BT INVESTMENT FUNDS
N-30D, 2000-05-31
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[Deutsche Asset Management logo omitted]

[graphic omitted]

Mutual Fund
Semi-Annual Report
March 31, 2000

PreservationPlus Income
Formerly BT PreservationPlus Income Fund

[Deutsche Bank Group omitted]

                                     <PAGE>

PreservationPlus Income
--------------------------------------------------------------------------------
TABLE OF CONTENTS

LETTER TO SHAREHOLDERS...................................................     3

PRESERVATIONPLUS INCOME
    Statement of Assets and Liabilities...................................    7
    Statement of Operations...............................................    8
    Statements of Changes in Net Assets...................................    9
    Financial Highlights..................................................   10
    Notes to Financial Statements.........................................   11

PRESERVATIONPLUS INCOME PORTFOLIO
    Schedule of Portfolio Investments.....................................   13
    Statement of Assets and Liabilities...................................   15
    Statement of Operations...............................................   16
    Statements of Changes in Net Assets...................................   17
    Financial Highlights..................................................   18
    Notes to Financial Statements.........................................   19


            ---------------------------------------------------------
            The Fund is not insured by the FDIC and is not a deposit,
            obligation of or guaranteed by Deutsche Bank. The Fund is
            subject to investment  risks, including  possible loss of
            principal amount invested.
            ---------------------------------------------------------

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                                        2

                                     <PAGE>

PreservationPlus Income
--------------------------------------------------------------------------------
LETTER TO SHAREHOLDERS

We are pleased to present you with this semi-annual report for  PreservationPlus
Income  Fund (the  "Fund"),  providing  a  detailed  review of the  market,  the
Portfolio,  and our outlook.  Included are a complete  financial  summary of the
Fund's operations and a listing of the Portfolio's holdings.

The name of the Fund has  changed to  PreservationPlus  Income,  to reflect  the
acquisition of Bankers Trust by Deutsche Bank. The Fund's investment objectives,
policies and strategies, as well as its portfolio managers, remain the same.

The Fund was the first SEC registered  mutual fund  specifically  designed as an
investment  alternative for individuals  with IRAs previously  invested in money
market funds,  savings  accounts and CDs,1 as well as rollovers from  retirement
programs  invested in traditional  GIC  commingled  funds and other stable value
products.  Until this Fund was introduced in December 1998, the only alternative
retirement  plan  rollovers had for their  conservative  stable value assets was
money  market  funds.  The Fund seeks to deliver  returns  above  those of money
market funds while  maintaining a constant  share price.  The Fund is offered to
Traditional IRAs, Roth IRAs,  Education IRAs,  Simplified  Employee Pension IRAs
(SEP IRAs),  Savings  Incentive Match Plan for employees  (SIMPLE IRAs),  401(k)
plans, and Keogh plans.

MARKET ACTIVITY
OVERALL,  THE U.S. BOND MARKET WAS DOMINATED BY THREE  ADDITIONAL  INTEREST RATE
HIKES BY THE FEDERAL RESERVE BOARD DURING THE SIX MONTHS ENDED MARCH 31, 2000. o
The U.S.  economy remained vibrant with GDP growth in excess of 7% in the fourth
quarter of 1999, its fastest pace in almost sixteen years, and what is estimated
to be more than 5% in the first  quarter of 2000.  But the GDP deflator  rose by
less than 2%, lower than expected, suggesting overall inflation remained benign.
Crude oil prices reached a high of $35/barrel  but,  following an agreement with
OPEC,  declined to $27/barrel by the end of the semi-annual period. o Still, the
Federal  Reserve  Board  argued  that  the  pace  of the  economy  could  not be
indefinitely  supported  by labor  force  growth and  productivity  and thus may
rekindle inflation. It continued tightening monetary policy.

<TABLE>
<CAPTION>
                                                             CUMULATIVE                      AVERAGE ANNUAL
                                                           TOTAL RETURNS                     TOTAL RETURNS
  Periods ended                                    Past         Past          Since         Past          Since
  March 31, 2000                               6 months       1 year      inception(4)    1 year      inception(4)
-----------------------------------------------------------------------------------------------------------------
 <S>                                              <C>          <C>            <C>          <C>            <C>
 PreservationPlus Income(2)
  (inception 12/23/98)                            3.20%        6.34%          7.80%        6.34%          6.09%
-----------------------------------------------------------------------------------------------------------------
 Lehman 1-3 Year Government/
   Corporate Index(3) (since 12/31/98)            1.89%         3.72%         4.46%         3.72%        3.55%
-----------------------------------------------------------------------------------------------------------------
 Wrapped Lehman Intermediate
   Aggregate Index(3) (since 12/31/98)            2.85%         5.68%         7.08%         5.68%        5.63%
-----------------------------------------------------------------------------------------------------------------
 iMoneyNet First Tier Retail Money
   Fund Universe(3) (since 12/31/98)              2.55%         4.82%         5.94%         4.82%        4.72%
-----------------------------------------------------------------------------------------------------------------
<FN>
(1) Unlike CDs and bank savings accounts, shares of the Fund are not deposits or
    obligations  of, or  guaranteed by any bank and the shares are not federally
    insured or guaranteed by the U.S. government,  the Federal Deposit Insurance
    Corporation, the Federal Reserve Board or any other agency.
(2) PAST PERFORMANCE IS NOT INDICATIVE OF FUTURE RESULTS.  Investment return and
    principal  value  of  the  funds  will  fluctuate  so  that  when  redeemed,
    investor's  shares  may be worth  more or less  than  their  original  cost.
    Returns  would have been lower during the  specified  period if certain fees
    and  expenses  had  not  been  waived  by  the  Fund.   Performance  assumes
    reinvestment  of  dividends  and capital  gain  distributions  excluding  3%
    maximum  redemption  fee.  The Fund seeks to maintain a constant  $10.00 per
    share net asset value. The Fund is not a money market fund, and there can be
    no assurance that it will be able to maintain a stable share value. The Fund
    will hold  fixed  income  securities,  money  market  instruments,  futures,
    options, and other instruments,  and contracts with financial  institutions,
    such as insurance  companies  and banks that are  intended to stabilize  the
    value per share. Advance notice of plan withdrawal may be necessary to avoid
    a redemption fee (see the Fund's  prospectus for details).
(3) In  addition  to  the  iMoneyNet  Fund  Average,   we  use  two  alternative
    benchmarks.  The Lehman 1 to 3 Year Government/Corporate  Index, our primary
    benchmark,  is an  unmanaged  total  return  index  consisting  of all  U.S.
    Government agency securities,  U.S. Government Treasury securities,  and all
    investment  grade  corporate debt securities with maturities of one to three
    years. The Wrapped Lehman Intermediate Aggregate Index is an unmanaged index
    that closely reflects the market sectors in which the Fund  invests.IBCFirst
    Tier Retail Money Fund  Universe  changed its name to  iMoneyNet  First Tier
    Retail Money Fund Universe.
(4) The  benchmarks  for the Since  Inception  time period are  calculated  from
    December 31, 1998.
</FN>
</TABLE>

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                                        3

                                     <PAGE>

PreservationPlus Income
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LETTER TO SHAREHOLDERS

PORTFOLIO DIVERSIFICATION
By Theme as of March 31, 2000 (percentages are based on market value)

 Money Market Fund .....................       31.95%

 Mortgage Backed........................       25.91

 Financial Services.....................       16.09

 Asset Backed...........................        9.82

 Other..................................        7.33

 Industrial.............................        4.29

 Utilities..............................        2.19

 Foreign Debt...........................        1.32

 U.S. Treasury Bills....................        0.81

 U.S. Treasury..........................        0.29

o For the six-month  period,  the 2-year and 5-year U.S. Treasury yields rose by
  0.88% and 0.56%,  respectively.  But the 30-year Treasury rallied, with yields
  declining   by   0.22%.   Yield   spreads   widened   for  all  three  of  the
  credit-dependent  "spread sectors," (i.e. corporate mortgage and asset-backed)
  primarily as a result of a flight to quality that favored U.S. Treasuries.

DURING THE FOURTH  QUARTER OF 1999,  THE FEDERAL  RESERVE BOARD  FOLLOWED UP ITS
JUNE 30 AND AUGUST 24 RATE HIKES BY RAISING THE FED FUNDS RATE BY ANOTHER  0.25%
ON NOVEMBER 16TH IN AN ATTEMPT TO REIN IN ECONOMIC  GROWTH AND KEEP INFLATION IN
CHECK.
o U.S.  Treasuries  suffered and yields rose,  as  investors  grew  increasingly
  concerned  over the ongoing  extraordinary  performance  of the U.S.  economy,
  expectations of further Fed tightening,  and liquidity  shortages  surrounding
  the Y2K  phenomenon.  Yields on the 5-year  Treasury note ended the quarter up
  0.59% to a level of 6.34%, and the 30-year Treasury yield rose 0.43% to 6.48%.
  The U.S. Treasury market returned -0.75% for the quarter.
o In contrast,  the "spread sectors"  benefited from the strength of the economy
  and experienced  positive  relative  performance.  The increase in the general
  level of  interest  rates,  a  reduction  in  volatility,  and a  slowdown  in
  prepayments benefited mortgage securities.  Asset-backed  securities benefited
  as increased  investor  demand  wrestled  with  favorable  supply  technicals.
  Investment  grade  corporate  bonds posted the best excess return  performance
  since  1991  on  the  U.S.'  economic   strength.   For  the  fourth  quarter,
  mortgage-backed  securities,   asset-backed  securities  and  corporate  bonds
  recorded positive returns of 0.38%, 0.27% and 0.03%, respectively.

DURING THE FIRST QUARTER OF 2000,  THE FEDERAL  RESERVE BOARD RAISED RATES AGAIN
ON  FEBRUARY 2 AND MARCH 21 BY  ANOTHER  0.25% EACH  TIME,  AND  LONG-TERM  U.S.
TREASURIES IN  PARTICULAR  BENEFITED  FROM SEVERAL  UNEXPECTED  CHANGES.
o U.S.  Treasury bonds gained the most during the first quarter than they had in
  more than a decade,  with a return of 3.79%. This outperformance was primarily
  triggered by three factors.  First, the U.S.  Treasury market benefited from a
  flight to quality based on high  volatility  within the global equity markets,
  especially at the end of March.  Second,  the flight to quality was buttressed
  by concerns  regarding  a pull-back  of the credit line from what are known as
  Government Sponsored Entities, i.e. the U.S. agency sector of the fixed income
  market.  Third, the U.S. Treasury  announced its decision to reduce the number
  of auctions held and to institute a buyback program, whereby the U.S. Treasury
  would buy back its own 30-year issues with budget surplus  monies.  The result
  was a  perceived  scarcity  value-and a rally-for  U.S.  Treasuries.
o Still, yields were mixed with the 30-year Treasury bond declining by 0.65% but
  the 2-year Treasury note yield rising by 0.25%. This caused the Treasury yield
  curve to invert.
o The  "spread  sectors"  had  positive   nominal  returns  but   underperformed
  comparable  duration  Treasuries.  Asset-backed  securities,   mortgage-backed
  securities and corporate bonds returned 1.52%, 1.38% and 1.43%,  respectively,
  for the quarter.

INVESTMENT REVIEW
THE FUND IS INVESTED  ACROSS MAJOR SECTORS OF THE INVESTMENT  GRADE FIXED INCOME
MARKET. As of March 31, 2000, the portfolio is allocated 30% to corporate bonds,
26% to mortgage-backed  securities,  10% to asset-backed securities,  1% to U.S.
Treasuries/agencies,  1% to  foreign  debt  and  32% to cash  equivalents.  This
allocation of fixed income  securities  is  intentionally  weighted  towards the
corporate  and mortgage  sectors,  as these  sectors have  historically  offered
higher yields than U.S. government securities.  The Fund has employed its Global
Asset Allocation (GAA) overlay strategy, which evaluates equity, bond, cash, and
currency opportunities across

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                                        4

                                     <PAGE>

 PreservationPlus Income
--------------------------------------------------------------------------------
 LETTER TO SHAREHOLDERS

domestic  and  international  markets.  Additionally,  the Fund has entered into
Wrapper Agreements that are intended to stabilize the Fund's NAV.

During the first  quarter of 2000,  the  Portfolio  received  subscriptions  for
approximately  $97 million.  Depositing the money in this high rate  environment
caused the yield of the Fund to increase by approximately 0.12%.

THE FUND IS THE FIRST SEC  REGISTERED  MUTUAL FUND FOR IRA INVESTORS TO MAKE USE
OF WRAPPER  AGREEMENTS  TO SEEK TO MAINTAIN  PRINCIPAL  STABILITY IN THE FACE OF
FLUCTUATIONS  IN VALUES DUE TO CHANGES IN YIELDS.  To date,  we have  negotiated
three Wrapper  Agreements,  each of which covers  approximately one third of the
fixed  income  securities  and GAA  strategy  in the  Portfolio  covered by such
Agreements.  Generally  speaking,  Wrapper  Agreements  are issued by  insurance
companies,  banks and other financial institutions.  The Wrapper Agreements held
by the  Portfolio  as of March 31,  2000 are  issued by Bank of  America  NT&SA,
TransAmerica   Life   Insurance   &  Annuity   Co.  and  Caisse  des  Depots  et
Consignations. This was a successful strategy for the Fund.

THE FUND HAS MAINTAINED A HIGH QUALITY PORTFOLIO.  The average credit quality of
investments  in the  Fund  improved  during  the  six  month  period  from AA on
September  30, 1999 to A+ at March 31,  2000,  as measured by Standard & Poor's.
The average quality of the issuers of the Wrapper  Agreements also improved from
AA to AA+ over the  semi-annual  period,  as measured by Standard & Poor's.  The
Fund's duration at March 31, 2000 stood at 3.57 years.

MANAGER OUTLOOK
We believe that unless the laws of supply and demand are repealed, the growth of
U.S. demand must eventually stop  outstripping  the growth of what the economy's
available  workers can supply.  Even with fantastic gains in  productivity,  the
U.S. economy's supply side has been unable to keep up with the breakneck pace of
domestic demand,  so it has to stretch its labor resources even further and rely
increasingly on foreign production.  Obviously, this can not go on forever. What
is less clear, however, is what will drive the inevitable  realignment of supply
and demand, whether it will proceed smoothly,  what the consequences will be for
the financial  markets,  and how those consequences will feed back into the real
economy.

We suspect that a combination  of higher  interest  rates and less frothy equity
markets  will be necessary to realign  domestic  demand with supply.  The recent
rise in energy prices,  if sustained,  might also help restrain  demand a bit by
cutting into domestic  purchasing  power.  It is hard to say exactly how much of
each will be required, and there are many permutations that could potentially do
the trick. One scenario that makes sense to us is another 0.50% of rate hikes by
the Federal  Reserve Board,  relatively  flat equity markets for the rest of the
year, and the  persistence of the recent spike in energy prices at least through
the summer.  This combination should be enough to slow domestic demand growth by
late 2000/2001 to a rate at, or slightly below, the economy's supply  potential.
In our view,  this "soft landing"  would ease pressures on productive  resources
and prevent incipient inflation pressures from becoming too deeply entrenched.

Given this outlook,  we believe the first quarter of 2000 fixed income rally may
slow.  We  anticipate  that fixed income yields may drift a bit higher and yield
spreads may widen over the near term.  These  conditions  should present us with
attractive,  but  limited,  opportunities  to  invest  new cash  flows at higher
yields.  Over the longer  term,  we maintain a generally  positive  but cautious
outlook for the U.S. fixed income markets.

We  maintain  our  long-term  perspective  for  the  Fund,  monitoring  economic
conditions  and how they affect the financial  markets,  as we seek to provide a
high level of current income while seeking to maintain a stable value per share.
Our strategy is to continue to focus on  selecting  the highest  quality  spread
sector assets at the maximum yield  possible,  while normally  maintaining a 10%
cash  allocation to provide  liquidity.  This  liquidity  facilitates  effective
wrapper agreement  management while seeking to maximize the return volatility of
the fixed income  securities.  Additionally,  we expect the GAA overlay to boost
returns, as world economic momentum continues to build.

We value your  support of the  PreservationPlus  Income Fund and look forward to
serving your investment needs in the years ahead.

          /s/SIGNATURES Eric Kirsch, John Axtell and Louis R. D'Arienzo

                 Eric Kirsch, John Axtell and Louis R. D'Arienzo
                            Portfolio Managers of the
                        PRESERVATIONPLUS INCOME PORTFOLIO
                                 March 31, 2000

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                                        5

                                     <PAGE>

PreservationPlus Income
--------------------------------------------------------------------------------
PERFORMANCE COMPARISON

PRESERVATIONPLUS INCOME

GROWTH OF A $10,000  INVESTMENT  (SINCE DECEMBER 23, 1998(1))
[line graph omitted]
plot points as follows:

          PreservationPlus    Lehman 1-3 Year   IBC First Tier   Wrapped Lehman
             Income Fund   Government/Corporate  Retail Money    Intermediate
                                  Index        Market Universe  Aggregate Index
Dec-98           10000            10000            10000            10000
Mar-99           10137            10071            10107            10146
Sep-99           10446            10252            10330            10415
Mar-00           10780            10446            10574            10708


        Average Annual Total Return for Periods through March 31, 2000(2)
                     (excluding 3% maximum redemption fee)
                 One Year 6.34%                     Since 12/23/981 6.09%
--------------------------------------------------------------------------------
(1) The Fund's inception date.
(2) Unaudited.

PAST PERFORMANCE IS NOT INDICATIVE OF FUTURE PERFORMANCE.  Investment return and
principal value will fluctuate so that shares, when redeemed,  may be worth more
or less than their original cost. Performance figures assume the reinvestment of
dividends and capital gains distributions.  Performance figures also include the
effect of any income  received by the Fund if  redemption  fees are paid by fund
shareholders,  however,  they do not reflect a deduction  for a  redemption  fee
assessed at the end of the periods shown.  Benchmark  returns are for the period
beginning September 30, 1998.

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                                        6

                                     <PAGE>

PreservationPlus Income
--------------------------------------------------------------------------------
STATEMENT OF ASSETS AND LIABILITIES (Unaudited)
                                                                 AS OF
                                                                 MARCH 31, 2000
ASSETS
   Investment in PreservationPlus Income Portfolio, at Value ......    $371,954
   Due from Bankers Trust .........................................       5,227
                                                                       --------
Total Assets ......................................................     377,181
                                                                       --------
LIABILITIES
   Dividend Payable ...............................................         196
   Accrued Expenses and Other .....................................      78,933
                                                                       --------
Total Liabilities .................................................      79,129
                                                                       --------
NET ASSETS ........................................................    $298,052
                                                                       ========
COMPOSITION OF NET ASSETS
   Paid-in Capital ................................................    $298,052
   Accumulated Net Realized Gain from Investment,
     Foreign Futures, Foreign Currency and Forward
     Foreign Currency Transactions ................................         570
   Net Unrealized Depreciation on Investment,
     Foreign Futures, Foreign Currency and Forward
     Foreign Currency Contracts ...................................      (1,323)
   Unrealized Appreciation on Wrapper Agreements ..................         753
                                                                       --------
NET ASSETS ........................................................    $298,052
                                                                       ========
SHARES OUTSTANDING ($0.001 par value per share,
   unlimited number of shares of beneficial
   interest authorized) ...........................................      29,805
                                                                       ========
NET ASSET VALUE, OFFERING AND REDEMPTION PRICE PER SHARE
   (net assets divided by shares outstanding) .....................    $  10.00
                                                                       ========

--------------------------------------------------------------------------------
                       See Notes to Financial Statements.
                                        7

                                     <PAGE>

PreservationPlus Income
--------------------------------------------------------------------------------
STATEMENT OF OPERATIONS (Unaudited)

                                                                  FOR THE SIX
                                                                  MONTHS ENDED
                                                                 MARCH 31, 2000
INVESTMENT INCOME
   Income allocated from PreservationPlus
     Income Portfolio, net ....................................    $  3,800
                                                                   --------
EXPENSES
   Printing and Shareholder Reports ...........................      19,535
   Professional Fees ..........................................       8,268
   Trustees Fees ..............................................       1,967
   Administration and Services Fees ...........................         190
   Miscellaneous ..............................................       1,426
                                                                   --------
Total Expenses ................................................      31,386
Less: Fee Waivers or Expense Reimbursements ...................     (31,039)
                                                                   --------
Net Expenses ..................................................         347
                                                                   --------
NET INVESTMENT INCOME .........................................       3,453
                                                                   --------
REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENT,
   FOREIGN CURRENCIES, FORWARD FOREIGN CURRENCY,
   FOREIGN AND DOMESTIC FUTURES AND WRAPPER AGREEMENTS
   Net Realized Gain (Loss) from:
     Investment Transactions ..................................          --
     Foreign Currency Transactions ............................         103
     Forward Foreign Currency Transactions ....................         (88)
     Foreign and Domestic Futures Transactions ................         725
   Net Change in Unrealized Appreciation/Depreciation
     on Investment, Foreign Currency, Forward Foreign
     Currency and Foreign and Domestic Futures Contracts ......      (1,676)
   Net Change in Unrealized Appreciation on
     Wrapper Agreements .......................................         936
                                                                   --------
NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENT,
   FOREIGN CURRENCIES, FORWARD FOREIGN CURRENCY, FOREIGN
   AND DOMESTIC FUTURES AND WRAPPER AGREEMENTS ................         --
                                                                   --------
NET INCREASE IN NET ASSETS FROM OPERATIONS ....................    $  3,453
                                                                   ========

                       See Notes to Financial Statements.
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                                        8

                                     <PAGE>

PreservationPlus Income
--------------------------------------------------------------------------------
STATEMENTS OF CHANGES IN NET ASSETS
                                                                 FOR THE PERIOD
                                                                   DECEMBER 23,
                                                   FOR THE SIX   1998(1) THROUGH
                                                  MONTHS ENDED     SEPTEMBER 30,
                                                MARCH 31, 2000(2)       1999
INCREASE IN NET ASSETS:
OPERATIONS
   Net Investment Income ..........................   $  3,453         $  2,824
   Net Realized Gain (Loss) from Investment,
     Foreign Currencies, Forward Foreign
     Currency and Foreign and Domestic
     Futures Transactions .........................        740             (170)
   Net Change in Unrealized Appreciation/
     Depreciation on Investment, Foreign
     Currencies, Forward Foreign Currency
     Contracts and Foreign and Domestic Futures ...     (1,676)             353
   Net Change in Unrealized Appreciation/
     Depreciation on Wrapper Agreements ...........        936             (183)
                                                      --------         --------
   Net Increase in Net Assets Resulting
     from Operations ..............................      3,453            2,824
                                                      --------         --------
DISTRIBUTIONS TO SHAREHOLDERS
   Net Investment Income ..........................     (3,453)          (2,824)
                                                      --------         --------
CAPITAL TRANSACTIONS IN SHARES OF BENEFICIAL INTEREST
   Proceeds from Sales of Shares ..................    200,892          447,190
   Dividend Reinvestments .........................      4,048            1,781
   Cost of Shares Sold ............................    (24,477)        (331,382)
                                                      --------         --------
Net Increase in Net Assets from Capital
   Transactions in Shares of Beneficial Interest ..    180,463          117,589
                                                      --------         --------
TOTAL INCREASE IN NET ASSETS ......................    180,463          117,589
NET ASSETS
   Beginning of Period ............................    117,589               --
                                                      --------         --------
   End of Period ..................................   $298,052         $117,589
                                                      ========         ========


--------------------------------------------------------------------------------
1 Commencement of operations.
2 Unaudited.

                       See Notes to Financial Statements.
--------------------------------------------------------------------------------
                                        9

                                     <PAGE>

PreservationPlus Income
--------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS

Contained  below are selected  data for a share  outstanding,  total  investment
return, ratios to average net assets and other supplemental data for the periods
indicated for PreservationPlus Income.
                                                                 FOR THE PERIOD
                                                                  DECEMBER 23,
                                                 FOR THE SIX     1998(1) THROUGH
                                                MONTHS ENDED      SEPTEMBER 30,
                                               MARCH 31, 2000(4)      1999
PER SHARE OPERATING PERFORMANCE:
NET ASSET VALUE, BEGINNING OF PERIOD                 $10.00           $10.00
                                                     ------           ------
INCOME FROM INVESTMENT OPERATIONS
   Net Investment Income                               0.32             0.44
DISTRIBUTIONS TO SHAREHOLDERS
   Net Investment Income                              (0.32)           (0.44)
                                                     ----             ------
NET ASSET VALUE, END OF PERIOD                       $10.00           $10.00
                                                     ======           ======
TOTAL INVESTMENT RETURN                                3.20%            4.46%(2)

SUPPLEMENTAL DATA AND RATIOS:
Net Assets, End of Period (000s omitted)             $  298             $118
Ratios to Average Net Assets:
   Net Investment Income                               6.30%(3)         5.85%(3)
   Expenses After Waivers, Including Expenses
     of the PreservationPlus Income Portfolio          1.00%(3)         0.89%(3)
   Expenses Before Waivers, Including Expenses
     of the PreservationPlus Income Portfolio         57.35%(3)       228.89%(3)

--------------------------------------------------------------------------------
(1) Commencement of operations.
(2) Return is not annualized.
(3) Annualized.
(4) Unaudited.

                       See Notes to Financial Statements.
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                                       10

<PAGE>

PreservationPlus Income
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (Unaudited)

NOTE 1--ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES
A. ORGANIZATION
BT Investment Funds (the "Trust") is registered under the Investment Company Act
of 1940 (the "Act"), as amended, as an open-end  management  investment company.
The Trust was organized on July 21, 1986, as a business  trust under the laws of
the Commonwealth of Massachusetts.  PreservationPlus  Income (the "Fund") is one
of the funds  offered to investors by the Trust.  The Fund began  operations  on
December  23,  1998.  The Fund  seeks to achieve  its  investment  objective  by
investing  substantially  all  of its  assets  in  the  PreservationPlus  Income
Portfolio (the "Portfolio").  The Portfolio,  a series of investment portfolios,
is an open-end management investment company registered under the Act. The value
of the Fund's  investment  in the  Portfolio  reflects the Fund's  proportionate
interest  in the net  assets of the  Portfolio.  At March 31,  2000,  the Fund's
investment was approximately 0.002% of the Portfolio.

The financial statements of the Portfolio,  including a list of assets held, are
contained  elsewhere in this report and should be read in  conjunction  with the
Fund's financial statements.

B. SECURITY TRANSACTIONS AND RELATED INVESTMENT INCOME
The  Fund  earns  income,  net  of  expenses,  daily  on its  investment  in the
Portfolio.  All of the net  investment  income and net realized  and  unrealized
gains and losses (including  Wrapper  Agreements) of the Portfolio are allocated
pro rata among the investors in the Portfolio on a daily basis.

Security  transactions  are accounted for on a trade date basis.  Realized gains
and losses on investments sold are computed on the basis of identified cost. The
realized  and  unrealized  gains  and  losses  in the  Statement  of  Operations
represent the Fund's pro rata interest in the realized and unrealized  gains and
losses of the Portfolio including the offsetting valuation charge of the Wrapper
Agreements.

C. DISTRIBUTIONS
It is the Fund's  policy to declare  dividends  daily and  distribute  dividends
monthly  to  shareholders  from net  investment  income.  Dividends  payable  to
shareholders are recorded by the Fund on the ex-dividend date.  Distributions of
net realized  short-term and long-term capital gains, if any, earned by the Fund
are made annually to the extent they exceed capital loss carry forwards.

D. FEDERAL INCOME TAXES
It is the Fund's policy to comply with the  requirements of the Internal Revenue
Code applicable to regulated investment  companies and distribute  substantially
all of its taxable  income to  shareholders.  Therefore,  no federal  income tax
provision is required.  The Fund may periodically make  reclassifications  among
certain  of  its  capital  accounts  as a  result  of  the  differences  in  the
characterization   and   allocation   of  certain   income  and  capital   gains
distributions  determined  annually in accordance  with federal tax  regulations
which may differ from generally accepted accounting principles.

E. OTHER
The Trust  accounts  separately for the assets,  liabilities,  and operations of
each of its funds.  Expenses directly attributable to a fund are charged to that
fund, while expenses which are attributable to the Trust are allocated among the
funds in the Trust.

The preparation of financial statements in conformity with accounting principles
generally  accepted in the United States  requires  management to make estimates
and assumptions  that affect the reported  amounts in the financial  statements.
Actual results could differ from those estimates.

NOTE 2--FEES AND TRANSACTIONS WITH AFFILIATES
The Fund has entered into an Administration  and Services Agreement with Bankers
Trust Company ("Bankers Trust"), an indirect wholly owned subsidiary of Deutsche
Bank A.G. Under this agreement, Bankers Trust provides administrative,  custody,
transfer  agency  and  shareholder  services  to the  Fund in  return  for a fee
computed  daily and paid monthly at an annual rate of .35% of average  daily net
assets.

Bankers  Trust has  contractually  agreed to waive its fees through  January 31,
2010  and  reimburse  expenses  of the  Fund and the  Portfolio,  to the  extent
necessary, to limit all expenses to 1.50%. Furthermore, Bankers Trust has

--------------------------------------------------------------------------------
                                       11

                                     <PAGE>

PreservationPlus Income
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (Unaudited)

agreed to waive its fees voluntarily and reimburse  expenses of the Fund, to the
extent necessary,  to limit all expenses to .65% of the average daily net assets
of the Fund,  excluding expenses of the Portfolio and 1.00% of the average daily
net assets of the Fund,  including expenses of the Portfolio.  Bankers Trust may
terminate these voluntary  waivers and  reimbursements at anytime without notice
to the shareholders.

The Fund is also subject to shareholder  servicing fees in the maximum amount of
 .25% of average daily net assets.

Shareholder  transaction expenses are charges paid when investors buy, redeem or
exchange  shares.  Under normal  circumstances,  redemptions  of shares that are
qualified  are not  subject  to a  redemption  fee.  Redemptions  of  shares  or
redemptions  from 401(k) plans or IRA's that are not  qualified are subject to a
3% fee if the interest rate trigger is active.

ICC Distributors, Inc. provides distribution services to the Fund.

NOTE 3--SHARES OF BENEFICIAL INTEREST
At March 31,  2000,  there  were an  unlimited  number  of shares of  beneficial
interest  authorized.  Transactions in shares of beneficial interest for the six
months ended March 31, 2000 were as follows:

                                FOR THE SIX MONTHS
                               ENDED MARCH 31, 2000(2)
                           ----------------------------
                               SHARES        AMOUNT
                               -------      --------
Sold                            20,089      $200,892
Reinvested                         404         4,048
Redeemed                        (2,447)     ((24,477)
                               -------      --------
Net Increase                    18,046      $180,463
                               =======      ========

                                  FOR THE PERIOD
                                DECEMBER 23, 1998(1)
                               TO SEPTEMBER 30, 1999
                            ---------------------------
                               SHARES        AMOUNT
                               -------     ---------
Sold                            44,719     $ 447,190
Reinvested                         178         1,781
Redeemed                       (33,138)     (331,382)
                               -------     ---------
Net Increase                    11,759     $ 117,589
                               =======     =========


--------------------------------------------------------------------------------
(1) Commencement of operations.
(2) Unaudited.

NOTE 4--FUND NAME CHANGE
On January 31, 2000, the Fund changed its name from BT  PreservationPlus  Income
Fund to PreservationPlus Income.

--------------------------------------------------------------------------------
                                       12

                                     <PAGE>

PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
SCHEDULE OF PORTFOLIO INVESTMENTS March 31, 2000 (Unaudited)

  PRINCIPAL
   AMOUNT            DESCRIPTION                                 VALUE

ASSET-BACKED SECURITIES - 11.2%
 $2,000,000 California Infrastructure PG&E,
            6.42%, 9/25/08 ..............................   $ 1,928,210
 3,000,000 Chase Funding Mortgage Loan,
            7.674%, 10/25/19 ............................     3,000,000
 1,191,715 First Union National Bank Commercial
            Mortgage, 7.184%, 9/15/08 ...................     1,177,718
   927,643 GE Capital Mortgage Services, Inc.,
            6.00%, 7/25/29 ..............................       869,280
 3,003,408 Lb Comm Conduit Mortgage Trust,
            6.41%, 8/15/07 ..............................     2,882,038
 1,015,000 Norwest Asset Securities Corp.,
            6.75%, 8/25/29 ..............................       975,867
 2,500,000 Providian Master Trust, 7.49%, 8/17/09 .......     2,534,313
   937,460 Residential Funding Mortgage I
            Securities, 6.75%, 4/25/29 ..................       888,183
   150,000 Vendee Mortgage Trust,
            7.50%, 8/15/17 ..............................       150,353
                                                            -----------
TOTAL ASSET-BACKED SECURITIES
   (Cost $14,445,444) ...................................    14,405,962
                                                            -----------
           CORPORATE DEBT - 34.1%
           FINANCIAL SERVICES - 18.3%
 1,000,000 Abbey National PLC, 6.69%, 10/17/05 ..........       952,626
 1,000,000 ABN Amro Bank, NV, 7.25%, 5/31/05 ............       984,814
 1,000,000 Allstate Corp., 7.20%, 12/1/09 ...............       955,780
 1,440,000 American General Finance,
            5.875%, 12/15/05 ............................     1,325,052
 1,500,000 Associates Corp., 8.55%, 7/15/09 .............     1,585,889
 1,000,000 Bank of Tokyo - Mitsubishi,
            8.40%, 4/15/10 ..............................     1,014,602
 1,000,000 BankBoston, 6.50%, 12/19/07 ..................       919,548
 1,000,000 Bear Stearns Co., Inc., 7.625%, 2/1/05 .......       994,840
   114,545 Bear Stearns Commercial Mortgage
            Securities, 7.64%, 2/15/09 ..................       115,600
 1,000,000 CIT Group, Inc., 7.125%, 10/15/04 ............       986,303
 1,000,000 CNA Financial, 6.45%, 1/15/08 ................       891,638
 1,000,000 Everest Reins Holding, Co.,
            8.75%, 3/15/10 ..............................     1,044,000
   360,887 First Union, Lehman Brothers Bank of
            America, 6.28%, 6/18/07 .....................       346,307
 2,000,000 Ford Motor Credit Co.,
            7.375%, 10/28/09 ............................     1,956,400
 2,000,000 General Motors Acceptance Corp.,
            7.75%, 1/19/10 ..............................     2,001,480
 1,000,000 Household Finance Corp.,
            6.50%, 11/15/08 .............................       920,601
 1,000,000 J.P. Morgan & Co., Inc., 6.00%, 1/15/09 ......       889,987
   950,000 Lehman Brothers Holdings,
            6.625%, 12/27/02 ............................       923,842
1,600,000 Morgan Stanley Dean Witter,
            7.00%, 10/1/13 ..............................     1,509,438
 1,000,000 Paine Webber Group, Inc.,
            6.375%, 5/15/04 .............................       947,548
 1,500,000 Santander Finance Issuance,
            6.80%, 7/15/05 ..............................     1,436,955
 1,000,000 Westdeutsche Landesbank NY,
            6.05%, 1/15/09 ..............................       899,500
                                                            -----------
                                                             23,602,750
                                                            -----------
           INDUSTRIAL - 4.9%
 1,000,000 Delphi Auto Systems Corp.,
            6.50%, 5/1/09 ...............................       899,548
 1,000,000 Laidlaw, Inc., 7.70%, 8/15/02 ................       550,000
 1,000,000 News America Holdings,
            8.50%, 2/15/05 ..............................     1,027,489
 1,000,000 Northrop-Grumman Corp.,
            7.00%, 3/1/06 ...............................       940,519
 1,000,000 Time Warner, Inc., 7.48%, 1/15/08 ............       982,111
 1,000,000 TYCO International Group,
            5.875%, 11/1/04 .............................       932,500
 1,000,000 Union Pacific Corp., 7.25%, 11/1/08 ..........       956,029
                                                            -----------
                                                              6,288,196
                                                            -----------
           UTILITIES - 2.5%
 1,000,000 Dynegy Holdings, Inc.,
            8.125%, 3/15/05 .............................     1,017,800
 1,000,000 MCI Worldcom, Inc., 6.95%, 8/15/06 ...........       974,541
 1,250,000 Tosco Corp., 7.625%, 5/15/06 .................     1,227,983
                                                            -----------
                                                              3,220,324
                                                            -----------
           OTHER - 8.4%
 1,000,000 Cox Communication, Inc.,
            7.50%, 8/15/04 ..............................       992,349
 1,000,000 Delta Airlines, 7.90%, 12/15/09 ..............       955,756
 1,000,000 Duke Capital Corp., 7.50%, 10/1/09 ...........       982,168
 1,000,000 Federated Dept Stores, 6.90%, 4/1/29 .........       858,986
 1,000,000 Goodyear Tire & Rubber,
            8.50%, 3/15/07 ..............................     1,012,536
 1,000,000 Kroger Co., 7.45%, 3/1/08 ....................       975,000
 1,137,000 Lockheed Martin Corp.,
            7.25%, 5/15/06 ..............................     1,089,587
 1,000,000 Marriot International, 6.875%, 11/15/05 ......       949,800
 1,000,000 Sears Roebuck Acceptance,
            6.00%, 3/20/03 ..............................       958,157
 1,000,000 TRW, Inc., 6.50%, 6/1/02 .....................       969,990
 1,000,000 Vodafone Airtouch PLC,
            7.75%, 2/15/10 ..............................     1,007,911
                                                            -----------
                                                             10,752,240
                                                            -----------
TOTAL CORPORATE DEBT
   (Cost $44,438,869) ...................................    43,863,510
                                                            -----------


                       See Notes to Financial Statements.
--------------------------------------------------------------------------------
                                       13

           <PAGE>

PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
SCHEDULE OF PORTFOLIO INVESTMENTS March 31, 2000 (Unaudited)

  PRINCIPAL
   AMOUNT        DESCRIPTION                                  VALUE

           FOREIGN DEBT - 1.5%
 $1,000,000 Celulosa Arauco y Constitu,
            6.75%, 12/15/03 .............................    $  944,785
 1,000,000 Corp Andina de Fomento,
            7.75%, 3/1/04 ...............................       990,982
                                                            -----------
TOTAL FOREIGN DEBT
   (Cost $1,945,114) ....................................     1,935,767
                                                            -----------
           MORTGAGE BACKED SECURITIES - 29.5%
           FGLMC GOLD,
 4,858,143   7.50%, 10/1/24 .............................     4,803,539
 1,028,460   8.00%, 3/1/27 ..............................     1,033,452
           FHLMC,
 4,000,000   6.25%, 7/15/04 .............................     3,875,836
           FNCL,
 4,278,187   8.00%, 5/1/25 ..............................     4,300,357
 2,380,274   8.00%, 9/1/26 ..............................     2,390,562
 2,116,089   7.50%, 7/1/27 ..............................     2,080,289
 5,854,478   7.50%, 9/1/27 ..............................     5,755,432
 5,838,923   8.00%, 9/1/27 ..............................     5,869,225
 1,022,722   6.50%, 9/1/28 ..............................       960,198
 1,066,060   6.50%, 10/1/28 .............................     1,000,887
   957,553   6.50%, 12/1/28 .............................       899,014
           FNMA,
 4,980,612   7.369%, 1/17/13 ............................     5,039,817
                                                            -----------
TOTAL MORTGAGE BACKED SECURITIES
   (Cost $38,270,956) ...................................    38,008,608
                                                            -----------
           U.S. TREASURY SECURITY - 0.3%
   440,000 U.S. Treasury Note, 5.25%, 5/15/04 ...........       422,400
                                                            -----------
TOTAL U.S. TREASURY SECURITY
   (Cost $430,586) ......................................       422,400
                                                            -----------
  PRINCIPAL
   AMOUNT/
   SHARES            DESCRIPTION                                VALUE

          SHORT-TERM INSTRUMENTS - 37.3%
          MUTUAL FUND - 36.4%
46,856,778 Institutional Cash Management ................  $ 46,856,778
                                                           ------------
          U.S. TREASURY BILLS - 0.9%
          U.S. Treasury Bills,
 $275,000   5.04%, 4/6/00 ...............................       274,880
  910,000   5.36%, 4/6/00 ...............................       909,604
                                                           ------------
                                                              1,184,484
                                                           ------------
TOTAL SHORT-TERM INSTRUMENTS
   (Cost $48,041,276) ...................................    48,041,262
                                                           ------------
TOTAL INVESTMENTS
   (Cost $147,572,245) .........................    113.9% $146,677,509
                                                           ------------
          WRAPPER AGREEMENTS* - 0.4%
 Bank of America NT&SA ..................................       182,782
 Caisse des Depots et Consignations .....................       182,716
 TransAmerica LifeInsurance &AnnuityCo. .................       182,767
                                                           ------------
TOTAL WRAPPER AGREEMENTS ................................       548,265
                                                           ------------
LIABILITIES IN EXCESS OF OTHER ASSETS ..........    (14.3)  (18,461,863)
                                                    -----  ------------
NET ASSETS .....................................    100.0% $128,763,911
                                                    =====  ============

--------------------------------------------------------------------------------
The following abbreviations are used in portfolio descriptions:
FGLMC   --  Federal Government Loan Mortgage Company
FHLMC   --  Federal Home Loan Mortgage Corp.
FNMA    --  Federal National Mortgage Association
FNCL    --  Federal National Mortgage Association Class Loan
*Wrapper Agreements - Each Wrapper Agreements  obligates the wrapper provider to
maintain the book value of a portion of the Portfolio's assets up to a specified
maximum dollar amount, upon the occurrence of certain specified events.

                       See Notes to Financial Statements.
--------------------------------------------------------------------------------
                                       14

                                     <PAGE>

PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
STATEMENT OF ASSETS AND LIABILITIES (Unaudited)

                                                                 AS OF
                                                                 MARCH 31, 2000
ASSETS
   Investment at Value (Cost of $147,572,245) ................   $146,677,509
   Interest Receivable .......................................      1,384,625
   Prepaid Expenses and Other ................................         69,121
   Wrapper Agreements ........................................        548,265
   Due from Bankers Trust ....................................         22,679
   Variation Margin Receivable ...............................        518,726
                                                                 ------------
Total Assets .................................................    149,220,925
                                                                 ------------
LIABILITIES
   Payable for Securities Purchased ..........................     20,453,125
   Accrued Expenses and Other ................................          3,889
                                                                 ------------
Total Liabilities ............................................     20,457,014
                                                                 ------------
NET ASSETS ...................................................   $128,763,911
                                                                 ============
COMPOSITION OF NET ASSETS
   Paid in Capital ...........................................   $129,453,491
   Net Unrealized Appreciation/Depreciation on
     Investments, Foreign Currencies, Forward
     Foreign Currency Contracts, Foreign and
     Domestic Futures and Wrapper Agreements .................       (689,580)
                                                                 ------------
NET ASSETS ...................................................   $128,763,911
                                                                 ============

                       See Notes to Financial Statements.
--------------------------------------------------------------------------------
                                       15

                                     <PAGE>

PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
STATEMENT OF OPERATIONS (Unaudited)

                                                                   FOR THE SIX
                                                                  MONTHS ENDED
                                                                 MARCH 31, 2000
INVESTMENT INCOME
   Interest Income ..............................................    $1,250,518
   Credited Rate Interest .......................................       134,227
                                                                     ----------
Total Investment Income .........................................     1,384,745
                                                                     ----------
EXPENSES
   Advisory Fees ................................................       129,617
   Wrapper Fees .................................................        37,536
   Professional Fees ............................................        27,288
   Administration and Service Fees ..............................         9,384
   Trustees Fees ................................................         1,630
   Miscellaneous ................................................         8,088
                                                                     ----------
Total Expenses ..................................................       213,543
Less: Fee Waivers or Expense Reimbursements .....................      (147,889)
                                                                     ----------
Net Expenses ....................................................        65,654
                                                                     ----------
NET INVESTMENT INCOME ...........................................     1,319,091
                                                                     ----------
REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS,
   FOREIGN CURRENCIES, FORWARD FOREIGN CURRENCY,
   FOREIGN AND DOMESTIC FUTURES AND
   WRAPPER AGREEMENTS
   Net Realized Gain (Loss) from:
     Investment Transactions ....................................            --
     Foreign Currency Transactions ..............................        20,683
     Forward Foreign Currency Transactions ......................       (18,568)
     Foreign and Domestic Futures Transactions ..................       720,285
   Net Change in Unrealized Appreciation/Depreciation
     on Investments, Foreign Currency, Forward
     Foreign Currency and Foreign Futures Contracts .............      (726,809)
   Net Change in Unrealized Appreciation Wrapper Agreements .....         4,409
                                                                     ----------
NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS,
   FOREIGN CURRENCIES, FORWARD FOREIGN CURRENCY,
 FOREIGN AND DOMESTIC FUTURES AND
   WRAPPER AGREEMENTS ...........................................            --
                                                                     ----------
NET INCREASE IN NET ASSETS FROM OPERATIONS ......................    $1,319,091
                                                                     ==========

                       See Notes to Financial Statements.
--------------------------------------------------------------------------------
                                       16

                                     <PAGE>

PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
STATEMENTS OF CHANGES IN NET ASSETS

                                                                  FOR THE PERIOD
                                                                   DECEMBER 23,
                                                   FOR THE SIX   1998(1) THROUGH
                                                  MONTHS ENDED    SEPTEMBER 30,
                                                 MARCH 31, 2000(2)    1999
INCREASE (DECREASE) IN NET ASSETS FROM:
OPERATIONS
   Net Investment Income ........................  $  1,319,091    $    597,975
   Net Realized Gain (Loss) from Investments,
     Foreign Currencies, Forward Foreign
     Currency and Foreign and
     Domestic Futures Transactions ..............       722,400         (32,820)
   Net Change in Unrealized Appreciation/
     Depreciation on Investments, Foreign
     Currencies, Forward Foreign Currency
     Contracts and Foreign and Domestic Futures..      (726,809)       (329,564)
   Net Unrealized Appreciation/Depreciation
     on Wrapper Agreements ......................         4,409         362,384
                                                   ------------    ------------
Net Increase in Net Assets from Operations ......     1,319,091         597,975
                                                   ------------    ------------
CAPITAL TRANSACTIONS
   Proceeds from Capital Invested ...............   190,674,551      44,761,026
   Value of Capital Withdrawn ...................   (89,324,728)    (19,264,004)
                                                   ------------    ------------
Net Increase in Net Assets from
   Capital Transactions .........................   101,349,823      25,497,022
                                                   ------------    ------------
TOTAL INCREASE IN NET ASSETS ....................   102,668,914      26,094,997
NET ASSETS
   Beginning of Period ..........................    26,094,997              --
                                                   ------------    ------------
   End of Period ................................  $128,763,911    $ 26,094,997
                                                   ============    ============

--------------------------------------------------------------------------------
(1) Commencement of operations.
(2) Unaudited.

                       See Notes to Financial Statements.
--------------------------------------------------------------------------------
                                       17

                                     <PAGE>

PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS

Contained below are selected  supplemental data and ratios to average net assets
for the periods indicated for the PreservationPlus Income Portfolio.

                                                                FOR THE PERIOD
                                              FOR THE SIX        DECEMBER 23,
                                             MONTHS ENDED       1998(1) THROUGH
                                           MARCH 31, 2000(3)  SEPTEMBER 30, 1999
SUPPLEMENTAL DATA AND RATIOS:
Net Assets, End of Period (000s omitted) ...  $128,764            $26,095
Ratios to Average Net Assets:
   Net Investment Income ...................      6.95%(2)           6.47%(2)
   Expenses After Waivers ..................      0.35%(2)           0.49%(2)
   Expenses Before Waivers .................      1.13%(2)           1.41%(2)
Portfolio Turnover Rate ....................      0.00%               149%

--------------------------------------------------------------------------------
(1) Commencement of operations.
(2) Annualized.
(3) Unaudited.

                       See Notes to Financial Statements.
--------------------------------------------------------------------------------
                                       18

                                     <PAGE>

PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (Unaudited)

NOTE 1--ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES
A. ORGANIZATION
The BT Investment  Portfolios  (the "Portfolio  Trust") is registered  under the
Investment  Company  Act  of  1940  (the  "Act"),  as  amended,  as an  open-end
management investment company. The Portfolio, one of the series of the Portfolio
Trust,  was organized and began  operations on December 23, 1998.  The Portfolio
Trust was organized as an  unincorporated  trust under the laws of New York. The
Declaration  of Trust  permits the Board of Trustees (the  "Trustees")  to issue
beneficial interests in the Portfolio.

B. SECURITY VALUATION
Debt securities  (other than short-term debt obligations  maturing in 60 days or
less), including listed securities and securities for which price quotations are
available,  will normally be valued on the basis of market valuations  furnished
by a pricing service. Such market valuations may represent the last quoted price
on the  securities'  major trading  exchange or quotes  received from dealers or
market makers in the relevant securities or may be determined through the use of
matrix  pricing.  In matrix  pricing,  pricing  services may use various pricing
models,  involving  comparable  securities,  historic  relative price movements,
economic factors and dealer quotations. Over-the-counter securities are normally
valued at the bid price. Short-term debt obligations and money market securities
maturing in 60 days or less are valued at amortized  cost.  Securities for which
market  quotations are not readily available are valued by Bankers Trust Company
pursuant to procedures adopted by the Portfolio's Board of Trustees.

Wrapper  Agreements  generally will be equal to the difference  between the Book
Value and Market Value (plus the crediting  rate  adjustment)  on the applicable
covered  assets and will either be  reflected  as an asset or a liability of the
Portfolio.  The  Portfolio's  Board of Trustees,  in  performing  its fair value
determination   of   the   Portfolio's   Wrapper   Agreements,   considers   the
creditworthiness  and the ability of Wrapper  Providers to pay amounts due under
the Wrapper Agreements.

C. SECURITY TRANSACTIONS AND INTEREST INCOME
Security  transactions are accounted for on a trade date basis.  Interest income
is  recorded  on the  accrual  basis and  includes  amortization  of premium and
accretion of discount on  investments.  Realized  gains and losses from security
transactions  are  recorded on the  identified  cost basis.  The  credited  rate
interest  represents  the actual  interest  earned on covered  assets  under the
Portfolio's  Wrapper  Agreements (the  "agreements") plus or minus an adjustment
for an amount  receivable  from or  payable  to the  wrapper  provider  based on
fluctuations in the market value of covered assets under the agreements.

All of the net  investment  income and net  realized  and  unrealized  gains and
losses  (including  the Wrapper  Agreements)  of the Portfolio are allocated pro
rata to the investors in the Portfolio on a daily basis.

D. TBA PURCHASE COMMITMENTS
The  Portfolio may enter into "TBA" (to be  announced)  commitments  to purchase
securities for a fixed price at a future date,  typically not exceeding 45 days.
TBA purchase commitments may be considered securities in themselves, and involve
a risk of loss if the value of the  security to be purchased  declines  prior to
settlement date. This risk is in addition to the risk of decline in the value of
the Portfolio's other assets.  Unsettled TBA purchase  commitments are valued at
the  current  market  value  of  the  underlying  securities,  according  to the
procedures described under "Security Valuation" above.

E. FOREIGN CURRENCY TRANSACTIONS
The books and records of the  Portfolio  are  maintained  in U.S.  dollars.  All
assets and liabilities  initially  expressed in foreign currencies are converted
into  U.S.  dollars  at  prevailing  exchange  rates.  Purchases  and  sales  of
investment  securities,  dividend and interest income,  and certain expenses are
translated at the rates of exchange  prevailing on the respective  dates of such
transactions.

F. FORWARD FOREIGN CURRENCY CONTRACTS
The Portfolio may enter into forward foreign currency  contracts for the purpose
of settling specific  purchases or sales of securities  denominated in a foreign
currency or with respect to the  Portfolio's  investments.  The net U.S.  dollar
value of foreign  currency  underlying all contractual  commitments  held by the
Portfolio  and  the  resulting  unrealized   appreciation  or  depreciation  are
determined  using  prevailing  exchange  rates.  With respect to forward foreign
currency  contracts,  losses in excess of amounts recognized in the Statement of
Operations  may arise due to changes in the value of the foreign  currency or if
the counterparty does not perform under the contract.

--------------------------------------------------------------------------------
                                       19

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PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (Unaudited)

G. OPTION CONTRACTS
The Portfolio may enter into option contracts. Upon the purchase of a put option
or a call option by the Portfolio, the premium paid is recorded as an investment
and marked-to-market daily to reflect the current market value. When a purchased
option  expires,  the Portfolio will realize a loss in the amount of the cost of
the option.  When the  Portfolio  enters into a closing  sale  transaction,  the
Portfolio  will realize a gain or loss  depending  on whether the sale  proceeds
from the  closing  sale  transaction  are  greater  or less than the cost of the
option.  When the Portfolio  exercises a put option,  it realizes a gain or loss
from the sale of the underlying security and the proceeds from such sale will be
decreased by the premium  originally  paid. When the Portfolio  exercises a call
option,  the cost of the security  which the Portfolio  purchases  upon exercise
will be increased by the premium originally paid.

H. FUTURES CONTRACTS
The Portfolio may enter into financial futures contracts, which are contracts to
buy a standard quantity of securities at a specified price on a future date. The
Portfolio  is  required  to  make  initial  margin  deposits  either  in cash or
securities in an amount equal to a certain  percentage  of the contract  amount.
Variation  margin  payments  are made or  received  by the  Portfolio  each day,
depending on the daily fluctuations in the value of the underlying security, and
are recorded for financial  statement  purposes as unrealized gains or losses by
the Portfolio.

Futures  contracts  involve  certain risks.  These risks could include a lack of
correlation  between  the  futures  contract  and the  corresponding  securities
market,  a potential  lack of liquidity in the  secondary  market and  incorrect
assessments of market trends which may result in poorer overall performance than
if a futures contract had not been entered into.

Futures contracts are valued at the settlement price established each day by the
board of trade or exchange on which they are traded.

I. FEDERAL INCOME TAXES
The  Portfolio is  considered a  partnership  under the Internal  Revenue  Code.
Therefore, no federal income tax provision is necessary.

J. OTHER
The preparation of financial  statements in conformity  with generally  accepted
accounting principles requires management to make estimates and assumptions that
affect the reported  amounts in the financial  statements.  Actual results could
differ from those estimates.

NOTE 2--FEES AND TRANSACTIONS WITH AFFILIATES
The Portfolio has entered into an  Administration  and Services  Agreement  with
Bankers Trust Company ("Bankers Trust"),  an indirect wholly owned subsidiary of
Deutsche Bank A.G. Under this agreement,  Bankers Trust provides administrative,
custody, transfer agency and shareholder services to the Portfolio in return for
a fee  computed  daily  and  paid  monthly  at an  annual  rate  of  .05% of the
Portfolio's average daily net assets.

The Portfolio has entered into an Advisory  Agreement with Bankers Trust.  Under
this  agreement,  the Portfolio pays Bankers Trust a fee computed daily and paid
monthly at an annual rate of .70% of the  Portfolio's  average daily net assets,
less  advisor  fees  paid  for the pro  rata  amount  due to  investment  in the
Institutional Cash Management Fund.

Bankers  Trust has  contractually  agreed to waive its fees through  January 31,
2010 and reimburse expenses of the Portfolio,  to the extent necessary, to limit
all expenses to .35% of the average daily net assets of the Portfolio.

The Portfolio may invest in the  Institutional  Cash  Management Fund (the "Cash
Management Fund"), an open-end management  investment company managed by Bankers
Trust Company.  The Cash Management Fund is offered as a cash management  option
to the Portfolio and other accounts managed by Bankers Trust. Distributions from
the Cash  Management  Fund to the  Portfolio  for the six months ended March 31,
2000 amounted to $290,703, and are included in dividend income.

At March 31,  2000,  the  Portfolio  was a  participant  with  other  affiliated
entities in a revolving  credit  facility in the amount of  $150,000,000,  which
expires  April 29,  2000. A  commitment  fee on the average  daily amount of the
available  commitment is payable on a quarterly basis and apportioned  among all
participants, based on net assets. No amounts were drawn down or outstanding for
this  Portfolio  under the credit  facility  for the six months  ended March 31,
2000. Subsequent to March 31, 2000,

--------------------------------------------------------------------------------
                                       20

                                     <PAGE>

PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (Unaudited)

the revolving credit facility was renewed and increased to  $200,000,000,  which
expires April 27, 2001.

NOTE 3--PURCHASES AND SALES OF INVESTMENT SECURITIES
The aggregate  cost of purchases and proceeds from sales of  investments,  other
than  short-term  obligations,  for the six months  ended March 31,  2000,  were
$78,269,296 and $0, respectively.

For federal income tax purposes,  the tax basis of investments held at March 31,
2000,  was  $147,572,245.   The  aggregate  gross  unrealized  appreciation  was
$298,265,  and the aggregate gross  unrealized  depreciation for all investments
was $1,193,001 as of March 31, 2000.

NOTE 4--WRAPPER AGREEMENTS
The Portfolio will enter into Wrapper Agreements with insurance companies, banks
or other financial  institutions  ("Wrapper  Providers")  that are rated, at the
time of purchase,  in one of the top two long-term rating  categories by Moody's
or S&P. A wrapper  agreement  is a  derivative  instrument  that is  designed to
protect the portfolio from investment losses and under most circumstances permit
the Fund to maintain a constant NAV per share. There is no active trading market
for Wrapper  Agreements,  and none is expected to develop;  therefore,  they are
considered illiquid.

A default by the issuer of a  Portfolio  Security  or a Wrapper  Provider on its
obligations may result in a decrease in the value of the Portfolio  assets.  The
Wrapper Agreements generally do not protect the Portfolio from loss if an issuer
of  Portfolio   Securities  defaults  on  payments  of  interest  or  principal.
Additionally,  a Fund  shareholder  may  realize  more or less  than the  actual
investment return on the Portfolio  Securities  depending upon the timing of the
shareholder's  purchases  and  redemption  of Shares,  as well as those of other
shareholders.

--------------------------------------------------------------------------------
                                       21

<PAGE>

PreservationPlus Income Portfolio
--------------------------------------------------------------------------------
NOTES TO FINANCIAL STATEMENTS (Unaudited)

NOTE 5--FUTURES CONTRACTS
A summary of obligations under these financial  instruments at March 31, 2000 is
as follows:

<TABLE>
<CAPTION>
                                                                                                      UNREALIZED
                                                                                                     APPRECIATION
TYPES OF FUTURES                       EXPIRATION        CONTRACTS    POSITION    MARKET VALUE      (DEPRECIATION)
-----------------                     -------------   ------------------------------------------------------------
<S>                                   <C>                   <C>         <C>        <C>                <C>
U.S. 10 Year Note Futures             June 22, 2000          82         Long       $ 8,042,396        $ 207,007
U.S. 5 Year Note Futures              June 22, 2000          76         Long         7,486,000           92,283
S&P/Toronto Stock Exchange
   60 Index Futures                   June 16, 2000          53         Long         4,224,214          111,815
Euro Bond Futures                     June 09, 2000          21         Long         2,114,887           22,474
Dax Index Futures                     June 19, 2000          15         Long         2,724,687           28,836
U.S. Long Bond Futures                June 22, 2000          10         Long           976,870           32,768
Tokyo Price Index Futures             June 09, 2000           9         Long         1,495,906           98,733
SPI Futures                           July 04, 2000           3         Long           144,791            1,000
Long Gilt Futures                     June 29, 2000           2         Long           361,618            1,247
FTSE 100 Index Futures                June 19, 2000          (1)       Short          (105,139)             113
Japan 10 Year Bond Futures            June 12, 2000          (1)       Short        (1,281,926)            (242)
Amsterdam Information
   Technology Futures                 June 17, 2000         (14)       Short        (1,910,101)          (8,141)
S&P 500 Index Futures                 June 16, 2000         (16)       Short        (6,061,200)        (521,796)
CAC 40 Euro Index Futures             June 30, 2000         (31)       Short        (1,857,903)         (20,705)
U.S. 10 Year Note Futures             June 22, 2000         (39)       Short        (3,825,042)         (74,035)
Canadian 10 Year Bond Futures         June 22, 2000         (72)       Short        (4,945,780)         (47,616)
U.S. 5 Year Note Futures              June 22, 2000         (76)       Short        (7,486,000)         (66,842)
---------------------------                                ----                    -----------        ---------
Total                                                        21                    $    98,278        $(143,101)
====                                                       ====                    ===========        =========
</TABLE>

NOTE 6--FORWARD FOREIGN CURRENCY CONTRACTS

As of March 31, 2000, the  PreservationPlus  Income  Portfolio had the following
open forward foreign currency contracts:

<TABLE>
<CAPTION>
                                                                                                NET UNREALIZED
                                                                                 VALUE           APPRECIATION
CONTRACTS                       IN EXCHANGE FOR            SETTLEMENT DATE        (US$)      (DEPRECIATION) (US$)
-----------------------------------------------------------------------------------------------------------------
SALES
-----------------------------------------------------------------------------------------------------------------
<S>                    <C>                    <C>             <C>               <C>                 <C>
Australian Dollar      383,000 U.S. Dollars   233,396         4/6/00            $232,814            $ 5,582
Australian Dollar    1,350,000 U.S. Dollars   828,158         4/6/00             820,625              7,533
Canadian Dollar        259,000 U.S. Dollars   178,242         4/5/00             178,658               (416)
Canadian Dollar        918,000 U.S. Dollars   626,142         4/5/00             633,233             (7,091)
-----------------------------------------------------------------------------------------------------------------
                                                                             Total Sales                608
PURCHASES
Euro                  23,000   U.S. Dollars    22,299         4/6/00            $121,986               (313)
Euro                   82,000  U.S. Dollars    79,621         4/6/00              78,386             (1,235)
British Pound          33,000  U.S. Dollars    52,109         4/6/00              52,566                457
British Pound          117,000 U.S. Dollars   183,975         4/6/00             186,369              2,394
-----------------------------------------------------------------------------------------------------------------
                                                                         Total Purchases              1,303
-----------------------------------------------------------------------------------------------------------------
                                                             Net Unrealized Appreciation            $ 1,911
-----------------------------------------------------------------------------------------------------------------
</TABLE>

NOTE 7--PORTFOLIO NAME CHANGE

On January 31, 2000,  the  Portfolio  changed its name from BT  PreservationPlus
Income Portfolio to PreservationPlus Income Portfolio.
--------------------------------------------------------------------------------
                                       22

                                     <PAGE>

                                     <PAGE>

For information on how to invest,  shareholder  account  information and current
price and yield information,  please contact your relationship  manager or write
to us at:

                                    DEUTSCHE ASSET MANAGEMENT SERVICE CENTER
                                    P.O. BOX 219210
                                    KANSAS CITY, MO 64121-9210
or call our toll-free number:       1-800-730-1313

This  report must be preceded or  accompanied  by a current  prospectus  for the
Fund.

PreservationPlus Income                                         CUSIP #055922660
BT INVESTMENT FUNDS                                               1722SA (03/00)

Distributed by:
ICC Distributors, Inc.



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