EATON VANCE SPECIAL INVESTMENT TRUST
N-30D, 1997-09-05
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<PAGE>
 
[EV LOGO APPEARS HERE]

Investing for the 21st Century


                               [PHOTO OF OUTSIDE OF STOCK EXCHANGE APPEARS HERE]


    Semiannual Report June 30, 1997




                                      EV

       [PHOTO OF STOCK EXCHANGE    MARATHON
        FLAG APPEARS HERE]
                                  STOCK FUND



                                  Eaton Vance
                     Global Management-Global Distribution





               [PHOTO OF WALL STREET TRADING FLOOR APPEARS HERE]


                                                                        Marathon


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

- --------------------------------------------------------------------------------
INVESTMENT UPDATE
- --------------------------------------------------------------------------------

[PHOTOGRAPH OF DUNCAN W. RICHARDSON APPEARS HERE]

Duncan W. Richardson,
Portfolio Manager

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, falling to 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, 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.*

 . Despite ever-higher stock prices, the market forces propelling the surge
  within the large-capitalization sector remain intact. Low worldwide inflation,
  the spread of capitalism around the world, and increasing productivity have
  benefited U.S. multinational companies, whose profits have continued to rise.

- --------------------------------------------------------------------------------
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 Stock Fund had a total
  return of 17.1%./1/

 . This return resulted from an increase in net asset value to $16.02 per share
  on June 30, 1997 from $13.90 per share on December 31, 1996, and the
  reinvestment of $0.03 per share in income dividends and $0.20 per share in
  capital gains distributions./2/

 . By comparison, the average total return for mutual funds in the Lipper Growth
  & Income Fund Category was 15.5% during this period.*
  
  Management Discussion

 . As the equity markets became more volatile during the past six months, we
  found opportunities to add to holdings with strong growth characteristics.
  Some examples during this period include Home Depot, Marsh & McLennan, and
  Boeing.

 . We are always on the lookout for ways to add yield to the Fund and found such
  an opportunity in real estate investment trusts (REITs). After trimming back
  in this sector early in the year, we increased our REIT holdings when prices
  subsequently declined. We also found yield opportunities in a few of the
  regional bell operating companies.

 . The Fund's tremendous diversity across sectors and individual holdings served
  to mitigate the impact of the April market downturn. Our goal is to continue
  to maintain as diverse a portfolio as possible.

- --------------------------------------------------------------------------------
/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 27.6% 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

<TABLE> 
<CAPTION> 

Average Annual Total Returns/2/
- ---------------------------------------------
<S>                                  <C> 
One Year                             29.3%
Life of Fund (8/17/94)               21.2

<CAPTION> 

SEC Average Annual Total Returns/2/
- ---------------------------------------------
<S>                                  <C> 
One Year                             24.3%
Life of Fund (8/17/94)               20.2

</TABLE> 


<TABLE> 
<CAPTION> 

Five Largest Industry Sectors/3/
- ---------------------------------------------
As a percentage of total net assets
<S>                                  <C> 
Financial                            24.9%
Consumer Non-Durables                24.1%
Consumer Services                    13.4%
Basic Industries                     12.2%
Business Products & Services          8.0%
</TABLE> 

[BAR CHART APPEARS HERE]

<TABLE> 
<CAPTION> 

Ten Largest Equity Holdings/3/
- ---------------------------------------------
As a percentage of total net assets
<S>                                    <C> 
Unilever N.V.                          3.0%
Home Depot, Inc.                       3.0
Freeport McMoran Corp.                 3.0
CVS Corp.                              3.0
Monsanto Company                       2.8
Allstate Corp.                         2.6
Marsh & McLennan Companies             2.6
McGraw-Hill Companies                  2.6
Eli Lilly & Co.                        2.5
Federal National Mortgage Association  2.5

</TABLE> 

                                        2
<PAGE>
 
EV Marathon Stock 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 Stock Portfolio, at value (Note 1A)
    (identified cost, $12,971,199)                                 $ 15,382,318
Receivable for Fund shares sold                                          42,540
Receivable from Administrator (Note 4)                                   17,500
Deferred organization expenses (Note 1E)                                 20,515
- --------------------------------------------------------------------------------
Total assets                                                       $ 15,462,873
- --------------------------------------------------------------------------------
                                                                   
                                                                   
Liabilities                                                        
- --------------------------------------------------------------------------------
Payable for Fund shares redeemed                                   $     33,885
Payable to affiliate for Trustees' fees (Note 4)                             61
Accrued expenses                                                         13,285
- --------------------------------------------------------------------------------
Total liabilities                                                  $     47,231
- --------------------------------------------------------------------------------
Net Assets for 962,402 shares of beneficial interest               
    outstanding                                                    $ 15,415,642
- --------------------------------------------------------------------------------
                                                                   
                                                                   
Sources of Net Assets                                              
- --------------------------------------------------------------------------------
Paid-in capital                                                    $ 11,430,023
Accumulated net realized gain on                                   
    investments (computed on the basis of identified cost)            1,580,951
Distributions in excess of net investment income                         (6,451)
Net unrealized appreciation of investments (computed               
    on the basis of identified cost)                                  2,411,119
- --------------------------------------------------------------------------------
Total                                                              $ 15,415,642
- --------------------------------------------------------------------------------
                                                                   
                                                                   
Net Asset Value, Offering and Redemption                           
Price Per Share (Note 6)                                           
- --------------------------------------------------------------------------------
($15,415,642 / 962,402 shares of beneficial interest               
    outstanding)                                                   $      16.02
- --------------------------------------------------------------------------------
</TABLE> 
                                                                   
                                                                   
Statement of Operations                                            

<TABLE> 
<CAPTION> 
For the Six Months Ended                                           
June 30, 1997                                                      
Investment Income (Note 1B)                                        
- --------------------------------------------------------------------------------
<S>                                                                <C> 
Dividend income allocated from                                     
    Portfolio (net of withholding taxes, $143)                     $    135,790
Interest income allocated from Portfolio                                 22,508
Expenses allocated from Portfolio                                       (49,541)
- --------------------------------------------------------------------------------
Total investment income from Portfolio                             $    108,757
- --------------------------------------------------------------------------------
                                                                   
                                                                   
Expenses                                                           
- --------------------------------------------------------------------------------
Distribution and service fees (Note 5)                             $     68,515
Registration fees                                                        11,829
Printing and postage                                                     10,543
Transfer and dividend disbursing agent fees                               7,835
Legal and accounting services                                             6,221
Amortization of organization expenses (Note 1E)                           4,525
Custodian fee                                                             1,250
Miscellaneous                                                               351
- --------------------------------------------------------------------------------

Total expenses                                                     $    111,069
- --------------------------------------------------------------------------------
                                                                   
Deduct --                                                          
    Preliminary allocation of expenses to the                      
        Administrator (Note 4)                                     $     17,500 
- --------------------------------------------------------------------------------
Total expense reductions                                           $     17,500
- --------------------------------------------------------------------------------
                                                                   
Net expenses                                                       $     93,569
- --------------------------------------------------------------------------------
                                                                   
Net investment income                                              $     15,188
- --------------------------------------------------------------------------------
                                                                   
                                                                   
Realized and Unrealized                                            
Gain (Loss) from Portfolio                                         
- --------------------------------------------------------------------------------
Net realized gain --                                               
    Investment transactions (identified cost basis)                $  1,565,525
    Options                                                               6,329
- --------------------------------------------------------------------------------
Net realized gain on investment transactions                       $  1,571,854
- --------------------------------------------------------------------------------
Change in unrealized appreciation --                               
    Investment transactions                                        $    564,595
    Options                                                              19,523
- --------------------------------------------------------------------------------
Net change in unrealized appreciation of investments               $    584,118
- --------------------------------------------------------------------------------
                                                                   
Net realized and unrealized gain on investments                    $  2,155,972
- --------------------------------------------------------------------------------

Net increase in net assets resulting from operations               $  2,171,160
- --------------------------------------------------------------------------------
</TABLE> 

                       See notes to financial statements

                                       3

<PAGE>
 
EV Marathon Stock 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 income                    $     15,188        $     56,330
    Net realized gain on                                          
        investments                             1,571,854             638,639
    Net change in unrealized                                      
        appreciation of                                           
        investments                               584,118           1,094,269
- --------------------------------------------------------------------------------
Net increase in net assets from operations   $  2,171,160        $  1,789,238
- --------------------------------------------------------------------------------
Distributions to shareholders --                                  
    From net investment income               $    (20,784)       $    (57,661)
    In excess of net investment income             (6,451)                 --
    From net realized gain on investments        (187,276)           (444,768)
- --------------------------------------------------------------------------------
Total distributions to shareholders          $   (214,511)       $   (502,429)
- --------------------------------------------------------------------------------
Transactions in shares of beneficial                              
    interest (Note 3) --                                         
    Proceeds from sale of shares             $  2,514,113        $  6,401,841
    Net asset value of shares issued to                           
        shareholders in payment of                                
        distributions declared                    246,210             378,659
    Cost of shares redeemed                    (1,444,298)         (3,260,520)
- --------------------------------------------------------------------------------
Net increase in net assets from                                   
    Fund share transactions                  $  1,316,025        $  3,519,980
- --------------------------------------------------------------------------------
                                                                  
Net increase in net assets                   $  3,272,674        $  4,806,789
- --------------------------------------------------------------------------------
                                                                  
                                                                  
Net Assets                                                        
- --------------------------------------------------------------------------------
At beginning of period                       $ 12,142,968        $  7,336,179
- --------------------------------------------------------------------------------
At end of period                             $ 15,415,642        $ 12,142,968
- --------------------------------------------------------------------------------


Accumulated undistributed
(distributions in excess of)
net investment income
included in net assets
- --------------------------------------------------------------------------------
At end of period                             $     (6,451)       $      5,596
- --------------------------------------------------------------------------------
</TABLE> 

                       See notes to financial statements

                                       4


<PAGE>
 
EV Marathon Stock 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             $13.900      $12.250       $ 9.610      $10.000
- -----------------------------------------------------------------------------------------------------


Income (loss) from operations
- -----------------------------------------------------------------------------------------------------
Net investment income (loss)                       $ 0.017      $ 0.075       $ 0.060      $(0.010)
Net realized and unrealized gain (loss) 
 on investments                                      2.333        2.187         2.815       (0.380)
- -----------------------------------------------------------------------------------------------------
Total income (loss) from operations                $ 2.350      $ 2.262       $ 2.875      $(0.390)
- -----------------------------------------------------------------------------------------------------


Less distributions
- -----------------------------------------------------------------------------------------------------
From net investment income                         $(0.023)     $(0.080)      $(0.036)     $    --
In excess of net investment income                  (0.007)          --            --           --
From net realized gain on investments               (0.200)      (0.532)       (0.199)          --
- -----------------------------------------------------------------------------------------------------
Total distributions                                $(0.230)     $(0.612)      $(0.235)     $    --
- -----------------------------------------------------------------------------------------------------

Net asset value -- End of period                   $16.020      $13.900       $12.250      $ 9.610
- -----------------------------------------------------------------------------------------------------

Total Return/(1)/                                    17.12%       18.71%        29.98%       (3.90)%
- -----------------------------------------------------------------------------------------------------


Ratios/Supplemental Data+
- -----------------------------------------------------------------------------------------------------
Net assets, end of period (000 omitted)            $15,416      $12,143       $ 7,336      $ 1,066
Ratio of net expenses to average daily 
 net assets /(2)/                                     2.09%        2.09%         2.32%        3.25%+
Ratio of net investment income(loss) to average 
 daily net assets                                     0.22%        0.57%         0.71%       (0.74)%+
</TABLE> 
+   The operating expenses of the Fund and the Portfolio reflect an allocation
    of expenses to the Administrator. Had such action 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)/                                    2.34%        2.33%         3.66%        3.81%+
    Net investment income (loss)                     (0.03)%       0.33%        (0.63)%      (0.18)%+
Net investment income (loss) per share             $(0.002)     $ 0.018       $(0.022)     $(0.016)
- -----------------------------------------------------------------------------------------------------
</TABLE> 
+     Annualized.
*     For the period from the start of business, August 17, 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 the Portfolio's allocated expense.

                       See notes to financial statements

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

NOTES TO FINANCIAL STATEMENTS (Unaudited)


1 Significant Accounting Policies
  ------------------------------------------------------------------------------
  EV Marathon Stock 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 Stock 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 (11.2% 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 the 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 are
  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, options 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 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.

  H Interim Financial Information -- The interim financial statements relating
  to June 30, 1997 and for the six month period then ended have not been audited
  by independent certified public accountants, but in the opinion of the Fund's
  management, reflect all adjustments, consisting only of normal recurring
  adjustments, necessary for the fair presentation of the financial statements.


2 Distributions to Shareholders
  ------------------------------------------------------------------------------
  The Fund's present policy is to pay quarterly dividends from 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 requires 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 Stock 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 (with no par value).
  Transactions in Fund shares were as follows:

<TABLE> 
<CAPTION> 
                                          Six Months Ended
                                          June 30, 1997       Year Ended      
                                          (Unaudited)         December 31, 1996
  -------------------------------------------------------------------------------
   <S>                                    <C>                 <C>
   Sales                                           169,412              502,161
  
   Issued to shareholders electing to
     receive payments of distributions in 
     Fund shares                                    17,595               28,362
  
   Redemptions                                     (98,370)            (255,733)
  -------------------------------------------------------------------------------
  
   Net increase                                     88,637              274,790
  -------------------------------------------------------------------------------
</TABLE> 

4 Investment Adviser Fee and Other Transactions with Affiliates
  ------------------------------------------------------------------------------
  Eaton Vance serves only as the administrator of the Fund, but receives no
  compensation. To enhance the net income of the Fund $17,500 of the Funds'
  expenses were allocated, on a preliminary basis, to EV for the six months
  ended June 30, 1997. The Portfolio has engaged Boston Management and Research
  (BMR), a subsidiary of Eaton Vance Management (EVM), to render investment
  advisory services. See Note 3 of the Portfolio's Notes to Financial Statements
  which are included elsewhere in this report. Except as to Trustees of the Fund
  and the Portfolio who are not members of EVM's or BMR's organization, officers
  and Trustees receive remuneration for their services to the Fund out of such
  investment adviser fee.

  Certain of the officers and Trustees of the Fund and Portfolio are officers
  and 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 pay
  the principal underwriter, Eaton Vance Distributors, Inc. (EVD) amounts equal
  to 1/365 of 0.75% of the Fund's daily net assets, for providing ongoing
  distribution services and facilities to the Fund. The Fund will automatically
  discontinue payments 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 increase 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 $51,295 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 of
  EVD calculated under the Plan was approximately $330,000.

  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 of the fund 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 any 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 $17,220 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 when
  there are no outstanding Uncovered Distribution Charges of EVD.

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


6 Contingent Deferred Sales Charge (CDSC)
  ------------------------------------------------------------------------------
  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

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

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D

  the net asset value at date of redemption or date of purchase. No charge is
  levied on shares acquired by 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 $15,000 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
  $2,581,241 and $1,680,952, respectively.

                                       8
<PAGE>
 
Stock Portfolio as of June 30, 1997

PORTFOLIO OF INVESTMENTS (Unaudited)


Common Stocks -- 91.1%
<TABLE>
<CAPTION>
Security                                              Shares       Value
- --------------------------------------------------------------------------------
<S>                                             <C>                <C>        
Advertising -- 0.5%
- --------------------------------------------------------------------------------
Omnicom Group, Inc.                                   10,000       $   616,250
- --------------------------------------------------------------------------------
                                                                   $   616,250
- --------------------------------------------------------------------------------

Aerospace and Defense -- 2.4%                 
- --------------------------------------------------------------------------------
Boeing Co.                                            62,000       $ 3,289,875
- --------------------------------------------------------------------------------
                                                                   $ 3,289,875
- --------------------------------------------------------------------------------

Auto and Parts -- 0.4%                        
- --------------------------------------------------------------------------------
Magna International Class A                           10,000       $   601,875
- --------------------------------------------------------------------------------
                                                                   $   601,875
- --------------------------------------------------------------------------------

Banks - Regional -- 1.6%                      
- --------------------------------------------------------------------------------
BankBoston Corp.                                      15,000       $ 1,080,938
Fleet Financial Group, Inc.                           18,000         1,138,500
- --------------------------------------------------------------------------------
                                                                   $ 2,219,438
- --------------------------------------------------------------------------------
                                              
Banks and Money Centers -- 2.2%               
- --------------------------------------------------------------------------------
Bankers Trust New York Corp.                          35,000       $ 3,045,000
- --------------------------------------------------------------------------------
                                                                   $ 3,045,000
- --------------------------------------------------------------------------------

Banks and Money Services -- 2.5%              
- --------------------------------------------------------------------------------
Citicorp                                              28,332       $ 3,415,777
- --------------------------------------------------------------------------------
                                                                   $ 3,415,777
- --------------------------------------------------------------------------------

Beverages -- 0.7%                             
- --------------------------------------------------------------------------------
PepsiCo, Inc.                                         25,000       $   939,063
- --------------------------------------------------------------------------------
                                                                   $   939,063
- --------------------------------------------------------------------------------

Broadcasting and Cable -- 0.4%                
- --------------------------------------------------------------------------------
Comcast Corp. Class A                                 25,000       $   534,375
- --------------------------------------------------------------------------------
                                                                   $   534,375
- --------------------------------------------------------------------------------

Chemicals -- 2.8%                             
- --------------------------------------------------------------------------------
Monsanto Corp.                                        90,000       $ 3,875,625
- --------------------------------------------------------------------------------
                                                                   $ 3,875,625
- --------------------------------------------------------------------------------

Communications Equipment -- 1.6%              
- --------------------------------------------------------------------------------
Nokia Corp., ADR                                      30,000       $ 2,212,500
- --------------------------------------------------------------------------------
                                                                   $ 2,212,500
- --------------------------------------------------------------------------------

Containers and Packaging -- 2.3%              
- --------------------------------------------------------------------------------
Crown Cork & Seal, Inc.                               60,000       $ 3,206,250
- --------------------------------------------------------------------------------
                                                                   $ 3,206,250
- --------------------------------------------------------------------------------

Drugs -- 8.0%                                 
- --------------------------------------------------------------------------------
Elan Corp., PLC ADR                                   65,000       $ 2,941,250
Genzyme Corp. Class A                                 35,000           969,063
Lilly & Co.                                           32,000         3,498,000
Pfizer, Inc.                                          10,000         1,195,000
Warner-Lambert Co.                                    20,000         2,485,000
- --------------------------------------------------------------------------------
                                                                   $11,088,313
- --------------------------------------------------------------------------------

Electric Utilities -- 0.0%                    
- --------------------------------------------------------------------------------
Electric De Portugal ADR                                 400       $    14,400
- --------------------------------------------------------------------------------
                                                                   $    14,400
- --------------------------------------------------------------------------------

Electronics - Semiconductors -- 1.0%          
- --------------------------------------------------------------------------------
Intel Corp.                                           10,000       $ 1,418,125
- --------------------------------------------------------------------------------
                                                                   $ 1,418,125
- --------------------------------------------------------------------------------

Financial - Miscellaneous -- 3.2%             
- --------------------------------------------------------------------------------
Federal National Mortgage Association                 80,000       $ 3,490,000
MGIC Investment Corp.                                 20,000           958,750
- --------------------------------------------------------------------------------
                                                                   $ 4,448,750
- --------------------------------------------------------------------------------

Foods -- 7.0%                                 
- --------------------------------------------------------------------------------
Conagra Inc.                                          27,000       $ 1,731,375
Dean Foods Co.                                        75,000         3,028,125
McCormick & Co., Inc.                                 30,000           759,375
Unilever ADR                                          19,000         4,141,999
- --------------------------------------------------------------------------------
                                                                   $ 9,660,874
- --------------------------------------------------------------------------------
</TABLE>
                                              
                                        
                       See notes to financial statements

                                       9
<PAGE>
 
Stock Portfolio as of June 30, 1997

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D

<TABLE>
<CAPTION>

Security                                              Shares       Value
- --------------------------------------------------------------------------------
<S>                                                   <C>          <C>        
Household Products -- 2.5%
- --------------------------------------------------------------------------------
Gillette Co.                                          15,640       $ 1,481,890
Newell Co.                                            50,000         1,981,250
- --------------------------------------------------------------------------------
                                                                   $ 3,463,140
- --------------------------------------------------------------------------------

Information Services -- 3.8%
- --------------------------------------------------------------------------------
Automatic Data Processing, Inc.                       30,000       $ 1,410,000
Reuters Holdings PLC ADR                              60,000         3,781,872
- --------------------------------------------------------------------------------
                                                                   $ 5,191,872
- --------------------------------------------------------------------------------

Insurance -- 10.9%
- --------------------------------------------------------------------------------
Allstate Corp.                                        49,540       $ 3,616,420
American International  Group, Inc.                   18,000         2,688,750
Lincoln National Corp.                                25,000         1,609,375
Marsh & McLennan Cos.,  Inc.                          50,000         3,568,750
Nationwide Financial Service                          17,000           451,563
Progressive Corp.                                     35,000         3,045,000
- --------------------------------------------------------------------------------
                                                                   $14,979,858
- --------------------------------------------------------------------------------

Leisure Equipment -- 0.4%
- --------------------------------------------------------------------------------
Sturm, Ruger & Co., Inc.                              30,000       $   588,750
- --------------------------------------------------------------------------------
                                                                   $   588,750
- --------------------------------------------------------------------------------

Lodging and Gaming -- 2.7%
- --------------------------------------------------------------------------------
MGM Grand, Inc.                                       30,000       $ 1,110,000
Mirage Resorts, Inc.                                  35,000           883,750
Promus Hotel Corp.                                    45,000         1,743,750
- --------------------------------------------------------------------------------
                                                                   $ 3,737,500
- --------------------------------------------------------------------------------

Manufacturing -- 1.6%
- --------------------------------------------------------------------------------
Corning, Inc.                                         40,000       $ 2,225,000
- --------------------------------------------------------------------------------
                                                                   $ 2,225,000
- --------------------------------------------------------------------------------

Medical Products -- 3.6%
- --------------------------------------------------------------------------------
Baxter International, Inc.                            65,000       $ 3,396,250
Johnson & Johnson Co.                                 25,000         1,609,375
- --------------------------------------------------------------------------------
                                                                   $ 5,005,625
- --------------------------------------------------------------------------------

Metals and Minerals -- 1.1%
- --------------------------------------------------------------------------------
J & L Specialty Steel, Inc.                          120,000       $ 1,440,000
- --------------------------------------------------------------------------------
                                                                   $ 1,440,000
- --------------------------------------------------------------------------------

Oil and Gas - Exploration and Production -- 5.2%
- --------------------------------------------------------------------------------
Anadarko Petroleum Corp.                              20,000       $ 1,200,000
British Petroleum, PLC ADR                            30,000         2,246,250
Triton Energy Ltd.                                    60,000         2,748,750
USX-Marathon Group                                    35,000         1,010,625
- --------------------------------------------------------------------------------
                                                                   $ 7,205,625
- --------------------------------------------------------------------------------

Paper and Forest Products -- 0.3%
- --------------------------------------------------------------------------------
Rayonier, Inc.                                        10,000       $   420,625
- --------------------------------------------------------------------------------
                                                                   $   420,625
- --------------------------------------------------------------------------------

Photography -- 1.7%
- --------------------------------------------------------------------------------
Eastman Kodak Co.                                     30,000       $ 2,302,500
- --------------------------------------------------------------------------------
                                                                   $ 2,302,500
- --------------------------------------------------------------------------------

Publishing -- 4.3%
- --------------------------------------------------------------------------------
Dow Jones & Co., Inc.                                 60,000       $ 2,411,250
McGraw-Hill, Inc.                                     60,000         3,528,750
- --------------------------------------------------------------------------------
                                                                   $ 5,940,000
- --------------------------------------------------------------------------------

REITS -- 3.1%
- --------------------------------------------------------------------------------
Beacon Properties Corp.                               20,000       $   667,500
Chateau Communities, Inc.                             10,000           286,250
Equity Residential Properties Trust                   10,000           475,000
Highwood Properties, Inc.                             20,000           640,000
Nationwide Health Properties, Inc.                     2,000            44,000
Post Properties, Inc.                                 13,000           527,313
Storage USA, Inc.                                     15,000           573,750
Sun Communities, Inc.                                 20,000           671,250
Trinet Corporate Realty Trust, Inc.                   10,000           330,625
- --------------------------------------------------------------------------------
                                                                   $ 4,215,688
- --------------------------------------------------------------------------------

Retail - Food and Drug -- 3.0%
- --------------------------------------------------------------------------------
CVS Corp.                                             80,000       $ 4,100,000
- --------------------------------------------------------------------------------
                                                                   $ 4,100,000
- --------------------------------------------------------------------------------
</TABLE>

                        See notes to financial statements

                                       10
<PAGE>
 
Stock Portfolio as of June 30, 1997

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D
                                                              
<TABLE>
<CAPTION>
Security                                              Shares             Value
- --------------------------------------------------------------------------------
<S>                                             <C>               <C>        
Retail - Specialty and Apparel -- 5.1%
- --------------------------------------------------------------------------------
Office Depot                                         150,000      $  2,915,625
The Home Depot, Inc.                                  60,000         4,136,249
- --------------------------------------------------------------------------------
                                                                  $  7,051,874
- --------------------------------------------------------------------------------

Specialty Chemicals and Materials -- 3.5%                           
- --------------------------------------------------------------------------------
Ecolab, Inc.                                          50,000      $  2,387,500
Potash Corp. of Saskatchewan                          32,000         2,402,000
- --------------------------------------------------------------------------------
                                                                  $  4,789,500
- --------------------------------------------------------------------------------
                                                                    
Telephone Utilities -- 1.7%                                         
- --------------------------------------------------------------------------------
GTE Corp.                                             25,000      $  1,096,875
SBC Communications, Inc.                              20,000         1,237,500
- --------------------------------------------------------------------------------
                                                                  $  2,334,375
- --------------------------------------------------------------------------------

Total Common Stocks                                                 
   (identified cost, $95,655,812)                                 $125,578,422
- --------------------------------------------------------------------------------
</TABLE> 

Convertible Preferred Stocks -- 4.2%
<TABLE> 
<CAPTION>
Security                                              Shares             Value
- --------------------------------------------------------------------------------
<S>                                             <C>               <C>        
Insurance -- 0.8%
- --------------------------------------------------------------------------------
Sun America, Inc., 3.188%                             25,000      $  1,090,625
- --------------------------------------------------------------------------------
                                                                  $  1,090,625
- --------------------------------------------------------------------------------

Metals - Gold -- 3.0%                                                
- --------------------------------------------------------------------------------
Freeport McMoRan Copper & Gold, 5%                   150,000      $  4,106,249
- --------------------------------------------------------------------------------
                                                                  $  4,106,249
- --------------------------------------------------------------------------------

Natural Gas Utilities -- 0.4%                                        
- --------------------------------------------------------------------------------
Tejas Gas Corp., 5.25%                                10,000      $    530,000
- --------------------------------------------------------------------------------
                                                                  $    530,000
- --------------------------------------------------------------------------------

Total Convertible Preferred Stocks                                   
   (identified cost, $4,736,811)                                  $  5,726,874
- --------------------------------------------------------------------------------
</TABLE> 
                                                                    
Convertible Bonds -- 3.1%
<TABLE> 
<CAPTION>
                                             Principal
                                             Amount
Security                                     (000's Omitted)             Value
- --------------------------------------------------------------------------------
<S>                                          <C>                  <C>     
INCO Ltd., 5.75%, 7/1/04                        $      2,920      $  3,460,200
Scandinavian Broadcasting System,                          
   7.25%, 8/1/05                                         840           843,150 
- --------------------------------------------------------------------------------
                                                                    
Total Convertible Bonds                                             
   (identified cost, $4,054,999)                                  $  4,303,350 
- --------------------------------------------------------------------------------
</TABLE> 

Corporate Bonds -- 0.0%                                             
<TABLE> 
<CAPTION>
                                             Principal
                                             Amount
Security                                     (000's Omitted)             Value
- --------------------------------------------------------------------------------
<S>                                          <C>                  <C>        
H. P. Hood & Son, 7.50%,  2/1/01                $         50      $     39,400
- --------------------------------------------------------------------------------
                                                                    
Total Corporate Bonds                                               
   (identified cost, $50,000)                                     $     39,400 
- --------------------------------------------------------------------------------
</TABLE> 
                                                                    
Commercial Paper -- 2.7%                                            
<TABLE> 
<CAPTION>
                                             Principal
                                             Amount
Security                                     (000's Omitted)             Value
- --------------------------------------------------------------------------------
<S>                                          <C>                  <C>        
Cut Group, 6.25%, 7/1/97                        $      3,718      $  3,718,000
- --------------------------------------------------------------------------------
                                                                   
Total Commercial Paper
   (amortized cost, $3,718,000)                                   $  3,718,000
- --------------------------------------------------------------------------------

Total Investments -- 101.1%
   (identified cost, $108,215,622)                                $139,366,046
- --------------------------------------------------------------------------------

Other Assets, Less Liabilities -- (1.1)%                          $ (1,523,404)
- --------------------------------------------------------------------------------



Net Assets -- 100%                                                $137,842,642
- --------------------------------------------------------------------------------
</TABLE> 

ADR -- American Depositary Receipt
REIT -- Real Estate Investment Trust




                       See notes to financial statements

                                       11
<PAGE>
 
Stock 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, $108,215,622)                                $139,366,046
Cash                                                                       649
Receivable for investments sold                                      2,550,169
Dividends and interest receivable                                      282,555
Tax reclaim receivable                                                  21,656
Deferred organization expenses (Note 1D)                                 6,832
- --------------------------------------------------------------------------------
Total assets                                                      $142,227,907
- --------------------------------------------------------------------------------

                                                               
Liabilities                                                    
- --------------------------------------------------------------------------------
Payable for investments purchased                                 $  4,366,855
Payable to affiliate - Director's fees (Note 3)                          2,200
Accrued expenses                                                        16,210
- --------------------------------------------------------------------------------
Total liabilities                                                 $  4,385,265
- --------------------------------------------------------------------------------
Net Assets applicable to investors' interest in Portfolio         $137,842,642
- --------------------------------------------------------------------------------

                                                               
Sources of Net Assets                                          
- --------------------------------------------------------------------------------
Net proceeds from capital contributions and withdrawals           $106,692,218
Net unrealized appreciation of investments (computed on the 
   basis of identified cost)                                        31,150,424
- --------------------------------------------------------------------------------
Total                                                             $137,842,642
- --------------------------------------------------------------------------------
</TABLE> 
                                                               
Statement of Operations                                        

<TABLE> 
<CAPTION>                                                                
For the Six Months Ended                                       
June 30, 1997                                                  
Investment Income                                              
- --------------------------------------------------------------------------------
<S>                                                               <C>   
Dividends (net of withholding taxes, $1,354)                      $  1,266,005
Interest income                                                        210,500
- --------------------------------------------------------------------------------
Total income                                                      $  1,476,505
- --------------------------------------------------------------------------------


Expenses                                                       
- --------------------------------------------------------------------------------
Investment adviser fee (Note 3)                                   $    401,714
Compensation of Trustees not members of the                    
   Investment Adviser's organization (Note 3)                            4,585
Custodian fee                                                           39,660
Legal and accounting services                                           11,901
Amortization of organization expenses (Note 1D)                          1,629
Miscellaneous                                                            1,930
- --------------------------------------------------------------------------------
Total expenses                                                    $    461,419
- --------------------------------------------------------------------------------

Net investment income                                             $  1,015,086
- --------------------------------------------------------------------------------
                                                               
                                                               
Realized and Unrealized                                        
Gain (Loss) on Investments                                     
- --------------------------------------------------------------------------------
Net realized gain --                                           
   Investment transactions (identified cost basis)                $ 14,675,802
   Options                                                              61,335
- --------------------------------------------------------------------------------
Net realized gain on investments                                  $ 14,737,137
- --------------------------------------------------------------------------------
Change in unrealized appreciation --                           
   Investments (identified cost basis)                            $  5,344,944
   Options                                                             181,789
- --------------------------------------------------------------------------------
Net change in unrealized appreciation                             $  5,526,733
- --------------------------------------------------------------------------------
                                                               
Net realized and unrealized gain on investments                   $ 20,263,870
- --------------------------------------------------------------------------------
                                                               
Net increase in net assets resulting from operations              $ 21,278,956
- --------------------------------------------------------------------------------
</TABLE>

                                                               
                       See notes to financial statements

                                      12
<PAGE>
 
Stock 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                        $  1,015,086      $  2,212,222
   Net realized gain on investments               14,737,137        14,716,162
   Net change in unrealized appreciation           5,526,733         4,346,638
- --------------------------------------------------------------------------------
Net increase in net assets from operations      $ 21,278,956      $ 21,275,022
- --------------------------------------------------------------------------------
Capital transactions --                      
   Contributions                                $  5,164,822      $  9,663,514
   Withdrawals                                   (11,564,284)      (15,692,663)
- --------------------------------------------------------------------------------
Net decrease in net assets from              
   capital transactions                         $ (6,399,462)     $ (6,029,149)
- --------------------------------------------------------------------------------

Net increase in net assets                      $ 14,879,494      $ 15,245,873
- --------------------------------------------------------------------------------
                                             

Net Assets                                   
- --------------------------------------------------------------------------------
At beginning of period                          $122,963,148      $107,717,275
- --------------------------------------------------------------------------------
At end of period                                $137,842,642      $122,963,148
- --------------------------------------------------------------------------------
</TABLE>

                       See notes to financial statements

                                       13
<PAGE>
 
Stock 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                                              0.72%+       0.73%         0.75%        0.73%+
Net investment income                                 1.59%+       1.96%         2.30%        2.45%+
                                                                                           
Portfolio Turnover                                      46%         114%          108%          28%
- -----------------------------------------------------------------------------------------------------
Average commission rate (per share)/(1)/           $0.0593      $0.0579          $ --         $ --
- -----------------------------------------------------------------------------------------------------
</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
      Fund is required to disclose its average commission rate per share for
      security trades on which commissions were charged.


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

NOTES TO FINANCIAL STATEMENTS (Unaudited)



1 Significant Accounting Policies
  ------------------------------------------------------------------------------
  Stock 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 beneficial 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 Investment Valuations -- Securities listed on foreign or U.S. securities
  exchanges or in the NASDAQ National Market System generally are valued at
  closing sale prices or, if there were no sales, at the mean between the
  closing bid and asked prices on the exchange where such securities are
  principally traded or on such National Market System. Unlisted or listed
  securities for which closing sale 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 value as determined in good faith
  by or at the direction of the Trustees of the Portfolio.
  
  B Federal 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 Internal Revenue 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 in the Statement of Operations.
  
  D Deferred Organization Expenses -- Costs incurred by the Portfolio in
  connection with its organization are being amortized on the straight-line
  basis over five years.
  
  E Other -- Investment transactions are accounted for on a trade date basis.
  
  F Written Options -- The Portfolio may write call or put options for which
  premiums are received and are recorded as liabilities, and are subsequently
  adjusted to the current value of the options written. Premiums received from
  writing options which expire are treated as realized gains. Premiums received
  from writing options which are exercised or are closed are offset against the
  proceeds or amount paid on the transaction to determine the realized gain or
  loss. If a put option is exercised, the premium reduces the cost basis of the
  securities purchased by the Portfolio. The Portfolio as a writer of an option
  may have no control over whether the underlying securities may be sold (call)
  or purchased (put) and as a result bears the market risk of an unfavorable
  change in the price of the securities underlying the written option.
  
  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 expenses during the reporting period. Actual results
  could differ from those estimates.

                                       15
<PAGE>
 
Stock Portfolio as of June 30, 1997

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D



  H Interim Financial Information -- The interim financial statements relating
  to June 30, 1997 and for the six month period then ended have not been
  audited by independent certified public accountants, but in the opinion of
  the Portfolio's management, reflect all adjustments, consisting only of
  normal recurring adjustments, necessary for the fair presentation of the
  financial statements.


2 Investments Transactions
  ------------------------------------------------------------------------------
  Purchases and sales of investments, other than short term obligations,
  aggregated $57,181,765 and $56,907,937, 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 rate of 5/8 of 1% of average daily net assets. For
  the six months ended June 30, 1997, the fee amounted to $401,714. 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 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 six months 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 $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 banks 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 six
  months ended June 30, 1997.


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                                                   $108,215,622
  ------------------------------------------------------------------------------
  Gross unrealized appreciation                                    $ 31,512,278

  Gross unrealized depreciation                                        (361,854)
  ------------------------------------------------------------------------------
  
  Net unrealized appreciation                                      $ 31,150,424
  ------------------------------------------------------------------------------
</TABLE> 


6 Financial Instruments
  ------------------------------------------------------------------------------
  The Portfolio regularly trades in financial instruments with off-balance-sheet
  risk in the normal course of its investing activities and to assist in
  managing exposure to market risks such as interest rates and foreign currency
  exchange rates. These financial instruments include written options. The
  notional or contractual amounts of these instruments represent the investment
  the Portfolio has in particular classes of financial instruments and do not
  necessarily represent the amounts potentially subject to risk. The measurement
  of the risks associated with these instruments is meaningful only when all
  related and offsetting transactions are considered. A summary of obligations
  under these financial instruments at June 30, 1997 is as follows:

<TABLE> 
<CAPTION> 
                                               Number of
                                               Contracts
                                               (000's omitted)         Premiums
  ------------------------------------------------------------------------------
  <S>                                          <C>               <C>        
  Outstanding, beginning of period                        100          $ 61,335
     
  Options expired                                        (100)         $(61,335)
  ------------------------------------------------------------------------------

  Outstanding, end of period                                -          $      -
  ------------------------------------------------------------------------------
</TABLE> 

                                       16
<PAGE>
 
EV Marathon Stock Fund as of June 30, 1997

INVESTMENT MANAGEMENT


EV Marathon Stock 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,
      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 Incorported
                            
                               Jack L. Treynor  
                               Investment Adviser and Consultant  

                                                                          
Stock Portfolio                                                   
                                                                          
      Officers                 Independent Trustees               
      James B. Hawkes          Donald R. Dwight                   
      President and Trustee    President, Dwight Partners,        
                               Chairman, Newspapers of New England, Inc.
      Duncan W. Richardson                                              
      Vice President and       Samuel L. Hayes, III                     
      Portfolio Manager        Jacob H. Schiff Professor of Investment  
                               Banking, Harvard University Graduate School of
      James L. O'Connor        Business Administration                       
      Treasurer                                                              
                               Norton H. Reamer                              
      Alan R. Dynner           President and Director, United Asset          
      Secretary                Management Corporation                        
                                                                             
                               John L. Thorndike                             
                               Formerly Director, Fiduciary Company Incorporated
                                                                   
                               Jack L. Treynor                     
                               Investment Adviser and Consultant   

                                       17
<PAGE>
 
                      This Page Intentionally Left Blank
<PAGE>
 
                      This Page Intentionally Left Blank
<PAGE>
 

Investment Adviser of Stock Portfolio
Boston Management and Research
24 Federal Street
Boston, MA 02110


Administrator of EV Marathon Stock 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 Agent
First Data Investor Services Group
Attention: Eaton Vance Funds
P.O. Box 5123
Westborough, MA 01581-5123








EV Marathon Stock 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 sales charges and 
expenses. Please read the prospectus carefully before you invest or send money.
- --------------------------------------------------------------------------------
                                                                    M-STSRC-8/97


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