EATON VANCE SPECIAL INVESTMENT TRUST
N-30D, 1997-09-10
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<PAGE>
 
[LOGO OF EATON      Investing                            [PHOTO OF FINANCIAL 
VANCE MUTUAL        for the                               NEWSPAPER & CALCULATOR
FUNDS APPEARS       21st                                  APPEARS HERE]
HERE]               Century                             


Semiannual Report June 30, 1997


[PHOTO OF                          EV
NYSE FLAG                       MARATHON
APPEARS                          SPECIAL
HERE]                         EQUITIES FUND
                                 
                               Eaton Vance
                    Global management-Global Distribution


[PHOTO OF NYSE APPEARS HERE]


                                                                        Marathon



<PAGE>
 
EV Marathon Special Equities Fund as of June 30, 1997

INVESTMENT UPDATE

[PHOTO OF EDWARD E. SMILEY,
PORTFOLIO MANAGER OMITTED]


Investment Environment
- --------------------------------------------------------------------------------
  The Economy 

 . Economic conditions in the U.S. were very favorable in the first half of 1997.
  Gross Domestic Product (GDP) increased at an annualized rate of 4.9% during
  the first quarter. In the second quarter, the economy slowed somewhat, with
  advance estimates showing an annualized GDP increase of 2.2%.

 . Unemployment remained low throughout the period, hitting a 24-year low of
  4.8% in May and rising slightly to 5.0% in June.

 . Inflation was low throughout the first half of the year, despite continued
  economic growth and a tight labor market. During the first half of 1997, the
  Consumer Price Index (CPI) rose at an annual rate of only 1.4%, the slowest
  rate of increase since 1986. 

  The Markets

 . The sustained growth of the U.S. economy and low inflation have helped propel
  prices of large capitalization stocks to record levels. In the six months
  ended June 30, 1997, the S&P 500 Index had a total return of 20.6%.*

 . An increase in volatility has accompanied higher stock valuations in the first
  half of 1997. Within a six-week period in March and April, the Dow Jones
  Industrial Average declined almost 10%, and then fully recovered to reach new
  record highs.*

 . While the performance of large capitalization stocks has surged in the current
  economic environment, investors have not showed as much enthusiasm for the
  small and mid-capitalization sectors. The total returns of the S&P 400 Mid Cap
  Index and the Russell 2000 Stock Index during the first half of the year were
  13.0% and 10.2%, respectively.*

- --------------------------------------------------------------------------------
Mutual fund shares are not insured by the FDIC and are not deposits or other
obligations of, or guaranteed by, any depository institution. Shares are subject
to investment risks, including possible loss of principal invested.
- --------------------------------------------------------------------------------

The Fund
- --------------------------------------------------------------------------------

  The Past Six Months

 . During the six months ended June 30, 1997, EV Marathon Special Equities Fund
  had a total return of 4.6%./1/

 . This return resulted from a decrease in net asset value to $13.46 per share on
  June 30, 1997 from $13.76 per share on December 31, 1996, and the reinvestment
  of $0.80 per share in capital gains distributions./2/

 . By comparison, the average total return for mutual funds in the Lipper Growth
  Fund Category was 14.3% during this period.*

  Management Discussion

 . The Fund remains focused on the small- and mid-capitalization companies that
  we view as future industry leaders. The Fund's concentrations include the
  networking, specialty software, and communications equipment sectors,
  industries in which order rates remain especially strong in the current
  climate.

 . In the media sector, the Fund had an investment in A.H. Belo Corp. A well-
  managed operator of broadcast and newspaper holdings, Belo includes The Dallas
  Morning News, The Providence Journal, and several West Coast television
  stations in its portfolio.

 . The Fund also maintained a relatively strong exposure to the oil service
  sector and supply sectors through its investments in Camco, Inc., Ensco, Inc.
  and Noble Drilling. In a period of weak oil prices, these service and supply
  companies have fared better than exploration companies and have benefited from
  a consolidation following the industry woes of the late 1980s.

- --------------------------------------------------------------------------------
/1/ This return does not include the maximum applicable 5% contingent deferred
    sales charge (CDSC).
/2/ Returns are calculated by determining the percentage change in net asset
    value (NAV) with all distributions reinvested. SEC average annual returns
    reflect applicable CDSC on the following schedule: 5%-1st and 2nd years; 4%-
    3rd year; 3%-4th year; 2%-5th year; 1%-6th year. Past performance is no
    guarantee of future results. The value of an investment in the Fund will
    fluctuate so that shares, when redeemed, may be worth more or less than
    their original cost.
/3/ Industry sectors and top 10 holdings are as of 6/30/97 and may not be
    representative of the Portfolio's current or future investments. Top 10
    holdings account for 13.94% of the Portfolio's investments, determined by
    dividing the total market value of the holdings by the total net assets of
    the Portfolio.
  * It is not possible to invest directly in an index, average, or Lipper
    Category.
- --------------------------------------------------------------------------------
Fund Information
as of June 30, 1997

Average Annual Total Returns/2/
- --------------------------------------------
One Year                             13.6%
Life of Fund (8/22/94)               14.5

SEC Average Annual Total Returns/2/
- --------------------------------------------
One Year                              8.6%
Life of Fund (8/22/94)               13.4

Five Largest Industry Sectors/3/
- --------------------------------------------
As a percentage of total net assets

Information Services                 19.3%
Health Services                       8.2%
Oil & Gas                             7.9%
Business Products & Services          5.4%
Drugs                                 5.2%

Ten Largest Equity Holdings/3/
- --------------------------------------------
As a percentage of total net assets

A.H. Belo Corp.                       1.6%
Vanstar Corp.                         1.5
Genzyme Corp.                         1.5
BISYS Group                           1.4
MGM Grand                             1.4
Mutual Risk Management                1.4
Sofomor Danek                         1.3
Bed Bath & Beyond                     1.3
Strayer Education                     1.3
Paychex, Inc.                         1.3 

                                       2
<PAGE>
 
EV Marathon Special Equities Fund  as of June 30, 1997

FINANCIAL STATEMENTS (Unaudited)

Statement of Assets and Liabilities                                          

<TABLE>
<CAPTION>
As of June 30, 1997
Assets
- --------------------------------------------------------------------------------
<S>                                                                 <C>
Investment in Special Investment Portfolio, at value
    (Note 1A) (identified cost, $3,118,454)                         $3,298,902
Receivable for Fund shares sold                                         59,787
Receivable from Administrator (Note 4)                                  13,500
Deferred organization expenses (Note 1E)                                21,821
- --------------------------------------------------------------------------------

Total assets                                                        $3,394,010
- --------------------------------------------------------------------------------


Liabilities
- --------------------------------------------------------------------------------
Payable for Fund shares redeemed                                    $       32
Payable to affiliate for Trustees' fees (Note 4)                            23
Accrued expenses                                                         4,488
- --------------------------------------------------------------------------------

Total liabilities                                                   $    4,543
- --------------------------------------------------------------------------------

Net Assets for 251,854 shares of
    beneficial interest outstanding                                 $3,389,467
- --------------------------------------------------------------------------------


Sources of Net Assets
- --------------------------------------------------------------------------------
Paid-in capital                                                     $2,912,220
Accumulated undistributed net realized gain on investments 
    (computed on the basis of identified cost)                         332,641
Accumulated of net investment loss                                     (35,842)
Net unrealized appreciation of investments (computed
    on the basis of identified cost)                                   180,448
- --------------------------------------------------------------------------------

Total                                                               $3,389,467
- --------------------------------------------------------------------------------


Net Asset Value, Offering and Redemption
Price Per Share (Note 6)
- --------------------------------------------------------------------------------
($3,389,467 / 251,854 shares of
     beneficial interest outstanding)                               $    13.46
- --------------------------------------------------------------------------------
</TABLE> 

- --------------------------------------------------------------------------------
Statement of Operations

<TABLE> 
<CAPTION> 
For the Six Months Ended
June 30, 1997
Investment Income
- --------------------------------------------------------------------------------
<S>                                                                 <C> 
Dividend income allocated from Portfolio                            $    1,979
Interest income allocated from Portfolio                                 7,891
Expenses allocated from Portfolio                                      (10,749)
- --------------------------------------------------------------------------------

Total investment loss                                               $     (879)
- --------------------------------------------------------------------------------


Expenses
- --------------------------------------------------------------------------------
Distribution and service fees (Note 5)                              $   13,287
Registration fees                                                       10,673
Printing and postage                                                    10,248
Legal and accounting services                                            5,921
Amortization of organization expenses (Note 1E)                          5,204
Transfer and dividend disbursing agent fees                              1,879
Custodian fee (Note 1C)                                                  1,251
- --------------------------------------------------------------------------------

Total expenses                                                      $   48,463
- --------------------------------------------------------------------------------
Deduct --
    Preliminary allocation of expenses to the                   
        Administrator (Note 4)                                      $   13,500
- --------------------------------------------------------------------------------

Total expense reductions                                            $   13,500
- --------------------------------------------------------------------------------

Net expenses                                                        $   34,963
- --------------------------------------------------------------------------------

Net investment loss                                                 $  (35,842)
- --------------------------------------------------------------------------------


Realized and Unrealized 
Gain (Loss) from Portfolio
- --------------------------------------------------------------------------------
Net realized gain --
    Investment transactions (identified cost basis)                 $  334,456
- --------------------------------------------------------------------------------

Net realized gain on investment transactions                        $  334,456
- --------------------------------------------------------------------------------

Change in unrealized appreciation --
    Investment transactions                                         $ (155,413)
- --------------------------------------------------------------------------------

Net change in unrealized appreciation of investments                $ (155,413)
- --------------------------------------------------------------------------------

Net realized and unrealized gain on investments                     $  179,043
- --------------------------------------------------------------------------------

Net increase in net assets resulting from operations                $  143,201 
- --------------------------------------------------------------------------------
</TABLE> 

                       See notes to financial statements

                                       3
<PAGE>
 
EV Marathon Special Equities Fund as of June 30, 1997

FINANCIAL STATEMENTS CONT'D

Statements of Changes in Net Assets

<TABLE> 
<CAPTION> 

                                         Six Months Ended
Increase (Decrease)                      June 30, 1997      Year Ended
in Net Assets                            (Unaudited)        December 31, 1996
- --------------------------------------------------------------------------------
<S>                                      <C>                <C>  
From operations --
    Net investment loss                        $  (35,842)        $   (51,838)
    Net realized gain on investments              334,456             245,636
    Net change in unrealized appreciation 
        (depreciation) of  investments           (155,413)            157,020
- --------------------------------------------------------------------------------

Net increase in net assets from operations     $  143,201         $   350,818
- --------------------------------------------------------------------------------
Distributions to shareholders (Note 2) --
    From net realized gain on investments      $ (175,515)        $   (44,253)
- --------------------------------------------------------------------------------
Total distributions to shareholders            $ (175,515)        $   (44,253)
- --------------------------------------------------------------------------------
Transactions in shares of beneficial
    interest (Note 3) --
    Proceeds from sale of shares               $1,177,833         $ 2,882,662
    Net asset value of shares issued to 
        shareholders in payment of                           
        distributions declared                    158,966              41,241
    Cost of shares redeemed                      (724,867)         (1,806,992)
- --------------------------------------------------------------------------------

Net increase in net assets from
    Fund share transactions                    $  611,932         $ 1,116,911
- --------------------------------------------------------------------------------

Net increase in net assets                     $  579,618         $ 1,423,476
- --------------------------------------------------------------------------------


Net Assets
- --------------------------------------------------------------------------------
At beginning of period                         $2,809,849         $ 1,386,373
- --------------------------------------------------------------------------------
At end of period                               $3,389,467         $ 2,809,849
- --------------------------------------------------------------------------------


Accumulated net investment loss
included in net assets
- --------------------------------------------------------------------------------
At end of period                               $  (35,842)        $        --
- --------------------------------------------------------------------------------
</TABLE> 
 

                       See notes to fnancial statements

                                       4
<PAGE>
 
EV Marathon Special Equities Fund as of June 30, 1997

FINANCIAL STATEMENTS CONT'D

Financial Highlights

<TABLE> 
<CAPTION> 

                                                                Six Months Ended              Year Ended December 31,
                                                                June 30, 1997      ---------------------------------------------
                                                                (Unaudited)           1996              1995            1994*
- --------------------------------------------------------------------------------------------------------------------------------
<S>                                                                 <C>              <C>               <C>             <C> 
Net asset value -- Beginning of period                              $13.760          $ 11.660          $ 9.810         $ 10.000
- --------------------------------------------------------------------------------------------------------------------------------

Income (loss) from operations
- --------------------------------------------------------------------------------------------------------------------------------
Net investment loss                                                 $(0.142)         $ (0.254)         $(0.165)        $ (0.021)
Net realized and unrealized gain (loss) on investments                0.642             2.579            2.090           (0.169)
- --------------------------------------------------------------------------------------------------------------------------------
Total income (loss) from operations                                 $ 0.500          $  2.325          $ 1.925         $ (0.190)
- --------------------------------------------------------------------------------------------------------------------------------


Less distributions
- --------------------------------------------------------------------------------------------------------------------------------
From net realized gain on investments                               $(0.800)         $ (0.225)         $    --         $     --
In excess of net realized gain on investments                            --                --           (0.075)              --
- --------------------------------------------------------------------------------------------------------------------------------
Total distributions                                                 $(0.800)         $ (0.225)         $(0.075)        $     --
- --------------------------------------------------------------------------------------------------------------------------------


Net asset value -- End of period                                    $13.460          $ 13.760          $11.660         $  9.810
- --------------------------------------------------------------------------------------------------------------------------------

Total Return /(1)/                                                     4.58%            20.02%           19.64%           (1.90)%
- --------------------------------------------------------------------------------------------------------------------------------


Ratios/Supplemental Data ++
- --------------------------------------------------------------------------------------------------------------------------------
Net assets, end of period (000 omitted)                             $ 3,389          $  2,810          $ 1,386         $    623
Ratio of net expenses to average daily net assets /(2)/                3.20%+            3.41%            3.21%            3.05%+
Ratio of net investment loss to average daily net assets /(2)/        (2.51)%+          (2.49)%          (2.31)%          (2.00)%+
</TABLE> 
++   The operating expenses of the Fund and the Portfolio may reflect a
      reduction of the Investment Adviser fee, an allocation of expenses to the
      Administrator, or both. Had such actions not been taken, the ratios and
      net investment income (loss) per share would have been as follows:
<TABLE> 
<CAPTION> 
Ratios (As a percentage of average daily net assets):
<S>                                                                 <C>              <C>              <C>              <C> 
    Expenses /(2)/                                                     4.14%+            4.94%            9.54%            9.55%+
    Net investment loss /(2)/                                         (3.45)%+          (0.96)%          (8.65)%          (8.50)%+
Net investment loss per share                                       $(0.196)         $ (0.410)         $(0.617)        $ (0.092)
- --------------------------------------------------------------------------------------------------------------------------------
</TABLE> 
+    Annualized.
*    For the period from the start of business, August 22, 1994, to December
     31, 1994.
/(1)/Total return is calculated assuming a purchase at the net asset value on
     the first day and a sale at the net asset value on the last day of each
     period reported. Dividends and distributions, if any, are assumed to be
     reinvested at the net asset value on the payable date. Total return is not
     computed on an annualized basis.
/(2)/Includes the Fund's share of its corresponding Portfolio's allocated
     expenses.

                       See notes to financial statements

                                       5
<PAGE>
 
EV Marathon Special Equities Fund as of June 30, 1997

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D


1 Significant Accounting Policies
  ------------------------------------------------------------------------------
  EV Marathon Special Equities Fund (the Fund), a Massachusetts business trust,
  is registered under the Investment Company Act of 1940, as amended, as a
  diversified open-end management investment company. The Fund is a series in
  the Eaton Vance Special Investment Trust. The Fund invests all of its
  investable assets in interests in the Special Investment Portfolio (the
  Portfolio), a New York Trust, having the same investment objective as the
  Fund. The value of the Fund's investment in the Portfolio reflects the Fund's
  proportionate interest in the net assets of the Portfolio (4.1% at June 30,
  1997). The performance of the Fund is directly affected by the performance of
  the Portfolio. The financial statements of the Portfolio, including the
  portfolio of investments, are included elsewhere in this report and should be
  read in conjunction with the Fund's financial statements. The following is a
  summary of significant accounting policies consistently followed by the Fund
  in the preparation of its financial statements. The policies are in conformity
  with generally accepted accounting principles.

  A Investment Valuations -- Valuations of securities by the portfolio is
  discussed in Note 1A of the Portfolio's Notes to Financial Statements which
  are included elsewhere in this report.

  B Income -- The Fund's net investment income consists of the Fund's pro rata
  share of the net investment income of the Portfolio, less all actual and
  accrued expenses of the Fund.

  C Expense Reduction -- Investors Bank & Trust Company (IBT) serves as
  custodian of the Fund. Pursuant to the custodian agreement, IBT receives a
  fee reduced by credits which are determined based on the average daily cash
  balances the Fund maintains with IBT. All significant credit balances used
  to reduce the Fund's custodian fees are reported as a reduction of expenses
  on the Statement of Operations.

  D Federal Taxes -- The Fund's policy is to comply with the provisions of the
  Internal Revenue Code applicable to regulated investment companies and to
  distribute to shareholders each year all of its taxable income, including
  any net realized gain on investments, option and financial futures
  transactions. Accordingly, no provision for federal income or excise tax is
  necessary.

  E Deferred Organization Expenses -- Costs incurred by the Fund in connection
  with its organization are being amortized on the straight-line basis over
  five years.

  F Other -- Investment transactions are accounted for on a trade date basis.

  G Use of Estimates -- The preparation of the financial statements in
  conformity with generally accepted accounting principles requires management
  to make estimates and assumptions that affect the reported amounts of assets
  and liabilities at the date of the financial statements and the reported
  amounts of income and expense during the reporting period. Actual results
  could differ from those estimates.

2 Distributions to Shareholders
  ------------------------------------------------------------------------------
  The Fund's present policy is to make a distribution at least annually of the
  net investment income allocated to the Fund by the Portfolio (less the Fund's
  direct and allocated expenses) and to distribute at least annually any net
  realized capital gains so allocated. Distributions are paid in the form of
  additional shares of the Fund or, at the election of the shareholder, in cash.
  The Fund distinguishes between distributions on a tax basis and a financial
  reporting basis. Generally accepted accounting principles require that only
  distributions in excess of tax basis earnings and profits be reported in the
  financial statements as a return of capital. Differences in the recognition or
  classification of income between the financial statements and tax earnings and
  profits which result in overdistributions only for financial statement
  purposes are classified as distributions in excess of net investment income or
  accumulated net realized gains. Permanent differences between book and tax
  accounting relating to distributions are reclassified to paid-in capital.


                                       6
<PAGE>
 
EV Marathon Special Equities Fund as of June 30, 1997

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D


3 Shares of Beneficial Interest
  ------------------------------------------------------------------------------
  The Declaration of Trust permits the Trustees to issue an unlimited number
  of full and fractional shares of beneficial interest (without par value).
  Transactions in Fund shares were as follows:
  <TABLE> 
  <CAPTION> 
                                  Six Months Ended    Year Ended
                                  June 30, 1997       December 31, 1996
                                  (Unaudited)
  ------------------------------------------------------------------------------
   <S>                            <C>                 <C> 
   Sales                                    90,729                227,080

   Issued to shareholders electing 
     to receive payments of 
     distributions in Fund shares           13,738                  3,138 

   Redemptions                             (56,831)              (144,920)
  ------------------------------------------------------------------------------
  
   Net increase                             47,636                 85,298
  ------------------------------------------------------------------------------
</TABLE> 

4 Transactions with Affiliates
  ------------------------------------------------------------------------------
  Eaton Vance Management (EVM) serves as the administrator of the Fund, but
  receives no compensation. The Portfolio has engaged Boston Management and
  Research (BMR), a subsidiary of EVM, to render investment advisory services.
  See Note 3 of the Portfolio's Notes to Financial Statements which are included
  elsewhere in this report. To reduce the net operating loss of the Fund for the
  six months ended June 30, 1997, $13,500 of expenses related to its operation
  were allocated, on a preliminary basis, to EVM. Except as Trustees of the Fund
  and the Portfolio who are not members of EVM's or BMR's organizations,
  officers and Trustees receive remuneration for their services to the Fund out
  of the investment adviser fee. Certain of the officers and Trustees of the
  Fund and Portfolio are officers and directors/trustees of the above
  organizations.


5 Distribution Plan
  ------------------------------------------------------------------------------
  The Fund has adopted a distribution plan (the Plan) pursuant to Rule 12b-1
  under the Investment Company Act of 1940. The Plan requires the Fund to accrue
  amounts daily to the principal underwriter, Eaton Vance Distributors, Inc.
  (EVD) equal to 1/365 of 0.75% of the Fund's average daily net assets, for
  providing ongoing distribution services and facilities to the Fund. The Fund
  will automatically discontinue accruals to EVD during any period in which
  there are no outstanding Uncovered Distribution Charges, which are equivalent
  to the sum of (i) 5% of the aggregate amount received by the Fund for the
  shares sold plus, (ii) distribution fees calculated by applying the rate of 1%
  over the prevailing prime rate to the outstanding balance of Uncovered
  Distribution Charges of EVD, reduced by the aggregate amount of contingent
  deferred sales charges (see Note 6) and amounts theretofore paid to EVD.

  The amount payable to EVD with respect to each day is accrued on such day as a
  liability of the Fund and, accordingly, reduces the Fund's net assets. Such
  payments would cease upon termination of the distribution agreement (unless
  made in accordance with another distribution agreement). As a result, the Fund
  does not accrue amounts which may become payable to EVD in the future because
  the conditions for recording any contingent liability under generally accepted
  accounting principles have not been satisfied. EVD earned $10,726 for the six
  months ended June 30, 1997, representing 0.75% (annualized) of average daily
  net assets. At June 30, 1997, the amount of Uncovered Distribution Charges to
  EVD calculated under the Plan was approximately $74,000.

  In addition, the Plan authorizes the Fund to make payments of service fees to
  the Principal Underwriter, Authorized Firms and other persons in amounts not
  exceeding 0.25% of the Fund's average daily net assets for each fiscal year.
  The Trustees have implemented the Plan by authorizing the Fund to make
  quarterly payments of service fees to the Principal Underwriter and Authorized
  Firms in amounts not expected to exceed 0.25%, of the Fund's average daily net
  assets for each fiscal year based on the value of Fund shares sold by such
  persons and remaining outstanding for at least twelve months. During the six
  months ended June 30, 1997, the Fund provided for $2,561 under the Plan to the
  Principal Underwriter and Authorized Firms. Service fees are separate and
  distinct from the sales commissions and distribution fees payable by the Fund
  to EVD, and, as such, are not subject to automatic discontinuance where there
  are no outstanding Uncovered Distribution Charge of EVD.

  Certain of the officers of the Fund and Directors of the Corporation are
  officers or directors of EVD.


6 Contingent Deferred Sales Charges
  ------------------------------------------------------------------------------
  A contingent deferred sales charge (CDSC) is imposed on any redemption of Fund
  shares made within six years of purchase. Generally, the CDSC is based upon
  the lower of the net asset value at date of redemption or date of purchase. No
  charge is levied on shares acquired by

                                       7
<PAGE>
 
EV Marathon Special Equities Fund as of June 30, 1997

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D



  reinvestment of dividends or capital gain distributions. The CDSC is imposed
  at declining rates that begin at 5% in the first and second year of redemption
  after purchase, declining one percentage point each year. No CDSC is levied on
  shares which have been sold to EVM or its affiliates or to their respective
  employees or clients. CDSC charges are paid to EVD to reduce the amount of
  Uncovered Distribution Charges calculated under the Fund's Distribution Plan.
  CDSC charges received when no Uncovered Distribution Charges exist will be
  retained by the Fund. EVD received approximately $6,000 of CDSC paid by
  shareholders for the six months ended June 30, 1997.


7 Investment Transactions
  ------------------------------------------------------------------------------
  Increases and decreases in the Fund's investment in the Portfolio aggregated
  $1,178,867 and $817,461, respectively.

                                       8
<PAGE>
 
Special Investment Portfolio as of June 30, 1997

PORTFOLIO OF INVESTMENTS (Unaudited)

<TABLE> 
<CAPTION> 

Common Stocks -- 91.8%                                                          


Security                                      Shares             Value
- --------------------------------------------------------------------------------
<S>                                           <C>                <C>   

Advertising -- 1.5%
- --------------------------------------------------------------------------------
Catalina Marketing Corp.                       14,000            $   673,750
Specialized market research.
Outdoor Systems, Inc.                          14,940                571,455
Dominant operator of outdoor advertising.
- --------------------------------------------------------------------------------
                                                                 $ 1,245,205
- --------------------------------------------------------------------------------

Banks - Regional -- 0.6%
- --------------------------------------------------------------------------------
Colonial Bancgroup, Inc.                       21,000            $   509,250
Emerging banking company in the 
Southeastern U.S.
- --------------------------------------------------------------------------------
                                                                 $   509,250
- --------------------------------------------------------------------------------

Banks and Money Services -- 1.6%
- --------------------------------------------------------------------------------
Bank United, Corp., Class A                    12,000            $   456,000
Operates 70 branch bank system in Texas.
First USA Paymentech, Inc.*                    28,000                810,250
Payment processor of merchant credit
card transactions.
- --------------------------------------------------------------------------------
                                                                 $ 1,266,250
- --------------------------------------------------------------------------------

Broadcasting and Cable -- 2.7%
- --------------------------------------------------------------------------------
Emmis Broadcasting Corp., Class A*             15,000            $   654,375
Diversified media company.
Jacor Communications, Inc.*                    16,500                631,125
Rapidly growing operator of radio stations 
and syndicated programming.
Lin Television Corp.*                          20,000                882,500
Commercial television broadcast company.
- --------------------------------------------------------------------------------
                                                                 $ 2,168,000
- --------------------------------------------------------------------------------

Building Materials -- 0.9%
- --------------------------------------------------------------------------------
Texas Industries, Inc.                         28,000            $   743,750
Regional producer of building products 
in the Southwest.
- --------------------------------------------------------------------------------
                                                                 $   743,750
- --------------------------------------------------------------------------------

Business Products and Services -- 5.4%
- --------------------------------------------------------------------------------
CN Maximus, Inc.*                                 950            $    16,981
Management consulting group.
Ecolab, Inc.                                    9,000                429,750
Producer of industrial cleaning products
G and K Services, Inc.                         23,000                856,750
Rents and launders uniforms and other 
textile products.
Gartner Group, Inc.-Class A*                    8,500                305,469
Leading consultant on high tech
equipment purchases.
Personnel Group of America, Inc.*              15,000                432,188
Temporary employment company.
Precision Response Corp.*                      28,000                462,000
Inbound calling marketing company.
Teletech Holdings, Inc.*                       26,000                682,500
Inbound calling marketing company.
Vanstar Corp.*                                 85,000              1,200,624
Value added reseller providing
corporations with computing solutions.
- --------------------------------------------------------------------------------
                                                                 $ 4,386,262
- --------------------------------------------------------------------------------

Communication Services -- 2.0%
- --------------------------------------------------------------------------------
Sterling Commerce, Inc.*                       25,000            $   821,875
Provides electronic data interchange services.
Transition Systems, Inc.*                      45,000                818,438
Healthcare information systems.
- --------------------------------------------------------------------------------
                                                                 $ 1,640,313
- --------------------------------------------------------------------------------

Communications Equipment -- 4.2%
- --------------------------------------------------------------------------------
Ascend Communications, Inc.*                   15,000            $   590,625
Manufacturer of high speed 
telecommunications products.
Brooktrout Technology, Inc.*                   33,000                391,875
Provides telecom equipment specialty           
products.           
Comverse Technology, Inc.*                      8,000                416,000
Specialized communications products. 
Davox Corp.                                     7,500                268,125
Designs and manufactures specialized 
telecom products.
ECI Telecommunications                         20,000                595,000
A company that produces advanced 
telecommunications equipment.
</TABLE> 

                       See notes to financial statements

                                       9
<PAGE>
 
Special Investment Portfolio as of June 30, 1997

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D

<TABLE> 
<CAPTION> 

Security                                      Shares               Value        
- --------------------------------------------------------------------------------
<S>                                           <C>                  <C>   

Communications Equipment (continued)
- --------------------------------------------------------------------------------
Glenayre Technologies, Inc.                      27,010            $   442,289
Leading supplier of wireless 
communications equipment.
Mosaix, Inc.*                                    30,000                408,750
Manufacturer of specialized 
telecommunications products.
Natural Microsystems Corp.                        8,000                288,000
Manufacturer of specialized 
telecommunications products.
- --------------------------------------------------------------------------------
                                                                   $ 3,400,664
- --------------------------------------------------------------------------------

Consumer Services -- 1.3%
- --------------------------------------------------------------------------------
Strayer Education, Inc.                          27,910            $ 1,060,580
Specialized supplemental education services.
- --------------------------------------------------------------------------------

                                                                   $ 1,060,580
- --------------------------------------------------------------------------------

Drugs -- 5.2%
- --------------------------------------------------------------------------------
Curative Health Services, Inc.*                  25,000            $   718,750
Operator of specialty burn unit clinics.
Elan Corp., PLC ADR*                             17,000                769,250
Specialty pharmaceutical.
Genzyme Corp.*                                   40,000                405,000
Leading researcher in gene therapy.
Genzyme Corp. Class A                            43,000              1,193,249
Diversified biotechnology pharmaceuticals. 
Parexel International Corp.                      23,000                730,250
Contract research services for large
drug companies.
Roberts Pharmaceutical Corp.*                    40,000                447,500
Diversified health care products.
- --------------------------------------------------------------------------------
                                                                   $ 4,263,999
- --------------------------------------------------------------------------------

Electrical Equipment -- 1.5%
- --------------------------------------------------------------------------------
Chicago Minature Lamp, Inc.                       7,000            $   174,125
Niche marketer of lighting products.
Level One Communications, Inc.*                   8,000                307,500
Designs and sells integrated circuits.
Linear Technology Corp.                          14,000                724,500
Manufacturer of high performance
linear integrated circuits.
- --------------------------------------------------------------------------------
                                                                   $ 1,206,125
- --------------------------------------------------------------------------------


Electronics - Semiconductors -- 0.8%
- --------------------------------------------------------------------------------
Cypress Semiconductor Corp.*                     45,000            $   652,500
Innovative semiconductor manufacturer.
- --------------------------------------------------------------------------------
                                                                   $   652,500
- --------------------------------------------------------------------------------

Entertainment -- 3.4%
- --------------------------------------------------------------------------------
MGM Grand, Inc.*                                 31,000            $ 1,146,999
Operator of MGM Grand Hotel in Las Vegas. 
Mirage Resorts, Inc.                             32,000                808,000
Nevada based gaming resort operator.
Regal Cinemas                                    17,000                561,000
Rapidly growing theater chain.
Speedway Motorsports*                            13,500                293,625
Large operator of NASCAR tracks.
- --------------------------------------------------------------------------------
                                                                   $ 2,809,624
- --------------------------------------------------------------------------------

Financial - Miscellaneous -- 0.6%
- --------------------------------------------------------------------------------
Capital One Financial Corp.                      12,000            $   453,000
Leading credit card services specialists.
- --------------------------------------------------------------------------------
                                                                   $   453,000
- --------------------------------------------------------------------------------

Health Services -- 8.2%
- --------------------------------------------------------------------------------
American Retirement Corp.*                       40,000            $   710,000
Assisted living services.
Express Scripts, Inc., Class A*                  15,000                626,250
Rapidly growing pharmacy specialist.
Genesis Health Ventures, Inc.*                   30,000              1,012,500
Nursing home chain.
Health Management Associates, Inc.               31,000                883,500
Class A*
Hospital chain.
MiniMed, Inc.*                                   29,000                772,125
Developer and manufacturer of
medical devices focusing on diabetics.
National Surgery Centers, Inc.*                  12,000                424,500
Operator of independent surgery units.
Omnicare, Inc.                                   27,000                847,125
Provides pharmacy services to retirement
centers.
Pediatrix Medical Group, Inc.*                   22,000              1,007,875
Operates pediatric care units.
PhyCor, Inc.*                                    13,000                447,688
Physicians practice management.
- --------------------------------------------------------------------------------
                                                                   $ 6,731,563
- --------------------------------------------------------------------------------
</TABLE> 
                       See notes to financial statements

                                       10
<PAGE>
 
Special Investment Portfolio as of June 30, 1997

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D

<TABLE> 
<CAPTION> 


Security                                        Shares             Value        
- --------------------------------------------------------------------------------
<S>                                             <C>                <C> 
                                                                              
Household Products -- 0.7%
- --------------------------------------------------------------------------------
Sola International*                              17,000            $   569,500
Specialty eye care products.
- --------------------------------------------------------------------------------
                                                                   $   569,500
- --------------------------------------------------------------------------------


Information Services -- 19.3%
- --------------------------------------------------------------------------------
Acxiom Corp.                                     23,000            $   471,500
Database information services.
Affiliated Computer Services, Inc. Class A       30,000                840,000
Nationwide provider of information 
processing services.
Aspect Development, Inc.*                         5,988                156,062
Information processing services specialist.
Aspen Technologies, Inc.                         27,000              1,015,875
Specialty software for upgrading 
manufacturing plants.
BISYS Group, Inc.*                               28,000              1,168,999
Services financial institutions with computer, 
administrative and marketing support data
processing services.
Cambridge Technology Partners, Inc.*             31,000                992,000
Software consulting company.
CCC Information Services Group*                  37,000                721,500
Automotive repair information specialist. 
Claremont Technology Group, Inc.*                17,000                403,750
Management consulting services.
Cognos, Inc.*                                    30,000                933,750
Computer tool developer and supporter.
FIserv, Inc.*                                    22,300                995,138
Provider of data processing services to banks 
and savings institutions, benefiting from 
outsourcing trend.
Harbinger, Corp.                                 27,000                756,000
Electronic Data Interchange products and 
services.
IDX Systems Corp.*                               21,000                724,500
Healthcare information systems.
Medic Computer Systems, Inc.                     24,000                534,000
Physicians information company.
National Data Corp.                              10,000                433,125
Information technology services provider. 
Nova Corp. Georgia*                              36,000                933,750
Nation's largest bankcard processor
Paychex, Inc.                                    27,000              1,026,000
Payroll and corporate information services.
Pegasystems, Inc.*                               26,000                815,750
Marketing information specialist.
PRI Automation, Inc.                             14,000                531,125
Material handling equipment for high cost
semiconductor wafers.
Information Services (continued)
Scopus Technology, Inc.                          35,018                783,528
A leading provider of software.
SunGard Data Systems, Inc.*                      20,000                930,000
Data storage and emergency back up products. 
Veritas Software Co.                             12,000                603,000
Provides communications companies with 
software measuring systems.
- --------------------------------------------------------------------------------
                                                                   $15,769,352
- --------------------------------------------------------------------------------

Insurance -- 3.3%
- --------------------------------------------------------------------------------
CRA Managed Care, Inc.*                          15,000            $   782,813
Workers compensation company.
HCC Insurance Holdings, Inc.                     30,000                800,625
Emerging specialty insurance provider.
Mutual Risk Management Ltd.                      24,003              1,101,151
Specialty insurer focusing on workmen's
compensation.
- --------------------------------------------------------------------------------
                                                                   $ 2,684,589
- --------------------------------------------------------------------------------


Investment Services -- 3.7%
- --------------------------------------------------------------------------------
Centura Banks, Inc.                              17,500            $   802,813
Growing Southeastern bankers.
PMI Group, Inc.                                  15,000                935,625
Specialty financial products.
Sovereign Bancorp, Inc.                          50,000                762,500
A thrift holding company.
The Money Store, Inc.                            18,000                516,375
Diversified finance specialist.
- --------------------------------------------------------------------------------
                                                                   $ 3,017,313
- --------------------------------------------------------------------------------

Leisure Equipment -- 0.4%
- --------------------------------------------------------------------------------
Cannondale Corp.*                                17,000            $   301,750
Designer and manufacturer of high end bikes.
- --------------------------------------------------------------------------------
                                                                   $   301,750
- --------------------------------------------------------------------------------


Lodging and Gaming -- 1.6%
- --------------------------------------------------------------------------------

Promus Hotel Corp.*                              23,000            $   891,250
Owner and operator of Embassy Suite and 
Hampton Inn hotels.
Station Casinos, Inc.*                           50,000                418,750
Operates casinos in Nevada and Kansas City. 
- --------------------------------------------------------------------------------
                                                                   $ 1,310,000
- --------------------------------------------------------------------------------
</TABLE> 
                       See notes to financial statements

                                       11
<PAGE>
 
Special Investment Portfolio as of June 30, 1997    
                                                     
PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D          

<TABLE> 
<CAPTION> 

Security                                      Shares               Value        
- --------------------------------------------------------------------------------
<S>                                           <C>                  <C> 
Machinery -- 0.9%
- --------------------------------------------------------------------------------
Camco International, Inc.                        14,000            $   766,500
Oilfield services.
- --------------------------------------------------------------------------------
                                                                   $   766,500
- --------------------------------------------------------------------------------

Medical Products -- 4.4%
- --------------------------------------------------------------------------------
Acuson Corp.*                                    25,000            $   575,000
Medical testing equipment.
Arterial Vascular Engineering, Inc.*             25,000                804,688
Growing provider of stents in Europe.
Heartstream, Inc.*                               39,000                341,250
Portable defibrillator products.
Invacare Corp.                                   19,000                444,125
Provider of diverse medical products.
Physio-Control International Corp.*              22,000                330,000
Portable defibrillator products.
Sofamor Danek Group, Inc.*                       24,000              1,098,000
Leading developer/manufacturer of spinal 
Implant devices. Company markets products 
internationally.
- --------------------------------------------------------------------------------
                                                                   $ 3,593,063
- --------------------------------------------------------------------------------
 
Oil and Gas - Equipment and Services -- 0.6%
- --------------------------------------------------------------------------------
Ensco International, Inc.*                       10,000            $   527,500
Largest operator of premium jackup oil rigs.
- --------------------------------------------------------------------------------
                                                                   $   527,500
- --------------------------------------------------------------------------------

Oil and Gas - Exploration and Production -- 7.3%
- --------------------------------------------------------------------------------
Abacan Resources Corp.                           50,000            $   159,375
International oil exploration.
American Exploration Co.                         37,000                541,125
Merging with Louis Dreyfus Natural Gas.
Anadarko Petroleum Corp.                         11,000                660,000
A leading independent company in
oil and gas exploration,
development and production.
Cairn Energy USA, Inc.                           43,000                564,375
Energy company that is exploring sale
of company.
Louisiana Land & Exploration Corp.               14,000                799,750
Undervalued medium sized diversified
energy exploration.
Noble Affiliates, Inc.                           17,000                657,688
An independent energy company that             
specializes in oil and gas
exploration and production.
Noble Drilling, Inc.                             33,000                744,563
Oil and gas well drilling.
Nuevo Energy Co.                                 14,000                574,000
Diversified energy exploration with 
aggressive drilling program.
Swift Energy Co.                                 24,000                573,000
Emerging energy exploration company 
focusing on Texas properties.
Triton Energy Ltd.                               15,000                687,188
International oil and gas exploration
and development.
- --------------------------------------------------------------------------------
                                                                   $ 5,961,064
- --------------------------------------------------------------------------------

Publishing -- 2.0%
- --------------------------------------------------------------------------------
A.H. Belo Corp.                                  31,927            $ 1,328,969
Publishes Dallas Morning News and
Providence Journal; also operates
T.V. and radio properties.
Franklin Covey Co.*                              13,000                329,063
Time management seminars and products.
- --------------------------------------------------------------------------------
                                                                   $ 1,658,032
- --------------------------------------------------------------------------------

Retail - Food and Drug -- 2.3%
- --------------------------------------------------------------------------------
Papa John's International, Inc.                  25,000            $   918,750
Rapidly growing restaurant chain.
Starbucks Corp.                                  25,000                973,438
High quality specialty retailer.
- --------------------------------------------------------------------------------
                                                                   $ 1,892,188
- --------------------------------------------------------------------------------

Retail - Specialty and Apparel -- 4.2%
- --------------------------------------------------------------------------------
Ann Taylor Stores Corp.*                         16,000            $   312,000
Leading vendor of women's apparel.
Bed Bath and Beyond, Inc.*                       35,000              1,063,125
Specialty retailer.
Claires Stores, Inc.                             40,000                700,000
Fashion items for teenagers.
Gadzooks, Inc.*                                  12,000                234,000
Specialty retailer of teenage apparel.
K&G Mens Center, Inc.                             9,000                195,750
Innovative retailer of men's clothing
Pacific Sunwear of California, Inc.               5,000                161,250
Specialty retailer of teenage apparel.
Polo Ralph Lauren Corp., Class A*                 3,700                101,288
A designer of men's and women's clothing.
The Mens Wearhouse, Inc.*                        21,000                661,500
Specialty apparel chain.
- --------------------------------------------------------------------------------
                                                                   $ 3,428,913
- --------------------------------------------------------------------------------
</TABLE> 
                       See notes to financial statements

                                       12
<PAGE>
 
Special Investment Portfolio as of June 30, 1997

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D

<TABLE> 
<CAPTION> 

Security                                        Shares             Value        
- --------------------------------------------------------------------------------
<S>                                             <C>                <C> 
Transportation -- 1.2%
- --------------------------------------------------------------------------------
Comair Holdings, Inc.                            36,000            $   996,750
Regional airline holding company.
- --------------------------------------------------------------------------------
                                                                   $   996,750
- --------------------------------------------------------------------------------

Total Common Stocks
    (identified cost $61,601,380)                                  $75,013,599
- --------------------------------------------------------------------------------
<CAPTION> 

Commercial Paper -- 7.4%
                                                 Principal
                                                 Amount
                                                 (000              
Security                                         Omitted)          Value
- --------------------------------------------------------------------------------
<S>                                              <C>               <C> 
Cut Group, 6.25%, 7/1/97                         $2,524            $ 2,523,562
Ford Motor Credit Co., 5.56%, 7/9/97              3,500              3,492,432
- --------------------------------------------------------------------------------

Total Commercial Paper
    (amortized cost $6,015,994)                                    $ 6,015,994
- --------------------------------------------------------------------------------

Total Investments -- 99.2%
    (identified cost $67,617,374)                                  $81,029,593
- --------------------------------------------------------------------------------

Other Assets, Less Liabilities -- 0.8%                             $   659,157
- --------------------------------------------------------------------------------


Net Assets -- 100%                                                 $81,688,750
- --------------------------------------------------------------------------------
</TABLE> 

ADR -- American Depositary Receipt
*   Non-income producing security.



                       See notes to financial statements

                                       13
<PAGE>
 
Special Investment Portfolio as of June 30, 1997

FINANCIAL STATEMENTS (Unaudited)

Statement of Assets and Liabilities                  

<TABLE>
<CAPTION>
                                           
As of June 30, 1997
Assets
- --------------------------------------------------------------------------------
<S>                                                               <C>
Investments, at value (Note 1A)                          
    (identified cost, $67,617,374)                                $81,029,593
Cash                                                                    1,219
Receivable for investments sold                                       801,973
Interest and dividends receivable                                       7,009
Deferred organization expenses (Note 1E)                                6,604
- --------------------------------------------------------------------------------
Total assets                                                      $81,846,398
- --------------------------------------------------------------------------------
                                                         
                                                         
Liabilities                                              
- --------------------------------------------------------------------------------
Payable for investments purchased                                 $   141,972
Payable to affiliate for Trustees' fees (Note 3)                        1,700
Accrued expenses                                                       13,976
- --------------------------------------------------------------------------------
Total liabilities                                                 $   157,648
- --------------------------------------------------------------------------------
Net Assets applicable to investors' interest in Portfolio         $81,688,750
- --------------------------------------------------------------------------------
                                                         
                                                         
Sources of Net Assets                                    
- --------------------------------------------------------------------------------
Net proceeds from capital contributions and withdrawals           $68,276,531
Net unrealized appreciation of investments               
    (computed on the basis of identified cost)                     13,412,219
- --------------------------------------------------------------------------------
Total                                                             $81,688,750
- --------------------------------------------------------------------------------
<CAPTION>                                                          
                                                         
Statement of Operations                                  

For the Six Months Ended                                 
June 30, 1997                                            
Investment Income (Note 1B & 1D)                         
- --------------------------------------------------------------------------------
<S>                                                               <C> 
Dividend income                                                   $    52,062
Interest income                                                       211,694
- --------------------------------------------------------------------------------
Total income                                                      $   263,756
- --------------------------------------------------------------------------------
                                                         
                                                         
Expenses                                                 
- --------------------------------------------------------------------------------
Investment adviser fee (Note 3)                                   $   237,360
Compensation of Trustees not members of the              
    Investment Adviser's organization (Note 3)                          2,632
Custodian fee (Note 1C)                                                33,133
Legal and accounting services                                           9,020
Amortization of organization expenses (Note 1E)                         1,549
Miscellaneous                                                           1,679
- --------------------------------------------------------------------------------
Total expenses                                                    $   285,373
- --------------------------------------------------------------------------------
                                                         
Net investment loss                                               $   (21,617)
- --------------------------------------------------------------------------------
                                                         
                                                         
Realized and Unrealized                                  
Gain (Loss) on Investments                               
- --------------------------------------------------------------------------------
Net realized gain --                                     
    Investment transactions (identified cost basis)               $ 9,737,492
- --------------------------------------------------------------------------------
Net realized gain on investments                                  $ 9,737,492
- --------------------------------------------------------------------------------
Change in unrealized appreciation --                     
    Investments (identified cost basis)                           $(5,492,823)
- --------------------------------------------------------------------------------
Net change in unrealized appreciation                             $(5,492,823)
- --------------------------------------------------------------------------------
                                                         
Net realized and unrealized gain on investments                   $ 4,244,669
- --------------------------------------------------------------------------------
                                                         
Net increase in net assets resulting from operations              $ 4,223,052
- --------------------------------------------------------------------------------
</TABLE>


                       See notes to financial statements
                                    
                                      14
<PAGE>
 
Special Investment Portfolio as of June 30, 1997

FINANCIAL STATEMENTS CONT'D

Statements of Changes in Net Assets
<TABLE>
<CAPTION>


                                         Six Months Ended
Increase (Decrease)                      June 30, 1997       Year Ended
in Net Assets                            (Unaudited)         December 31, 1996
- --------------------------------------------------------------------------------
<S>                                      <C>                 <C>

From operations --
    Net investment income (loss)             $    (21,617)        $    135,724
    Net realized gain on investments            9,737,492           18,226,741
    Net change in unrealized 
        appreciation of investments            (5,492,823)          (1,762,538)
- --------------------------------------------------------------------------------
    Net increase in net assets
        from operations                      $  4,223,052         $ 16,599,927
- --------------------------------------------------------------------------------
Capital transactions --
    Contributions                            $ 13,232,554         $ 10,738,468
    Withdrawals                               (18,714,130)         (18,331,396)
- --------------------------------------------------------------------------------
Net decrease in net assets
    from capital transactions                $ (5,481,576)        $ (7,592,928)
- --------------------------------------------------------------------------------

Net increase (decrease) in net assets        $ (1,258,524)        $  9,006,999
- --------------------------------------------------------------------------------

Net Assets
- --------------------------------------------------------------------------------
At beginning of period                       $ 82,947,274         $ 73,940,275
- --------------------------------------------------------------------------------
At end of period                             $ 81,688,750         $ 82,947,274
- --------------------------------------------------------------------------------
</TABLE>


                       See notes to financial statements

                                       15
<PAGE>
 
Special Investment Portfolio as of June 30, 1997

FINANCIAL STATEMENTS CONT'D

Supplementary Data
<TABLE>
<CAPTION>
                                                      Six Months Ended                  Year Ended December 31,
                                                      June 30, 1997       ----------------------------------------------
                                                      (Unaudited)             1996             1995           1994*
- ------------------------------------------------------------------------------------------------------------------------
<S>                                                   <C>              <C>              <C>              <C>
Ratios to average daily net assets
- ------------------------------------------------------------------------------------------------------------------------
Expenses                                                     0.76%+           0.76%            0.77%            0.74%+
Net investment income (loss)                                (0.06)%+          0.18%            0.19%            0.20%+

Portfolio Turnover                                            110%              91%              81%              19%
- ------------------------------------------------------------------------------------------------------------------------
Average commission rate (per share)/(1)/                 $ 0.0590         $ 0.0579         $     --         $     --
- ------------------------------------------------------------------------------------------------------------------------
Net assets, end of period (000s omitted)                 $ 81,689         $ 82,947         $ 73,940         $ 64,442
- ------------------------------------------------------------------------------------------------------------------------
</TABLE>
+    Annualized.
*    For the period from the start of business, August 1, 1994, to December 31,
     1994.
/(1)/Average commission rate paid is computed by dividing the total dollar
     amount of commissions paid during the fiscal year by the total number of
     shares purchased and sold during the fiscal year for which commissions were
     charged. For fiscal years beginning on or after September 1, 1995, a
     Portfolio is required to disclose its average commission rate per share for
     security trades on which commissions were charged.


                       See notes to financial statements

                                      16

<PAGE>
 
Special Investment Portfolio as of June 30, 1997

NOTES TO FINANCIAL STATEMENTS (Unaudited)


1 Significant Accounting Policies
  ------------------------------------------------------------------------------
  Special Investment Portfolio (the Portfolio) is registered under the
  Investment Company Act of 1940 as a diversified open-end investment company
  which was organized as a trust under the laws of the State of New York on May
  1, 1992. The Declaration of Trust permits the Trustees to issue interests in
  the Portfolio. The following is a summary of significant accounting policies
  of the Portfolio. The policies are in conformity with generally accepted
  accounting principles.

  A Security Valuations -- Securities listed on foreign or U.S. securities
  exchanges or in the NASDAQ National Market System generally are valued at
  closing sales prices or, if there were no sales, at the mean between the
  closing bid and asked prices therefor on the exchange where such securities
  are principally traded or on such National Market System. Unlisted or listed
  securities for which closing sales prices are not available are valued at the
  mean between the latest available bid and asked prices on the principal market
  where the security was traded. An option is valued at the last sale price as
  quoted on the principal exchange or board of trade on which such option or
  contract is traded or, in the absence of a sale, at the mean between the last
  bid and asked prices. Futures positions on securities or currencies are
  generally valued at closing settlement prices. Short-term debt securities with
  a remaining maturity of 60 days or less are valued at amortized cost. If
  securities were acquired with a remaining maturity of more than 60 days, their
  amortized cost value will be based on their value on the sixty-first day prior
  to maturity. Other fixed income and debt securities, including listed
  securities and securities for which price quotations are available, will
  normally be valued on the basis of valuations furnished by a pricing service.
  Securities for which market quotations are unavailable, including any security
  the disposition of which is restricted under the Securities Act of 1933, and
  other assets will be appraised at their fair market value as determined in
  good faith by or at the direction of the Trustees of the Portfolio.

  B Income Taxes -- The Portfolio is treated as a partnership for federal tax
  purposes. No provision is made by the Portfolio for federal or state taxes on
  any taxable income of the Portfolio because each investor in the Portfolio is
  ultimately responsible for the payment of any taxes. Since some of the
  Portfolio's investors are regulated investment companies that invest all or
  substantially all of their assets in the Portfolio, the Portfolio normally
  must satisfy the applicable source of income and diversification requirements
  (under the Code) in order for its investors to satisfy them. The Portfolio
  will allocate at least annually among its investors each investor's
  distributive share of the Portfolio's net investment income, net realized
  capital gains, and any other items of income, gain, loss, deduction or credit.

  C Expense Reduction -- Investors Bank & Trust Company (IBT) serves as
  custodian of the Portfolio. Pursuant to the custodian agreement, IBT receives
  a fee reduced by credits which are determined based on the average daily cash
  balances the Portfolio maintains with IBT. All significant credit balances
  used to reduce the Portfolio's custodian fees are reported as a reduction of
  expenses on the Statement of Operations.

  D Other -- Investment transactions are accounted for on the date the
  investments are purchased and sold. Dividend income is recorded on ex-dividend
  date. Realized gains and losses on the sale of investments are determined on
  the identified cost basis.

  E Deferred Organization Expenses -- Costs incurred by the Portfolio in
  connection with its organization, including registration costs, are being
  amortized on the straight-line basis over five years.

  F Use of Estimates -- The preparation of the financial statements in
  conformity with generally accepted accounting principles requires management
  to make estimates and assumptions that affect the reported amounts of assets
  and liabilities at the date of the financial statements and the reported
  amounts of income and expense during the reporting period. Actual results
  could differ from those estimates.

2 Investment Transactions
  ------------------------------------------------------------------------------
  Purchases and sales of investments, other than short-term obligations,
  aggregated $76,640,196 and $74,324,273, respectively.

3 Investment Adviser Fee and Other Transactions with Affiliates
  ------------------------------------------------------------------------------
  The investment adviser fee is earned by Boston Management and Research (BMR),
  a wholly-owned subsidiary of Eaton Vance Management (EVM), as compensation for
  management and investment advisory services rendered to the Portfolio. The fee
  is at the annual

                                      17
<PAGE>
 
Special Investment Portfolio  as of June 30, 1997

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D



  rate of 5/8 of 1% of average daily net assets. For the six months ended
  June 30, 1997, the fee was equivalent to 0.625% (annualized) of the
  Portfolio's average net assets for such period and amounted to $237,360.
  Except as to Trustees of the Portfolio who are not members of EVM's or
  BMR's organization, officers and Trustees receive remuneration for their
  services to the Portfolio out of such investment adviser fee. Certain of
  the officers and Trustees of the Portfolio are officers and
  directors/trustees of the above organizations. Trustees of the Portfolio
  that are not affiliated with the Investment Adviser may elect to defer
  receipt of all or a percentage of their annual fees in accordance with the
  terms of the Trustees Deferred Compensation Plan. For the period ended June
  30, 1997, no significant amounts have been deferred.


4 Line of Credit
  ------------------------------------------------------------------------------
  The Portfolio participates with other portfolios and funds managed by BMR
  and EVM and its affiliates in a committed $120 million unsecured line of
  credit agreement with a group of banks. The Portfolio may temporarily borrow
  from the line of credit to satisfy redemption requests or settle investment
  transactions. Interest is charged to each portfolio or fund based on its
  borrowings at an amount above the bank's adjusted certificate of deposit
  rate, Eurodollar rate or federal funds rate. In addition, a fee computed at
  an annual rate of 0.15% on the daily unused portion of the line of credit is
  allocated among the participating Portfolios and funds at the end of each
  quarter. The Portfolio did not have any significant borrowings or allocated
  fees during the period.


5 Federal Income Tax Basis of Investments
  ------------------------------------------------------------------------------
  The cost and unrealized appreciation/depreciation in value of the
  investments owned at June 30, 1997, as computed on a federal income tax
  basis, were as follows:
<TABLE> 
  <S>                                                  <C> 
  Aggregate cost                                       $67,617,374
  ------------------------------------------------------------------------------
  Gross unrealized appreciation                        $15,042,798
  
  Gross unrealized depreciation                          1,630,579
  ------------------------------------------------------------------------------
  Net unrealized appreciation                          $13,412,219
  ------------------------------------------------------------------------------
</TABLE> 

                                       18
<PAGE>
 
EV Marathon Special Equities Fund as of June 30, 1997

INVESTMENT MANAGEMENT


EV Marathon Special Equities Fund


         Officers                      Trustees

         James B. Hawkes               M. Dozier Gardner
         President and Trustee         Vice Chairman, Eaton Vance
                                       Management
         Edward E. Smiley, Jr
         Vice President                Donald R. Dwight                        
                                       President, Dwight Partners, Inc.        
         James L. O'Connor             Chairman, Newspapers of New England, Inc.
         Treasurer                                      
                                       Samuel L. Hayes, III                     
         Alan R. Dynner                Jacob H. Schiff Professor of Investment  
         Secretary                     Banking, Harvard University Graduate 
                                       School of Business Administration    
                      
                                       Norton H. Reamer                      
                                       President and Director, United Asset  
                                       Management Corporation                
                                       
                                       John L. Thorndike                        
                                       Formerly Director, Fiduciary Company
                                       Incorporated  
                                       
                                       Jack L. Treynor                    
                                       Investment Adviser and Consultant  
                         

Special Investment Portfolio


         Officers                      Trustees

         James B. Hawkes               M. Dozier Gardner          
         President and Trustee         Vice Chairman, Eaton Vance 
                                       Management                 
         Edward E. Smiley, Jr                    
         Vice President                Donald R. Dwight                         
                                       President, Dwight Partners, Inc.         
         James L. O'Connor             Chairman, Newspapers of New England, Inc.
         Treasurer                              
                                       Samuel L. Hayes, III                     
         Alan R. Dynner                Jacob H. Schiff Professor of Investment  
         Secretary                     Banking, Harvard University Graduate 
                                       School of Business Administration  
                                       
                                       Norton H. Reamer                      
                                       President and Director, United Asset  
                                       Management Corporation                
                                       
                                       John L. Thorndike                        
                                       Formerly Director, Fiduciary Company 
                                       Incorporated
                                       
                                       Jack L. Treynor                   
                                       Investment Adviser and Consultant 
                                       


                                       19






<PAGE>
 
Investment Adviser of
Special Investment Portfolio
Boston Management and Research
24 Federal Street
Boston, MA 02110


Administrator of
EV Classic Special Equities Fund
Eaton Vance Management
24 Federal Street
Boston, MA 02110


Principal Underwriter
Eaton Vance Distributors, Inc.
24 Federal Street
Boston, MA 02110
(617) 482-8260


Custodian
Investors Bank & Trust Company
200 Clarendon Street, 16th Floor
Boston, MA 02116


Transfer and Dividend Disbursing Agent
First Data Investor Services Group
Attention:  Eaton Vance Funds
P.O. Box 5123
Westborough, MA 01581-5123






EV Marathon Special Equities Fund
24 Federal Street
Boston, MA 02110





- --------------------------------------------------------------------------------
   This report must be preceded or accompanied by a current prospectus which
contains more complete information on the Fund, including its distribution plan,
sales charges and expenses. Please read the prospectus carefully before you
invest or send money.
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                                                                    M-SESRC-8/97




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