EATON VANCE SPECIAL INVESTMENT TRUST
N-30D, 1998-03-17
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<PAGE>
 

[LOGO      Investing                                      [PHOTO OF CALCULATOR
APPEARS    for the                                        & FINANCIAL NEWSPAPER
HERE]      21st                                           APPEARS HERE]
           Century                


  

Annual Report December 31, 1997


                                      EV

                                    CLASSIC

                                INVESTORS FUND

[PHOTO OF NYSE FLAG
APPEARS HERE]

                                  Eaton Vance

                     Global Management-Global Distribution


                                                                C l a s s i c

[PHOTO OF FLOOR OF NYSE
APPEARS HERE]
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997

LETTERS TO SHAREHOLDERS

[PHOTO APPEARS HERE]

For the year ended December 31, 1997, EV Classic Investors Fund had a total
return of 19.8%./1/ This return resulted from an increase in net asset value to
$13.24 per share on December 31, 1997 from $12.20 per share on December 31, 1996
and the reinvestment of $0.115 per share in income dividends and $1.215 per
share in capital gains distributions. This return compared favorably to the
average total return for mutual funds in the Lipper Balanced Funds Category*
which was 19.0% for the period.

The U.S. economy continued to grow at a healthy rate in 1997. Gross domestic
product, the primary indicator of economic performance, increased 3.8%,
exceeding most predictions made at the beginning of the year. Unemployment
declined 0.6% to 4.7%, and 3.2 million new jobs were created. The inflation
rate, which historically has risen after periods of sustained growth and low
unemployment, declined from the previous year. The consumer price index
increased only 1.7% in 1997, compared to 3.3% in 1996, and wholesale prices
decreased 1.2% -- the largest drop since 1986. Many economists, including
Federal Reserve Chairman Alan Greenspan, attribute this continued low inflation
to the effects of increasing global competition, a strong dollar, and higher
productivity brought on by advances in technology.

The stock market's performance in 1997 exceeded 20% for a record third
consecutive year. The S&P 500 Index* rose 31% during the year, with a relatively
small group of large capitalization stocks providing the leadership. There 
was considerable volatility during the year, marked by significant market 
declines -- the first in the spring, and a second, steeper decline in October
caused by economic turmoil in several important Asian countries. In both cases,
stock prices recovered.

In the bond market, long-term interest rates were on a rising trend through
April, as evidence emerged of stronger-than-expected economic growth. Rates then
reversed course and declined through the end of the year, reflecting declining
federal budget deficits and falling inflation.

The stock market's increased volatility illustrates the benefits of a balanced
approach to investing and of maintaining a long-term outlook. By staying with an
investment through the inevitable market cycles, investors can reduce the impact
of any one downturn. Moreover, a professionally managed mutual fund with
diversified asset classes can help to reduce risk further. In the pages that
follow, Portfolio Manager Thomas E. Faust Jr. discusses the economy, the stock
and bond markets, and the Fund's performance in 1997.

                             Sincerely,

                             /s/ M. Dozier Gardner

                             M. Dozier Gardner,
                             President
                             February 9, 1998

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

Performance/2/
- -------------------------------------------------

Average Annual Total Returns (at net asset value)
- -----------------------------------------------------------
One Year                             19.8%

Life of Fund (11/2/93)               12.7



SEC Average Annual Total Returns (including applicable CDSC)
- ------------------------------------------------------------
One Year                             18.8%

Life of Fund (11/2/93)               12.7


Ten Largest Equity Holdings/3/
- -------------------------------------------------------------
Sofamor Danek                        3.4%
Allstate                             2.5
Home Depot                           2.1
Norwest                              2.1
General RE                           1.9
CVS                                  1.8
Unilever                             1.7
Mutual Risk Management               1.7
Warner Lambert                       1.7
Chase Manhattan Corp.                1.7



/1/ This return does not include the applicable contingent deferred sales charge
    (CDSC).
/2/ Returns are calculated by determining the percentage change in net asset
    value with all distributions reinvested. SEC Return for one year reflects 1%
    CDSC.
/3/ By total net assets. Ten largest holdings are as of 12/31/97 only and may
    not be representative of the Portfolio's current or future investments.
    Holdings accounted for 20.6% 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 a Lipper Category or an Index.
    Past performance is no guarantee of future results. Investment return and
    principal value will fluctuate so that shares, when redeemed, may be worth
    more or less than their original cost.

- --------------------------------------------------------------------------------
 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.
- --------------------------------------------------------------------------------

                                       2
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997

MANAGEMENT DISCUSSION


An interview with Thomas E. Faust Jr., Vice President and Portfolio Manager of
the Investors Portfolio 

[PHOTO OF THOMAS E. FAUST JR. APPEARS HERE]

Thomas E. Faust Jr.,
 Portfolio Manager

Q: Tom, how would you describe the stock market's 1997 performance?

A: 1997 was another strong year for the stock market, with returns exceeding 20%
   for an unprecedented third consecutive year. The market benefited from a
   variety of positive factors, including continued strong earnings and a
   favorable interest rate environment. In addition, the stock market survived
   two major corrections -- one in the spring, and a second, more severe one in
   October. In each case, equity prices recovered, showing a level of resilience
   that surprised many analysts. After the second correction, brought on in part
   by economic turmoil in Asia, the companies that recovered the fastest were
   those with little exposure to Asia or which benefited from weaker Asian
   currencies. Companies suffering the biggest declines in the fourth quarter
   were those most sensitive to Asia's economic problems, including basic
   materials companies and technology firms. The U.S. financial markets --
   especially the bond market -- benefitted from a flight to quality, as
   investors sought a safe haven from the Asian crisis.

Q: That leads to the second major asset class of this Portfolio -- bonds. How
   would you characterize the U.S. bond market during 1997?

A: Overall, 1997 was a good year for the bond market, with a general decline in
   interest rates over the 12-month period. In the spring, rates rose sharply on
   developing evidence that the economy was growing at a faster-than-expected
   rate. After rates peaked in April, news of a balanced budget agreement, a
   slowing economy, and continued low inflation contributed to a rally in the
   bond market, and interest rates generally trended downward through the end of
   the year. Recently, the problems in Asia and ensuing flight to quality among
   global bond investors have driven U.S. bond prices still higher, leading to
   interest rates on long-term government bonds that are lower than have been
   seen in over a decade. Furthermore, the Asian situation has resulted in a
   widening of quality spreads -- the difference between high quality and lower
   quality corpo-

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

Portfolio Allocation+
- -----------------------------------------------------------
As a percentage of total net assets

[PIE CHART APPEARS HERE]

Cash                1.1%
Equities           69.3%
Fixed Income       29.6%


Five Largest Equity Sectors+
- ------------------------------------------------------------
As a percentage of total net assets

[BAR GRAPH APPEARS HERE]

Financial           14.4%
Drugs                7.7%
Medical Products     5.6%
Retail               5.2%
Oil & Gas            4.4%

+ Portfolio allocation and five largest sectors are subject to change due to
  active management.

                                       3
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997

MANAGEMENT DISCUSSION CONT'D


rate bond yields -- and has flattened the yield curve, which means that the
difference between short-term and long-term interest rates has narrowed.

Q: Finance is a large weighting in this Portfolio How did stocks in this sector
   perform during the year?

A: It was a very good year for this sector. Many of our financial sector stocks
   are in the insurance and banking sectors, which are generally sensitive to
   interest rate movements. Given that it was a good year for the bond market,
   and that their core businesses were buoyed by a strong economy, insurance and
   banking stocks performed very well in 1997. Within domestic banking, there
   was significant consolidation during the year which tends to boost stock
   valuations for the industry as a whole. Consolidation also helped lower
   operating costs, thereby increasing profitability in the sector.

Q: How did health care stocks, also a large weighting, perform during the
   12-month period?

A: The health care stocks in this Portfolio, which consist primarily of large
   pharmaceutical companies with significant new products, performed very well
   during the year. Generally speaking, large capitalization health care stocks 
   -- primarily big pharmaceutical companies -- had a very good year in 1997,
   whereas smaller biotechnology and health care services stocks performed
   poorly. Drug stocks benefited from a streamlined FDA approval process and
   increased use by managed care companies.

Q: What impact did the market's sharp decline in October have on the Portfolio?

A: Because the Portfolio is invested in equities, it experienced a decline
   during the market's broad-based October correction. Fortunately, the
   Portfolio outperformed the large equity indexes, primarily as a result of the
   mix of asset classes in the Portfolio. The bond and cash investments acted as
   a hedge against the decline in equity prices. This experience illustrates the
   basic investment rule that diversification makes sense, particularly in an
   environment of increased volatility. A balanced asset allocation among 
   stocks, bonds and cash provides a built-in hedge, and -- although past
   experience does not guarantee future results -- it may explain why this Fund
   has had only one year with a negative total return in the past 23 years.

Q: How would you characterize the economy right now?

A: The U.S. economy continues to be robust, and the consensus expectation for
   1998 is that it should continue to expand. GDP is expected to rise in the 2-
   3% range, with inflation remaining below 2%. Interest rates could continue
   their downward trend as long as inflation remains low. Moreover, the capital
   gains tax rate was cut in 1997, and we have seen a significant decline in
   energy prices. In this late stage of the expansion, however, there are some
   indications of weakness, including the impact on U.S. companies of weakened
   economic growth in Asia, as well as an increase in the U.S. of consumer
   bankruptcies and consumer debt levels.

Q: Of the Portfolio's corporate bond holdings, most have "put" option features.
   What are the benefits of "put" bonds?

A: A bond with a "put" feature gives the holder -- in this case, the Portfolio
   -- the right to sell (or "put") the bond back to the issuer at a specific
   price and date in the future. As a result of this feature, put bonds perform
   like a long bond in a market rally and like a short bond during a decline.
   Hence, the feature acts a bit like an insurance policy for the holder when
   prices drop. These bonds command a premium in the market, but we think the
   put feature is worth the added cost.


                                       4
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997

MANAGEMENT DISCUSSION CONT'D


Q: What is your outlook for the stock and bond markets in 1998?

A: I continue to have a generally positive outlook for both the stock and bond
   markets, but I tend to be more bullish about bonds for the coming year. If
   inflation remains low, which it should, interest rates should continue to
   decline. The keys to another good year for the stock market are low interest
   rates, continued economic growth, strong corporate profitability, and
   sustained cash flows into U.S. stocks from domestic and foreign investors.
   The biggest concern with the stock market is that valuations are high, but
   one can make an argument that low inflation and declining interest rates
   support current valuations. As always, we remain long-term investors, and
   will continue to make adjustments in the portfolio as economic and market
   conditions warrant.

           Comparison of Change in Value of a $10,000 Investment in
           EV Classic Investors Fund vs. the Standard & Poor's 500,
        Lehman Bros. Govt./Corp. Bond Index and 90-Day Treasury Bills*

                  November 30, 1993 through December 31, 1997

                           [LINE GRAPH APPEARS HERE]

               EV Classic                     Lehman Govt./          90-Day
  Date       Investors Fund      S&P 500    Corp. Bond Index     Treasury Bills*
  ----       --------------      -------    ----------------     --------------
11/30/93         $10,000         $10,000         $10,000            $10,000
12/31/93         $10,151         $10,123         $10,044            $10,077
 1/31/94         $10,523         $10,475         $10,195            $10,077
 2/28/94         $10,286         $10,183         $ 9,973            $10,077
 3/31/94         $ 9,912         $ 9,740         $ 9,729            $10,165
 4/30/94         $ 9,983         $ 9,877         $ 9,649            $10,165
 5/31/94         $ 9,979         $10,024         $ 9,631            $10,165
 6/30/94         $ 9,765         $ 9,781         $ 9,608            $10,271
 7/31/94         $10,009         $10,113         $ 9,800            $10,271
 8/31/94         $10,189         $10,517         $ 9,804            $10,271
 9/30/94         $ 9,953         $10,259         $ 9,656            $10,394
10/31/94         $10,045         $10,497         $ 9,645            $10,394
11/30/94         $ 9,840         $10,107         $ 9,628            $10,394
12/31/94         $ 9,788         $10,257         $ 9,691            $10,539
 1/31/95         $ 9,922         $10,529         $ 9,877            $10,539
 2/28/95         $10,269         $10,932         $10,106            $10,539
 3/31/95         $10,477         $11,254         $10,174            $10,688
 4/30/95         $10,705         $11,596         $10,316            $10,688
 5/31/95         $11,110         $12,044         $10,748            $10,688
 6/30/95         $11,256         $12,328         $10,834            $10,830
 7/31/95         $11,464         $12,746         $10,793            $10,830
 8/31/95         $11,652         $12,768         $10,931            $10,830
 9/30/95         $11,798         $13,307         $11,042            $10,970
10/31/95         $11,778         $13,267         $11,204            $10,970
11/30/95         $12,070         $13,839         $11,388            $10,970
12/31/95         $12,398         $14,107         $11,556            $11,104
 1/31/96         $12,556         $14,594         $11,628            $11,104
 2/28/96         $12,587         $14,721         $11,381            $11,104
 3/31/96         $12,640         $14,864         $11,286            $11,243
 4/30/96         $12,725         $15,093         $11,208            $11,243
 5/31/96         $12,841         $15,467         $11,189            $11,243
 6/30/96         $12,947         $15,531         $11,339            $11,386
 7/31/96         $12,491         $14,850         $11,365            $11,386
 8/31/96         $12,751         $15,160         $11,337            $11,386
 9/30/96         $13,123         $16,011         $11,539            $11,529
10/31/96         $13,357         $16,459         $11,808            $11,529
11/30/96         $13 949         $17,696         $12,026            $11,529
12/31/96         $13,823         $17,345         $11,892            $11,675
 1/31/97         $14,378         $18,437         $11,906            $11,675
 2/28/97         $14,400         $18,574         $11,931            $11,675
 3/31/97         $13,946         $17,811         $11,789            $11,826
 4/30/97         $14,411         $18,882         $11,961            $11,826
 5/31/97         $15,040         $20,018         $12,073            $11,826
 6/30/97         $15,488         $20,918         $12,218            $11,978
 7/31/97         $16,431         $22,584         $12,592            $11,978
 8/31/97         $15,741         $21,319         $12,450            $11,978
 9/30/97         $16,340         $22,484         $12,646            $12,125
10/31/97         $16,156         $21,740         $12,849            $12,125
11/30/97         $16,392         $22,741         $12,916            $12,125
12/31/97         $16,553         $23,130         $13,052            $12,285
   
Fund Performance+
- ------------------------------------------------------------

Average Annual Total Returns (at net asset value)
- ------------------------------------------------------------
One Year                                       19.8%

Life of Fund (11/2/93)                         12.7


SEC Average Annual Total Returns (including applicable CDSC)
- ------------------------------------------------------------
One Year                                       18.8%

Life of Fund (11/2/93)                         12.7


* Source: Towers Data Systems, Bethesda, MD. Investment operations commenced
  11/2/93. Index information is available only at month-end; therefore, the
  line comparison begins at the next month-end following the commencement of
  the Fund's investment operations.

  The chart compares the Fund's total return with those of the S&P 500 Index,
  the Lehman Brothers Government/Corporate Bond Index, and 90-Day U.S. Treasury
  Bills. The S&P 500 is a broad-based unmanaged index of 500 common stocks. The
  Lehman Brothers Corporate/Government Index is a diversified, unmanaged index
  of corporate and U.S. government bonds. The 90-Day Treasury Bill returns are
  shown to indicate how the Fund performed relative to a portfolio of cash
  equivalents. Returns are calculated by determining the percentage change in
  net asset value with all distributions reinvested. The lines on the chart
  represent the total returns of $10,000 hypothetical investments in the Fund,
  the S&P 500 Index, the Lehman Brothers Corporate/Government Bond Index, and 
  90-Day U.S. Treasury Bills. The Indices' total returns do not reflect any
  commissions or expenses that would have been incurred if an investor
  individually purchased or sold the securities represented in them. It is not
  possible to invest directly in an Index.

+ Returns are calculated by determining the percentage change in net asset value
  with all distributions reinvested. SEC Return for one year reflects 1%
  contingent deferred sales charge (CDSC).

  Past performance is no guarantee of future results. Investment return and
  principal value will fluctuate so that shares, when redeemed, may be worth
  more or less than their original cost.

                                       5
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997

FINANCIAL STATEMENTS

Statement of Assets and Liabilities 


As of December 31, 1997
Assets
- -------------------------------------------------------------------------
Investment in Investors Portfolio (Portfolio), at value 
    (Note 1A) (identified cost, $5,437,364)                   $7,288,623
Receivable for Fund shares sold                                   54,756
Deferred organization expenses (Note 1E)                           8,453
- -------------------------------------------------------------------------
Total assets                                                  $7,351,832
- -------------------------------------------------------------------------


Liabilities
- -------------------------------------------------------------------------
Payable for Fund shares redeemed                              $   25,083
Payable to affiliate for Trustees' fees (Note 4)                      40
Accrued expenses                                                  18,915
- -------------------------------------------------------------------------
Total liabilities                                             $   44,038
- -------------------------------------------------------------------------
Net Assets for 552,006 shares of
    beneficial interest outstanding                           $7,307,794
- -------------------------------------------------------------------------


Sources of Net Assets
- -------------------------------------------------------------------------
Paid-in capital                                               $5,452,956
Accumulated net realized loss on investments from
    Portfolio (computed on the basis of identified cost)            (505)
Accumulated undistributed net investment income                    4,084
Net unrealized appreciation of investments from
    Portfolio (computed on the basis of identified cost)       1,851,259
- -------------------------------------------------------------------------
Total                                                         $7,307,794
- -------------------------------------------------------------------------


Net Asset Value, Offering and Redemption
Price Per Share (Note 6)
- -------------------------------------------------------------------------
($7,307,794 / 552,006 shares of
     beneficial interest outstanding)                         $    13.24
- -------------------------------------------------------------------------


Statement of Operations

For the Year Ended
December 31, 1997
Investment Income (Note 1B)
- -------------------------------------------------------------------------
Dividend income allocated from Portfolio
    (net of foreign taxes, $756)                              $   91,979
Interest income allocated from Portfolio                         159,078
Expenses allocated from Portfolio                                (52,137)
- -------------------------------------------------------------------------
Net investment income from Portfolio                          $  198,920
- -------------------------------------------------------------------------


Expenses
- -------------------------------------------------------------------------
Compensation of Trustees not members of the
    Administrator's organization (Note 4)                     $      163
Distribution and service fees (Note 5)                            75,665
Printing and postage                                              17,463
Legal and accounting services                                     15,876
Registration fees                                                 14,969
Transfer and dividend disbursing agent fees                        8,564
Amortization of organization expenses (Note 1E)                    8,008
Custodian fee                                                      4,728
- -------------------------------------------------------------------------
Total expenses                                                $  145,436
- -------------------------------------------------------------------------


Net investment income                                         $   53,484
- -------------------------------------------------------------------------


Realized and Unrealized
Gain (Loss) from Portfolio
- -------------------------------------------------------------------------
Net realized gain (loss) --
    Investment transactions (identified cost basis)           $  559,842
- -------------------------------------------------------------------------
Net realized gain on investment transactions                  $  559,842
- -------------------------------------------------------------------------
Change in unrealized appreciation (depreciation) --
    Investments                                               $  737,634
- -------------------------------------------------------------------------
Net change in unrealized appreciation (depreciation)
    of investments                                            $  737,634
- -------------------------------------------------------------------------

Net realized and unrealized gain on investments               $1,297,476
- -------------------------------------------------------------------------

Net increase in net assets from operations                    $1,350,960
- -------------------------------------------------------------------------

                       See notes to financial statements

                                       6
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997 

FINANCIAL STATEMENTS CONT'D

Statements of Changes in Net Assets

Increase (Decrease)                Year Ended          Year Ended
in Net Assets                      December 31, 1997   December 31, 1996
- -------------------------------------------------------------------------
From operations --
    Net investment income                $    53,484         $    92,896
    Net realized gain on investments         559,842             428,121
    Net change in unrealized
        appreciation (depreciation)                       
        of investments                       737,634             258,944
- -------------------------------------------------------------------------
Net increase in net assets               
    from operations                      $ 1,350,960         $   779,961
- -------------------------------------------------------------------------
Distributions to shareholders
    (Note 2) --
    From net investment income           $   (61,991)        $   (89,656)
    From net realized gain on investments   (630,671)           (394,246)
    From paid-in capital                        (582)                 --
- -------------------------------------------------------------------------
Total distributions to shareholders      $  (693,244)        $  (483,902)
- -------------------------------------------------------------------------    
Transactions in shares of beneficial 
    interest (Note 3) --
    Proceeds from sale of shares         $ 2,385,438         $ 2,746,661
    Net asset value of shares issued 
        to shareholders in payment of                           
        distributions declared               687,329             416,719
    Cost of shares redeemed               (3,436,407)         (3,012,119)
- -------------------------------------------------------------------------
Net increase (decrease) in net assets 
    from Fund share transactions         $  (363,640)        $   151,261
- -------------------------------------------------------------------------

Net increase in net assets               $   294,076         $   447,320
- -------------------------------------------------------------------------


Net Assets
- -------------------------------------------------------------------------
At beginning of year                     $ 7,013,718         $ 6,566,398
- -------------------------------------------------------------------------
At end of year                           $ 7,307,794         $ 7,013,718
- -------------------------------------------------------------------------


Accumulated undistributed net
investment income included in net
assets
- -------------------------------------------------------------------------
At end of year                           $     4,084         $     7,816
- -------------------------------------------------------------------------

                       See notes to financial statements

                                       7
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997 

FINANCIAL STATEMENTS CONT'D

Financial Highlights

<TABLE> 
<CAPTION> 
 
                                                                           Year Ended December 31,         Year Ended January 31,
                                                                  -------------------------------------  ---------------------------
                                                                      1997          1996         1995*         1995         1994 **
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                               <C>             <C>         <C>        <C>           <C>       
Net asset value -- Beginning of year                                 $12.200       $11.740    $ 9.610         $10.460     $ 10.000 
- ------------------------------------------------------------------------------------------------------------------------------------
Income (loss) from operations
- ------------------------------------------------------------------------------------------------------------------------------------
Net investment income                                                $ 0.099       $ 0.155    $  0.135         $ 0.215    $  0.025
Net realized and unrealized gain (loss) on investments                 2.271         1.175       2.240          (0.810)      0.435
- ------------------------------------------------------------------------------------------------------------------------------------
Total income (loss) from operations                                  $ 2.370       $ 1.330    $  2.375         $(0.595)   $  0.460
- ------------------------------------------------------------------------------------------------------------------------------------


Less distributions
- ------------------------------------------------------------------------------------------------------------------------------------
From net investment income                                           $(0.114)      $(0.150)   $ (0.128)        $(0.166)   $    --
In excess of net investment income                                        --            --         --           (0.074)        --
From net realized gain on investments                                 (1.215)       (0.720)     (0.117)         (0.002)        --
From tax return of capital                                            (0.001)           --         --               --         --
From paid-in capital                                                      --            --         --           (0.013)        --
- ------------------------------------------------------------------------------------------------------------------------------------
Total distributions                                                  $(1.330)      $(0.870)   $ (0.245)        $(0.255)   $    --
- ------------------------------------------------------------------------------------------------------------------------------------

Net asset value -- End of year                                       $13.240       $12.200    $ 11.740         $ 9.610    $ 10.460
- ------------------------------------------------------------------------------------------------------------------------------------
 
Total Return/(1)/                                                      19.75%        11.50%      24.94%          (5.71)%      4.60%
- ------------------------------------------------------------------------------------------------------------------------------------

Ratios/Supplemental Data ++
- ------------------------------------------------------------------------------------------------------------------------------------
Net assets, end of year (000's omitted)                              $ 7,308       $ 7,014    $  6,566         $ 2,073     $   664
Ratio of net expenses to average daily net assets/(2)/                  2.61%         2.61%       3.27%+          3.23%       1.68%+
Ratio of net investment income to average daily net assets              0.71%         1.33%       1.21%+          1.49%       1.81%+
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE> 
++  The operating expenses of the Fund and the Portfolio may reflect an
    allocation of expenses to the Administrator. Had such action not been taken,
    the ratios and net investment income (loss) would have been as follows:

<TABLE> 
<CAPTION> 

Ratios (As a percentage of average daily net assets):
<S>                                                               <C>             <C>         <C>        <C>             <C>       
    Expenses/(2)/                                                         --            --        3.59%+          5.55%       4.97%+
    Net investment income (loss)                                          --            --        0.90%+         (0.83)%    (1.46)%+
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE> 
+     Annualized.

*     For the eleven month period ended December 31, 1995.

**    For the period from the start of business, November 2, 1993, to 
      January 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 ex-date. Total return is not
      computed on an annualized basis.

/(2)/ Includes the Fund's share of its Portfolio's allocated expenses.

                       See notes to financial statements

                                       8


<PAGE>
 
EV Classic Investors Fund as of December 31, 1997

NOTES TO FINANCIAL STATEMENTS


1  Significant Accounting Policies
   ----------------------------------------------------------------------------
   EV Classic Investors Fund (the Fund) is a diversified series of Eaton Vance
   Special Investment Trust (the Trust). The Trust is an entity of the type
   commonly known as a Massachusetts business trust and is registered under the
   Investment Company Act of 1940, as amended, as an open-end, management
   investment company. The Fund invests all of its investable assets in
   interests in the Investors 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 (2.2% at December 31, 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.
   
   On June 23, 1997, the Board of Trustees approved a Plan of Reorganization
   (the "Plan") for the Trust. Under the terms of the Plan, the EV Traditional
   Investors Fund (the Successor Fund), a separate series of the Trust, would
   acquire substantially all of the assets and liabilities of the Fund (the
   Acquired Fund). The transaction will be structured for tax purposes to
   qualify as a tax-free reorganization under the Internal Revenue Code. The
   Trust will issue and deliver to the Acquired Fund a number of full and
   fractional shares of beneficial interest of a separate class of the
   Successor Fund (Class C shares), which will be equal in value to the net
   asset value per share of the Acquired Fund multiplied by the number of full
   and fractional shares of the Acquired Fund then outstanding. Such
   transaction will occur after the close of business, on December 31, 1997.
   
   Effective January 1, 1998, the EV Traditional Investors Fund changed its
   name to Eaton Vance Investors Fund.
   
   A Investment Valuations -- Valuation 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 determined in accordance with generally
   accepted accounting principles.
   
   C 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 and tax-exempt
   income, including any net realized gain on investments. Accordingly, no
   provision for federal income or excise tax is necessary. Pursuant to Section
   852 of the Internal Revenue Code, the Fund designated $155,420 at 28% and
   $356,141 at 20% as a long-term capital gains distribution for its taxable
   year ended December 31, 1997.
   
   D Deferred Organization Expenses -- Costs incurred by the Fund in connection
   with its organization are being amortized on a straight-line basis over five
   years.
   
   E Expense Reduction -- Investors Bank & Trust Company (IBT) serves as
   custodian to the Fund and the Portfolio. Pursuant to the respective
   custodian agreements, IBT receives a fee reduced by credits which are
   determined based on the average daily cash balances the Fund or Portfolio
   maintains with IBT. All significant credit balances used to reduce the
   Fund's or Portfolio's custodian fees are reflected as a reduction of
   operating expenses on the Statement of Operations.
   
   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 revenue and expense during the reporting period. Actual results
   could differ from those estimates.
   

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
   expenses) and to distribute at least annually all or substantially all of
   the net realized capital gains (reduced by any available capital loss
   carryforwards from prior years) so allocated. Shareholders may reinvest all
   distributions in shares of the Fund at the

                                       9
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997 

NOTES TO FINANCIAL STATEMENTS CONT'D


   per share net asset value as of the close of business on the ex-dividend
   date. 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 over-distributions 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.
   
3  Shares of Beneficial Interest
   ----------------------------------------------------------------------------
   The Fund's 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:
   
                                           Year Ended December 31,
                                   ----------------------------------------
                                           1997                  1996
   -------------------------------------------------------------------------
    Sales                                178,819               227,564
    Issued to shareholders
      electing to
      receive payments of                 52,657                34,528
      distributions in Fund shares
   Redemptions                         (254,159)              (246,859)
   ------------------------------------------------------------------------
   
   Net increase (decrease)              (22,683)                15,233
   ------------------------------------------------------------------------
   

4  Transactions with Affiliates
   ----------------------------------------------------------------------------
   Eaton Vance Management (EVM) serves only 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 2 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 organizations, 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 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 pay
   the principal underwriter, Eaton Vance Distributors, Inc. (EVD), amounts
   equal to 1/365 of 0.75% (0.75% annually) 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) 6.25% 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 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. EVD earned $56,749 for the year ended December 31, 1997,
   representing 0.75% (annualized) of the daily average net assets. At December
   31, 1997, the amount of Uncovered Distribution Charges EVD calculated under
   the Plan was approximately $963,000.
   
   In addition, the Plan permits the Fund to make payments of service fees to
   the Principal Underwriter in amounts not expected to exceed 0.25% of the
   Fund's average daily net assets for any fiscal year. The Trustees have
   implemented the Plan by authorizing the Fund to make monthly service fee
   payments to Authorized Firms in amounts anticipated to be equivalent to
   0.25%, annualized, of the assets maintained in the Fund by their customers.
   EVD currently expects to pay to an Authorized Firm a service fee at the time
   of sale equal to 0.25% of the purchase price of the shares sold by such Firm
   and monthly payments of service fees in amounts not expecting to exceed
   0.25% per annum of the Funds' average daily net assets based on a value of
   Fund shares sold by such Firm and remaining outstanding for at least one
   year. Provisions for service fee payments for the year ended December 31,
   1997 amounted to $18,916. During the first year after a purchase of Fund
   shares, EVD will retain the service fee as reimbursement for the service fee
   payment made to an Authorized Firm at the time of sale. Service fee payments
   are made for personal services and/or the maintenance of shareholder
   accounts. Service fees paid to EVD and Authorized Firms 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

                                       10
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997 

NOTES TO FINANCIAL STATEMENTS CONT'D


   Uncovered Distribution Charges of EVD. Certain officers and Trustees of the
   Fund are officers and directors of EVD.
   

6  Contingent Deferred Sales Charge (CDSC)
   ----------------------------------------------------------------------------
   For shares purchased on or after January 30, 1995, a contingent deferred
   sales charge (CDSC) of 1% is imposed on any redemption of Fund shares made
   within one year 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 reinvestment of dividends or capital gains
   distributions. No CDSC is levied on shares which have been sold to EVD or
   its affiliates or to their respective employees. 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 credited to the Fund. For the year ended
   December 31, 1997, EVD received approximately $5,000 of CDSC paid by
   shareholders.
   

7  Investment Transactions
   ----------------------------------------------------------------------------
   Increases and decreases in the Fund's investment in the Portfolio for the
   year ended December 31, 1997 aggregated $2,415,536 and $3,688,029,
   respectively.

                                       11
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997

INDEPENDENT ACCOUNTANTS' REPORT


To the Board of Trustees and Shareholders
of EV Classic Investors Fund:
- --------------------------------------------------------------------------------
We have audited the accompanying statement of assets and liabilities of EV
Classic Investors Fund (the Fund), a series of Eaton Vance Special Investment
Trust, as of December 31, 1997, and the related statement of operations for the
year then ended, the statements of changes in net assets for each of the two
years then ended and the financial highlights for each of the two years in the
period then ended, the eleven month period ended December 31, 1995, the year
ended January 31, 1995 and the period from November 2, 1993 (start of business)
to January 31, 1994. These financial statements and financial highlights are the
responsibility of the Fund's management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of the
Fund at December 31, 1997, the results of its operations for the year then
ended, the changes in its net assets for each of the two years in the period
then ended and the financial highlights for each of the two years then ended,
the eleven month period ended December 31, 1995, the year ended January 31,
1995, and the period from November 2, 1993 (start of business) to January 31,
1994, in conformity with generally accepted accounting principles.

                                          COOPERS & LYBRAND L.L.P.
                                          Boston, Massachusetts
                                          February 06, 1998

                                      12
<PAGE>
 
Investors Portfolio as of December 31, 1997

PORTFOLIO OF INVESTMENTS


Common Stocks -- 68.5%                      


Security                                 Shares             Value
- -------------------------------------------------------------------------

Aerospace and Defense -- 1.2%
- -------------------------------------------------------------------------
General Motors Corp., Class H            100,000            $  3,693,750
Raytheon Co. Class A                       3,826                 188,679
- -------------------------------------------------------------------------
                                                            $  3,882,429
- -------------------------------------------------------------------------

Auto and Parts -- 2.5%
- -------------------------------------------------------------------------
General Motors Corp.                      60,000            $  3,637,500
Magna International, Inc. Class A         75,000               4,710,938
- -------------------------------------------------------------------------
                                                            $  8,348,438

- -------------------------------------------------------------------------
Banks - Regional -- 2.1%
- -------------------------------------------------------------------------
Norwest Corp.                            180,000            $  6,952,499
- -------------------------------------------------------------------------
                                                            $  6,952,499

- -------------------------------------------------------------------------
Banks and Money Services -- 2.6%
- -------------------------------------------------------------------------
Banco Latinoamericano de Exportaciones    75,000            $  3,103,125
Chase Manhattan Corp.                     50,200               5,496,900
- -------------------------------------------------------------------------
                                                            $  8,600,025
- -------------------------------------------------------------------------

Beverages -- 1.4%
- -------------------------------------------------------------------------
PepsiCo, Inc.                            130,000            $  4,736,875
- -------------------------------------------------------------------------
                                                            $  4,736,875
- -------------------------------------------------------------------------

Chemicals -- 2.1%
- -------------------------------------------------------------------------
Monsanto Corp.                            65,000            $  2,730,000
Praxair, Inc.                             80,000               3,600,000
Solutia, Inc.                             25,000                 667,188
- -------------------------------------------------------------------------
                                                            $  6,997,188
- -------------------------------------------------------------------------

Computers and Business Equipment -- 2.3%
- -------------------------------------------------------------------------
Hewlett-Packard Co.                       60,000            $  3,750,000
Xerox Corp.                               51,000               3,764,438
- -------------------------------------------------------------------------
                                                            $  7,514,438
- -------------------------------------------------------------------------

Drugs -- 7.7%
- -------------------------------------------------------------------------
Astra AB Class A                         266,666            $  4,621,215
Elan Corp., PLC, ADR*                     75,000               3,839,063
Eli Lilly & Co.                           70,000               4,873,750
Pfizer, Inc.                              37,800               2,818,463
Smithkline Beecham PLC, ADR               70,000               3,600,625
Warner-Lambert Co.                        45,000               5,580,000
- -------------------------------------------------------------------------
                                                            $ 25,333,116
- -------------------------------------------------------------------------

Electric Utilities -- 1.1%
- -------------------------------------------------------------------------
The Southern Co.                         140,000            $  3,622,500
- -------------------------------------------------------------------------
                                                            $  3,622,500
- -------------------------------------------------------------------------

Electronics - Semiconductors -- 2.2%
- -------------------------------------------------------------------------
Intel Corp.                               70,000            $  4,917,500
LSI Logic, Inc.*                         120,000               2,370,000
- -------------------------------------------------------------------------
                                                            $  7,287,500
- -------------------------------------------------------------------------

Financial - Miscellaneous -- 3.6%
- -------------------------------------------------------------------------
Federal National Mortgage Association     75,000            $  4,279,688
MBNA Corp.                               120,000               3,277,500
MGIC Investment Corp.                     65,000               4,322,500
- -------------------------------------------------------------------------
                                                            $ 11,879,688
- -------------------------------------------------------------------------

Foods -- 1.8%
- -------------------------------------------------------------------------
Unilever ADR                              92,000            $  5,744,250
- -------------------------------------------------------------------------
                                                            $  5,744,250
- -------------------------------------------------------------------------

Household Products -- 0.9%
- -------------------------------------------------------------------------
Kimberly-Clark Corp.                      62,400            $  3,077,100
- -------------------------------------------------------------------------
                                                            $  3,077,100
- -------------------------------------------------------------------------

Information Services -- 1.3%
- -------------------------------------------------------------------------
Reuters Holdings PLC, ADR                 65,000            $  4,306,250
- -------------------------------------------------------------------------
                                                            $  4,306,250
- -------------------------------------------------------------------------

Insurance -- 6.1%
- -------------------------------------------------------------------------
Allstate Corp.                            90,000            $  8,178,749
General RE Corp.                          30,000               6,359,999
Mutual Risk Management Ltd.              186,600               5,586,338
- -------------------------------------------------------------------------
                                                            $ 20,125,086
- -------------------------------------------------------------------------

                       See notes to financial statements

                                       13
<PAGE>
 
Investors Portfolio as of December 31, 1997

PORTFOLIO OF INVESTMENTS CONT'D


Security                                 Shares             Value               
- -------------------------------------------------------------------------

Machinery -- 1.3%
- -------------------------------------------------------------------------
Deere and Co.                             75,000            $  4,373,438
- -------------------------------------------------------------------------
                                                            $  4,373,438
- -------------------------------------------------------------------------

Medical Products -- 5.6%
- -------------------------------------------------------------------------
Baxter International, Inc.                80,000            $  4,035,000
Boston Scientific Corp.*                  75,000               3,440,625
Sofamor Danek Group, Inc.*               170,300              11,080,143
- -------------------------------------------------------------------------
                                                            $ 18,555,768
- -------------------------------------------------------------------------

Metals and Minerals -- 2.7%
- -------------------------------------------------------------------------
J & L Specialty Steel, Inc.              200,000            $  2,012,500
Potash Corp. of Saskatchewan              55,000               4,565,000
Steel Dynamics Corp.*                    150,000               2,400,000
- -------------------------------------------------------------------------
                                                            $  8,977,500
- -------------------------------------------------------------------------

Oil and Gas - Exploration
and Production -- 1.9%
- -------------------------------------------------------------------------
Anadarko Petroleum Corp.                  60,000            $  3,641,250
Triton Energy Ltd.*                       90,000               2,626,875
- -------------------------------------------------------------------------
                                                            $  6,268,125
- -------------------------------------------------------------------------

Oil and  Gas - Integrated -- 2.5%
- -------------------------------------------------------------------------
Exxon Corp.                               87,280            $  5,340,445
Mobil Corp.                               40,000               2,887,500
- -------------------------------------------------------------------------
                                                            $  8,227,945
- -------------------------------------------------------------------------

Paper and Forest Products -- 0.8%
- -------------------------------------------------------------------------
Plum Creek Timber Co., L.P.               90,000            $  2,716,875
- -------------------------------------------------------------------------
                                                            $  2,716,875
- -------------------------------------------------------------------------

Publishing -- 1.3%
- -------------------------------------------------------------------------
McGraw-Hill Companies, Inc.               56,500            $  4,181,000
- -------------------------------------------------------------------------
                                                            $  4,181,000
- -------------------------------------------------------------------------

REITS -- 3.5%
- -------------------------------------------------------------------------
Colonial Properties Trust                 80,000            $  2,410,000
Equity Office Properties                  10,000                 315,625
Equity Residential Properties Trust      101,400               5,127,038
Security Capital Group                     6,982                  36,656
Security Capital Industrial Trust        150,000               3,731,250
- -------------------------------------------------------------------------
                                                            $ 11,620,569
- -------------------------------------------------------------------------

Retail - Food and Drug -- 3.0%
- -------------------------------------------------------------------------
CVS Corp.                                 95,000            $  6,085,938
Safeway, Inc.*                            60,000               3,795,000
- -------------------------------------------------------------------------
                                                            $  9,880,938
- -------------------------------------------------------------------------

Retail - Specialty and Apparel -- 2.2%
- -------------------------------------------------------------------------
The Home Depot, Inc.                     120,000            $  7,064,999
- -------------------------------------------------------------------------
                                                            $  7,064,999
- -------------------------------------------------------------------------

Specialty Chemicals and Materials -- 1.9%
- -------------------------------------------------------------------------
Corning, Inc.                             80,000            $  2,970,000
Sealed Air Corp.*                         50,000               3,087,500
- -------------------------------------------------------------------------
                                                            $  6,057,500
- -------------------------------------------------------------------------

Telephone Utilities -- 1.5%
- -------------------------------------------------------------------------
Ameritech Corp.                           60,448            $  4,866,064
- -------------------------------------------------------------------------
                                                            $  4,866,064
- -------------------------------------------------------------------------

Transportation -- 1.4%
- -------------------------------------------------------------------------
Southwest Airlines, Inc.                 187,500            $  4,617,188
- -------------------------------------------------------------------------
                                                            $  4,617,188
- -------------------------------------------------------------------------

Total Common Stocks
    (identified cost $134,632,910)                          $225,815,291
- -------------------------------------------------------------------------

Convertible Preferred Stock -- 0.8%

Metals - Gold -- 0.8%
- -------------------------------------------------------------------------
Freeport McMoRan Copper& Gold,
5% Series CV                             125,000            $  2,710,938
- -------------------------------------------------------------------------
                                                            $  2,710,938
- -------------------------------------------------------------------------

Total Convertible Preferred Stock
    (identified cost $2,872,500)                            $  2,710,938
- -------------------------------------------------------------------------

                       See notes to financial statements

                                       14
<PAGE>
 
Investors Portfolio  as of December 31, 1997

PORTFOLIO OF INVESTMENTS CONT'D

Corporate Bonds -- 16.2%                             

                                         Principal
                                         Amount
Security                                 (000 Omitted)      Value
- -------------------------------------------------------------------------
Associates Corp., N.A., 5.96%, 5/15/37   $ 2,000            $  2,056,740
Bell Telephone Co., 8.35%, 12/15/30        3,000               3,737,130
Chesapeake Potomac Telephone Co.,
8.375%, 10/1/29                            2,850               3,529,127
Columbia/HCA Healthcare Corp.,
8.36%, 4/15/24                               900                 963,594
Commercial Credit Corp., 7.875%, 2/1/25    2,000               2,284,480
Connecticut Light and Power Co.,
7.875%, 10/1/24                            3,775               4,345,667
General Motors Corp., 9.45%, 11/1/11       3,000               3,719,010
Grand Metropolitan Investments Corp.,
7.45%, 4/15/35                             3,090               3,453,971  
Intermediate American Development
Bank, 8.40%, 9/1/09                        3,690               4,382,023
Intermediate American Development
Bank, 6.95%, 8/1/26                          220                 238,682
J.C. Penney, Inc., 7.40%, 4/1/37           2,050               2,245,878
Johnson Controls, Inc., 7.70%,             1,360               1,509,926
3/1/15
Lowes Cos., Inc., 7.11%, 5/15/37           3,000               3,269,430
Mead Corp., 6.84%, 3/1/37                  2,000               2,108,820
Proctor and Gamble Co., 8.00%,             3,000               3,602,610
9/1/24
Seagram (Joseph) & Sons Inc.,
9.65%, 8/15/18                             1,030               1,338,104
State Street Bank, 7.35%, 6/15/26          1,700               1,877,616
Tennessee Valley Power Authority,
5.88%, 4/1/36                              3,350               3,466,580
TRW, Inc., MTN, 9.35%, 6/4/20                900               1,148,859
Xerox Corp., 5.90%, 5/5/37                 3,000               3,071,430
Xerox Corp., 5.875%, 6/15/37               1,000               1,019,990
- -------------------------------------------------------------------------

Total Corporate Bonds
    (identified cost $50,178,347)                           $ 53,369,667
- -------------------------------------------------------------------------

U.S. Treasury Obligations -- 13.4%


                                         Principal
                                         Amount
Security                                 (000 Omitted)           Value 
- -------------------------------------------------------------------------
FHLMC, 7.95%, 5/15/20                    $   772            $    776,346
FHLMC, PAC, CMO, Series 34-C,
9.00%, 11/15/19                              318                 328,827
FHLMC, PAC, CMO, Series 41-F,
10.00%, 5/15/20                            1,801               1,993,902
FHLMC, PAC, CMO, Series 59-D,
9.70%, 1/15/16                               277                 276,660
FNMA , PAC, CMO, Series 1990 101-C,
7.50%, 5/25/19                               370                 369,336
FNMA, PAC, CMO, Series 1990 24-E,
9.00%, 3/25/20                             1,586               1,667,127
FNMA, PAC, CMO, Series 1990 82-K,
8.50%, 7/25/19                                11                  10,768
U.S. Treasury Note, 5.75%, 11/30/02       11,000              11,008,579
U.S. Treasury Note, 7.125%, 9/30/99       15,000              15,356,249
U.S. Treasury Note, 6.125%, 5/15/98        8,000               8,017,519
U.S. Treasury Note, 6.125%, 9/30/00        4,000               4,041,880
U.S. Treasury Note, 6.50%, 10/15/06          300                 314,109
- -------------------------------------------------------------------------

Total U.S. Treasury Obligations
    (identified cost $44,439,882)                           $ 44,161,302
- -------------------------------------------------------------------------

Commercial Paper -- 0.6%


                                         Principal
                                         Amount
Security                                 (000 Omitted)           Value 
- -------------------------------------------------------------------------
Associates Corp., N.A., 6.70%, 1/2/98    $ 2,102            $  2,101,609
- -------------------------------------------------------------------------

Total Commercial Paper
    (amortized cost $2,101,609)                             $  2,101,609
- -------------------------------------------------------------------------

Total Investments -- 99.5%
    (identified cost $234,225,248)                          $328,158,807
- -------------------------------------------------------------------------

Other Assets, Less Liabilities -- 0.5%                      $  1,548,435
- -------------------------------------------------------------------------


Net Assets -- 100%                                          $329,707,242
- -------------------------------------------------------------------------

ADR - American Depositary Receipt
PAC - Planned Authorization Class 
CMO - Collateralized Mortgage Obligations 
REIT - Real Estate Investment Trust 

* Non-income producing security.

                       See notes to financial statements

                                       15
<PAGE>
 
Investors Portfolio as of December 31, 1997

FINANCIAL STATEMENTS

Statement of Assets and Liabilities


As of December 31, 1997
Assets
- --------------------------------------------------------------------------------
Investments, at value (Note 1A)
    (identified cost, $234,225,248)                         $328,158,807
Cash                                                                 627
Interest and dividends receivable                              1,589,744
Tax reclaim receivable                                             4,677
Deferred organization expenses (Note 1F)                           2,113
- --------------------------------------------------------------------------------
Total assets                                                $329,755,968
- --------------------------------------------------------------------------------


Liabilities
- --------------------------------------------------------------------------------
Payable to affiliate for Trustees' fees (Note 2)            $      4,260
Accrued expenses                                                  44,466
- --------------------------------------------------------------------------------
Total liabilities                                           $     48,726
- --------------------------------------------------------------------------------
Net Assets applicable to investors' interest in Portfolio   $329,707,242
- --------------------------------------------------------------------------------


Sources of Net Assets
- --------------------------------------------------------------------------------
Net proceeds from capital contributions and withdrawals     $235,773,683
Net unrealized appreciation of investments (computed
    on the basis of identified cost)                          93,933,559
- --------------------------------------------------------------------------------
Total                                                       $329,707,242
- --------------------------------------------------------------------------------


Statement of Operations

For the Year Ended
December 31, 1997
Investment Income (Note 1B)
- --------------------------------------------------------------------------------
Dividends (net of foreign taxes, $31,939)                   $  3,858,950
Interest income                                                6,702,834
- --------------------------------------------------------------------------------
Total income                                                $ 10,561,784
- --------------------------------------------------------------------------------


Expenses
- --------------------------------------------------------------------------------
Investment adviser fee (Note 2)                             $  1,964,597
Compensation of Trustees not members of the
    Investment Adviser's organization (Note 2)                    16,887
Custodian fee                                                    159,280
Legal and accounting services                                     45,475
Amortization of organization expenses (Note 1F)                    3,661
Miscellaneous                                                      6,808
- --------------------------------------------------------------------------------
Total expenses                                              $  2,196,708
- --------------------------------------------------------------------------------

Net investment income                                       $  8,365,076
- --------------------------------------------------------------------------------


Realized and Unrealized
Gain (Loss) on Investments
- --------------------------------------------------------------------------------
Net realized gain (loss) --
    Investment transactions (identified cost basis)         $ 24,802,364
- --------------------------------------------------------------------------------
Net realized gain on investment transactions                $ 24,802,364
- --------------------------------------------------------------------------------
Change in unrealized appreciation (depreciation) --
    Investments (identified cost basis)                     $ 29,330,948
- --------------------------------------------------------------------------------
Net change in unrealized appreciation (depreciation)
    of investments                                          $ 29,330,948
- --------------------------------------------------------------------------------

Net realized and unrealized gain on investments             $ 54,133,312
- --------------------------------------------------------------------------------

Net increase in net assets from operations                  $ 62,498,388
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                      16
<PAGE>
 
Investors Portfolio as of December 31, 1997 

FINANCIAL STATEMENTS CONT'D

Statements of Changes in Net Assets



Increase (Decrease)                 Year Ended             Year Ended 
in Net Assets                       December 31, 1997      December 31, 1996
- --------------------------------------------------------------------------------
From operations --
    Net investment income                $  8,365,076          $   9,268,008
    Net realized gain on investments       24,802,364             30,748,316
    Net change in unrealized
        appreciation (depreciation)
        of investments                     29,330,948             (2,562,219) 
- --------------------------------------------------------------------------------
Net increase in net assets
    from operations                      $ 62,498,388          $  37,454,105
- --------------------------------------------------------------------------------
Capital transactions --
    Contributions                        $ 27,019,040          $  32,919,522
    Withdrawals                           (61,370,968)           (45,187,645)
- --------------------------------------------------------------------------------
Net decrease in net assets
    from capital transactions            $(34,351,928)         $ (12,268,123)
- --------------------------------------------------------------------------------


Net increase in net assets               $ 28,146,460          $  25,185,982
- --------------------------------------------------------------------------------


Net Assets
- --------------------------------------------------------------------------------
At beginning of year                     $301,560,782          $ 276,374,800
- --------------------------------------------------------------------------------
At end of year                           $329,707,242          $ 301,560,782
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                      17
<PAGE>
 
Investors Portfolio as of December 31, 1997

FINANCIAL STATEMENTS CONT'D

Supplementary Data
<TABLE> 
<CAPTION> 

                                                                 Year Ended December 31,                  Year Ended January 31,
                                                        ---------------------------------------------  ----------------------------
                                                          1997             1996            1995*          1995           1994**
- -----------------------------------------------------------------------------------------------------------------------------------

Ratios to average daily net assets
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                     <C>              <C>            <C>             <C>           <C> 
Expenses                                                    0.69%            0.70%           0.71%+         0.70%          0.69%+
Net investment income                                       2.62%            3.23%           3.83%+         4.25%          3.69%+
Portfolio Turnover                                            37%              64%             47%            28%            15%
- -----------------------------------------------------------------------------------------------------------------------------------
Average commission rate (per share)/(1)/                $ 0.0584         $ 0.0591       $      --       $     --      $      --
- -----------------------------------------------------------------------------------------------------------------------------------
Net assets, end of year (000's omitted)                 $329,707         $301,561       $ 276,375       $217,157      $ 230,334
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE> 
+    Annualized.

*    For the eleven month period ended December 31, 1995.

**   For the period from the start of business, October 28, 1993 to January 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

                                      18
<PAGE>
 
Investors Portfolio as of December 31, 1997

NOTES TO FINANCIAL STATEMENTS


1 Significant Accounting Policies
  ------------------------------------------------------------------------------
  Investors Portfolio (the "Portfolio") is registered under the Investment
  Company Act of 1940, as a diversified, open-end, management investment company
  which was organized as a trust under the laws of the State of New York in
  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 Investment Valuations -- Marketable securities, including options, that are
  listed on foreign or U.S. securities exchanges or in the NASDAQ National
  Market System are valued at closing sale prices, on the exchange where such
  securities are principally traded. Listed or unlisted investments for which
  closing sale prices are not available are valued at the mean between latest
  bid and asked prices. Debt securities (other than mortgage-backed "pass
  through" securities and short-term obligations maturing in sixty days or
  less), including listed securities and securities for which price quotations
  are available and forward contracts, will normally be valued on the basis of
  market valuations furnished by pricing services. Mortgage-backed "pass
  through" securities are valued using a matrix pricing system which takes into
  account yield differentials, anticipated prepayments and interest rates. 
  Short-term obligations and money market securities maturing in 60 days or less
  are valued at amortized cost which approximates value. Non-U.S. dollar
  denominated short-term obligations are valued at amortized cost as calculated
  in the base currency and translated to U.S. dollars at the current exchange
  rate. Investments for which valuations or market quotations are unavailable
  are valued at fair value using methods determined in good faith by or at the
  direction of the Trustees.

  B Income -- Interest income is determined on the basis of interest accrued,
  adjusted for amortization of premium or discount when required for federal
  income tax purposes. Dividend income is recorded on the ex-dividend date for
  dividends received in cash and/or securities. However, if the ex-dividend date
  has passed, certain dividends from foreign securities are recorded as the
  Portfolio is informed of the ex-dividend date. Dividend income may include
  dividends that represent returns of capital for federal income tax purposes.

  C Income Taxes -- The Portfolio has elected to be treated as a partnership for
  United States 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. Withholding taxes on foreign
  dividends and capital gains have been provided for in accordance with the
  Portfolio's understanding of the applicable countries' tax rules and rates.

  D Foreign Currency Translation -- Investment valuations, other assets, and
  liabilities initially expressed in foreign currencies are converted each
  business day into U.S. dollars based upon current exchange rates. Purchases
  and sales of foreign investment securities and income and expenses are
  converted into U.S. dollars based upon currency exchange rates prevailing on
  the respective dates of such transactions. Recognized gains or losses on
  investment transactions attributable to foreign currency rates are recorded
  for financial statement purposes as net realized gains and losses on
  investments. That portion of unrealized gains and losses on investments that
  result from fluctuations in foreign currency exchange rates are not separately
  disclosed.

  E 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.

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

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

                                      19
<PAGE>
 
Investors Portfolio as of December 31, 1997

NOTES TO FINANCIAL STATEMENTS CONT'D


  H 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 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 computed at the monthly rate of 5/96 of 1%(0.625% annually) of the
  Portfolio's average daily net assets up to $300 million and at reduced rates
  as daily net assets exceed that level. For the year ended December 31, 1997,
  the fee was equivalent to 0.61% of the Portfolio's average net assets for such
  period and amounted to $1,964,597. 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 service 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 portion of their annual fees in accordance with the terms of the
  Trustees Deferred Compensation Plan. For the year ended December 31, 1997, no
  significant amounts have been deferred.


3 Investments Transaction
  ------------------------------------------------------------------------------
  Purchases and sales of investments, other than U.S. Government securities and
  short-term obligations, aggregated $81,128,338 and $104,085,909, respectively.
  Purchases and sales of U.S. Government/agency securities aggregated
  $34,911,297 and $30,400,441, respectively.


4 Federal Income Tax Basis of Investments
  ------------------------------------------------------------------------------
  The cost and unrealized appreciation (depreciation) in the value of
  investments owned at December 31, 1997, as computed on a federal income tax
  basis, are as follows:

  Aggregate cost                                               $ 234,225,248
  ------------------------------------------------------------------------------
  Gross unrealized appreciation                                $  99,371,940
  Gross unrealized depreciation                                    5,438,381
  ------------------------------------------------------------------------------

  Net unrealized appreciation                                  $  93,933,559
  ------------------------------------------------------------------------------


5 Line of Credit
  ------------------------------------------------------------------------------
  The Portfolio participates with other portfolios and funds managed by BMR and
  EVM and its affiliates in a $100 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 Eurodollar rate or federal funds rate. In addition, a fee
  computed at an annual rate of 0.10% 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 year ended December 31, 1997.


6 Risk Associated with Foreign Investments
  ------------------------------------------------------------------------------
  Investing in securities issued by companies whose principal business
  activities are outside the United States may involve significant risks not
  present in domestic investments. For example, there is generally less publicly
  available information about foreign companies, particularly those not subject
  to the disclosure and reporting requirements of the U.S. securities laws.
  Foreign issuers are generally not bound by uniform accounting, auditing, and
  financial reporting requirements and standards of practice comparable to those
  applicable to domestic issuers. Investments in foreign securities also involve
  the risk of possible adverse changes in investment or exchange control
  regulations, expropriation or confiscatory taxation, limitation on the removal
  of funds or other assets of the Portfolio, political or financial instability
  or diplomatic and other developments which could affect such investments.
  Foreign stock markets, while growing in volume and

                                      20
<PAGE>
 
Investors Portfolio as of December 31, 1997

NOTES TO FINANCIAL STATEMENTS CONT'D


  sophistication, are generally not as developed as those in the United States,
  and securities of some foreign issuers (particularly those located in
  developing countries) may be less liquid and more volatile than securities of
  comparable U.S. companies. In general, there is less overall governmental
  supervision and regulation of foreign securities markets, broker-dealers and
  issuers than in the United States.

                                      21
<PAGE>
 
Investors Portfolio as of December 31, 1997

INDEPENDENT ACCOUNTANTS' REPORT


To the Board of Trustees and Investors
of Investors Portfolio:
- --------------------------------------------------------------------------------
We have audited the accompanying statement of assets and liabilities of
Investors Portfolio (the Portfolio), including the portfolio of investments, as
of December 31, 1997, and the related statement of operations for the year then
ended, the statement of changes in net assets for each of the two years in the
period then ended and the supplementary data for each of the two years in the
period then ended, the eleven month period ended December 31, 1995, the year
ended January 31, 1995 and for the period from October 28, 1993 (start of
business) to January 31, 1994. These financial statements and supplementary data
are the responsibility of the Portfolio's management. Our responsibility is to
express an opinion on these financial statements and supplementary data based on
our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and supplementary
data are free of material misstatement. An audit includes examining, on a test
basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities held as of
December 31, 1997 by correspondence with the custodian and brokers. An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.

In our opinion, the financial statements and supplementary data referred to
above present fairly, in all material respects, the financial position of the
Investors Portfolio as of December 31, 1997, the results of its operations for
the year then ended, the changes in its net assets for each of the two years
then ended and the supplementary data for each of the two years in the period
then ended, the eleven month period ended December 31, 1995, the year ended
January 31, 1995 and for the period from October 28, 1993 (start of business) to
January 31, 1994, in conformity with generally accepted accounting principles.

                                          COOPERS & LYBRAND L.L.P.
                                          Boston, Massachusetts
                                          February 06, 1998

                                      22
<PAGE>
 
EV Classic Investors Fund as of December 31, 1997

INVESTMENT MANAGEMENT


EV Classic Investors Fund

Officers

James B. Hawkes
President and Trustee

Edward E. Smiley, Jr.
Vice President

James L. O'Connor
Treasurer

Alan R. Dynner
Secretary

Trustees

M. Dozier Gardner
Vice Chairman, Eaton Vance
Management

Donald R. Dwight
President, Dwight Partners, Inc.

Samuel L. Hayes, III
Jacob H. Schiff Professor of Investment
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


Investors Portfolio

Officers

M. Dozier Gardner
President and Trustee

James B. Hawkes
Vice President and Trustee

Thomas E. Faust, Jr.
Vice President and
Portfolio Manager

Michael B. Terry
Vice President

James L. O'Connor
Treasurer

Alan R. Dynner
Secretary

Independent Trustees

Donald R. Dwight
President, Dwight Partners, Inc.

Samuel L. Hayes, III
Jacob H. Schiff Professor of Investment
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

                                      23
<PAGE>
 
Investment Advisor of
Investors Portfolio
Boston Management and Research
24 Federal Street
Boston, MA 02110

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

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

Independent Accountants
Coopers & Lybrand L.L.P.
One Post Office Square
Boston, MA 02109



EV Classic Investors 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.
- --------------------------------------------------------------------------------

                                                                    C-IFSRC-2/98


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