,922,364
                                                         ---------------------------------------------------------------------

Ending units                                                    3,467,570           903,640        2,783,849         3,021,724
                                                         =====================================================================
</TABLE>



<TABLE>
<CAPTION>
                                                                   Asset        SunAmerica
                                                              Allocation          Balanced          Utility
                                                               Portfolio         Portfolio        Portfolio
                                                         --------------------------------------------------
<S>                                                          <C>                 <C>              <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                   $ 2,186,436         $ 279,625        $ 485,972
     Net realized gains (losses) from
         securities transactions                                (265,147)          260,826          136,024
     Change in net unrealized appreciation/
         depreciation of investments                             (86,376)        2,989,117         (504,632)
                                                         --------------------------------------------------

         Increase in net assets from operations                1,834,913         3,529,568          117,364
                                                         --------------------------------------------------

From capital transactions:
     Net proceeds from units sold                              7,623,739        18,767,800        5,158,530
     Cost of units redeemed                                   (3,611,828)       (1,872,035)        (520,170)
     Net transfers                                            (5,431,075)        3,797,583           64,897
                                                         --------------------------------------------------

         Increase (decrease) in net assets
             from capital transactions                        (1,419,164)       20,693,348        4,703,257
                                                         --------------------------------------------------

Increase in net assets                                           415,749        24,222,916        4,820,621
Net assets at beginning of period                             31,224,425        14,618,142        6,246,778
                                                         --------------------------------------------------
Net assets at end of period                                 $ 31,640,174      $ 38,841,058     $ 11,067,399
                                                         ==================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                                  412,851         1,115,508          348,029
     Units redeemed                                             (195,062)         (110,680)         (34,917)
     Units transferred                                          (293,669)          233,771             (260)
                                                         --------------------------------------------------

Increase (decrease) in units outstanding                         (75,880)        1,238,599          312,852
Beginning units                                                1,815,221         1,021,745          440,453
                                                         --------------------------------------------------

Ending units                                                   1,739,341         2,260,344          753,305
                                                         ==================================================
</TABLE>



                 See accompanying notes to financial statements.

<PAGE>   80

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                               SEPTEMBER 30, 1999
                                   (Continued)


<TABLE>
<CAPTION>
                                                                Worldwide        High-Yield           Global         Corporate
                                                              High Income              Bond             Bond              Bond
                                                                Portfolio         Portfolio        Portfolio         Portfolio
                                                         ---------------------------------------------------------------------
<S>                                                             <C>             <C>                <C>               <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                      $ 563,830       $ 1,423,541        $ 400,804         $ 456,432
     Net realized gains (losses) from
         securities transactions                                 (465,441)         (308,100)          12,970            18,157
     Change in net unrealized appreciation/
         depreciation of investments                              777,975          (655,388)        (580,785)         (872,628)
                                                         ---------------------------------------------------------------------

         Increase (decrease) in net assets from
           operations                                             876,364           460,053         (167,011)         (398,039)
                                                         ---------------------------------------------------------------------

From capital transactions:
     Net proceeds from units sold                                 898,942         7,016,765        2,054,007         5,959,933
     Cost of units redeemed                                      (638,930)       (2,197,129)        (993,690)         (782,529)
     Net transfers                                             (1,038,232)       (3,875,030)          55,442          (123,750)
                                                         ---------------------------------------------------------------------

         Increase (decrease) in net assets
             from capital transactions                           (778,220)          944,606        1,115,759         5,053,654
                                                         ---------------------------------------------------------------------

Increase in net assets                                             98,144         1,404,659          948,748         4,655,615
Net assets at beginning of period                               5,242,554        14,772,559        5,278,049         9,803,119
                                                         ---------------------------------------------------------------------
Net assets at end of period                                   $ 5,340,698      $ 16,177,218      $ 6,226,797      $ 14,458,734
                                                         =====================================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                                    65,870           483,445          142,849           457,920
     Units redeemed                                               (45,804)         (150,926)         (69,929)          (60,311)
     Units transferred                                            (77,391)         (261,404)           3,310            (9,809)
                                                         ---------------------------------------------------------------------

Increase (decrease) in units outstanding                          (57,325)           71,115           76,230           387,800
Beginning units                                                   426,276         1,040,736          365,756           743,536
                                                         ---------------------------------------------------------------------

Ending units                                                      368,951         1,111,851          441,986         1,131,336
                                                         =====================================================================
</TABLE>


<TABLE>
<CAPTION>
                                                            "Dogs" of              Cash
                                                          Wall Street        Management
                                                            Portfolio         Portfolio            TOTAL
                                                        -------------------------------------------------
<S>                                                         <C>               <C>           <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                  $ 201,398         $ 468,640     $ 29,246,138
     Net realized gains (losses) from
         securities transactions                               96,296         1,099,440       32,463,529
     Change in net unrealized appreciation/
         depreciation of investments                          156,813           (48,945)      38,542,383
                                                        -------------------------------------------------

         Increase (decrease) in net assets from
           operations                                         454,507         1,519,135      100,252,050
                                                        -------------------------------------------------

From capital transactions:
     Net proceeds from units sold                           4,955,018        70,055,973      287,597,406
     Cost of units redeemed                                (2,213,519)       (6,243,254)     (48,937,257)
     Net transfers                                            818,340       (14,756,024)      20,366,743
                                                        -------------------------------------------------

         Increase (decrease) in net assets
             from capital transactions                      3,559,839        49,056,695      259,026,892
                                                        -------------------------------------------------

Increase in net assets                                      4,014,346        50,575,830      359,278,942
Net assets at beginning of period                           6,869,086        21,573,306      355,549,557
                                                        -------------------------------------------------
Net assets at end of period                              $ 10,883,432      $ 72,149,136    $ 714,828,499
                                                        =================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                               512,293         5,868,418
     Units redeemed                                          (221,004)         (521,183)
     Units transferred                                         85,010        (1,239,771)
                                                        --------------------------------

Increase (decrease) in units outstanding                      376,299         4,107,464
Beginning units                                               787,445         1,832,548
                                                        --------------------------------

Ending units                                                1,163,744         5,940,012
                                                        ================================
</TABLE>



                 See accompanying notes to financial statements.

<PAGE>   81

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                               SEPTEMBER 30, 1998

<TABLE>
<CAPTION>
                                                                                                                    Government
                                                                  Capital                            Natural               and
                                                             Appreciation            Growth        Resources      Quality Bond
                                                                Portfolio         Portfolio        Portfolio         Portfolio
                                                         ---------------------------------------------------------------------
<S>                                                           <C>                 <C>               <C>              <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                    $ 1,651,565         $ 728,920         $ 18,016         $ 484,450
     Net realized gains (losses) from
         securities transactions                                  152,077            75,290          (87,329)           19,743
     Change in net unrealized appreciation/
         depreciation of investments                           (3,737,651)       (1,030,919)        (563,184)          340,934
                                                         ---------------------------------------------------------------------

         Increase (decrease) in net assets from
           operations                                          (1,934,009)         (226,709)        (632,497)          845,127
                                                         ---------------------------------------------------------------------

From capital transactions:
     Net proceeds from units sold                              12,472,504         8,360,104          604,423         8,041,062
     Cost of units redeemed                                    (1,014,818)         (496,594)         (49,767)         (566,849)
     Net transfers                                              1,364,298         1,167,617          198,472         5,654,837
                                                         ---------------------------------------------------------------------

         Increase in net assets
             from capital transactions                         12,821,984         9,031,127          753,128        13,129,050
                                                         ---------------------------------------------------------------------

Increase in net assets                                         10,887,975         8,804,418          120,631        13,974,177
Net assets at beginning of period                              10,257,446         5,250,519        1,609,244         2,000,368
                                                         ---------------------------------------------------------------------
Net assets at end of period                                  $ 21,145,421      $ 14,054,937      $ 1,729,875      $ 15,974,545
                                                         =====================================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                                   537,723           376,091           55,840           619,782
     Units redeemed                                               (43,603)          (21,895)          (4,662)          (43,190)
     Units transferred                                             60,084            52,775           13,485           427,170
                                                         ---------------------------------------------------------------------

Increase in units outstanding                                     554,204           406,971           64,663         1,003,762
Beginning units                                                   463,440           258,234          120,153           160,820
                                                         ---------------------------------------------------------------------

Ending units                                                    1,017,644           665,205          184,816         1,164,582
                                                         =====================================================================
</TABLE>


<TABLE>
<CAPTION>
                                                        International
                                                          Diversified            Global       Aggressive
                                                             Equities          Equities           Growth
                                                            Portfolio         Portfolio        Portfolio
                                                      ---------------------------------------------------
<S>                                                         <C>               <C>              <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                  $ 359,012         $ 554,538        $ (81,182)
     Net realized gains (losses) from
         securities transactions                              281,597            75,779          118,595
     Change in net unrealized appreciation/
         depreciation of investments                       (1,371,454)       (1,899,465)      (1,214,820)
                                                      ---------------------------------------------------

         Increase (decrease) in net assets from
           operations                                        (730,845)       (1,269,148)      (1,177,407)
                                                      ---------------------------------------------------

From capital transactions:
     Net proceeds from units sold                          10,500,385         6,357,054        3,427,880
     Cost of units redeemed                                  (794,529)         (477,519)        (467,004)
     Net transfers                                           (168,007)          797,390         (231,477)
                                                      ---------------------------------------------------

         Increase in net assets
             from capital transactions                      9,537,849         6,676,925        2,729,399
                                                      ---------------------------------------------------

Increase in net assets                                      8,807,004         5,407,777        1,551,992
Net assets at beginning of period                           8,291,157         4,799,254        4,173,103
                                                      ---------------------------------------------------
Net assets at end of period                              $ 17,098,161      $ 10,207,031      $ 5,725,095
                                                      ===================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                               808,866           337,210          291,942
     Units redeemed                                           (60,052)          (25,237)         (39,743)
     Units transferred                                         (6,242)           41,441          (19,974)
                                                      ---------------------------------------------------

Increase in units outstanding                                 742,572           353,414          232,225
Beginning units                                               664,200           266,074          331,531
                                                      ---------------------------------------------------

Ending units                                                1,406,772           619,488          563,756
                                                      ===================================================
</TABLE>



                 See accompanying notes to financial statements.

<PAGE>   82


                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                               SEPTEMBER 30, 1998
                                   (Continued)

<TABLE>
<CAPTION>
                                                                  Venture         Federated         Alliance           Growth-
                                                                    Value             Value           Growth            Income
                                                                Portfolio         Portfolio        Portfolio         Portfolio
                                                         ---------------------------------------------------------------------
<S>                                                             <C>                <C>           <C>                 <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                      $ 938,186          $ 49,437      $ 2,096,529         $ 886,415
     Net realized gains (losses) from
         securities transactions                                   80,640           113,312          304,526            46,547
     Change in net unrealized appreciation/
         depreciation of investments                           (6,811,102)         (443,350)      (2,054,363)       (2,883,757)
                                                         ---------------------------------------------------------------------

         Increase (decrease) in net assets from
           operations                                          (5,792,276)         (280,601)         346,692        (1,950,795)
                                                         ---------------------------------------------------------------------

From capital transactions:
     Net proceeds from units sold                              39,175,536         6,066,490       28,681,526        27,433,749
     Cost of units redeemed                                    (2,730,211)         (467,695)      (2,061,304)       (1,876,485)
     Net transfers                                              3,136,200           568,079        3,645,544         3,012,374
                                                         ---------------------------------------------------------------------

         Increase in net assets
             from capital transactions                         39,581,525         6,166,874       30,265,766        28,569,638
                                                         ---------------------------------------------------------------------

Increase in net assets                                         33,789,249         5,886,273       30,612,458        26,618,843
Net assets at beginning of period                              24,884,843         2,946,003       13,780,609        15,468,196
                                                         ---------------------------------------------------------------------
Net assets at end of period                                  $ 58,674,092       $ 8,832,276     $ 44,393,067      $ 42,087,039
                                                         =====================================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                                 1,733,894           409,276          982,692         1,154,788
     Units redeemed                                              (119,639)          (31,156)         (68,325)          (77,230)
     Units transferred                                            144,279            39,005          126,769           127,347
                                                         ---------------------------------------------------------------------

Increase in units outstanding                                   1,758,534           417,125        1,041,136         1,204,905
Beginning units                                                 1,144,284           215,531          541,482           717,459
                                                         ---------------------------------------------------------------------

Ending units                                                    2,902,818           632,656        1,582,618         1,922,364
                                                         =====================================================================
</TABLE>


<TABLE>
<CAPTION>
                                                                 Asset        SunAmerica
                                                            Allocation          Balanced          Utility
                                                             Portfolio         Portfolio        Portfolio
                                                        --------------------------------------------------
<S>                                                        <C>                  <C>              <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                 $ 2,225,122          $ 96,808         $ 46,367
     Net realized gains (losses) from
         securities transactions                                (1,219)           26,755           47,947
     Change in net unrealized appreciation/
         depreciation of investments                        (4,505,909)          (72,631)         337,140
                                                        --------------------------------------------------

         Increase (decrease) in net assets from
           operations                                       (2,282,006)           50,932          431,454
                                                        --------------------------------------------------

From capital transactions:
     Net proceeds from units sold                           20,890,313        10,179,005        3,867,813
     Cost of units redeemed                                 (1,766,204)         (525,888)        (160,104)
     Net transfers                                           2,437,276         1,815,376          976,787
                                                        --------------------------------------------------

         Increase in net assets
             from capital transactions                      21,561,385        11,468,493        4,684,496
                                                        --------------------------------------------------

Increase in net assets                                      19,279,379        11,519,425        5,115,950
Net assets at beginning of period                           11,945,046         3,098,717        1,130,828
                                                        --------------------------------------------------
Net assets at end of period                               $ 31,224,425      $ 14,618,142      $ 6,246,778
                                                        ==================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                              1,128,513           702,091          285,082
     Units redeemed                                            (95,406)          (36,402)         (11,775)
     Units transferred                                         132,295           122,304           72,387
                                                        --------------------------------------------------

Increase in units outstanding                                1,165,402           787,993          345,694
Beginning units                                                649,819           233,752           94,759
                                                        --------------------------------------------------

Ending units                                                 1,815,221         1,021,745          440,453
                                                        ==================================================
</TABLE>



                 See accompanying notes to financial statements.

<PAGE>   83


                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                               SEPTEMBER 30, 1998
                                   (Continued)


<TABLE>
<CAPTION>
                                                                Worldwide        High-Yield           Global        Corporate
                                                              High Income              Bond             Bond             Bond
                                                                Portfolio         Portfolio        Portfolio        Portfolio
                                                         --------------------------------------------------------------------
<S>                                                             <C>               <C>              <C>               <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                      $ 455,979         $ 490,012        $ 222,710         $ 87,395
     Net realized gains (losses) from
         securities transactions                                 (210,035)          (13,700)          24,460           12,609
     Change in net unrealized appreciation/
         depreciation of investments                           (2,274,316)       (1,429,248)         189,315          191,840
                                                         --------------------------------------------------------------------

         Increase (decrease) in net assets from
           operations                                          (2,028,372)         (952,936)         436,485          291,844
                                                         --------------------------------------------------------------------

From capital transactions:
     Net proceeds from units sold                               3,543,091        12,896,615        2,244,752        7,816,436
     Cost of units redeemed                                      (541,415)         (647,889)        (347,483)        (447,469)
     Net transfers                                               (421,253)       (1,525,504)         827,808          667,899
                                                         --------------------------------------------------------------------

         Increase in net assets
             from capital transactions                          2,580,423        10,723,222        2,725,077        8,036,866
                                                         --------------------------------------------------------------------

Increase in net assets                                            552,051         9,770,286        3,161,562        8,328,710
Net assets at beginning of period                               4,690,503         5,002,273        2,116,487        1,474,409
                                                         --------------------------------------------------------------------
Net assets at end of period                                   $ 5,242,554      $ 14,772,559      $ 5,278,049      $ 9,803,119
                                                         ====================================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                                   216,761           843,632          166,389          607,213
     Units redeemed                                               (34,876)          (42,750)         (25,043)         (34,676)
     Units transferred                                            (35,281)         (101,378)          61,001           51,641
                                                         --------------------------------------------------------------------

Increase in units outstanding                                     146,604           699,504          202,347          624,178
Beginning units                                                   279,672           341,232          163,409          119,358
                                                         --------------------------------------------------------------------

Ending units                                                      426,276         1,040,736          365,756          743,536
                                                         ====================================================================
</TABLE>


<TABLE>
<CAPTION>
                                                               "Dogs" of             Cash
                                                             Wall Street       Management
                                                               Portfolio        Portfolio             TOTAL
                                                        ---------------------------------------------------
<S>                                                            <C>              <C>            <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
     Net investment income                                     $ (27,459)       $ 256,618      $ 11,539,438
     Net realized gains (losses) from
         securities transactions                                  (8,980)           2,002         1,060,616
     Change in net unrealized appreciation/
         depreciation of investments                            (636,103)          89,304       (29,779,739)
                                                        ---------------------------------------------------

         Increase (decrease) in net assets from
           operations                                           (672,542)         347,924       (17,179,685)
                                                        ---------------------------------------------------

From capital transactions:
     Net proceeds from units sold                              7,007,950       28,022,036       247,588,724
     Cost of units redeemed                                      (88,902)      (3,429,704)      (18,957,833)
     Net transfers                                               622,580       (9,279,389)       15,266,907
                                                        ---------------------------------------------------

         Increase in net assets
             from capital transactions                         7,541,628       15,312,943       243,897,798
                                                        ---------------------------------------------------

Increase in net assets                                         6,869,086       15,660,867       226,718,113
Net assets at beginning of period                                      0        5,912,439       128,831,444
                                                        ---------------------------------------------------
Net assets at end of period                                  $ 6,869,086     $ 21,573,306     $ 355,549,557
                                                        ===================================================

ANALYSIS OF INCREASE (DECREASE)
     IN UNITS OUTSTANDING:
     Units sold                                                  731,470        2,415,925
     Units redeemed                                               (9,598)        (295,110)
     Units transferred                                            65,573         (808,419)
                                                        ---------------------------------

Increase in units outstanding                                    787,445        1,312,396
Beginning units                                                        0          520,152
                                                        ---------------------------------

Ending units                                                     787,445        1,832,548
                                                        =================================
</TABLE>



                 See accompanying notes to financial statements.

<PAGE>   84


                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                        NOTES TO THE FINANCIAL STATEMENTS


1.       ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

         Variable Annuity Account Four of Anchor National Life Insurance Company
         (the "Separate Account") is a segregated investment account of Anchor
         National Life Insurance Company (the "Company"). The Company is an
         indirect, wholly owned subsidiary of SunAmerica Inc. Effective January
         1, 1999, SunAmerica Inc. merged with and into American International
         Group, Inc. in a tax-free reorganization that has been treated as a
         pooling of interests for accounting purposes. Immediately prior to the
         merger, SunAmerica Inc. transferred substantially all of its net assets
         to its wholly owned subsidiary SunAmerica Holdings, Inc., a Delaware
         Corporation. On January 4, 1999, SunAmerica Holdings, Inc. changed its
         name to SunAmerica Inc. The Separate Account is registered as a
         segregated unit investment trust pursuant to the provisions of the
         Investment Company Act of 1940, as amended.

         The Separate Account is composed of twenty variable portfolios (the
         "Variable Accounts"). Each of the Variable Accounts is invested solely
         in the shares of either (1) one of the four currently available
         investment portfolios of Anchor Series Trust (the "Anchor Trust") or
         (2) one of the sixteen currently available investment portfolios of
         SunAmerica Series Trust (the "SunAmerica Trust"). The Anchor Trust and
         the SunAmerica Trust (collectively referred to as the "Trusts") are
         diversified, open-end, affiliated investment companies, which retain
         investment advisers to assist in the investment activities of the
         trusts. The participant may elect to have investments allocated to a
         guaranteed-interest fund of the Company (the "General Account"), which
         is not part of the Separate Account. The financial statements include
         balances allocated by the participant to the twenty Variable Accounts
         and do not include balances allocated to the General Account.

         The Variable Accounts became initially available for sale on August 19,
         1996. The inception dates for the twenty individual Portfolios were as
         follows: August 27, 1996 for the Capital Appreciation, Global Equities,
         Venture Value and Worldwide High Income Portfolios; August 29, 1996 for
         the Aggressive Growth Portfolio; September 4, 1996 for the Global Bond
         Portfolio; September 5, 1996 for the Cash Management Portfolio;
         September 6, 1996 for the Growth, Federated Value and Growth-Income
         Portfolios; September 12, 1996 for the Natural Resources, International
         Diversified Equities and Alliance Growth Portfolios; September 16, 1996
         for the Government and Quality Bond, Asset Allocation, SunAmerica
         Balanced and Utility Portfolios; September 23, 1996 for the High-Yield
         Bond and Corporate Bond Portfolios; and April 1, 1998 for the "Dogs" of
         Wall Street Portfolio.


                                       1
<PAGE>   85

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                        NOTES TO THE FINANCIAL STATEMENTS


         ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)

         The investment objectives and policies of the four portfolios of the
         Anchor Trust are summarized below:

         The CAPITAL APPRECIATION PORTFOLIO seeks long-term capital
         appreciation. This portfolio invests in growth equity securities which
         are widely diversified by industry and company using a wide-ranging and
         flexible stock picking approach; may be concentrated and will generally
         have less investments in large company securities than the Growth
         Portfolio.

         The GROWTH PORTFOLIO seeks capital appreciation. This portfolio invests
         in core equity securities that are widely diversified by industry and
         company.

         The NATURAL RESOURCES PORTFOLIO seeks a total return in excess of the
         U.S. rate of inflation as represented by the Consumer Price Index. This
         portfolio invests primarily in equity securities of U.S. or foreign
         companies which are expected to provide favorable returns in periods of
         rising inflation.

         The GOVERNMENT AND QUALITY BOND PORTFOLIO seeks relatively high current
         income, liquidity and security of principal. This portfolio invests in
         obligations issued, guaranteed or insured by the U.S. Government, its
         agencies or instrumentalities and in high quality corporate fixed
         income securities.

         Anchor Trust has portfolios in addition to those identified above,
         however, none of these other portfolios are currently available for
         investment under the Separate Account.

         The investment objectives and policies of the sixteen portfolios of the
         SunAmerica Trust are summarized below:

         The INTERNATIONAL DIVERSIFIED EQUITIES PORTFOLIO seeks long-term
         capital appreciation. This portfolio invests (in accordance with
         country weightings as determined by the Subadviser) in common stocks of
         foreign issuers which, in the aggregate, replicate broad country and
         sector indices.

         The GLOBAL EQUITIES PORTFOLIO seeks long-term growth of capital. This
         portfolio invests primarily in common stocks or securities of U.S. and
         foreign issuers with common stock characteristics which demonstrate the
         potential for appreciation and engages in transactions in foreign
         currencies.


                                       2
<PAGE>   86

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                        NOTES TO THE FINANCIAL STATEMENTS


         ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)

         The AGGRESSIVE GROWTH PORTFOLIO seeks capital appreciation. This
         portfolio invests primarily in equity securities of high growth
         companies including small companies with market capitalizations under
         $1 billion.

         The VENTURE VALUE PORTFOLIO seeks growth of capital. This portfolio
         invests primarily in common stocks of companies with market
         capitalizations of at least $5 billion.

         The FEDERATED VALUE PORTFOLIO seeks growth of capital and income. This
         portfolio invests primarily in the securities of high quality
         companies.

         The ALLIANCE GROWTH PORTFOLIO seeks long-term growth of capital. This
         portfolio invests primarily in equity securities of a limited number of
         large, carefully selected, high quality U.S. companies that are judged
         likely to achieve superior earnings.

         The GROWTH-INCOME PORTFOLIO seeks growth of capital and income. This
         portfolio invests primarily in common stocks or securities which
         demonstrate the potential for appreciation and/or dividends.

         The ASSET ALLOCATION PORTFOLIO seeks high total return (including
         income and capital gains) consistent with preservation of capital over
         the long term. This portfolio invests in a diversified selection of
         common stocks and other securities having common stock characteristics,
         bonds and other intermediate and long-term fixed-income securities and
         money market instruments (debt securities maturing in one year or less)
         in any combination.

         The SUNAMERICA BALANCED PORTFOLIO seeks to conserve principal. This
         portfolio maintains at all times a balanced portfolio of stocks and
         bonds, with at least 25% invested in fixed income securities.

         The UTILITY PORTFOLIO seeks high current income and moderate capital
         appreciation. This portfolio invests primarily in the equity and debt
         securities of utility companies.

         The WORLDWIDE HIGH INCOME PORTFOLIO seeks high current income and,
         secondarily, capital appreciation. This portfolio invests primarily in
         a selection of high-yielding fixed-income securities of issuers located
         throughout the world.


                                       3
<PAGE>   87

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                        NOTES TO THE FINANCIAL STATEMENTS


         ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)

         The HIGH-YIELD BOND PORTFOLIO seeks a high level of current income and,
         secondarily, seeks capital appreciation. This portfolio invests
         primarily in intermediate and long-term corporate obligations, with
         emphasis on higher-yielding, higher-risk, lower-rated or unrated
         securities with a primary focus on "B" rated high-yield bonds.

         The GLOBAL BOND PORTFOLIO seeks a high total return, emphasizing
         current income and, to a lesser extent, providing opportunities for
         capital appreciation. This portfolio invests in high quality
         fixed-income securities of U.S. and foreign issuers and engages in
         transactions in foreign currencies.

         The CORPORATE BOND PORTFOLIO seeks a high total return with only
         moderate price risk. This portfolio invests primarily in investment
         grade fixed-income securities.

         The "DOGS" OF WALL STREET PORTFOLIO seeks total return (including
         capital appreciation and current income) primarily through the annual
         selection of thirty high dividend yielding common stocks from the Dow
         Jones Industrial Average and the broader market.

         The CASH MANAGEMENT PORTFOLIO seeks high current yield while preserving
         capital. This portfolio invests in a diversified selection of money
         market instruments.

         SunAmerica Trust has portfolios in addition to those identified above,
         however, none of these other portfolios are currently available for
         investment under the Separate Account.

         Purchases and sales of shares of the portfolios of the Trusts are
         valued at the net asset values of the shares on the date the shares are
         purchased or sold. Dividends and capital gains distributions are
         recorded when received. Realized gains and losses on the sale of
         investments in the Trusts are recognized at the date of sale and are
         determined on an average cost basis.

         Accumulation unit values are computed daily based on the total net
         assets of the Variable Accounts.


                                       4
<PAGE>   88


                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                        NOTES TO THE FINANCIAL STATEMENTS


2.       CHARGES AND DEDUCTIONS

         There are no withdrawal charges and no contract maintenance charges.
         Other charges and deductions are applied against the current value of
         the Separate Account and are paid as follows:

         TRANSFER FEE: A transfer fee of $25 ($10 in Pennsylvania and Texas) is
         assessed on each transfer of funds in excess of fifteen transactions
         within a contract year.

         PREMIUM TAXES: Premium taxes or other taxes payable to a state or other
         governmental entity will be charged against contract values. Some
         states assess premium taxes at the time purchase payments are made;
         others assess premium taxes at the time annuity payments begin. The
         Company's current practice is to delay charging for these taxes until
         annuity payments begin or a full surrender is made. In the future, the
         Company may discontinue this practice and assess the tax when it is due
         or upon the payment of the death benefit.

         MORTALITY AND EXPENSE RISK CHARGE: The Company deducts mortality and
         expense risk charges, which total to an annual rate of 1.37% of the net
         asset value of each portfolio, computed on a daily basis. The mortality
         risk charge is compensation for the mortality risks assumed by the
         Company from its contractual obligations to make annuity payments after
         the contract has annuitized for the life of the annuitant, to waive the
         withdrawal charge in the event of the death of the participant and to
         provide both a standard and an enhanced death benefit if the
         participant dies prior to the date annuity payments begin. The expense
         risk charge is compensation for the risk assumed by the Company that
         the cost of administering the contracts will exceed the current
         charges.

         DISTRIBUTION EXPENSE CHARGE: The Company deducts a distribution expense
         charge at an annual rate of 0.15% of the net asset value of each
         portfolio, computed on a daily basis. The distribution expense charge
         is for all expenses associated with the distribution of the contract.

         SEPARATE ACCOUNT INCOME TAXES: The Company currently does not maintain
         a provision for taxes, but has reserved the right to establish such a
         provision for taxes in the future if it determines, in its sole
         discretion, that it will incur a tax as a result of the operation of
         the Separate Account.


                                       5
<PAGE>   89

                          VARIABLE ANNUITY ACCOUNT FOUR
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                        NOTES TO THE FINANCIAL STATEMENTS


3.       INVESTMENT IN ANCHOR TRUST AND SUNAMERICA  TRUST

         The aggregate cost of shares acquired and the aggregate proceeds from
         shares sold during the year ended September 30, 1999 consist of the
         following:

<TABLE>
<CAPTION>
                                                                 Cost of Shares                 Proceeds from
         Variable Account                                              Acquired                   Shares Sold
         ----------------                                        --------------                 -------------
<S>                                                               <C>                           <C>
         ANCHOR TRUST
         Capital Appreciation Portfolio                           $  95,312,759                 $  81,097,869

         Growth Portfolio                                            22,262,559                    12,917,211
         Natural Resources Portfolio                                  4,397,286                     4,334,148
         Government & Quality Bond Portfolio                         24,540,028                    15,779,602

         SUNAMERICA TRUST
         International Diversified Equities Portfolio             1,354,487,558                 1,325,096,772
         Global Equities Portfolio                                  356,805,249                   334,616,621
         Aggressive Growth Portfolio                                 29,999,149                    26,132,237
         Venture Value Portfolio                                     31,516,308                    14,668,753
         Federated Value Portfolio                                   10,121,872                     5,138,858
         Alliance Growth Portfolio                                   81,583,411                    27,877,400
         Growth-Income Portfolio                                     43,681,872                     8,172,002
         Asset Allocation Portfolio                                   9,479,068                     8,711,796
         SunAmerica Balanced Portfolio                               23,382,796                     2,409,823
         Federated Utility Portfolio                                 10,687,411                     5,498,182
         Worldwide High Income Portfolio                              2,240,381                     2,454,771
         High Yield Bond Portfolio                                   12,725,744                    10,357,597
         Global Bond Portfolio                                        4,115,473                     2,598,910
         Corporate Bond Portfolio                                     7,791,408                     2,281,322
         "Dogs" of Wall Street Portfolio                              6,697,896                     2,936,659
         Cash Management Portfolio                                1,462,763,047                 1,413,237,712
</TABLE>


4.       FEDERAL INCOME TAXES

         The Company qualifies for federal income tax treatment granted to life
         insurance companies under subchapter L of the Internal Revenue Service
         Code (the "Code"). The operations of the Separate Account are part of
         the total operations of the Company and are not taxed separately. The
         Separate Account is not treated as a regulated investment company under
         the Code.


                                       6
<PAGE>   90
                           PART C - OTHER INFORMATION
                           --------------------------

Item 24.  Financial Statements and Exhibits
- --------  ---------------------------------

(a)      Financial Statements
         --------------------

         The following financial statements are included in Part A of the
Registration Statement:

         None.

         The following financial statements are included in Part B of the
Registration Statement:
         Consolidated Financial Statements of Anchor National Life Insurance
         Company for the fiscal year ended September 30, 1998
         Audited transition report for Anchor National Life Insurance Company
         for the period covering October 1, 1998 - December 31, 1998

         Financial Statements of Variable Annuity Account Four for the
         year-ended September 30, 1999


 (b)     Exhibits
         --------

         (1)  Resolutions Establishing Separate Account ..  *
         (2)  Custody Agreement ..........................  Not Applicable
         (3)  (a) Form of Distribution Contract ..........  *
              (b) Form of Selling Agreement ..............  *
         (4)  Variable Annuity Contract ..................  *
         (5)  Application for Contract ...................  *
         (6)  Depositor - Corporate Documents
              (a) Certificate of Incorporation ...........  *
              (b) By-Laws.................................  *
         (7)  Reinsurance Contract .......................  Not Applicable
         (8)  Form of Fund Participation Agreement .......  *
         (9)  Opinion of Counsel .........................  *
              Consent of Counsel..........................  *
         (10) Consent of Accountants......................  Filed Herewith
         (11) Financial Statements Omitted from Item 23 ..  None
         (12) Initial Capitalization Agreement ...........  Not Applicable
         (13) Performance Computations ...................  Not Applicable
         (14) Diagram and Listing of All Persons Directly
               or Indirectly Controlled By or Under Common
               Control with Anchor National Life Insurance
               Company, the Depositor of Registrant ......  Previously Filed in
                                                            Registration
                                                            No. 001-08787,
                                                            Form 10K on
                                                            March 30, 1999
         (15) Powers of Attorney..........................  *
         (27) Financial Data Schedules ...................  Not Applicable


* Previously Filed in Post-Effective Amendment Number 3 & 4 to this
  Registration Statement.

Item 25.  Directors and Officers of the Depositor
- -------------------------------------------------

        The officers and directors of Anchor National Life Insurance Company are
listed below. Their principal business address is 1 SunAmerica Center, Los
Angeles, California 90067-6022, unless otherwise noted.


<TABLE>
<CAPTION>
Name                                Position
<S>                          <C>
Eli Broad                    Chairman, President and
                               Chief Executive Officer
Jay S. Wintrob               Director and Executive Vice President
Peter McMillan               Director
James R. Belardi             Director and Senior Vice President
Susan L. Harris              Director, Senior Vice President
                               and Secretary
Jana W. Greer                Director and Senior Vice President
Scott L. Robinson            Director and Senior Vice President
Marc H. Gamsin               Director and Senior Vice President
N. Scott Gillis              Senior Vice President and Controller
Edwin R. Raquel              Senior Vice President and Chief Actuary
David R. Bechtel             Vice President and Treasurer
J. Franklin Grey             Vice President
Edward P. Nolan*             Vice President
Greg Outcalt                 Vice President
Scott H. Richland            Vice President
P. Daniel Demko, Jr.         Vice President
Kevin J. Hart                Vice President
</TABLE>



- ------------
* 88 Bradley Road, P.O. Box 4005, Woodbridge, Connecticut 06525

<PAGE>   91


Item 26.  Persons Controlled By or Under Common Control With Depositor
          or Registrant
- ----------------------------------------------------------------------


         The Registrant is a separate account of Anchor National Life Insurance
         Company (Depositor). For a complete listing and diagram of all persons
         directly or indirectly controlled by or under common control with the
         Depositor or Registrant, see Exhibit 14 of the Initial Registration
         Statement of Variable Annuity Account Seven and Anchor National Life
         Insurance Company (File Nos. 333-65965 and 811-09003)(N-4) and
         (333-65963)(S-1), which is incorporated herein by reference. As of
         January 4, 1999, Anchor National became an indirect wholly-owned
         subsidiary of American International Group, Inc. ("AIG"). An
         organizational chart for AIG can be found in Form 10-K, SEC file
         number 001-08787 filed March 31, 1999.



Item 27.  Number of Contract Owners
- -----------------------------------
         As of September 30, 1998, the number of Contracts funded by Variable
         Annuity Account Four of Anchor National Life Insurance Company was 5331
         of which 1493 were Qualified Contracts and 3838 were Nonqualified
         Contracts.

Item 28.  Indemnification
- -------------------------

         None.


Item 29.  Principal Underwriter
- -------------------------------

         SunAmerica Capital Services, Inc. serves as distributor to the
         Registrant.

         Its principal business address is 733 Third Avenue, 4th Floor, New
         York, New York 10017. The following are the directors and officers of
         SunAmerica Capital Services, Inc.


<TABLE>
<CAPTION>
         Name                       Position with Distributor
         ----                       -------------------------
<S>                                 <C>
         J. Steven Neamtz                   Director & President
         Robert M. Zakem                    Director, Executive Vice President,
                                            General Counsel & Assistant Secretary
         Peter Harbeck                      Director
         Debbie Petash-Turner               Controller
         James Nichols                      Vice President
         Susan L. Harris                    Secretary
</TABLE>


<TABLE>
                      Net Distribution               Compensation on
  Name of               Discounts and                 Redemption or             Brokerage
Distributor              Commissions                  Annuitization             Commissions          Commissions*
- -----------           ----------------               ----------------           -----------          ------------
<S>                   <C>                            <C>                        <C>                  <C>
SunAmerica Capital    None                             None                       None                  None
 Services, Inc.
</TABLE>

- ----------------
*Distribution fee is paid by Anchor National Life Insurance Company.


SunAmerica Capital Services, Inc. also acts as the principal underwriter:

    - Variable Separate Account
    - Variable Annuity Account One
    - Presidential Variable Account One
    - FS Variable Separate Account
    - FS Variable Annuity Account One
    - Variable Annuity Account Five
    - Variable Annuity Account Seven
    - SunAmerica Income Funds
    - SunAmerica Equity Funds
    - SunAmerica Money Market Funds, Inc.
    - Style Select Series, Inc.
    - SunAmerica Strategic Investment Series, Inc.


Item 30.   Location of Accounts and Records
- -------------------------------------------

         Anchor National Life Insurance Company, the Depositor for the
         Registrant, is located at 1 SunAmerica Center, Los Angeles,


<PAGE>   92
         California 90067-6022. SunAmerica Capital Services, Inc., the
         distributor of the Contracts, is located at 733 Third Avenue, 4th
         Floor, New York, New York 10017. Each maintains those accounts and
         records required to be maintained by it pursuant to Section 31(a) of
         the Investment Company Act and the rules promulgated thereunder.

         State Street Bank and Trust Company, 225 Franklin Street, Boston,
         Massachusetts 02100, maintains certain accounts and records pursuant to
         the instructions of the Registrant.


Item 31.  Management Services
- -----------------------------

         Not Applicable.


<PAGE>   93
Item 32.  Undertakings
- ----------------------

         Registrant undertakes to (1) file post-effective amendments to this
         Registration Statement as frequently as is necessary to ensure that the
         audited financial statements in the Registration Statement are never
         more than 16 months old for so long as payments under the variable
         annuity Contracts may be accepted; (2) include either (A) as part of
         any application to purchase a Contract offered by the prospectus
         forming a part of the Registration Statement, a space that an applicant
         can check to request a Statement of Additional Information, or (B) a
         postcard or similar written communication affixed to or included in the
         Prospectus that the Applicant can remove to send for a Statement of
         Additional Information; and (3) deliver any Statement of Additional
         Information and any financial statements required to be made available
         under this Form N-4 promptly upon written or oral request.

Item 33. Representation
- -----------------------

         A.  The Company hereby represents that it is relying upon a No-Action
         Letter issued to the American Council of Life Insurance dated November
         28, 1988 (Commission ref. IP-6-88) and that the following provisions
         have been complied with:

              1.  Include appropriate disclosure regarding the redemption
                  restrictions imposed by Section 403(b)(11) in each
                  registration statement, including the prospectus, used in
                  connection with the offer of the contract;

              2.  Include appropriate disclosure regarding the redemption
                  restrictions imposed by Section 403(b)(11) in any sales
                  literature used in connection with the offer of the contract;

              3.  Instruct sales representatives who solicit participants to
                  purchase the contract specifically to bring the redemption
                  restrictions imposed by Section 403(b)(11) to the attention of
                  the potential participants;

              4.  Obtain from each plan participant who purchases a
                  Section 403(b) annuity contract, prior to or at the
                  time of such purchase, a signed statement
                  acknowledging the participant's understanding of
                  (1) the restrictions on redemption imposed by
                  Section 403(b)(11), and (2) other investment
                  alternatives available under the employer's Section
                  403(b) arrangement to which the participant may
                  elect to transfer his contract value.

     B.  REPRESENTATION PURSUANT TO SECTION 26(e) OF THE INVESTMENT COMPANY ACT
         OF 1940: The Company and Registrant represent that the fees and charges
         to be deducted under the variable annuity contract described in the
         prospectus contained in this registration statement are, in the
         aggregate, reasonable in relation to the services rendered, the
         expenses expected to be incurred, and the risks assumed in connection
         with the contract.

<PAGE>   94

                                   SIGNATURES


         As required by the Securities Act of 1933 and the Investment Company
Act of 1940, the Registrant certifies that it meets the requirements of
Securities Act Rule 485 for effectiveness of this Registration Statement and has
caused this Post-Effective Amendment to the Registration Statement to be signed
on its behalf, in the City of Los Angeles, and the State of California, on this
29 day of December, 1999.


                           VARIABLE ANNUITY ACCOUNT FOUR
                                    (Registrant)

                           By: ANCHOR NATIONAL LIFE INSURANCE COMPANY
                                    (Depositor)


                           By: /s/ JAY S. WINTROB
                              -----------------------------------------
                                   Jay S. Wintrob
                                   Executive Vice President

                           By: ANCHOR NATIONAL LIFE INSURANCE COMPANY
                               (Depositor, on behalf of itself and Registrant)


                           By: /s/ JAY S. WINTROB
                              -------------------------------------------
                                    Jay S. Wintrob
                                    Executive Vice President

         As required by the Securities Act of 1933, this Post-Effective
Amendment to the Registration Statement has been signed by the following persons
in the capacities and on the dates indicated.


<TABLE>
<CAPTION>
SIGNATURE                  TITLE                            DATE
- ---------                  -----                            ----
<S>                        <C>                              <C>
ELI BROAD*                 President, Chief
- --------------------       Executive Officer and
Eli Broad                  Chairman  of the Board
                           (Principal Executive
                               Officer)


SCOTT L. ROBINSON*         Senior Vice President
- --------------------           and Director
Scott L. Robinson          (Principal Financial
                               Officer)


N. SCOTT GILLIS*           Senior Vice President
- --------------------           and Controller
N. Scott Gillis            (Principal Accounting
                               Officer)


JAMES R. BELARDI*          Director
- --------------------
James R. Belardi



JANA W. GREER*             Director
- --------------------
Jana W. Greer


/s/ SUSAN L. HARRIS        Director                         December 29, 1999
- --------------------
Susan L. Harris
</TABLE>




<PAGE>   95

<TABLE>
<CAPTION>
SIGNATURE                       TITLE                            DATE
- ---------                       -----                            ----
<S>                           <C>                              <C>


PETER MCMILLAN*                Director
- --------------------
Peter McMillan


JAY S. WINTROB*                Director
- --------------------
Jay S. Wintrob


JAMES W. ROWAN*                Director
- ---------------------
James W. Rowan


</TABLE>



* By: /s/ SUSAN L. HARRIS      Attorney-in-Fact
     ----------------------
        Susan L. Harris

Date:  December 29, 1999



** KNOW ALL PERSONS BY THESE PRESENTS, that the person whose signature appears
below hereby constitutes and appoints SUSAN L. HARRIS AND CHRISTINE A. NIXON or
each of them, as his true and lawful attorneys-in-fact and agents, with full
power of substitution and resubstitution, for him and in his name, place and
stead, in any and all capacities, to sign any and all amendments (including
post-effective amendments) to this Registration Statement, and to file the same,
with all exhibits thereto, and other documents in connection therewith, as fully
to all intents as he might or could do in person, including specifically, but
without limiting the generality of foregoing, to (i) take any action to comply
with any rules, regulations or requirements of the Securities and Exchange
Commission under the federal securities laws; (ii) make application for and
secure any exemptions from the federal securities laws; (iii) register
additional annuity contracts under the federal securities laws, if registration
is deemed necessary. The undersigned hereby ratifies and confirms all that said
attorneys-in-fact and agents or any of them, or their substitutes, shall do or
cause to be done by virtue thereof.




<TABLE>
<S>                           <C>                           <C>
**/s/ MARC H. GAMSIN          Director                      December 29, 1999
- ------------------------
Marc H. Gamsin
</TABLE>


<PAGE>   96
                           EXHIBIT INDEX
                           -------------


<TABLE>
<CAPTION>
Exhibit           Description
- -------           -----------
<S>               <C>

(10)              Consent of Accountants
</TABLE>






<PAGE>   1




                       CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the use in the Statement of Additional Information
constituting part of this Registration Statement on Form N-4 for Variable
Annuity Account Four of Anchor National Life Insurance Company of our report
dated November 19, 1999 and November 9, 1998 relating to the consolidated
financial statements of Anchor National Life Insurance Company, and of our
report dated December 21, 1999, relating to the financial statements of
Variable Annuity Account Four, which appear in such Statement of Additional
Information, and to the incorporation by reference of our report into the
Prospectus which constitutes part of this Registration Statement. We also
consent to the reference to us under the heading "Financial Statements" in such
Statement of Additional Information.



/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP
Los Angeles, California
December 29, 1999



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