EATON VANCE MUTUAL FUNDS TRUST
N-30D, 1998-12-09
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<PAGE>
[LOGO OF EV DOOR APPEARS HERE]

          Investing                  [PHOTO OF STOCK CERTIFICATES APPEARS HERE]
          for the
          21st
          Century






Semiannual Report September 30, 1998



                                  Eaton Vance
                                  High Income
                                      Fund


[PHOTO OF PAUL REVERE APPEARS HERE]


                     Global Management-Global Distribution


[PHOTO OF BOSTON SKYLINE APPEARS HERE]
<PAGE>

Eaton Vance High Income Fund as of September 30, 1998
- --------------------------------------------------------------------------------
INVESTMENT UPDATE
- --------------------------------------------------------------------------------

[PHOTO OF MICHAEL WEILHEIMER APPEARS HERE]

MICHAEL W. WEILHEIMER,
PORTFOLIO MANAGER

Investment Environment 
- -----------------------------
 .  The six-month period was marked by extraordinary volatility, as Asian
   weakness, signs of a slowing domestic economy, and weaker corporate profits
   dragged the high-yield market lower. In a preemptive strike, the Federal
   Reserve twice lowered interest rates. Ten-year Treasury bond yields declined
   from 5.7% at March 31, 1998 to around 4.4% by September 30, 1998.

 .  Reflecting a "flight to quality," the high-yield bond market underperformed
   the investment-grade bond market. The Lehman Brothers High-Yield Bond Index
   posted a return of -3.5%, while the Lehman Brothers Government/Corporate Bond
   Index returned 7.7%./1/

 .  Despite a dramatic decline in new issuance late in the period, the high-yield
   market has continued to expand in 1998. Market capitalization totaled
   approximately $600 billion at September 30, 1998.

The Fund
- -----------------------------
   Performance for the Past Six Months

 .  During the six months ended September 30, 1998, the Fund's Class B shares had
   a total return of -7.0%. This return resulted from a decline in net asset
   value (NAV) to $7.16 per share on September 30, 1998 from $8.03 on March 31,
   1998 and the reinvestment of $0.329 in dividends./2/

 .  The Fund's Class C shares had a total return of -7.1% during the period, the
   result of a decline in NAV to $9.41 per share from $10.56 per share and the
   reinvestment of $0.432 in dividends./2/ * Based on the Fund's most recent
   dividends and NAVs on September 30, 1998 of $7.16 per share for Class B and
   $9.41 for Class C, the distribution rates were 9.29% and 9.25%,
   respectively./3/ The SEC30-day yields for Class B and C shares at September
   30 were 9.13% and 9.08%, respectively./4/

   Recent Portfolio Developments

 .  For their risk-adjusted performance through September 30, 1998 the Fund's C
   shares earned a Four-Star Overall Morningstar/TM/ Rating among 1491 taxable
   bond funds/5/ - a nationally recognized monitor of mutual fund performance.

 .  Communications and cable companies were the Portfolio's largest industry
   weightings at September 30, 1998. These are areas of the economy that
   typically generate strong cash flow even as overall economic activity is
   slowing. The Portfolio also had an exposure to food packaging and retailing
   companies, which are also relatively recession-resistant.

 .  Foreign companies played an increasing role in the Portfolio's
   telecom-related holdings. Esprit Telecom Group PLC is building a strong
   customer base and network in the European market. Another large holding,
   London-based Telewest PLC is partially owned by U.S. West. The company is
   increasing its profile in the valuable London market, where its primary
   competitor is British Telecom.

 .  The Portfolio found some promising opportunities among operators of movie
   theaters, including Regal Cinemas, Inc., Cinemark USA, Inc., and Cineplex
   Entertainment. The industry has enjoyed record box office receipts in recent
   years and strong demand has helped fuel theater expansion. The theater
   industry has tended to be less affected by a slower economy, an attractive
   quality in an uncertain environment.

 .  Among the Portfolio's food-related holdings were companies that produce
   household favorites, including Del Monte Corp. and International Home Foods,
   which makes Gulden's Mustard and Chef Boyardee products. Among food
   retailers, New England-based Star Market Co. has been especially successful
   in targeting new store locations. Star's new products and services have
   contributed to strong revenue growth.

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

- --------------------------------------------------------------------------------
Fund Information 
as of September 30, 1998

Performance/6/                                         Class B          Class C
- --------------------------------------------------------------------------------
Average Annual Total Returns (at net asset value)
- --------------------------------------------------------------------------------
One Year                                                   0.0            -0.2%
Five Years                                                 8.6             N.A.
Ten Years                                                  8.8             N.A.
Life of Fund+                                              8.9             8.5

SEC Average Annual Total Returns (including sales charge or applicable CDSC)
- --------------------------------------------------------------------------------
One Year                                                  -4.6%           -1.0%
Five Years                                                 8.3             N.A.
Ten Years                                                  8.8             N.A.
Life of Fund+                                              8.9             8.5

Ten Largest Holdings/7/
- --------------------------------------------------------------------------------

Nextel Communications                                                      2.6%
Allegiance Telecommunications Corp.                                        2.2
Esprit Telecommunications Group PLC                                        2.0
Echostar Corp.                                                             1.8
Nextlink Communications Corp.                                              1.6
Allied Waste North America                                                 1.6
Hyperion Telecommunications, Inc.                                          1.5
CSCHoldings, Inc.                                                          1.5
Level 3 Communications Corp.                                               1.4
Telewest Communications Corp.                                              1.4

/1/It is not possible to invest directly in an Index. /2/Return does not reflect
applicable contingent deferred sales charge (CDSC). /3/The Fund's distribution
rate represents actual distributions paid to shareholders and is calculated by
dividing the last distribution per share (annualized) by the net asset value. 
/4/The Fund's SEC yield is calculated by dividing the net investment income per
share for the 30-day period by the offering price at the end of the period and
annualizing the result. /5/Morningstar ratings reflect historical risk-adjusted
performance through 9/30/98 and are subject to change every month. Past
performance is no guarantee of future results. Funds are assigned ratings from 1
star (lowest) to 5 stars (highest). Ratings are calculated from the funds'
3-,5-, and 10-year average annual returns (with fee adjustment) in excess of
90-day Treasury bill returns, and a risk factor that reflects fund performance
below 90-day Treasury bill returns. The top 10% of the funds in a category
receive 5 stars; the next 22.5% receive 4 stars. For the 3-year period, the Fund
was rated 4 stars (1491 funds). Rating is for Class C only; ratings for other
Class may vary. Morningstar ratings for Class B shares have been lower and
higher over selected periods. /6/Returns are calculated by determining the
percentage change in net asset value with all distributions reinvested. Class B
SEC returns reflect applicable CDSC based on following schedule: 5% - 1st year;
5% - 2nd year; 4% - 3rd year; 3% - 4th year; 2% - 5th year; 1% - 6th year. Class
C 1-year return reflects 1% CDSC. /7/Ten largest holdings represent 17.6% of the
Portfolio's investments, determined by dividing the total market value of the
holdings by the Portfolio's total investments. Holdings are subject to change.

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.

/+/Inception dates: Class B: 8/19/86; Class C: 6/8/94

                                       2
<PAGE>

Eaton Vance High Income Fund as of September 30, 1998

FINANCIAL STATEMENTS (Unaudited)

Statement of Assets and Liabilities  


As of September 30, 1998
Assets
- -------------------------------------------------------------------------------
Investment in High Income Portfolio, at value                                 
      (identified cost, $693,603,327)                          $   654,617,748
Receivable for Fund shares sold                                      1,162,490
- -------------------------------------------------------------------------------
Total assets                                                   $   655,780,238
- -------------------------------------------------------------------------------
                                                                               
Liabilities                                                                   
- -------------------------------------------------------------------------------
Dividends payable                                              $     2,412,145
Payable for Fund shares redeemed                                     1,333,244
Payable to affiliate for Trustees' fees                                    176
Other accrued expenses                                                 464,019
- -------------------------------------------------------------------------------
Total liabilities                                              $     4,209,584
- -------------------------------------------------------------------------------
Net Assets                                                     $   651,570,654
- -------------------------------------------------------------------------------
                                                                               
Sources of Net Assets        
- -------------------------------------------------------------------------------
Paid-in capital                                                $   723,723,031
Accumulated undistributed net realized loss from Portfolio                    
     (computed on the basis of identified cost)                    (34,844,845)
Accumulated distributions in excess of net investment income         1,678,047 
Net unrealized depreciation from Portfolio (computed on the                    
     basis of identified cost)                                     (38,985,579)
- -------------------------------------------------------------------------------
Total                                                          $   651,570,654 
- -------------------------------------------------------------------------------
                                                                               
Class B Shares                                                                 
- -------------------------------------------------------------------------------
Net Assets                                                     $   611,828,034 
Shares Outstanding                                                  85,448,640 
Net Asset Value, Offering Price and Redemption Price Per Share                 
     (Net assets / shares of beneficial interest outstanding)  $          7.16 
- -------------------------------------------------------------------------------

Class C Shares                                                                 
- -------------------------------------------------------------------------------
Net Assets                                                     $    39,742,620 
Shares Outstanding                                                   4,223,073 
Net Asset Value, Offering Price and Redemption Price Per Share                 
     (Net assets / shares of beneficial interest 
     outstanding)                                              $          9.41 
- -------------------------------------------------------------------------------
                                                                               
                                                                               
Statement of Operations                                                        
                                                                               
                                                                               
For the Six Months Ended                                                       
September 30, 1998                                                             
Investment Income                                                              
- -------------------------------------------------------------------------------
Interest allocated from Portfolio                              $    34,064,411 
Dividends allocated from Portfolio                                   2,622,709 
Miscellaneous income allocated from Portfolio                          405,120 
Expenses allocated from Portfolio                                   (2,286,303)
- -------------------------------------------------------------------------------
Net investment income from Portfolio                           $    34,805,937 
- -------------------------------------------------------------------------------
                                                                               
Expenses                                                                       
- -------------------------------------------------------------------------------
Trustees fees and expenses                                     $         2,082 
Custodian fee                                                           17,862 
Distribution and service fees                                                  
     Class B                                                         3,230,261 
     Class C                                                           191,571 
Transfer and dividend disbursing agent fees                            435,633 
Registration fees                                                       36,246 
Printing and postage                                                    22,951 
Legal and accounting services                                            9,660 
Amortization of organization expenses                                    3,363 
Miscellaneous                                                           27,466 
- -------------------------------------------------------------------------------
Total expenses                                                 $     3,977,095 
- -------------------------------------------------------------------------------
                                                                               
Net investment income                                          $    30,828,842 
- -------------------------------------------------------------------------------
                                                                               
Realized and Unrealized                                                        
Gain (Loss) from Portfolio                                                     
- -------------------------------------------------------------------------------
Net realized gain (loss) --                                                    
     Investment transactions (identified cost basis)           $     2,602,083 
     Foreign currency transactions                                       3,331 
- -------------------------------------------------------------------------------
Net realized gain                                              $     2,605,414 
- -------------------------------------------------------------------------------
Change in unrealized appreciation (depreciation) --                            
     Investments                                               $   (83,067,456)
- -------------------------------------------------------------------------------
Net change in unrealized appreciation (depreciation)           $   (83,067,456)
- -------------------------------------------------------------------------------
                                                                               
Net realized and unrealized loss                               $   (80,462,042)
- -------------------------------------------------------------------------------
                                                                               
Net decrease in net assets from operations                     $   (49,633,200)
- -------------------------------------------------------------------------------

                       See notes to financial statements

                                       3
<PAGE>

Eaton Vance High Income Fund  as of September 30, 1998

FINANCIAL STATEMENTS CONT'D

Statements of Changes in Net Assets


                                        Six Months Ended
Increase (Decrease)                     September 30, 1998        Year Ended
in Net Assets                           (Unaudited)               March 31, 1998
- --------------------------------------------------------------------------------
From operations --                                                              
     Net investment income                   $  30,828,842        $  55,767,094 
     Net realized gain                           2,605,414           33,998,876 
     Net change in unrealized                                                   
         appreciation (depreciation)           (83,067,456)          31,499,701
- --------------------------------------------------------------------------------
Net increase (decrease) in net                                                  
     assets from operations                  $ (49,633,200)       $ 121,265,671 
- --------------------------------------------------------------------------------
Distributions to shareholders --                                                
     From net investment income                                                 
         Class B                             $ (28,447,013)       $ (52,767,916)
         Class C                                (1,613,995)                 --  
- --------------------------------------------------------------------------------
Total distributions to shareholders          $ (30,061,008)       $ (52,767,916)
- --------------------------------------------------------------------------------
Transactions in shares of                                                       
     beneficial interest  --                                                    
     Proceeds from sale of shares                                               
         Class B                             $  70,896,688        $ 134,879,881 
         Class C                                21,385,705                  --  
     Issued in reorganization of EV                                             
         Classic High Income Fund                                               
         Class C                                33,094,017                  --  
     Net asset value of shares                                                  
         issued to shareholders in                                              
         payment of distributions                                               
         declared                                                               
         Class B                                 9,209,061           16,511,135 
         Class C                                 1,031,611                   -- 
     Cost of shares redeemed                                                    
         Class B                               (87,088,619)        (124,344,122)
         Class C                               (11,081,212)                  -- 
- --------------------------------------------------------------------------------
Net increase in net assets from                                                 
     Fund share transactions                 $  37,447,251        $  27,046,894 
- --------------------------------------------------------------------------------
                                                                                
Net increase (decrease) in net assets        $ (42,246,957)       $  95,544,649 
- --------------------------------------------------------------------------------
                                                                                
Net Assets                                                                      
- --------------------------------------------------------------------------------
At beginning of period                       $ 693,817,611        $ 598,272,962 
- --------------------------------------------------------------------------------
At end of period                             $ 651,570,654        $ 693,817,611 
- --------------------------------------------------------------------------------

                                                                                
Accumulated                                                                     
distributions in excess of                                                      
net investment income                                                           
included in net assets                                                          
- --------------------------------------------------------------------------------
At end of period                             $   1,678,047        $     910,213 
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                       4
<PAGE>

Eaton Vance High Income Fund  as of September 30, 1998

FINANCIAL STATEMENTS CONT'D

Financial Highlights


<TABLE> 
<CAPTION> 
                                                               Six Months Ended                     Year Ended March 31,
                                                               September 30, 1998           -------------------------------------
                                                               (Unaudited)                     1998        1997         1996     
                                                           --------------------------       -------------------------------------
                                                            Class B          Class C         Class B     Class B       Class B   
- ---------------------------------------------------------------------------------------------------------------------------------
<S>                                                        <C>              <C>             <C>         <C>          <C> 
Net asset value -- Beginning of period                     $    8.030       $  10.560       $    7.220  $    7.100   $    6.920  
- ---------------------------------------------------------------------------------------------------------------------------------


Income from operations
- ---------------------------------------------------------------------------------------------------------------------------------
Net investment income                                      $    0.339       $   0.449       $    0.658  $    0.652   $    0.665  
Net realized and unrealized gain (loss)                        (0.878)         (1.167)           0.774       0.120        0.189  
- ---------------------------------------------------------------------------------------------------------------------------------
Total income (loss) from operations                        $   (0.539)      $  (0.718)      $    1.432  $    0.772   $    0.854  
- ---------------------------------------------------------------------------------------------------------------------------------


Less distributions
- ---------------------------------------------------------------------------------------------------------------------------------
From net investment income                                 $   (0.331)      $  (0.432)      $   (0.622) $   (0.646)  $   (0.665) 
In excess of net investment income                                 --              --               --      (0.006)      (0.009) 
- ---------------------------------------------------------------------------------------------------------------------------------
Total distributions                                        $   (0.331)      $  (0.432)      $   (0.622) $   (0.652)  $   (0.674) 
- ---------------------------------------------------------------------------------------------------------------------------------

Net asset value-- End of period                            $    7.160       $   9.410       $    8.030  $    7.220   $    7.100  
- ---------------------------------------------------------------------------------------------------------------------------------

Total Return /(1)/                                              (6.99)%         (7.05)%          20.59%      11.37%       12.80% 
- ---------------------------------------------------------------------------------------------------------------------------------

Ratios/Supplemental Data
- ---------------------------------------------------------------------------------------------------------------------------------
Net assets, end of period (000's omitted)                  $  611,828       $  39,743       $  693,818  $  598,273   $  496,966  
Ratios (As a percentage of average daily net assets):
     Expenses /(2)/                                              1.76%/(3)/      1.80%/(3)/       1.73%       1.77%        1.78% 
     Net investment income                                       8.67%/(3)/      8.74%/(3)/       8.58%       8.97%        9.38% 
Portfolio Turnover /(4)/                                           --              --               --          --           --  
- ---------------------------------------------------------------------------------------------------------------------------------
<CAPTION> 

                                                                    Year Ended March 31,
                                                                -----------------------------   
                                                                   1995              1994   
                                                                ----------------------------- 
                                                                 Class B           Class B   
- ---------------------------------------------------------------------------------------------
<S>                                                             <C>              <C> 
Net asset value -- Beginning of period                          $    7.450       $    7.480  
- ---------------------------------------------------------------------------------------------


Income from operations                                                                       
- ---------------------------------------------------------------------------------------------
Net investment income                                           $    0.671       $    0.697  
- ---------------------------------------------------------------------------------------------
Net realized and unrealized gain (loss)                             (0.507)           0.047  
- ---------------------------------------------------------------------------------------------
Total income (loss) from operations                             $    0.164       $    0.744  
- ---------------------------------------------------------------------------------------------


Less distributions                                                                           
- ---------------------------------------------------------------------------------------------
From net investment income                                      $   (0.671)      $   (0.697)
In excess of net investment income                                  (0.023)          (0.077)
- ---------------------------------------------------------------------------------------------
Total distributions                                             $   (0.694)      $   (0.774)
- ---------------------------------------------------------------------------------------------

Net asset value -- End of period                                $    6.920       $    7.450  
- ---------------------------------------------------------------------------------------------

Total Return /(1)/                                                    2.51%           10.28 %
- ---------------------------------------------------------------------------------------------

Ratios/Supplemental Data                                                                     
- ---------------------------------------------------------------------------------------------
Net assets, end of period (000's omitted)                       $  439,171       $  399,259  
Ratios (As a percentage of average daily net assets):                                        
     Expenses /(2)/                                                   1.78%            1.82 %
     Net investment income                                            9.52%            9.09 %
Portfolio Turnover /(4)/                                                11%              96 %
- ---------------------------------------------------------------------------------------------
</TABLE> 

/(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
      reinvested at the net asset value on the reinvestment date. Total return
      is not computed on an annualized basis.
/(2)/ Includes the Fund's share of its Portfolio's allocated expenses for the 
      period the Fund was investing in the Portfolio.
/(3)/ Annualized.
/(4)/ Portfolio Turnover represents the rate of portfolio activity for the 
      period while the Fund was making investments directly in securities. The
      portfolio turnover rate for the period since the Fund transferred all of
      its investable assets to the Portfolio is shown in the Portfolio's
      financial statements which are included elsewhere in this report.

                       See notes to financial statements

                                       5
<PAGE>
 
Eaton Vance High Income Fund as of September 30, 1998 

NOTES TO FINANCIAL STATEMENTS (Unaudited) 


1   Significant Accounting Policies
    ----------------------------------------------------------------------------
    Eaton Vance High Income Fund (the Fund) is a diversified series of Eaton
    Vance Mutual Funds 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 offers two classes of shares. Class B shares
    and Class C shares are sold at net asset value and are subject to a
    contingent deferred sales charge (see Note 6). All classes of shares have
    equal rights to assets and voting privileges. Realized and unrealized gains
    and losses and net investment income, other than class specific expenses,
    are allocated daily to each class of shares based on the relative net assets
    of each class to the total net assets of the Fund. Each class of shares
    differs in its distribution plan and certain other class specific expenses.
    The Fund invests all of its investable assets in interests in the High
    Income 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 (72.6% at September 30, 1998). The performance of the Fund is
    directly affected by the performance of the Portfolio. The financial
    statements of the Portfolio, including the portfolio of investments, are
    included elsewhere in this report and should be read in conjunction with the
    Fund's financial statements.

    The following is a summary of significant accounting policies consistently
    followed by the Fund in the preparation of its financial statements. The
    policies are in conformity with generally accepted accounting principles.

    A Investment Valuations -- 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 income, including
    any net realized gain on investments. Accordingly, no provision for federal
    income or excise tax is necessary. At March 31, 1998, the Fund, for federal
    income tax purposes, had a capital loss carryover of $37,116,868, which will
    reduce the Fund's taxable income arising from future net realized gain on
    investments, if any, to the extent permitted by the Internal Revenue Code
    and thus will reduce the amount of distributions to shareholders which would
    otherwise be necessary to relieve the Fund of any liability for federal
    income or excise tax. Such capital loss carryover will expire on March 31,
    2000 ($11,538,107), 2003 ($12,690,352), 2004 ($5,868,015) and 2005
    ($7,020,394), respectively.

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

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

    F Interim Financial Information -- The interim financial statements relating
    to September 30, 1998 and for the six-month period then ended have not been
    audited by independent certified public accountants, but in the opinion of
    the Fund's management, reflect all adjustments, consisting only of normal
    recurring adjustments, necessary for the fair presentation of the financial
    statements.

2   Distributions to Shareholders
    ----------------------------------------------------------------------------
    The net income of the Fund is determined daily and substantially all of the
    net income so determined is declared as a dividend to shareholders of record
    at the time of declaration. Such daily dividends will be paid monthly.
    Distributions of realized capital gains, if any, are made at least annually.
    Shareholders may reinvest capital gain distributions in additional shares of
    the Fund at the net asset value as of the ex-dividend date. Distributions
    are paid in the form of additional shares of the Fund or, at the election of
    the shareholder, in cash. The Fund distinguishes between distributions on a
    tax basis and a financial reporting basis. Generally accepted accounting
    principles require that only distributions in excess of tax


                                       6
<PAGE>
 
Eaton Vance High Income Fund as of September 30, 1998 

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D


    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 only 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 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:

                                         Six Months Ended                      
                                         September 30, 1998       Year Ended    
    Class B                              (Unaudited)             March 31, 1998
    ----------------------------------------------------------------------------
    Sales                                         9,090,250          17,727,309
    Issued to shareholders electing 
      to receive payments of        
      distributions  in Fund shares               1,183,810           2,155,159
    Redemptions                                 (11,207,809)        (16,307,730)
    ----------------------------------------------------------------------------

    Net increase (decrease)                        (933,749)          3,574,738
    ----------------------------------------------------------------------------


                                                             Six Months Ended
    Class C                                                  September 30, 1998
    ----------------------------------------------------------------------------
     Sales                                                            2,082,248
     Issued to shareholders electing to
       receive payment of distribution in Fund shares                   101,179
     Redemptions                                                     (1,095,388)
     Issued to EV Classic High Income Fund                          
       Shareholders                                                   3,135,034
    ----------------------------------------------------------------------------

     Net increase                                                     4,223,073
    ----------------------------------------------------------------------------


4   Transactions with Affiliates
    ----------------------------------------------------------------------------
    Eaton Vance Management (EVM) serves as the administrator of the Fund, but
    receives no compensation. The Portfolio has engaged Boston Management and
    Research (BMR), a subsidiary of EVM, to render investment advisory services.
    See Note 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 organization, officers and
    Trustees receive remuneration for their services to the Fund out of such
    investment adviser fee.

    Certain of the officers and Trustees of the Fund and the Portfolio are
    officers and directors/trustees of the above organizations.
 

5   Distribution and Service Plans
    ----------------------------------------------------------------------------
    The Fund has adopted distribution plans (the Class B Plan and Class C Plan)
    pursuant to Rule 12b-1 under the Investment Company Act of 1940 for the
    Fund's Class B and Class C shares. The Plan requires the Fund to pay the
    Principal Underwriter, Eaton Vance Distributors, Inc. (EVD), amounts equal
    to 1/365 of 0.75% of the Fund's daily net assets attributable to both Class
    B and Class C shares for providing ongoing distribution services and
    facilities to the Fund. The Fund will automatically discontinue payments to
    EVD during any period in which there are no outstanding Uncovered
    Distribution Charges, which are equivalent to the sum of (i) 5% and 6.25% of
    the aggregate amount received by the Fund for the Class B and Class C shares
    sold, respectively, 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 of each respective class reduced by
    the aggregate amount of contingent deferred sales charges (see Note 6) and
    daily amounts theretofore paid to EVD by each respective class. The Fund
    paid or accrued $2,523,641 and $143,678 for Class B and Class C shares,
    respectively, to EVD for the six months ended September 30, 1998,
    representing 0.75% (annualized) of average daily net assets for Class B and
    Class C shares. At September 30, 1998 the amount of Uncovered Distribution
    Charges of EVD calculated under the Plan was approximately $16,427,000 and
    $3,076,000 for Class B and Class C shares, respectively.

    In addition, the Plans also authorize each class to make payments of service
    fees to EVD, Authorized Firms and other persons in amounts not exceeding
    0.25% of the Fund's average daily net assets attributable to Class B and
    Class C shares for each fiscal year. The Trustees have implemented the Plans
    by authorizing each class to make quarterly payments of service fees to EVD
    and Authorized Firms in amounts not to exceed 0.25% per annum of the Fund's
    average daily net assets attributable to Class B and


                                       7
<PAGE>
 
Eaton Vance High Income Fund as of September 30, 1998 

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D



    Class C shares based on the value of Fund shares sold by such persons and
    remaining outstanding for at least one year. Service fee payments for the
    six months ended September 30, 1998 amounted to $706,620 and $47,893 for
    Class B and Class C, respectively. 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 where there are no
    outstanding Uncovered Distribution Charges of EVD.

    Certain officers and Trustees of the Fund are officers or directors of EVD.

6   Contingent Deferred Sales Charge
    ----------------------------------------------------------------------------
    A contingent deferred sales charge (CDSC) is imposed on any redemption of
    Class B shares made within six years of purchase. A CDSC of 1% is imposed on
    any redemption of Class C 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. Class B CDSC is
    imposed at declining rates that begin at 5% in the case of redemptions in
    the first and second year after purchase, declining one percentage point
    each subsequent year. No CDSC is levied on shares which have been sold to
    the EVM or its affiliates or to their respective employees or clients. CDSC
    charges are paid to EVD to reduce the amount of Uncovered Distribution
    Charges calculated under the Fund's Distribution Plan. CDSC charges received
    when no Uncovered Distribution Charges exist will be retained by the Fund.
    EVD received approximately $939,000 and $4,000 of CDSC paid by shareholders
    for Class B shares and Class C shares, respectively, for the six months
    ended September 30, 1998.

7   Investment Transactions
    ----------------------------------------------------------------------------
    Increases and decreases in the Fund's investment in the Portfolio for the
    six months ended September 30, 1998, aggregated $84,657,707 and
    $114,642,412, respectively.

8   Transfer of Net Assets
    ----------------------------------------------------------------------------
    On April 1, 1998, EV Marathon High Income Fund acquired the net assets of
    the EV Classic High Income Fund pursuant to an Agreement and Plan of
    Reorganization dated June 23, 1997. In accordance with the agreement, EV
    Marathon High Income Fund, at the closing, issued 3,135,034 Class C shares
    of the Fund having an aggregate value of $33,094,017. As a result, the Fund
    issued one Class C share for each share of EV Marathon High Income Fund. The
    transaction was structured for tax purposes to qualify as a tax free
    reorganization under the Internal Revenue Code. The EV Classic High Income
    Fund's net assets at the date of the transaction were $33,094,017, including
    $1,444,205 of unrealized appreciation. Directly after the merger, the
    combined net assets of the Eaton Vance High Income Fund (formerly "EV
    Marathon High Income Fund") were $726,911,628 with a net asset value of
    $8.03 and $10.56 for Class B shares and Class C shares, respectively.

9   Name Change
    ----------------------------------------------------------------------------
    Effective April 1, 1998, EV Marathon High Income Fund changed its name to
    Eaton Vance High Income Fund.


                                       8
<PAGE>
 
High Income Portfolio as of September 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited)
(Expressed in United States Dollars)


Corporate Bonds & Notes -- 91.3%                


                                               Principal
                                               Amount
Security                                       (000's omitted)    Value
- --------------------------------------------------------------------------------
Apparel -- 2.2%
- --------------------------------------------------------------------------------
Cluett American Corp., Sr. Sub. Notes,
10.125%, 5/15/08/(1)/                          $    5,280         $  4,857,600
Glenoit Corp., Sr. Sub. Notes,
11.00%, 4/15/07                                     8,600            8,428,000
William Carter Co., Sr. Sub. Notes,
10.375%, 12/1/06                                    6,275            6,588,750
- --------------------------------------------------------------------------------
                                                                  $ 19,874,350
- --------------------------------------------------------------------------------

Auto and Parts -- 1.6%
- --------------------------------------------------------------------------------
Cambridge Industries, Inc., Sr. Sub.
Notes, 10.25%, 7/15/07                         $    2,520         $  2,368,800
Key Plastics, Inc., Sr. Notes,
14.00%, 11/15/99                                    5,500            5,940,000
Talon Automotive Group, Sr. Sub. Notes,
9.625%, 5/1/08/(1)/                                 6,100            5,764,500
- --------------------------------------------------------------------------------
                                                                  $ 14,073,300
- --------------------------------------------------------------------------------

Banks - Regional -- 0.2%
- --------------------------------------------------------------------------------
First Nationwide Holdings, Inc., Sr.
Notes, 12.50%, 4/15/03                         $    1,600         $  1,838,000
- --------------------------------------------------------------------------------
                                                                  $  1,838,000
- --------------------------------------------------------------------------------

Broadcasting and Cable -- 10.0%
- --------------------------------------------------------------------------------
Adelphia Communications Corp., Sr. Notes,
9.875%, 3/1/07                                 $    4,480         $  4,838,400
Adelphia Communications Corp., Sr. Notes,
10.50%, 7/15/04                                     2,640            2,884,200
Century Communications, Sr. Notes,
8.75%, 10/1/07                                      2,400            2,526,000
Chancellor Media Corp., Sr. Sub. Notes,
9.00%, 10/1/08/(1)/                                 7,200            7,272,000
Digital Television Services, Inc.,
Guaranteed Notes, 12.50%, 8/1/07                    6,410            6,826,650
Echostar DBS Corp., Sr. Sec. Notes,
12.50%, 7/1/02                                     11,885           12,449,537
Golden Sky Systems, Sr. Sub. Notes,
12.375%, 8/1/06/(1)/                                5,360            5,386,800
Intermedia Capital Partners, Sr. Sub.
Notes, 11.25%, 8/1/06                               2,625            2,926,875
Marcus Cable Co., Sr. Debs.,
11.875%, 10/1/05                                    2,800            2,954,000
Marcus Cable Co., Sr. Disc. Notes,
14.25%, (0% until 2000), 12/15/05                   8,500            7,926,250
NTL, Inc., Sr. Notes, 9.75%, (0%
until 2003), 4/1/08/(1)/                            3,700            2,238,500
NTL, Inc., Sr. Notes, 10.00%, 2/15/07               4,400            4,477,000
Star Choice Communications, Sr. Sec.
Notes, 13.00%, 12/15/05                               800              764,000
Telewest PLC, Debs., 9.625%, 10/1/06                6,260            6,322,600
Telewest PLC, Debs., 11.00%, (0% until
2002), 10/1/07                                      7,000            5,810,000
UIH Australia/Pacific, Inc., Sr. Disc.
Notes, Series B, 14.00%,
(0% until 2001), 5/15/06                            1,600              680,000
UIH Australia/Pacific, Inc., Sr. Disc.
Notes, Series D, 14.00%,
(0% until 2001), 5/15/06                            2,000              850,000
United International Holdings, Inc., Sr.
Disc. Notes, 10.75%, (0% until 2003),              
2/15/08                                            22,300           10,815,500
- --------------------------------------------------------------------------------
                                                                  $ 87,948,312
- --------------------------------------------------------------------------------

Business Services -- 3.7%
- --------------------------------------------------------------------------------
AP Holdings, Inc., Sr. Disc. Notes,
11.25%, (0% until 2003), 3/15/08               $    8,550         $  4,104,000
Apcoa, Inc., Sr. Sub. Notes,
9.25%, 3/15/08                                      1,200            1,086,000
Apcoa, Inc., Sr. Sub. Notes,
9.25%, 3/15/08                                      2,120            1,886,800
Federal Data Corp., Sr. Sub. Notes,
10.125%, 8/1/05                                     4,320            3,974,400
Geologistics Corp., Sr. Notes,
9.75%, 10/15/07                                     3,680            3,404,000
Intertek Finance PLC, Sr. Sub. Notes,
10.25%, 11/1/06                                     5,600            5,264,000
Spin Cycle, Inc., Sr. Disc. Notes,
12.75%,                                             3,400            1,836,000
(0% until 2001), 5/1/05/(1)/
Viasystems, Inc., Sr. Sub. Notes,
9.75%, 6/1/07                                       3,565            3,315,450
Viasystems, Inc., Sr. Sub. Notes, Series
B, 9.75%, 6/1/07                                    3,600            3,348,000
Wesco International, Inc., Sr. Disc.
Notes, 11.125%, (0% until 2003), 6/1/08             8,600            4,687,000
- --------------------------------------------------------------------------------
                                                                  $ 32,905,650
- --------------------------------------------------------------------------------

Business Services - Miscellaneous -- 5.3%
- --------------------------------------------------------------------------------
Allied Waste Industries, Inc., Sr. Disc.
Notes, 11.30%, (0% until 2002), 6/1/07         $    6,550         $  4,879,750
Allied Waste North America, Inc., Sr. Sub
Notes, LOC, 10.25%, 12/1/06                         8,200            8,979,000
Anthony Crane Rentals, Sr. Notes,
10.375%, 8/1/08/(1)/                                6,400            6,112,000
Crown Castle International Corp., Sr.
Disc. Notes, 10.625%, (0% until
2002), 11/15/07                                     5,400            3,375,000



                       See notes to financial statements

                                       9
<PAGE>
 
High Income Portfolio as of September 30, 1998 

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D 
(Expressed in United States Dollars)


                                               Principal
                                               Amount
Security                                       (000's omitted)    Value
- --------------------------------------------------------------------------------

Business Services - Miscellaneous (continued)
- --------------------------------------------------------------------------------
Pinnacle Holdings, Inc., Sr. Disc. Notes,
10.00%, (0% until 2003), 3/15/08               $    4,020         $  2,130,600
Richmont Marketing Special, Sr. Sub.
Notes, 10.125%, 12/15/07/(1)/                      10,970            9,873,000
Spectrasite Holdings, Inc., Sr. Disc.
Notes, 12.00%, (0% until 2003), 7/15/08/(1)/       12,800            6,080,000
Unisite, Inc., Sub. Notes, 13.00%, (0%
until 2000), 12/15/04/(1)/                          4,500            4,966,875
- --------------------------------------------------------------------------------
                                                                  $ 46,396,225
- --------------------------------------------------------------------------------

Chemicals -- 1.3%
- --------------------------------------------------------------------------------
Huntsman Corp., Sr. Sub. Notes,
9.50%, 7/1/07/(1)/                             $    1,000         $    965,000
NL Industries, Inc., Sr. Notes,
11.75%, 10/15/03                                    5,040            5,468,400
Sterling Chemicals Holdings, Inc., Sr.
Sub. Notes, 11.75%, 8/15/06                         6,240            5,397,600
- --------------------------------------------------------------------------------
                                                                  $ 11,831,000
- --------------------------------------------------------------------------------

Communications Equipment -- 0.6%
- --------------------------------------------------------------------------------
Jordan Telecom Products, Inc., Sr. Disc.
Notes, 11.75%, (0% until 2000), 8/1/07         $    7,700         $  5,698,000
- --------------------------------------------------------------------------------
                                                                  $  5,698,000
- --------------------------------------------------------------------------------

Computer Equipment -- 1.0%
- --------------------------------------------------------------------------------
Unisys Corp., Sr. Notes,
11.75%, 10/15/04                               $    2,600         $  2,938,000
Unisys Corp., Sr. Notes, 12.00%, 4/15/03            5,600            6,272,000
- --------------------------------------------------------------------------------
                                                                  $  9,210,000
- --------------------------------------------------------------------------------

Containers and Packaging -- 1.6%
- --------------------------------------------------------------------------------
Applied Extrusion Inc., Sr. Notes,
11.50%, 4/1/02                                 $    6,000         $  6,090,000
Consumers International, Inc., Sr. Notes,
10.25%, 4/1/05                                      3,935            4,072,725
S.D. Warren Co., Sr. Sub. Notes,
12.00%, 12/15/04                                    3,800            4,132,500
- --------------------------------------------------------------------------------
                                                                  $ 14,295,225
- --------------------------------------------------------------------------------

Electric Utilities -- 1.6%
- --------------------------------------------------------------------------------
Cal Energy Company, Inc., Sr. Notes,
9.50%, 9/15/06                                 $    5,500         $  6,130,795
Calpine Corp., Sr. Notes, 7.875%, 4/1/08            8,000            7,800,000
- --------------------------------------------------------------------------------
                                                                  $ 13,930,795
- --------------------------------------------------------------------------------

Electrical Equipment -- 0.4%
- --------------------------------------------------------------------------------
Wavetek Corp., Sr. Sub. Notes,
10.125%, 6/15/07                               $    3,360         $  3,192,000
- --------------------------------------------------------------------------------
                                                                  $  3,192,000
- --------------------------------------------------------------------------------

Engineering and Construction -- 1.4%
- --------------------------------------------------------------------------------
Level 3 Communications, Inc., Sr. Notes,
9.125%, 5/1/08                                 $   13,260         $ 12,596,999
- --------------------------------------------------------------------------------
                                                                  $ 12,596,999
- --------------------------------------------------------------------------------

Entertainment -- 4.2%
- --------------------------------------------------------------------------------
Australis Media Ltd., Sub. Disc. Notes,
15.75%, (0% until 2000), 5/15/03/(2)/          $    4,490         $     56,120
Cinemark USA, Inc., Sr. Sub. Notes,
8.50%, 8/1/08                                       6,640            6,374,400
Loews Cineplex Entertain, Sr. Sub. Notes,
8.875%, 8/1/08/(1)/                                 6,800            6,757,500
Premier Parks, Inc., Sr. Disc. Notes,
10.00%, (0% until 2003), 4/1/08                     4,800            3,012,000
Premier Parks, Inc., Sr. Notes,
9.25%, 4/1/06                                       5,600            5,551,000
Regal Cinemas, Inc., Sr. Sub. Notes,
9.50%, 6/1/08/(1)/                                  8,280            8,404,200
SFX Entertainment, Inc., Sr. Sub. Notes,
9.125%, 2/1/08                                      1,480            1,383,800
Telemundo Holdings, Inc., Sr. Disc.
Notes, 11.50%, (0% until 2003), 8/15/08/(1)/        9,800            5,194,000
- --------------------------------------------------------------------------------
                                                                  $ 36,733,020
- --------------------------------------------------------------------------------

Foods -- 3.0%
- --------------------------------------------------------------------------------
B & G Foods, Inc., Sub. Notes,
9.625%, 8/1/07                                 $    4,645         $  4,412,750
Del Monte Corp., Sr. Notes,
12.25%, 4/15/07                                     4,400            4,818,000
Del Monte Foods Co., Sr. Disc. Notes,
12.50%, (0% until 2002), 12/15/07                   5,400            3,078,000
Grupo Azucarero Mexico, Sr. Notes,
11.50%, 1/15/05                                     4,800            1,440,000
International Home Foods, Inc., Sr. Sub.
Notes, 10.375%, 11/1/06                             9,000            9,540,000
RAB Enterprises, Inc., Sr. Notes,
10.50%, 5/1/05/(1)/                                 3,840            3,628,800
- --------------------------------------------------------------------------------
                                                                  $ 26,917,550
- --------------------------------------------------------------------------------


                       See notes to financial statements

                                      10
<PAGE>
 
High Income Portfolio  as of September 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D
(Expressed in United States Dollars)


                                               Principal
                                               Amount
Security                                       (000's omitted)    Value
- --------------------------------------------------------------------------------

Health Services -- 0.6%
- --------------------------------------------------------------------------------
Dade International, Inc., Sr. Sub. Notes,
11.125%, 5/1/06                                $    4,800         $  5,184,000
- --------------------------------------------------------------------------------
                                                                  $  5,184,000
- --------------------------------------------------------------------------------

Household Products -- 2.0%
- --------------------------------------------------------------------------------
Amscan Holdings, Inc., Sr. Sub. Notes,
9.875%, 12/15/07                               $    4,480         $  4,032,000
Corning Consumer Product, Inc., Sr. Sub.
Notes, 9.625%, 5/1/08/(1)/                          2,785            2,269,775
Diamond Brands, Inc., Debs., 12.875%, (0%
until 2003), 4/15/09/(1)/                           2,800            1,176,000
Diamond Brands, Inc., Sr. Sub. Notes,
10.125%, 4/15/08/(1)/                               4,480            4,166,400
Icon Health and Fitness, Inc., Sr. Sub.
Notes, 13.00%, 7/15/02                              4,000            2,080,000
Jafra Cosmetics International, Inc., Sr.
Sub. Notes, 11.75%, 5/1/08/(1)/                     4,000            3,680,000
- --------------------------------------------------------------------------------
                                                                  $ 17,404,175
- --------------------------------------------------------------------------------

Information Services -- 3.6%
- --------------------------------------------------------------------------------
Cellnet Data Systems, Inc., Sr. Disc.
Notes, 14.00%, (0% until 2002), 10/1/07        $   10,400         $  4,160,000
Diva Systems Corp., Sr. Disc. Notes,
12.625%, (0% until 2003), 3/1/08/(1)/               6,000            2,160,000
Orbital Imaging Corp., Sr. Notes,
11.625%, 3/1/05                                     3,760            3,384,000
Psinet, Inc., Sr. Notes, 10.00%, 2/15/05            9,800            9,849,000
Splitrock Services, Inc., Sr. Notes,
11.75%, 7/15/08/(1)/                                4,000            3,660,000
Verio, Inc., Sr. Notes, 10.375%, 4/1/05             5,360            5,333,200
Verio, Inc., Sr. Notes, 13.50%, 6/15/04             3,200            3,536,000
- --------------------------------------------------------------------------------
                                                                  $ 32,082,200
- --------------------------------------------------------------------------------

Lodging and Gaming -- 5.9%
- --------------------------------------------------------------------------------
Aztar Corp., Sr. Sub. Notes,
13.75%, 10/1/04                                $    5,000         $  5,425,000
Empress Entertainment, Sr. Sub. Notes,
8.125%, 7/1/06/(1)/                                 2,000            1,990,000
Extended Stay America, Sr. Sub. Notes,
9.15%, 3/15/08                                     10,950           10,238,250
Harvey Casinos Resorts, Sr. Sub. Notes,
10.625%, 6/1/06                                     8,550            9,105,750
HMH Properties, Sr. Notes,
7.875%, 8/1/05                                      3,700            3,718,500
HMH Properties, Sr. Notes,
7.875%, 8/1/08                                      8,000            7,940,000
Horseshoe Gaming L.L.C., Sr. Sub. Notes,
9.375%, 6/15/07                                $    6,800         $  6,664,000
Showboat Marina Casino, 1st Mtg. Notes,
13.50%, 3/15/03                                     6,000            6,570,000
- --------------------------------------------------------------------------------
                                                                  $ 51,651,500
- --------------------------------------------------------------------------------

Machinery -- 0.3%
- --------------------------------------------------------------------------------
Alvey Systems, Inc., Sr. Sub. Notes,
11.375%, 1/31/03                               $    2,400         $  2,502,000
- --------------------------------------------------------------------------------
                                                                  $  2,502,000
- --------------------------------------------------------------------------------

Manufacturing -- 3.7%
- --------------------------------------------------------------------------------
GSI Group, Inc., Sr. Sub. Notes,
10.25%, 11/1/07                                $    3,680         $  3,128,000
IMO Industries, Sr. Sub. Notes,
11.75%, 5/1/06                                      4,680            5,054,400
Iron Age Corp., Sr. Sub. Notes,
9.875%, 5/1/08/(1)/                                 5,000            4,375,000
MCMS, Inc., Sr. Sub. Notes,
9.75%, 3/1/08                                       3,330            1,998,000
P & L Coal Holdings Corp., Sr. Sub.
Notes, 9.625%, 5/15/08/(1)/                         9,920            9,920,000
Roller Bearing Holdings Co., Sr. Disc.
Notes, 13.00%, (0% until 2002), 6/15/09/(1)/       12,875            7,918,125
- --------------------------------------------------------------------------------
                                                                  $ 32,393,525
- --------------------------------------------------------------------------------

Medical Products -- 0.3%
- --------------------------------------------------------------------------------
Alliance Imaging, Sr. Sub Notes,
9.625%, 12/15/05                               $    2,700         $  2,598,750
- --------------------------------------------------------------------------------
                                                                  $  2,598,750
- --------------------------------------------------------------------------------

Metals - Industrial -- 0.6%
- --------------------------------------------------------------------------------
GS Technologies Corp., Sr. Notes,
12.25%, 10/1/05                                $    5,500         $  5,005,000
- --------------------------------------------------------------------------------
                                                                  $  5,005,000
- --------------------------------------------------------------------------------

Oil and Gas - Equipment and Services -- 2.4%
- --------------------------------------------------------------------------------
Dailey International, Inc., Sr. Notes,
9.50%, 2/15/08                                 $    9,120         $  5,563,200
Grant Geophysical, Inc., Sr. Notes,
9.75%, 2/15/08                                      5,600            4,480,000
Ocean Energy, Inc., Sr. Sub. Notes,
8.875%, 7/15/07                                     1,000            1,005,000


                       See notes to financial statements

                                      11
<PAGE>
 
High Income Portfolio as of September 30, 1998 

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D 
(Expressed in United States Dollars)



                                               Principal
                                               Amount
Security                                       (000's omitted)    Value
- --------------------------------------------------------------------------------

Oil and Gas - Equipment and Services 
(continued)
- --------------------------------------------------------------------------------
Ocean Energy, Inc., Sr. Sub. Notes,
10.375%, 10/15/05                              $    3,950         $  4,167,250
Universal Compression, Inc., Sr. Disc.
Notes, 9.875%, (0% until 2003), 2/15/08/(1)/        9,400            5,546,000
- --------------------------------------------------------------------------------
                                                                  $ 20,761,450
- --------------------------------------------------------------------------------

Oil and Gas - Exploration
and Production -- 1.1%
- --------------------------------------------------------------------------------
Coho Energy, Inc., Sr. Sub. Notes,
8.875%, 10/15/07                               $    4,000         $  3,740,000
Energy Corp. of America, Sr. Sub. Notes,
9.50%, 5/15/07                                      3,600            3,258,000
United Refining Co., Sr. Notes,
10.75%, 6/15/07                                     3,200            2,624,000
- --------------------------------------------------------------------------------
                                                                  $  9,622,000
- --------------------------------------------------------------------------------

Paper and Forest Products -- 0.8%
- --------------------------------------------------------------------------------
Asia Pulp and Paper, Debs,
12.00%, 12/29/49                               $    6,000         $  3,012,660
Indah Kiat Finance Mauritius, Sr. Unsec.
Notes, 10.00%, 7/1/07                               3,400            1,479,000
Pindo Deli Finance Mauritius, Ltd.,
Guaranteed Sr. Notes, 10.75%, 10/1/07               2,400            1,056,000
Tjiwi Kimia Finance Mauritus, Ltd.,
Guaranteed Sr. Sub. Notes, 10.00%, 8/1/04           3,800            1,634,000
- --------------------------------------------------------------------------------
                                                                  $  7,181,660
- --------------------------------------------------------------------------------

Printing and Business Products -- 1.0%
- --------------------------------------------------------------------------------
MDC Communications Corp., Sr. Sub. Notes,
10.50%, 12/1/06                                $    6,600         $  6,501,000
US Office Products Co., Sr. Sub. Notes,
9.75%, 6/15/08/(1)/                                 3,000            2,520,000
- --------------------------------------------------------------------------------
                                                                  $  9,021,000
- --------------------------------------------------------------------------------

Publishing -- 1.4%
- --------------------------------------------------------------------------------
American Lawyer Media Corp., Sr. Disc.
Notes, 12.25%, (0% until 2002), 12/15/08       $    2,920         $  1,781,200
Newsquest Capital Corp., Sr. Sub. Notes,
11.00%, 5/1/06                                      4,441            5,007,228
Newsquest Capital Corp., Sr. Sub. Notes,
11.00%, 5/1/06                                        605              683,650
Von Hoffman Press, Inc., Sr. Sub Notes,
10.375%, 5/15/07/(1)/                               4,800            4,848,000
- --------------------------------------------------------------------------------
                                                                  $ 12,320,078
- --------------------------------------------------------------------------------

Retail - Food and Drug -- 2.9%
- --------------------------------------------------------------------------------
AFC Enterprises, Inc., Sr. Sub Notes,
10.25%, 5/15/07                                $    9,600         $  9,792,000
Pantry, Inc., Sr. Sub. Notes,
10.25%, 10/15/07                                    8,745            8,613,825
Star Markets Co., Sr. Sub. Notes,
13.00%, 11/1/04                                     6,200            6,804,500
- --------------------------------------------------------------------------------
                                                                  $ 25,210,325
- --------------------------------------------------------------------------------

Retail - General -- 2.8%
- --------------------------------------------------------------------------------
Advance Holding Corp., Debs., 12.875%,
(0% until 2003), 4/15/09/(1)/                  $    4,000         $  2,300,000
Advance Stores Co., Inc., Sr. Sub. Notes,
10.25%, 4/15/08/(1)/                                8,400            8,190,000
Franks Nursery and Crafts, Sr. Sub.
Notes, 10.25%, 3/1/08                               4,000            3,940,000
Kindercare Learning Ctrs., Inc., Sr. Sub.
Notes, 9.50%, 2/15/09                               8,100            7,654,500
Tuesday Morning Corp., Sr. Sub. Notes,
11.00%, 12/15/07                                    3,000            3,045,000
- --------------------------------------------------------------------------------
                                                                  $ 25,129,500
- --------------------------------------------------------------------------------

Transportation -- 0.2%
- --------------------------------------------------------------------------------
MTL, Inc., Sr. Sub. Notes, Variable
Rate, 6/15/06/(1)/                             $    1,600         $  1,520,000
- --------------------------------------------------------------------------------
                                                                  $  1,520,000
- --------------------------------------------------------------------------------

Wireless Communication Services -- 7.2%
- --------------------------------------------------------------------------------
America Mobile/ AMSC Acquisition Corp.,
Sr. Notes, 12.25%, 4/1/08                      $    4,100         $  2,480,500
Dobson Communications Corp., Sr. Notes,
11.75%, 4/15/07                                     7,830            7,869,150
Exodus Communications, Inc., Sr. Notes,
11.25%, 7/1/08/(1)/                                 6,800            6,120,000
Ionica PLC, Sr. Notes, 13.50%, 8/15/06              1,600              512,000
Millicom International Cellular, Sr. Disc
Notes, 13.50%, (0% until 2001), 6/1/06              7,200            4,644,000
Mobile Telecom Technology, Sr. Notes,
13.50%, 12/15/02                                    4,000            4,500,000
Nextel Communications, Inc., Sr. Disc.
Notes, 9.75%, (0% until 1999), 8/15/04              8,345            8,032,063
Nextel Communications, Inc., Sr. Disc.
Notes, 9.75%, (0% until 2002), 10/31/07             4,800            2,892,000


                       See notes to financial statements

                                      12
<PAGE>
 
High Income Portfolio as of September 30, 1998 

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D 
(Expressed in United States Dollars)



                                               Principal
                                               Amount
Security                                       (000's omitted)    Value
- --------------------------------------------------------------------------------

Wireless Communication Services (continued)
- --------------------------------------------------------------------------------
Nextel Communications, Inc., Sr. Disc.
Notes, 10.65%, (0% until 2002), 9/15/07        $      250         $     158,125
Nextel International, Inc., Sr. Disc.
Notes, 12.125%, (0% until 2003), 4/15/08           15,000             6,825,000
Omnipoint Corp., Sr. Notes,
11.625%, 8/15/06                                    2,580             1,612,500
Orange PLC, Sr. Notes, 8.00%, 8/1/08                1,200             1,176,000
Orion Network Systems, Inc., Sr. Disc.
Notes, 12.50%, (0% until 2002), 1/15/07             1,600             1,128,000
Orion Network Systems, Inc., Sr. Notes,
11.25%, 1/15/07                                     5,600             5,432,000
USA Mobile Communications, Sr. Notes,
9.50%, 2/1/04                                       1,500             1,350,000
Viatel, Inc., Sr. Disc. Notes, 12.50%,
(0% until 2003), 4/15/08                            5,050             2,424,000
Viatel, Inc., Sr. Notes, 11.25%, 4/15/08            7,525             6,810,125
- --------------------------------------------------------------------------------
                                                                  $  63,965,463
- --------------------------------------------------------------------------------

Wireline Communication Services -- 16.4%
- --------------------------------------------------------------------------------
Allegiance Telecom, Inc., Sr. Disc.
Notes, 11.75%, (0% until 2003), 2/15/08        $   17,125         $   7,535,000
Allegiance Telecom, Inc., Sr. Notes,
12.875%, 5/15/08                                   12,375            11,756,250
Call-Net Enterprises, Inc., Sr. Disc.
Notes, 8.94%, (0% until 2003), 8/15/08             11,720             6,856,200
Call-Net Enterprises, Inc., Sr. Notes,
8.00%, 8/15/08                                        720               684,000
Esat Telecom Group PLC, Sr. Deferred
Coupon Notes, 12.50%, (0% until 2002),              
2/1/07                                              3,875             2,480,000
Esat Telecom Group PLC, Sr. Deferred
Coupon Notes, 12.50%, (0% until 2002),              
2/1/07                                              3,600             2,304,000
Esprit Telecom Group PLC, Sr. Notes,
10.875%, 6/15/08/(1)/                               8,900             8,054,500
Esprit Telecom Group PLC, Sr. Notes,
11.50%, 12/15/07                                   10,200             9,562,500
Facilicom International, Sr. Notes,
10.50%, 1/15/08                                     4,640             4,036,800
Global Crossing Holding Ltd., Sr. Notes,
9.625%, 5/15/08/(1)/                               11,630            11,368,325
GST Telecommunications, Sr. Sub. Notes,
12.75%, 11/15/07                                    3,700             3,478,000
Hyperion Telecommunications, Inc., Sr.
Notes, 12.25%, 9/1/04                              13,100            12,936,249
Icg Holdings, Inc., Sr. Disc. Notes,
12.50%, (0% until 2001), 5/1/06                     8,755             6,281,713
Intermedia Communications, Inc., Sr.
Notes, 8.60%, 6/1/08                                7,915             7,875,425
Metronet Communications, Sr. Disc. Notes,
10.75%, (0% until 2002), 11/1/07                    4,800             2,928,000
Metronet Communications, Sr. Notes,
12.00%, 8/15/07                                     5,000             5,350,000
MGC Communications, Inc., Sr. Notes,
13.00%, 10/1/04                                     2,100             1,785,000
Netia Holdings B.V., Sr. Disc. Notes,
11.25%, (0% until 2001), 11/1/07                    1,200               492,000
Nextlink Communications, Inc., Sr. Notes,
9.625%, 10/1/07                                     6,280             6,154,400
Nextlink Communications, Inc., Sr. Notes,
12.50%, 4/15/06                                     6,720             7,274,400
Primus Telecom Group, Sr. Notes,
9.875%, 5/15/08                                     2,400             2,100,000
Primus Telecom Group, Sr. Notes,
11.75%, 8/1/04                                      4,600             4,462,000
RSL Commerce, Ltd., Sr. Notes,
12.25%, 11/15/06                                    4,565             4,724,775
SBA Communications Corp., Sr. Disc.
Notes, 12.00%, (0% until 2003), 3/1/08             11,705             6,262,175
Versatel Telecom B.V., Sr. Notes,
13.25%, 5/15/08/(1)/                                7,840             7,604,800
- --------------------------------------------------------------------------------
                                                                  $ 144,346,512
- --------------------------------------------------------------------------------

Total Corporate Bonds & Notes
     (identified cost $868,591,913)                               $ 805,339,564
- --------------------------------------------------------------------------------

Common Stocks, Warrants and 
Rights-- 0.4%

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

Broadcasting and Cable -- 0.0%
- --------------------------------------------------------------------------------
21st Century Telecom Group, Warrants/(2)//(3)/        800         $         --
Star Choice Communications, Warrants/(2)//(3)/     18,528                   --
UIH Australia/Pacific, Inc.,                        
Warrants/(2)//(3)/                                  3,600                   36
United International Holdings, Inc.,
Warrants Exp. 11/15/99/(2)//(3)/                    7,840               19,600
- --------------------------------------------------------------------------------
                                                                  $     19,636
- --------------------------------------------------------------------------------

Business Services - Miscellaneous -- 0.0%
- --------------------------------------------------------------------------------
Unisite, Inc., Warrants/(2)//(3)/                   2,252         $         --
- --------------------------------------------------------------------------------
                                                                  $         --
- --------------------------------------------------------------------------------



                       See notes to financial statements

                                      13
<PAGE>
 
High Income Portfolio  as of September 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D
(Expressed in United States Dollars)


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

Chemicals -- 0.0%
- --------------------------------------------------------------------------------
Sterling Chemicals Holdings, Common/(2)//(3)/       9,600         $    85,200
- --------------------------------------------------------------------------------
                                                                  $    85,200
- --------------------------------------------------------------------------------

Communications Equipment -- 0.0%
- --------------------------------------------------------------------------------
Jordan Telecom Products, Inc., Common/(2)//(3)/     2,500         $        --
- --------------------------------------------------------------------------------
                                                                  $        --
- --------------------------------------------------------------------------------

Foods -- 0.0%
- --------------------------------------------------------------------------------
Specialty Foods Acquisition
Corp., Common/(2)//(3)/                            48,000         $       480
- --------------------------------------------------------------------------------
                                                                  $       480
- --------------------------------------------------------------------------------

Information Services -- 0.1%
- --------------------------------------------------------------------------------
Cellnet Data Systems, Inc., Warrants
Exp. 10/1/07/(2)//(3)/                              8,000         $        80
Concentric Network Corp., Warrants/(2)//(3)/        3,200             169,184
Orbital Imaging Corp., Warrants/(2)//(3)/           3,760                  --
Verio, Inc., Warrants/(2)//(3)/                    25,600           1,003,776
- --------------------------------------------------------------------------------
                                                                  $ 1,173,040
- --------------------------------------------------------------------------------

Metals - Industrial -- 0.0%
- --------------------------------------------------------------------------------
Gulf States Steel, Warrants/(2)//(3)/               2,400         $       120
- --------------------------------------------------------------------------------
                                                                  $       120
- --------------------------------------------------------------------------------

Wireless Communication Services -- 0.1%
- --------------------------------------------------------------------------------
America Mobile, Warrants
Exp. 4/01/08/(2)//(3)/                              4,100         $        --
Loral Space and Communications
Ltd., Common/(2)//(3)/                              4,149              63,791
Microcell Telecommunication,                       58,400             782,428
Warrants/(2)//(3)/
Nextel Communications, Inc.,
Class A, Common/(2)//(3)/                          11,154             224,463
Nextel Communications, Inc., Warrants
Exp. 4/25/99/(2)//(3)/                              7,200               4,320
- --------------------------------------------------------------------------------
                                                                  $ 1,075,002
- --------------------------------------------------------------------------------

Wireline Communication Services -- 0.2%
- --------------------------------------------------------------------------------
Allegiance Telecom, Inc., Warrants
Exp. 2/15/08/(2)//(3)/                             26,555         $   289,184
Esat Holdings, Ltd., Warrants/(2)//(3)/             3,600             126,000
Hyperion Telecommunications,
Inc., Common/(2)//(3)/                             24,240             133,562
Intermedia Communications,
Inc., Common/(2)//(3)/                              6,788         $   166,926
Metronet Communications
Corp., Common/(2)//(3)/                             3,086              55,164
MGC Communications, Inc., Warrants
Exp. 10/01/04/(2)/                                  5,680             247,932
Optel, Inc., Common/(2)/                            5,840             116,800
Primus Telecom Group, Warrants
Exp. 8/1/04/(2)//(3)/                               4,600             161,000
Versatel Telecom B.V., Warrants/(2)//(3)/           7,840                  --
- --------------------------------------------------------------------------------
                                                                  $ 1,296,568
- --------------------------------------------------------------------------------

Total Common Stocks, Warrants and Rights
     (identified cost $2,381,027)                                 $ 3,650,046
- --------------------------------------------------------------------------------

Preferred Stocks-- 7.4%

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

Apparel -- 0.4%
- --------------------------------------------------------------------------------
Cluett American Corp., 12.50% (PIK)/(1)/            4,000         $  3,720,000
- --------------------------------------------------------------------------------
                                                                  $  3,720,000
- --------------------------------------------------------------------------------

Broadcasting and Cable -- 2.6%
- --------------------------------------------------------------------------------
21st Century Telecom Group, 13.75% (PIK)              829         $    663,200
Adelphia Communications Corp., 13% (PIK)           48,000            5,580,000
CSC Holdings, Inc., Series M, 11.125% (PIK)       116,881           12,915,350
Echostar Communications, 12.125% (PIK)              3,498            3,323,014
- --------------------------------------------------------------------------------
                                                                  $ 22,481,564
- --------------------------------------------------------------------------------

Business Services - Miscellaneous -- 0.2%
- --------------------------------------------------------------------------------
Unisite, Inc., 8.5% (PIK)/(3)/                      3,239         $  1,603,058
- --------------------------------------------------------------------------------
                                                                  $  1,603,058
- --------------------------------------------------------------------------------

Communications Equipment -- 0.3%
- --------------------------------------------------------------------------------
Jordan Telecom Products, Inc., 13.25% (PIK)/(1)/    2,500         $  2,875,000
- --------------------------------------------------------------------------------
                                                                  $  2,875,000
- --------------------------------------------------------------------------------

Machinery -- 0.2%
- --------------------------------------------------------------------------------
MMH Holdings, Inc., 12% (PIK)                       1,630         $  1,393,650
- --------------------------------------------------------------------------------
                                                                  $  1,393,650
- --------------------------------------------------------------------------------


                       See notes to financial statements

                                      14
<PAGE>
 
High Income Portfolio  as of September 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D
(Expressed in United States Dollars)


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

Wireless Communication Services -- 1.8%
- --------------------------------------------------------------------------------
Dobson Communications Corp., 12.25% (PIK)           4,027         $   3,624,300
E.spire Communications, Inc., 12.75% (PIK)          4,422             3,669,915
Nextel Communications, Inc., 11.125% (PIK)          5,076             4,568,400
Rural Cellular Corp., 11.375% (PIK)                 4,114             3,702,320
Viatel, Inc., 10% (PIK)                             6,273               439,110
- --------------------------------------------------------------------------------
                                                                  $  16,004,045
- --------------------------------------------------------------------------------

Wireline Communication Services -- 1.9%
- --------------------------------------------------------------------------------
Intermedia Communications, Inc., 7% (PIK)         185,000         $   4,497,813
IXC Communications, Inc., Series B,
12.5% (PIK)                                        10,770            11,470,050
Nextlink Communications, 14% (PIK)                 20,897             1,086,644
- --------------------------------------------------------------------------------
                                                                  $  17,054,507
- --------------------------------------------------------------------------------

Total Preferred Stocks
     (identified cost $67,407,932)                                $  65,131,824
- --------------------------------------------------------------------------------

Short-Term Investments -- 0.9%

                                               Principal
                                               Amount
Security                                       (000's omitted)    Value
- --------------------------------------------------------------------------------
Corporate Recreation Corp., 5.75%, 10/1/98     $    7,514         $   7,514,000
- --------------------------------------------------------------------------------

Total Short-Term Investments
     (at amortized cost $7,514,000)                               $   7,514,000
- --------------------------------------------------------------------------------

Total Investments -- 100.0%
     (identified cost $945,894,872)                               $ 881,635,434
- --------------------------------------------------------------------------------
(PIK) Payment-in-kind.
(1)  Security exempt from registration under Rule 144A of the Securities Act of
     1933. These securities may be resold in transactions exempt from
     registration, normally to qualified institutional buyers. It is the
     Portfolio's intention to hold this security until maturity.
(2)  Non-income producing security. 
(3)  Restricted security.


                       See notes to financial statements

                                      15
<PAGE>

High Income Portfolio as of September 30, 1998

FINANCIAL STATEMENTS (Unaudited)

Statement of Assets and Liabilities 


As of September 30, 1998
(Expressed in United States Dollars)
Assets
- --------------------------------------------------------------------------------
Investments, at value (identified cost,                    
    $945,894,872)                                                 $ 881,635,434
Cash                                                                      1,894
Receivable for investments sold                                         412,400
Interest and dividends receivable                                    22,428,742
Deferred organization expenses                                            2,989
- --------------------------------------------------------------------------------
Total assets                                                      $ 904,481,459
- --------------------------------------------------------------------------------


Liabilities
- --------------------------------------------------------------------------------
Payable for investments purchased                                 $   2,744,060
Payable to affiliate for Trustees' fees                                   1,040
Other accrued expenses                                                   41,011
- --------------------------------------------------------------------------------
Total liabilities                                                 $   2,786,111
- --------------------------------------------------------------------------------
Net Assets applicable to investors' interest in            
    Portfolio                                                     $ 901,695,348
- --------------------------------------------------------------------------------


Sources of Net Assets
- --------------------------------------------------------------------------------
Net proceeds from capital contributions and                
    withdrawals                                                   $ 965,954,786
Net unrealized depreciation (computed on the basis                  
    of identified cost)                                             (64,259,438)
- --------------------------------------------------------------------------------
Total                                                             $ 901,695,348
- --------------------------------------------------------------------------------


Statement of Operations

For the Six Months Ended
September 30, 1998
(Expressed in United States Dollars)
Investment Income
- --------------------------------------------------------------------------------
Interest                                                          $  46,919,855
Dividends                                                             3,929,786
Miscellaneous                                                           556,577
- --------------------------------------------------------------------------------
Total investment income                                           $  51,406,218
- --------------------------------------------------------------------------------


Expenses
- --------------------------------------------------------------------------------
Investment adviser fee                                            $   2,931,571
Trustees fees and expenses                                               12,643
Custodian fee                                                           146,395
Legal and accounting services                                            52,728
Amortization of organization expenses                                     2,265
Miscellaneous                                                             2,175
- --------------------------------------------------------------------------------
Total expenses                                                    $   3,147,777
- --------------------------------------------------------------------------------

Net investment income                                             $  48,258,441
- --------------------------------------------------------------------------------


Realized and Unrealized Gain (Loss)
- --------------------------------------------------------------------------------
Net realized gain (loss) --
    Investment transactions (identified cost basis)               $   3,257,760
    Foreign currency transactions                                         4,653
- --------------------------------------------------------------------------------
Net realized gain                                                 $   3,262,413
- --------------------------------------------------------------------------------
Change in unrealized appreciation (depreciation) --
    Investments (identified cost basis)                           $(116,235,937)
- --------------------------------------------------------------------------------
Net change in unrealized appreciation                      
    (depreciation)                                                $(116,235,937)
- --------------------------------------------------------------------------------

Net realized and unrealized loss                                  $(112,973,524)
- --------------------------------------------------------------------------------

Net decrease in net assets from operations                        $ (64,715,083)
- --------------------------------------------------------------------------------




                       See notes to financial statements

                                      16
<PAGE>


High Income Portfolio as of September 30, 1998 

FINANCIAL STATEMENTS CONT'D

Statements of Changes in Net Assets

(Expressed in United States Dollars)


                                      Six Months Ended               
Increase (Decrease)                   September 30, 1998         Year Ended
in Net Assets                         (Unaudited)                March 31, 1998
- --------------------------------------------------------------------------------
From operations --
   Net investment income                   $  48,258,441          $  78,751,905
   Net realized gain                           3,262,413             40,197,991
   Net change in unrealized 
      appreciation (depreciation)           (116,235,937)            41,198,260
- --------------------------------------------------------------------------------
Net increase (decrease) in net 
   assets from operations                  $ (64,715,083)         $ 160,148,156
- --------------------------------------------------------------------------------
 Capital transactions --
    Contributions                          $ 174,851,243          $ 306,797,835
    Withdrawals                             (168,941,522)          (213,156,743)
- --------------------------------------------------------------------------------
Net increase in net assets from
   capital transactions                    $   5,909,721          $  93,641,092
- --------------------------------------------------------------------------------

Net increase (decrease) in                               
   net assets                              $ (58,805,362)         $ 253,789,248
- --------------------------------------------------------------------------------


Net Assets
- --------------------------------------------------------------------------------
At beginning of period                     $ 960,500,710          $ 706,711,462
- --------------------------------------------------------------------------------
At end of period                           $ 901,695,348          $ 960,500,710
- --------------------------------------------------------------------------------




                       See notes to financial statements


                                      17
<PAGE>

High Income Portfolio  as of September 30, 1998

FINANCIAL STATEMENTS CONT'D
Supplementary Data
(Expressed in United States Dollars)

<TABLE> 
<CAPTION> 

                                             Six Months Ended                        Year Ended March 31,
                                             September 30, 1998     ---------------------------------------------------------
                                             (Unaudited)             1998          1997           1996          1995/(1)/
- -----------------------------------------------------------------------------------------------------------------------------
<S>                                          <C>                  <C>            <C>            <C>            <C>   
Ratios to average daily net assets                           
- -----------------------------------------------------------------------------------------------------------------------------
Expenses                                           0.64%/(2)/         0.63%          0.67%          0.71%          0.70%/(2)/
Net investment income                              9.82%/(2)/         9.63%         10.02%         10.41%         10.63%/(2)/
Portfolio Turnover                                   65%               137%            78%            88%            53%
- -----------------------------------------------------------------------------------------------------------------------------
Net assets, end of period (000's omitted)      $901,695           $960,501       $706,711       $511,347       $442,552
- -----------------------------------------------------------------------------------------------------------------------------
</TABLE> 

/(1)/ For the period from the start of business, June 1, 1994, to March 31,
      1995.
/(2)/ Annualized.


                       See notes to financial statements

                                      18

<PAGE>
 
High Income Portfolio as of September 30, 1998 
NOTES TO FINANCIAL STATEMENTS (Unaudited) 
(Expressed in United States Dollars)



1   Significant Accounting Policies
    ----------------------------------------------------------------------------
    High Income 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 on
    May 1, 1992. The Declaration of Trust permits the Trustees to issue
    interests in the Portfolio. The following is a summary of significant
    accounting policies of the Portfolio. The policies are in conformity with
    accounting principles generally accepted in the United States of America.

    A Investment Valuations -- Investments listed on securities exchanges or in
    the NASDAQ National Market are valued at closing sale prices. Listed or
    unlisted investments for which closing sale prices are not available are
    valued at the mean between the latest bid and asked prices. Fixed income
    investments (other than short-term obligations), including listed
    investments and investments for which price quotations are available, will
    normally be valued on the basis of market valuations furnished by a pricing
    service. Financial futures contracts listed on commodity exchanges are
    valued at closing settlement prices. Short-term obligations, maturing in
    sixty days or less, are valued at amortized cost, which approximates value.
    Investments for which there are no quotations or valuations 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.

    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 taxable investment income, net realized capital gains, and
    any other items of income, gain, loss, deduction or credit.

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

    E Financial Futures Contracts -- Upon the entering of a financial futures
    contract, the Portfolio is required to deposit ("initial margin") either in
    cash or securities an amount equal to a certain percentage of the purchase
    price indicated in the financial futures contract. Subsequent payments are
    made or received by the Portfolio ("margin maintenance") each day, dependent
    on the daily fluctuations in the value of the underlying security, and are
    recorded for book purposes as unrealized gains or losses by the Portfolio.
    The Portfolio's investment in financial futures contracts is designed only
    to hedge against anticipated future changes in interest rates. Should
    interest rates move unexpectedly, the Portfolio may not achieve the
    anticipated benefits of the financial futures contracts and may realize a
    loss.

    F Use of Estimates -- The preparation of financial statements in conformity
    with accounting principles generally accepted in the United States of
    America 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.

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

    H Interim Financial Information -- The interim financial statements relating
    to September 30, 1998 and for the six-month period then ended have not been
    audited by independent certified public accountants, but in the opinion of
    the Fund's management, reflect all adjustments, consisting only of normal
    recurring adjustments, necessary for the fair presentation of the financial
    statements.

                                      19
<PAGE>
 
High Income Portfolio as of September 30, 1998 
NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D
(Expressed in United States Dollars)



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 based upon a percentage of average daily net assets
    plus a percentage of gross income (i.e., income other than gains from the
    sale of securities). For the six months ended September 30, 1998, the fee
    was equivalent to 0.60% (annualized) of the Portfolio's average daily net
    assets and amounted to $2,931,571. Except as to Trustees of the Portfolio
    who are not members of EVM's or BMR's organization, officers and Trustees
    receive remuneration for their services to the Portfolio out of such
    investment adviser fee. Certain of the officers and Trustees of the
    Portfolio are officers and directors/trustees of the above organizations.
    Trustees of the Portfolio that are not affiliated with the Investment
    Adviser may elect to defer receipt of all or a portion of their annual fees
    in accordance with the terms of the Trustees Deferred Compensation Plan. For
    the six months ended September 30, 1998, no significant amounts have been
    deferred.

3   Investments
    ----------------------------------------------------------------------------
    The Portfolio invests primarily in debt securities. The ability of the
    issuers of the debt securities held by the Portfolio to meet their
    obligations may be affected by economic developments in a specific industry.
    Purchases and sales of investments, other than U.S. Government securities
    and short-term obligations, aggregated $635,779,620 and $607,445,913,
    respectively, for the six months ended September 30, 1998.

4   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 either 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 six months ended
    September 30, 1998.

5   Federal Income Tax Basis of Investments
    ----------------------------------------------------------------------------
    The cost and unrealized appreciation/depreciation in value of the
    investments owned at September 30, 1998, as computed on a federal income tax
    basis, were as follows: 

    Aggregate cost                                           $   945,894,872
    ----------------------------------------------------------------------------
    Gross unrealized appreciation                            $    79,222,579

    Gross unrealized depreciation                               (143,482,017)
    ----------------------------------------------------------------------------
    Net unrealized depreciation                              $   (64,259,438)
    ----------------------------------------------------------------------------

6   Restricted Securities
    ----------------------------------------------------------------------------
    At September 30, 1998, the Portfolio owned the following securities
    (constituting 0.54% of net assets) which were restricted as to public resale
    and not registered under the Securities Act of 1933 (excluding Rule 144A
    Securities). The Portfolio has various registration rights (exercisable
    under a variety of circumstances) with respect to certain of these
    securities. The fair value of these securities is determined based on
    valuations provided by brokers when available, or if not available, they are
    valued at fair value using methods determined in good faith by or at the
    direction of the Trustees.


                                Date of
    Description               Acquisition  Shares/Face    Cost     Fair Value
    ----------------------------------------------------------------------------

    Common Stocks, Warrants, and Rights
    ----------------------------------------------------------------------------
    Allegiance Telecom, Inc.,
      Wts., Exp. 2/15/08            1/29/98      26,555  $        0  $  289,184
    America Mobile, Wts.,           3/26/98       4,100           0           0
      Exp. 4/1/08            
    Cellnet Data Systems, Inc.,    
      Wts., Exp. 10/1/07            9/24/98       8,000           0          80
    Concentric Network      
      Corp., Wts.                   7/16/98       3,200           0     169,184
    Esat Holdings, Ltd., Wts.       6/19/97       3,600           0     126,000
    Gulf States Steel, Wts.         8/22/95       2,400           0         120
    Hyperion                 
      Telecommunications,    
      Inc., Common                  6/24/98      24,240          75     133,562
    Intermedia Communications,      
      Inc., Common                  5/21/98       6,788     231,907     166,926
    Jordan Telecom Products,         
      Inc., Common                   1/9/98       2,500           0           0

                                      20
<PAGE>
 
High Income Portfolio as of September 30, 1998

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D
(Expressed in United States Dollars)


                                 Date of
    Description                  Acquisition  Shares/Face    Cost    Fair Value
    ----------------------------------------------------------------------------

    Common Stocks, Warrants, and Rights (continued)
    ----------------------------------------------------------------------------
    Loral Space &
      Communications
      Ltd., Common                  6/23/98       4,149  $      101  $   63,791
    Metronet Communications,
      Common                        6/04/98       3,086          36      55,164
    Microcell Telecommunication,              
      Wts.                         10/30/96      58,400     647,700     782,428
    Nextel Communications, 
      Inc., Common                  8/25/98      11,154     180,000     224,463
    Nextel Communications, Inc.,
      Wts., Exp.4/25/99            10/04/96       7,200           0       4,320
    Orbital Imaging Corp., Wts.     5/28/98       3,760           0           0
    Primus Telecommunications,  
      Wts., Exp. 8/1/04             5/14/98       4,600           0     161,000
    Specialty Foods Acq.   
      Corp., Common                 8/10/93      48,000      34,886         480
    Star Choice            
      Communication, Wts.           4/29/98      18,528           0           0
    Sterling Chemicals     
      Hldgs., Inc., Common         10/07/96       9,600          96      85,200
    21st Century Telecom   
      Grp., Wts.                    2/02/98         800           0           0
    UIH Australia/Pacific, 
      Inc., Wts.                    2/05/98       3,600           0          36
    Unisite, Inc., Wts.             12/9/97       2,252           0           0
    United International Holdings,  
      Inc., Wts.,
      Exp. 11/15/99                11/16/94       7,840     222,186      19,600
    Verio, Inc., Wts.                5/5/98      25,600   1,064,000   1,003,776
    Versatel Telecom B.V., Wts.     5/20/98       7,840           0           0
    ----------------------------------------------------------------------------
                                                         $2,380,987  $3,285,314

    Preferred Stock      
    ----------------------------------------------------------------------------
    Unisite, Inc., 8.5% (PIK)       12/9/97       3,239   1,499,847   1,603,058
    ----------------------------------------------------------------------------
                                                         $3,880,834  $4,888,372
    ----------------------------------------------------------------------------


                                      21
<PAGE>
 
Eaton Vance High Income Fund as of September 30, 1998

INVESTMENT MANAGEMENT

<TABLE> 

Eaton Vance High Income Fund
<S>          <C>                             <C> 
             Officers                        Independent Trustees            
             M. Dozier Gardner               Donald R. Dwight                
             President and Trustee           President, Dwight Partners, Inc. 
                                
             James B. Hawkes                 Samuel L. Hayes, III                          
             Vice President and Trustee      Jacob H. Schiff Professor of Investment       
                                             Banking, Harvard University Graduate School of
             William H. Ahern, Jr.           Business Administration                        
             Vice President                  
                                             Norton H. Reamer                                   
             Thomas J. Fetter                Chairman and Chief Executive Officer, United Asset 
             Vice President                  Management Corporation                              
                                
             Robert B. MacIntosh             John L. Thorndike                                  
             Vice President                  Formerly Director, Fiduciary Company Incorporated  
                                                                                                
             Michael B. Terry                Jack L. Treynor                                    
             Vice President                  Investment Adviser and Consultant                   

             James L. O'Connor
             Treasurer

             Alan R. Dynner
             Secretary

High Income Portfolio

             Officers                        Independent Trustees                                
             M. Dozier Gardner               Donald R. Dwight                                    
             President and Trustee           President, Dwight Partners, Inc.                    
                                                                                    
             James B. Hawkes                 Samuel L. Hayes, III                                
             Vice President and Trustee      Jacob H. Schiff Professor of Investment             
                                             Banking, Harvard University Graduate School of      
             Michael W. Weilheimer           Business Administration                             
             Vice President and                                                                  
             Portfolio Manager               Norton H. Reamer                                    
                                             Chairman and Chief Executive Officer, United Asset  
             Raymond O'Neill                 Management Corporation                              
             Vice President                                                                      
                                             John L. Thorndike                                   
             Michel Normandeau               Formerly Director, Fiduciary Company Incorporated   
             Vice President                                                                      
                                             Jack L. Treynor                                     
             James L. O'Connor               Investment Adviser and Consultant                    
             Treasurer                     
                                       
             Alan R. Dynner                
             Secretary                     
</TABLE> 
                                                     
                                      22
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Investment Advisor of High Income Portfolio
Boston Management and Research
24 Federal Street
Boston, MA 02110


Administrator of Eaton Vance High Income Fund
Eaton Vance Management
24 Federal Street
Boston, MA 02110


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


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


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






Eaton Vance High Income Fund
24 Federal Street
Boston, MA 02110




- --------------------------------------------------------------------------------
This report must be preceded or accompanied by a current prospectus which
contains more complete information on the Fund, including its distribution plan,
sales charges and expenses. Please read the prospectus carefully before you
invest or send money.
- --------------------------------------------------------------------------------
                                                                     HISRC-11/98


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