EATON VANCE INCOME FUND OF BOSTON
N-30D, 1999-11-23
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<PAGE>

[LOGO]  INVESTING
        FOR THE
        21st
        CENTURY-COPYRIGHT MARK-



ANNUAL REPORT SEPTEMBER 30, 1999
[PICTURE OF HORSE]


        EATON VANCE
        INCOME FUND
          OF BOSTON



      GLOBAL MANAGEMENT-GLOBAL DISTRIBUTION
[PICTURE OF BOSTON]

<PAGE>

EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999>
LETTER TO SHAREHOLDERS

[PICTURE]        Eaton Vance Income Fund of Boston Class A shares had a
                 total return of 11.97% for the year ended September 30,
                 1999.(1) That return was the result of an increase in
James B. Hawkes  net asset value per share from $8.03 on September 30,
President        1998 to $8.16 on September 30, 1999, and the reinvestment
                 of $0.807 in dividends.

The Fund's Class I shares had a total return of -0.44%. That return was the
result of a decline in NAV from $10.00 at inception on July 1, 1999 to $9.71
on September 30, 1999, and the reinvestment of $0.247 in dividends.

Based on the Fund's most recent distributions and NAVs of $8.16 for Class A
and $9.71 for Class I, Class A and Class I had distribution rates of 10.02%
and 10.20%, respectively, on September 30, 1999.(2) The Class A and Class I
30-day SEC yields were 9.26% and 9.88%, respectively, at September 30,
1999.(3)


After last year's crisis, the high-yield market mounted a strong recovery
amid improving fundamentals...

Like most fixed-income markets, the high-yield bond market felt the impact of
last fall's Asian crisis, as weaker demand and a flight to quality drove many
investors to Treasury bonds. However, the high-yield segment demonstrated its
resilience later in the fiscal year, as the U.S. economy was strong. While
higher-quality bonds felt the pressure of rising rates, the high-yield sector
rallied strongly in response to better underlying fundamentals.

Income Fund of Boston again outperformed its peer group...

In a volatile year for high-yield bonds, Income Fund of Boston's Class A
shares far outperformed the average 4.84% return of its High Yield Fund peer
group, according to Lipper, Inc., a nationally recognized monitor of mutual
fund performance.(4) The Fund's long-term performance has been equally
impressive. For the five-year period ended September 30, 1999, the Fund's
Class A shares ranked 3rd of 101 funds in the High Yield Fund category.(4)

The coming year is likely to present exciting new opportunities for
high-yield investors...

The high-yield market has made remarkable strides in the past decade. As we
look ahead to the year 2000, high-yield bonds will continue to play a central
role in capital formation for growing companies, provide financial support
for entrepreneurs and spur economic growth. For high-yield investors, the
1990s have proven a volatile but rewarding period and we believe the stage is
set for many more opportunities. In the pages that follow, portfolio manager
Michael Weilheimer reviews the past year in the high-yield markets and offers
his outlook as we look ahead to the year 2000.

                                           Sincerely,

                                           James B. Hawkes
                                           President
                                           November 9, 1999

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

Fund Information
as of September 30, 1999

<TABLE>
<CAPTION>

<S>                                                        <C>            <C>
Performance(5)                                             Class A       Class I
- ---------------------------------------------------------------------------------
Average Annual Total Returns (at net asset value)
- ---------------------------------------------------------------------------------
One Year                                                   11.97%          N.A.
Five Years                                                 10.91           N.A.
Ten Years                                                  10.59           N.A.
Life of Fund+                                              10.11          -0.44%++

SEC Average Annual Total Returns (including sales charge)
- ----------------------------------------------------------------------------------
One Year                                                   6.66%           N.A.
Five Years                                                 9.85            N.A.
Ten Years                                                 10.05            N.A.
Life of Fund+                                              9.92           -0.44%++

 + Inception dates: Class A: 6/15/72; Class I: 7/1/99
++ Returns for Class I are cumulative total returns.

Ten Largest Holdings(6)
- ----------------------------------------------------------------------------------
Versatel Telecom B.V.                                      2.4%
Telewest Communications PLC                                2.3
PSINet, Inc.                                               2.2
Nextel Communications, Inc.                                2.0
Ono Finance PLC                                            1.5
Worldwide Fiber, Inc.                                      1.5
Allied Waste North America Corp.                           1.4
Regal Cinemas, Inc.                                        1.3
Exodus Communications, Inc.                                1.3
NTL, Inc.                                                  1.2
</TABLE>


(1) This return does not include the Fund's maximum 4.75% sales charge.
    (2) The Fund's distribution rate represents actual distributions paid to
    shareholders and is calculated daily by dividing the last distribution
    per share (annualized) by the net asset value.  (3) 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.  (4) For the one-year, three-year, and ten-year
    periods ended 9/30/99, Income Fund of Boston Class A shares ranked 18
    (of 302 funds), 4 (of 165 funds), and 8 (of 54 funds), respectively.
    Rankings are based on percent change in net asset value and do not take
    sales charges into consideration. Rankings for other Classes will vary.
    Past performance is no guarantee of  future results. It is not possible
    to invest directly in an Index or Lipper category.  (5) Returns are
    calculated by determining the percentage change in net asset value (NAV)
    with all distributions reinvested. SEC returns reflect maximum sales
    charge as noted. (6) Ten largest holdings account for 17.1% of the Fund's
    net assets, determined by dividing the total market value of the
    holdings by the total net assets of the Fund. 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.

                                      2

<PAGE>

EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999
MANAGEMENT DISCUSSION

[PICTURE]                      AN INTERVIEW WITH
                               MICHAEL W. WEILHEIMER,
                               PORTFOLIO MANAGER OF
Michael W. Weilheimer          EATON VANCE INCOME FUND OF BOSTON.
Portfolio Manager
                               Q: MIKE, THE PAST FISCAL YEAR HAS BEEN
                                  VERY EVENTFUL FOR THE FINANCIAL MARKETS.
                                  HOW WOULD YOU DESCRIBE THE HIGH-YIELD
                                  MARKETS DURING THAT PERIOD?

A: The high-yield market was very challenging. Last year's turmoil in Asia
   resulted in a significant widening of quality spreads -- the difference in
   yields between bonds of varying quality. During the early fall months,
   spreads for high-yield bonds reached as high as 650 basis points (6.5%) over
   Treasury yields. That's the widest they have been since 1991, which indicates
   enormous value in the high-yield market.

   The market subsequently rallied, although an infusion of new supply proved a
   hurdle. While heavy new supply typically takes a while to digest, that's
   especially true in a rising rate environment. Nonetheless, despite the
   difficult environment, the high-yield market produced positive returns and
   was among the best-performing fixed-income asset classes during the past
   year.

Q: THE FUND REGISTERED EXCELLENT PERFORMANCE IN THIS DIFFICULT PERIOD. HOW
   DID YOU MANAGE TO GENERATE THE ABOVE-AVERAGE RETURNS?

A: We detected some potential problems on the horizon in the summer of 1998.
   At that time, we began to increase our cash positions, with an eye toward
   future buying opportunities. That worked to our advantage at the market
   bottom, when the Fund invested fairly aggressively. We were able to
   identify seasoned companies with good fundamentals whose bonds were trading
   at significantly undervalued levels.

   Even as the market recovered somewhat in January, high-yield investors
   generally focused  on the more liquid, BB-rated names, providing yet
   another opportunity for the Fund in the B-rated segment of the market.
   That move benefited the Fund as interest rates moved higher during the
   year, because B-rated bonds are somewhat less sensitive to rising interest
   rates.

Q: WHERE HAVE YOU FOCUSED THE FUND'S INVESTMENTS?

A: Communications and cable companies remained the Fund's largest industry
   weightings at September 30, 1999, each characterized by continued strong
   growth and reliable cash flows. There has, however, been an adjustment

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

<TABLE>
<CAPTION>
Ratings Distribution(1)           Five Largest Sector Weightings(1)
- ------------------------------    --------------------------------------------
By total investments              By total net assets
<S>              <C>              <C>                                     <C>

[GRAPH]                           [GRAPH]

AAA               8.90%           Broadcasting & Cable                    13.4%
BB                3.90%           Wireless Communication Services-Int'l   10.0%
B                62.70%           Information Technology Services          6.6%
CCC              11.50%           Wireless Communication Services          6.1%
Non-Rated        13.00%           Wireless Communication Services-N.A.     6.0%
</TABLE>

(1) Because the Fund is actively managed, Ratings Distribution and Sector
Weightings are subject to change. Five largest sector holdings account for
42.1% of the Fund.

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.


                                     3

<PAGE>

EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999
MANAGEMENT DISCUSSION CONT'D

   in our telecom and cable investments, as we've shifted our emphasis
   from the U.S. to Europe.

   The climate for telecom companies in Europe is less competitive and, in
   our view, the potential for consolidation is greater. In recent years,
   we've seen a wave of mergers in the U.S., with Bell operating companies
   merging to integrate networks and achieve efficiency of scale. We believe
   a similar trend will emerge in Europe, with smaller companies
   participating in the consolidation as well.

Q: COULD YOU DISCUSS SOME OF THE TELECOM COMPANIES IN WHICH THE FUND HAS
   INVESTMENTS?

A: Yes. The Fund has an investment in IXC Communications bonds. IXC
   provides data and voice transmission services, and owns and operates a
   coast-to-coast fiber optic network. Earlier this year, IXC agreed to be
   purchased by Cincinnati Bell, an Ohio-based, local phone company. We
   believe that the infusion of Cincinnati Bell's resources and new
   management should have a favorable impact on the credit.

   Allegiance Telecom is a Dallas-based competitive local exchange carrier
   that provides data, voice and Internet communications services to
   business, government and other institutional users in major metropolitan
   areas. In 1999, the company's installations of new switches and lines have
   run well ahead of schedule. In October, Allegiance established a switch in
   Baltimore, its eighteenth major market, and plans to install a switch in
   Detroit before year-end. The company is becoming an increasingly important
   provider of telecom services for the institutional market.

Q: LET'S TURN TO YOUR EUROPEAN INVESTMENTS. WHAT ABOUT THE TELECOM SECTOR?

A: The Portfolio has a position in Esat Telecom Group PLC, a leading
   telecom provider in Ireland. In addition to its leadership in fixed-line
   services, Esat has a 50% ownership in Esat Digifone, a wireless service
   provider. The company has enjoyed improved margins in the past year as it
   nears completion of its own fiber optic network.

   Esat is also a leading Internet Service Provider for corporate and
   residential use. The company registered 68% growth in its corporate
   customer base in the third quarter of 1999. In concert with IBM, Esat
   recently launched Surf PC, a service that provides residential users with
   IBM computers and Internet service.

Q: HAVE YOU FOUND OPPORTUNITIES AMONG EUROPEAN CABLE OPERATORS?

A: Yes. Telewest, a U.K.-based cable television operator was one of the
   Portfolio's largest holdings at September 30, 1999. The company recently
   announced the launch of a digital service that will allow customers to
   watch digital television in all of its formats, while offering "a la
   carte" service that permits customers to choose only those channels they
   want. In addition, the company announced that software giant Microsoft
   will purchase a stake in the company for $3 billion.

   NTL, Inc. is the largest provider of cable television service in the U.K.
   In March, the company began an interactive service that will enable users
   to shop, send E-mail and conduct financial transactions through their
   televisions. This service is gaining momentum in the U.K. and is expected
   in coming years to spur growth in electronic commerce in the U.K. and
   Europe. Reflecting the strong interest in the new technology, France
   Telecom and Microsoft have each purchased a stake in NTL.

Q: WAS THERE ANY SECTOR IN WHICH YOU FOUND NEW OPPORTUNITIES?

A: Yes. The gaming and lodging industry has become increasingly attractive
   in the past year. Gaming companies have generated very consistent revenue
   growth in recent years; the industry itself has been rationalized by a
   decline in new construction and licensing. As the existing


                                   4

<PAGE>

EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999
MANAGEMENT DISCUSSION CONT'D

   properties have matured, companies have added amenities, such as golf
   courses, hotels and entertainment features. That has encouraged visitors
   to book longer visits, a trend that has improved the growth prospects of
   these companies. We've avoided companies focusing on Las Vegas and
   Atlantic City in favor of companies such as Hollywood Park, Inc. and
   Hollywood Casino Corp. which have focused on newer gaming markets,
   including the Gulf Coast, Chicago and Indiana.

Q: WERE THERE ANY AREAS THAT THE FUND AVOIDED?

A: Yes. There were some areas that we underweighted or avoided altogether,
   and that helped the Fund's relative performance. For example, we
   maintained a relatively small exposure to the manufacturing sector, where
   there has been a near-recession atmosphere in some sectors because of weak
   demand from Asia.

   Another area we sidestepped was nursing homes. As with hospitals, nursing
   home revenues have suffered from shifting Medicare reimbursement policies.
   Until those issues are resolved, the industry faces an uncertain future.
   Finally, we avoided the paging sector. Pagers are suffering from competing
   technologies, especially cellular phones. As the cost of cellular phone
   usage declines, it reduces demand for paging services. That trend has
   exerted pricing pressures and resulted in lower revenues per unit.

Q: MIKE, LOOKING AHEAD, WHAT IS YOUR OUTLOOK FOR THE HIGH-YIELD MARKET IN
   THE COMING YEAR?

A: I believe that the outlook has improved considerably in recent months.
   The economy is sound and inflation remains in check. Many of the weak
   Asian economies have begun to recover, which should improve foreign
   demand. Meanwhile, the high-yield market remains a very important
   financing tool for companies in the world's expanding communications
   sector, an area that is likely to produce more excellent high-yield
   opportunities. Moreover, with the widest spreads we've seen in many years,
   there is excellent value in the high-yield market.


                             [GRAPH]

<TABLE>
<CAPTION>
<S>                                                     <C>          <C>
Performance**                                           Class A      Class I
- ------------------------------------------------------------------------------
Average Annual Total Returns (at net asset value)
- ------------------------------------------------------------------------------
One Year                                                  11.97%        N.A.
Five Years                                                10.91         N.A.
Ten Years                                                 10.59         N.A.
Life of Fund+                                             10.11        -0.44%++

SEC Average Annual Total Returns (including sales charge)
- -------------------------------------------------------------------------------
One Year                                                   6.66%        N.A.
Five Years                                                 9.85         N.A.
Ten Years                                                 10.05         N.A.
Life of Fund+                                              9.92        -0.44%++
</TABLE>

 + Inception dates: Class A: 6/15/72; Class I: 7/1/99
++ Returns for Class I are cumulative total returns.

 * Source: TowersData, Bethesda, MD.; CSFirst Boston, Inc.

   The chart compares the Fund's Class A total return with that of the CS
   First Boston High Yield Bond Index and the Lehman Brothers High Yield Bond
   Index, broad-based, unmanaged market indexes of high-yield corporate
   bonds. With this report, we are establishing the CS First Boston Index as
   the Fund's primary benchmark in the belief that it more accurately
   reflects the Fund's investment universe. In compliance with Securities and
   Exchange Commission regulations, we are also including the Fund's previous
   benchmark, the Lehman Brothers High Yield Bond Index, in this report. The
   lines on the chart represent the total returns of $10,000 hypothetical
   investments in the Fund and the Indexes. The Indexes' total returns do not
   reflect commissions or expenses that would have been incurred if an
   investor individually purchased or sold the securities represented in the
   Indexes. It is not possible to invest directly in an Index. An investment
   in the Fund's Class I shares on 7/1/99 at net asset value would have been
   worth $9,956 on September 30, 1999.

** Returns are calculated by determining the percentage change in net
   asset value (NAV) with all distributions reinvested. SEC returns for Class
   A reflect maximum 4.75% sales charge.

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


                                          5

<PAGE>

Eaton Vance Income Fund of Boston, Class A vs.
Lehman Brothers High Yield Bond Index and
CS First Boston High Yield Bond Index

          Date        Fund/NAV       Fund/MOP      LBHYBI    CSFBHYI
       9/30/89         $10,000         $9,522     $10,000    $10,000
      10/31/89          $9,833         $9,362      $9,763     $9,749
      11/30/89          $9,752         $9,285      $9,743     $9,768
      12/31/89          $9,760         $9,293      $9,759     $9,725
       1/31/90          $9,528         $9,073      $9,549     $9,382
       2/28/90          $9,114         $8,678      $9,353     $9,209
       3/31/90          $9,042         $8,609      $9,598     $9,474
       4/30/90          $9,085         $8,651      $9,581     $9,514
       5/31/90          $9,285         $8,841      $9,766     $9,712
       6/30/90          $9,486         $9,032     $10,003    $10,017
       7/31/90          $9,703         $9,239     $10,272    $10,341
       8/31/90          $9,264         $8,821      $9,687     $9,863
       9/30/90          $8,694         $8,278      $8,980     $9,112
      10/31/90          $8,425         $8,022      $8,509     $8,882
      11/30/90          $8,280         $7,884      $8,774     $9,061
      12/31/90          $8,247         $7,853      $8,823     $9,104
       1/31/91          $8,227         $7,833      $9,066     $9,354
       2/28/91          $8,755         $8,337     $10,058    $10,160
       3/31/91          $9,228         $8,787     $10,650    $10,790
       4/30/91          $9,951         $9,476     $11,087    $11,238
       5/31/91         $10,004         $9,526     $11,107    $11,294
       6/30/91         $10,294         $9,801     $11,435    $11,590
       7/31/91         $10,719        $10,206     $11,801    $11,981
       8/31/91         $10,889        $10,369     $12,073    $12,199
       9/30/91         $11,174        $10,640     $12,240    $12,476
      10/31/91         $11,570        $11,017     $12,649    $12,889
      11/30/91         $11,710        $11,150     $12,715    $12,992
      12/31/91         $11,780        $11,217     $12,898    $13,087
       1/31/92         $12,274        $11,687     $13,352    $13,620
       2/28/92         $12,565        $11,964     $13,682    $13,951
       3/31/92         $12,862        $12,247     $13,852    $14,159
       4/30/92         $13,031        $12,408     $13,904    $14,171
       5/31/92         $13,175        $12,545     $14,100    $14,364
       6/30/92         $13,380        $12,741     $14,233    $14,506
       7/31/92         $13,592        $12,942     $14,448    $14,730
       8/31/92         $13,772        $13,114     $14,637    $14,933
       9/30/92         $13,884        $13,220     $14,786    $15,030
      10/31/92         $13,735        $13,078     $14,578    $14,874
      11/30/92         $13,799        $13,139     $14,762    $15,097
      12/31/92         $13,933        $13,267     $14,930    $15,268
       1/31/93         $14,257        $13,575     $15,364    $15,684

                                   Page 1 of 3

<PAGE>

       2/28/93         $14,554        $13,858     $15,635    $15,995
       3/31/93         $14,762        $14,056     $15,836    $16,332
       4/30/93         $14,897        $14,184     $15,974    $16,425
       5/31/93         $15,126        $14,403     $16,164    $16,665
       6/30/93         $15,439        $14,700     $16,504    $16,967
       7/31/93         $15,595        $14,850     $16,664    $17,143
       8/31/93         $15,644        $14,896     $16,804    $17,289
       9/30/93         $15,632        $14,885     $16,847    $17,388
      10/31/93         $15,979        $15,215     $17,188    $17,706
      11/30/93         $16,193        $15,419     $17,270    $17,929
      12/31/93         $16,437        $15,651     $17,484    $18,155
       1/31/94         $16,818        $16,014     $17,864    $18,478
       2/28/94         $16,946        $16,136     $17,817    $18,506
       3/31/94         $16,449        $15,663     $17,144    $17,962
       4/30/94         $16,256        $15,479     $17,027    $17,721
       5/31/94         $16,343        $15,561     $17,036    $17,822
       6/30/94         $16,419        $15,634     $17,089    $17,703
       7/31/94         $16,360        $15,578     $17,234    $17,786
       8/31/94         $16,300        $15,521     $17,356    $17,914
       9/30/94         $16,296        $15,517     $17,357    $17,985
      10/31/94         $16,318        $15,538     $17,398    $17,998
      11/30/94         $16,124        $15,353     $17,179    $17,789
      12/31/94         $16,226        $15,450     $17,305    $17,978
       1/31/95         $16,372        $15,589     $17,540    $18,167
       2/28/95         $16,761        $15,960     $18,141    $18,613
       3/31/95         $16,845        $16,039     $18,336    $18,824
       4/30/95         $17,315        $16,487     $18,803    $19,242
       5/31/95         $17,755        $16,906     $19,330    $19,784
       6/30/95         $17,773        $16,923     $19,459    $19,915
       7/31/95         $18,086        $17,221     $19,699    $20,224
       8/31/95         $18,020        $17,158     $19,760    $20,280
       9/30/95         $18,129        $17,262     $20,003    $20,513
      10/31/95         $18,222        $17,351     $20,069    $20,741
      11/30/95         $18,403        $17,523     $20,304    $20,839
      12/31/95         $18,707        $17,812     $20,623    $21,103
       1/31/96         $19,055        $18,144     $20,986    $21,504
       2/28/96         $19,372        $18,446     $21,003    $21,618
       3/31/96         $19,248        $18,328     $20,989    $21,560
       4/30/96         $19,383        $18,456     $21,035    $21,676
       5/31/96         $19,597        $18,660     $21,161    $21,852
       6/30/96         $19,612        $18,674     $21,336    $21,900
       7/31/96         $19,753        $18,809     $21,436    $22,097
       8/31/96         $20,071        $19,111     $21,667    $22,338
       9/30/96         $20,561        $19,578     $22,189    $22,722
      10/31/96         $20,630        $19,644     $22,360    $22,913
      11/30/96         $20,975        $19,972     $22,801    $23,270

                                   Page 2 of 3

<PAGE>

      12/31/96         $21,277        $20,260     $22,964    $23,724
       1/31/97         $21,530        $20,501     $23,188    $23,897
       2/28/97         $21,925        $20,877     $23,572    $24,347
       3/31/97         $21,471        $20,444     $23,221    $24,074
       4/30/97         $21,718        $20,680     $23,466    $24,288
       5/31/97         $22,321        $21,254     $23,968    $24,776
       6/30/97         $22,789        $21,699     $24,300    $25,113
       7/31/97         $23,455        $22,334     $24,967    $25,646
       8/31/97         $23,607        $22,478     $24,911    $25,784
       9/30/97         $24,195        $23,038     $25,405    $26,295
      10/31/97         $24,182        $23,026     $25,427    $26,292
      11/30/97         $24,359        $23,194     $25,670    $26,479
      12/31/97         $24,740        $23,557     $25,895    $26,720
       1/31/98         $25,381        $24,167     $26,361    $27,174
       2/28/98         $25,693        $24,464     $26,516    $27,386
       3/31/98         $26,142        $24,892     $26,765    $27,523
       4/30/98         $26,270        $25,014     $26,870    $27,729
       5/31/98         $26,294        $25,037     $26,964    $27,812
       6/30/98         $26,341        $25,082     $27,061    $27,871
       7/31/98         $26,514        $25,246     $27,215    $28,066
       8/31/98         $24,474        $23,303     $25,713    $26,160
       9/30/98         $24,431        $23,263     $25,829    $26,158
      10/31/98         $23,787        $22,650     $25,300    $25,637
      11/30/98         $25,432        $24,216     $26,350    $26,937
      12/31/98         $25,458        $24,240     $26,379    $26,875
       1/31/99         $26,107        $24,859     $26,771    $27,128
       2/28/99         $26,395        $25,133     $26,613    $27,071
       3/31/99         $26,992        $25,701     $26,866    $27,317
       4/30/99         $27,777        $26,449     $27,387    $27,921
       5/31/99         $27,450        $26,137     $27,016    $27,619
       6/30/99         $27,469        $26,156     $26,959    $27,633
       7/31/99         $27,664        $26,341     $27,067    $27,647
       8/31/99         $27,431        $26,120     $26,768    $27,401
       9/30/99         $27,355        $26,047     $26,575    $27,190

                                   Page 3 of 3

<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

PORTFOLIO OF INVESTMENTS

<TABLE>
<S>                                       <C>   <C>              <C>
CORPORATE BONDS & NOTES -- 83.9%

                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------
Aerospace and Defense -- 0.7%
- -----------------------------------------------------------------------------
Dunlop Stand Aero Holdings, Sr. Notes,
11.875%, 5/15/09(1)                                 $ 1,100      $  1,111,000
Transdigm, Inc., 10.375%, 12/1/08                     1,300         1,254,500
- -----------------------------------------------------------------------------
                                                                 $  2,365,500
- -----------------------------------------------------------------------------
Apparel -- 1.0%
- -----------------------------------------------------------------------------
Hosiery Corp. of America, Inc., Sr. Sub.
Notes, 13.75%, 8/1/02                               $ 1,700      $  1,768,000
William Carter Co., Sr. Sub. Notes,
10.375%, 12/1/06                                      1,575         1,551,375
- -----------------------------------------------------------------------------
                                                                 $  3,319,375
- -----------------------------------------------------------------------------
Auto and Parts -- 1.8%
- -----------------------------------------------------------------------------
Dura Operating Corp., Sr. Sub. Notes,
9.00%, 5/1/09(1)                          EUR         2,000      $  1,992,298
JL French Automotive Casting, Sr. Sub.
Notes, 11.50%, 6/1/09(1)                            $ 1,850         1,836,125
Talon Automotive Group, Sr. Sub. Notes,
9.625%, 5/1/08                                        2,550         2,173,875
- -----------------------------------------------------------------------------
                                                                 $  6,002,298
- -----------------------------------------------------------------------------
Broadcasting and Cable -- 11.2%
- -----------------------------------------------------------------------------
ACME Television Services, Inc., 10.875%
(0% until 2000), 9/30/04                            $ 2,250      $  1,946,251
Avalon Cable Holdings, LLC, Sr. Disc.
Notes, 11.875% (0% until 2003), 12/1/08               2,850         1,838,250
Avalon Cable of Michigan LLC, Sr. Sub
Notes, 9.375%, 12/1/08                                  400           402,000
Charter Communication Holdings LLC, Sr.
Notes, 8.625% (0% until 2009), 4/1/09(1)                800           760,000
Charter Communication, Sr. Disc. Notes,
9.92% (0% until 2004), 4/1/11(1)                      4,200         2,520,000
Diamond Cable Communications Co., Sr.
Disc. Notes, 11.75% (0% until 2000),
12/15/05                                              1,000           897,500
Digital Television Services, Inc.,
Guaranteed Notes, 12.50%, 8/1/07                      1,440         1,519,200
Golden Sky Systems, 12.375%, 8/1/06                   1,310         1,401,700
Golden Sky Systems, Sr. Disc. Notes,
13.50% (0% until 2004), 3/1/07(1)                     2,855         1,605,937
Muzak Holdings LLC, Sr. Disc. Notes,
13.00% (0% until 2004), 3/15/10(1)                    2,812         1,602,840
                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------

Broadcasting and Cable (continued)
- -----------------------------------------------------------------------------
Muzak Holdings LLC, Sr. Sub. Notes,
9.875%, 3/15/09(1)                                  $ 2,100      $  2,005,500
NTL, Inc., 9.75% (0% until 2004),
4/15/09                                   GBP         2,000         2,074,842
NTL, Inc., Sr. Notes, 12.375%
(0% until 2003), 10/1/08                              3,000         2,047,500
Ono Finance PLC, 13.00%, 5/1/09(1)        EUR         3,473         3,637,967
Ono Finance PLC, 13.00%, 5/1/09(1)        EUR         1,200         1,316,834
RCN Corp., Sr. Disc. Notes, 9.80% (0%
until 2003), 2/15/08                                    750           451,875
RCN Corp., Sr. Disc. Notes, 11.125% (0%
until 2002), 10/15/07                                 1,250           812,500
Telemundo Holdings, Inc., Sr. Disc.
Notes, 11.50% (0% until 2003), 8/15/08                2,200         1,284,250
Telewest Communication PLC, 9.875% (0%
until 2004), 4/15/09(1)                   GBP         5,000         5,104,770
Telewest Communication PLC, Debs.,
9.625%, 10/1/06                                          75            75,937
Telewest PLC, Debs., 11.00%
(0% until 2000), 10/1/07                              2,810         2,507,925
United International Holdings, Inc., Sr.
Disc. Notes, 10.75% (0% until 2003),
2/15/08                                               1,985         1,210,850
- -----------------------------------------------------------------------------
                                                                 $ 37,024,428
- -----------------------------------------------------------------------------
Business Services - Miscellaneous -- 4.0%
- -----------------------------------------------------------------------------
Allied Waste, Sr. Sub Notes,
10.00%, 8/1/09(1)                                   $ 5,150      $  4,738,000
AP Holdings, Inc., Sr. Disc. Notes,
11.25% (0% until 2003), 3/15/08                       2,450         1,243,375
Apcoa, Inc., Guaranteed Sr. Sub. Notes,
9.25%, 3/15/08                                          830           711,725
Cybernet Internet Service,
14.00%, 7/1/09(1)                                       800           804,000
Federal Data Corp., Sr. Sub. Notes,
10.125%, 8/1/05                                       1,185           977,625
Intertek Finance PLC, Sr. Sub. Notes,
10.25%, 11/1/06                                       1,400         1,295,000
Richmont Marketing Specialists,
10.125%, 12/15/07(1)                                  4,445         3,367,087
- -----------------------------------------------------------------------------
                                                                 $ 13,136,812
- -----------------------------------------------------------------------------
Business Services - Rental & Leasing -- 2.9%
- -----------------------------------------------------------------------------
Anthony Crane Rental LP, Guaranteed Sr.
Notes, 10.375%, 8/1/08                              $ 1,000      $    900,000
NationsRent, Inc., Guaranteed Sr. Sub.
Notes, 10.375%, 12/15/08                              1,800         1,786,500
Neff Corp., 10.25%, 6/1/08                            1,950         1,940,250
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       6
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

PORTFOLIO OF INVESTMENTS CONT'D

<TABLE>
                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------

Business Services - Rental & Leasing (continued)
- -----------------------------------------------------------------------------
Neff Corp., Guaranteed Sr. Sub. Notes,
10.25%, 6/1/08                                      $   850      $    845,750
SBA Communications Corp., Sr. Disc.
Notes, 12.00% (0% to 2003), 3/1/08                      900           486,000
Spectrasite Holdings, Inc., Sr. Disc.
Notes, 11.25% (0% until 2004),
4/15/09(1)                                              600           300,000
Spectrasite Holdings, Inc., Sr. Disc.
Notes, 12.00% (0% until 2003), 7/15/08                2,400         1,356,000
Unisite, Inc., Sub. Notes, 13.00%
(0% until 2000), 12/15/04(1)                          1,500         1,881,600
- -----------------------------------------------------------------------------
                                                                 $  9,496,100
- -----------------------------------------------------------------------------
Cable - Telecommunications -- 1.0%
- -----------------------------------------------------------------------------
Insight Midwest, 9.75%, 10/1/09(1)                  $ 1,800      $  1,822,500
United Pan-Europe, Sr. Disc. Notes,
12.50% (0% until 2004), 8/1/09(1)                     2,600         1,475,500
- -----------------------------------------------------------------------------
                                                                 $  3,298,000
- -----------------------------------------------------------------------------
Chemicals -- 1.1%
- -----------------------------------------------------------------------------
Lyondell Chemical Co., 9.625%, 5/1/07               $ 1,000      $    997,500
Lyondell Chemical Co., Sr. Sub. Notes,
10.875%, 5/1/09                                       2,650         2,676,500
- -----------------------------------------------------------------------------
                                                                 $  3,674,000
- -----------------------------------------------------------------------------
Consumer Products -- 1.9%
- -----------------------------------------------------------------------------
Amscan Holdings, Inc., Sr. Sub. Notes,
9.875%, 12/15/07                                    $ 1,120      $    879,200
Glenoit Corp., Sr. Sub. Notes,
11.00%, 4/15/07                                       2,400         1,572,000
Head Holding GMBH, Sr. Notes,
10.75%, 7/15/06(1)                        EUR         2,500         2,650,182
Icon Health and Fitness, Inc.,
12.00%, 9/27/05(1)                                      355           195,360
Jafra Cosmetics International, Inc.,
Guaranteed Sr. Sub. Notes,
11.75%, 5/1/08                                        1,000           865,000
- -----------------------------------------------------------------------------
                                                                 $  6,161,742
- -----------------------------------------------------------------------------
Containers and Packaging -- 1.1%
- -----------------------------------------------------------------------------
Consolidated Container Co. LLC, Sr. Sub.
Notes, 10.125%, 7/15/09(1)                          $   800      $    808,000
Consumers International, Inc., Sr.
Notes, 10.25%, 4/1/05                                   985           940,675
                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------

Containers and Packaging (continued)
- -----------------------------------------------------------------------------
Stone Container Corp., Sr. Notes,
12.58%, 8/1/16                                      $ 1,800      $  1,984,500
- -----------------------------------------------------------------------------
                                                                 $  3,733,175
- -----------------------------------------------------------------------------
Drugs -- 0.7%
- -----------------------------------------------------------------------------
Biovail Corp., Sr. Notes,
10.875%, 11/15/05                                   $   950      $    985,625
King Pharmaceutical, Inc.,
10.75%, 2/15/09                                       1,250         1,293,750
- -----------------------------------------------------------------------------
                                                                 $  2,279,375
- -----------------------------------------------------------------------------
Electronic Equipment -- 2.5%
- -----------------------------------------------------------------------------
Amkor Technologies, Inc., Sr. Notes,
9.25%, 5/1/06(1)                                    $   100      $     99,750
Amkor Technologies, Inc., Sr. Sub Notes,
10.50%, 5/1/09(1)                                     4,200         4,105,500
Jordan Telecom Products, Inc., Sr. Disc.
Notes, 11.75% (0% until 2000), 8/1/07                 2,185         1,857,250
Viasystems, Inc., Sr. Sub. Notes,
9.75%, 6/1/07                                           900           778,500
Viasystems, Inc., Sr. Sub. Notes, Series
B, 9.75%, 6/1/07                                        895           774,175
Wavetek Corp., Sr. Sub. Notes,
10.125%, 6/15/07                                        840           709,800
- -----------------------------------------------------------------------------
                                                                 $  8,324,975
- -----------------------------------------------------------------------------
Entertainment -- 3.0%
- -----------------------------------------------------------------------------
Cinemark USA, Sr. Sub. Notes,
9.625%, 8/1/08(1)                                   $ 2,500      $  2,162,500
Marvel Enterprise, Inc.,
12.00%, 6/15/09                                       1,400         1,281,000
Premier Parks, Inc., Sr. Disc. Notes,
10.00% (0% until 2003), 4/1/08                        1,400           896,000
Premier Parks, Inc., Sr. Notes,
9.75%, 6/15/07                                        1,250         1,218,750
Regal Cinemas, Inc., Sr. Sub. Notes,
8.875%, 12/15/10                                      2,860         1,901,900
Regal Cinemas, Inc., Sr. Sub. Notes,
9.50%, 6/1/08                                         3,590         2,459,150
- -----------------------------------------------------------------------------
                                                                 $  9,919,300
- -----------------------------------------------------------------------------
Financial Services -- 0.4%
- -----------------------------------------------------------------------------
Willis Corroon Corp., 9.00%, 2/1/09                 $ 1,600      $  1,448,000
- -----------------------------------------------------------------------------
                                                                 $  1,448,000
- -----------------------------------------------------------------------------
Foods -- 3.7%
- -----------------------------------------------------------------------------
B & G Foods, Inc., Sub. Notes,
9.625%, 8/1/07                                      $ 1,860      $  1,683,300
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       7
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

PORTFOLIO OF INVESTMENTS CONT'D

<TABLE>
                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------

Foods (continued)
- -----------------------------------------------------------------------------
Cott Corp., Sr. Notes, 8.50%, 5/1/07                $   500      $    467,500
Del Monte Corp., Sr. Notes,
12.25%, 4/15/07                                       2,820         3,087,900
Del Monte Foods Co., Sr. Disc. Notes,
12.50% (0% until 2002), 12/15/07                        875           665,000
Eagle Family Foods, Inc., Guaranteed Sr.
Notes, 8.75%, 1/15/08                                   700           535,500
International Home Foods, Inc., Sr. Sub.
Notes, 10.375%, 11/1/06                               2,250         2,300,625
Luigino's, Inc., Sr. Sub. Notes,
10.00%, 2/1/06                                          825           775,500
Premier International Foods, Sr. Notes,
12.00%, 9/1/09(1)                                     2,750         2,763,750
- -----------------------------------------------------------------------------
                                                                 $ 12,279,075
- -----------------------------------------------------------------------------
Health Services -- 0.9%
- -----------------------------------------------------------------------------
Alliance Imaging, Sr. Sub Notes,
9.625%, 12/15/05                                    $   800      $    813,000
Lifepoint Hospital Holdings, Sr. Sub.
Notes, 10.75%, 5/15/09(1)                             2,330         2,318,350
- -----------------------------------------------------------------------------
                                                                 $  3,131,350
- -----------------------------------------------------------------------------
Information Technology Services -- 6.5%
- -----------------------------------------------------------------------------
Covad Communication Group, Sr. Disc.
Notes, 13.50% (0% until 2003), 3/15/08              $ 1,900      $    988,000
Diva Systems Corp., Sr. Notes, 12.625%
(0% until 2003), 3/1/08                               2,250           708,750
Dolphin Telecom, Sr. Disc. Notes, 14.00%
(0% until 2004), 5/15/09(1)                           5,225         2,168,375
Exodus Communications, Inc., Sr. Notes,
11.25%, 7/1/08(1)                                     1,780         1,820,050
Exodus Communications, Inc., Sr. Notes,
11.25%, 7/1/08                                        2,530         2,586,925
IPC Information Systems, Sr. Disc.
Notes, 10.875% (0% until 2001), 5/1/08                1,750         1,323,437
PSINet, Inc., 11.00%, 8/1/09(1)           EUR         1,000         1,033,438
PSINet, Inc., Sr. Notes,
11.00%, 8/1/09(1)                                     5,175         5,136,187
PSINet, Inc., Sr. Notes,
11.50%, 11/1/08                                       1,025         1,037,812
Verio, Inc., Sr. Notes, 11.25%, 12/1/08               3,600         3,699,000
Verio, Inc., Sr. Notes, 13.50%, 6/15/04                 800           866,000
- -----------------------------------------------------------------------------
                                                                 $ 21,367,974
- -----------------------------------------------------------------------------
Lodging and Gaming -- 5.3%
- -----------------------------------------------------------------------------
Coast Hotels & Casino, Inc.,
9.50%, 4/1/09                                       $   925      $    874,125
HMH Properties, 7.875%, 8/1/08(1)                     2,412         2,164,770
                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------

Lodging and Gaming (continued)
- -----------------------------------------------------------------------------
Hollywood Casino Corp., 11.25%, 5/1/07              $ 2,150      $  2,171,500
Hollywood Casino Corp., First Mortgage
Bonds, 13.00%, 8/1/06(1)                              2,850         2,949,750
Hollywood Park, Inc., Sr. Sub. Notes,
9.50%, 8/1/07                                         3,515         3,444,700
Majestic Star Casino LLC,
10.875%, 7/1/06(1)                                    1,750         1,723,750
Sun International Hotels, Sr. Sub.
Notes, 9.00%, 3/15/07                                   750           701,250
Waterford Gaming LLC, Sr. Notes,
9.50%, 3/15/10(1)                                     3,479         3,392,025
- -----------------------------------------------------------------------------
                                                                 $ 17,421,870
- -----------------------------------------------------------------------------
Manufacturing -- 1.5%
- -----------------------------------------------------------------------------
Blount, Inc., 13.00%, 8/1/09(1)                     $ 1,000      $  1,036,250
Cherokee International, Sr. Sub Notes,
10.50%, 5/1/09(1)                                     1,625         1,503,125
High Voltage Engineering, Sr. Notes,
10.50%, 8/15/04                                         600           549,000
Roller Bearing Holdings Co., Sr. Disc.
Notes, 13.00% (0% until 2002),
6/15/09(1)                                            3,467         1,785,505
- -----------------------------------------------------------------------------
                                                                 $  4,873,880
- -----------------------------------------------------------------------------
Oil and Gas - Equipment and Services -- 1.4%
- -----------------------------------------------------------------------------
Grant Geophysical, Inc., Sr. Notes,
9.75%, 2/15/08                                      $ 1,000      $    575,000
Key Energy Services, 14.00%, 1/15/09                  1,000         1,070,000
R&B Falcon Corp., 9.50%, 12/15/08                       860           827,750
RBF Finance Co., 11.375%, 3/15/09                       800           848,000
Universal Compression, Inc., Sr. Disc.
Notes, 9.875% (0% until 2003), 2/15/08                2,350         1,410,000
- -----------------------------------------------------------------------------
                                                                 $  4,730,750
- -----------------------------------------------------------------------------
Oil and Gas - Exploration and Production -- 2.3%
- -----------------------------------------------------------------------------
Chesapeake Energy Corp., 9.125%, 4/15/06            $ 1,100      $  1,020,250
Chesapeake Energy Corp., Sr. Notes,
7.875%, 3/15/04                                         330           293,700
Chesapeake Energy Corp., Sr. Notes,
8.50%, 3/15/12                                        2,120         1,727,800
Comstock Resources, Inc., Sr. Notes,
11.25%, 5/1/07(1)                                     1,350         1,393,875
Energy Corp. of America, Sr. Sub. Notes,
9.50%, 5/15/07                                          390           351,488
Gothic Production Corp.,
11.125%, 5/1/05                                       1,200         1,038,000
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       8
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

PORTFOLIO OF INVESTMENTS CONT'D

<TABLE>
                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------

Oil and Gas - Exploration and Production (continued)
- -----------------------------------------------------------------------------
Gulf Canada Resources, Ltd., Sr. Notes,
8.375%, 11/15/05                                    $   550      $    540,947
Plains Resources, Inc., Sr. Sub. Notes,
10.25%, 3/15/06(1)                                    1,250         1,268,750
- -----------------------------------------------------------------------------
                                                                 $  7,634,810
- -----------------------------------------------------------------------------
Oil and Gas - Refining -- 0.2%
- -----------------------------------------------------------------------------
Western Natural Gas, Sr. Sub. Notes,
10.00%, 6/15/09(1)                                  $   750      $    770,625
- -----------------------------------------------------------------------------
                                                                 $    770,625
- -----------------------------------------------------------------------------
Paper and Forest Products -- 1.4%
- -----------------------------------------------------------------------------
Asia Pulp and Paper, Debs,
12.00%, 12/29/49                                    $ 1,500      $    870,000
Indah Kiat Finance Mauritius, Sr. Unsec.
Notes, 10.00%, 7/1/07                                   850           476,000
Kappa Beheer BV, 12.50%
(0% until 2004), 7/15/09(1)               EUR         2,500         1,478,243
Pacifica Papers, Inc., 10.00%, 3/15/09                  500           510,000
Pindo Deli Finance Mauritius, Ltd.,
Guaranteed Sr. Notes, 10.75%, 10/1/07                   600           325,500
Repap New Brunswick, Inc., Sr. Notes,
9.00%, 6/1/04                                           600           579,000
Tjiwi Kimia Finance Mauritus, Ltd.,
Guaranteed Sr. Sub. Notes,
10.00%, 8/1/04                                          700           386,750
- -----------------------------------------------------------------------------
                                                                 $  4,625,493
- -----------------------------------------------------------------------------
Printing and Business Products -- 1.2%
- -----------------------------------------------------------------------------
MDC Communications Corp., Sr. Sub.
Notes, 10.50%, 12/1/06                              $ 3,900      $  3,861,000
- -----------------------------------------------------------------------------
                                                                 $  3,861,000
- -----------------------------------------------------------------------------
Publishing -- 0.5%
- -----------------------------------------------------------------------------
American Lawyer Media Corp., Sr. Disc.
Notes, 12.25% (0% to 2002), 12/15/08                $   730      $    465,375
Von Hoffman Press, Inc., Sr. Sub. Notes,
10.875%, 5/15/07(1)                                   1,275         1,255,875
- -----------------------------------------------------------------------------
                                                                 $  1,721,250
- -----------------------------------------------------------------------------
Restaurants -- 0.3%
- -----------------------------------------------------------------------------
Sbarro, Inc., Sr. Notes,
11.00%, 9/15/09(1)                                  $ 1,000      $    987,180
- -----------------------------------------------------------------------------
                                                                 $    987,180
- -----------------------------------------------------------------------------
                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------
Retail - Food and Drug -- 2.1%
- -----------------------------------------------------------------------------
AFC Enterprises, Inc., Sr. Sub Notes,
10.25%, 5/15/07                                     $ 2,400      $  2,355,000
Pantry, Inc., Sr. Sub. Notes,
10.25%, 10/15/07                                      3,020         3,027,550
Star Markets Co., Sr. Sub. Notes,
13.00%, 11/1/04                                       1,550         1,666,250
- -----------------------------------------------------------------------------
                                                                 $  7,048,800
- -----------------------------------------------------------------------------
Retail - General -- 1.7%
- -----------------------------------------------------------------------------
Advance Holding Corp., Sr. Debs.,
12.875% (0% until 2003), 4/15/09                    $ 1,000      $    550,000
Advance Stores Co., Inc., Sr. Sub.
Notes, 10.25%, 4/15/08                                1,600         1,496,000
Ames Department Stores, Sr. Notes,
10.00%, 4/15/06                                         775           757,563
Kindercare Learning Ctrs., Inc., Sr.
Sub. Notes, 9.50%, 2/15/09                            1,900         1,790,750
SpinCycle, Inc., Sr. Disc. Notes, 12.75%
(0% until 2001), 5/1/05                                 850           133,875
Tuesday Morning Corp., Sr. Sub. Notes,
11.00%, 12/15/07                                      1,015         1,040,375
- -----------------------------------------------------------------------------
                                                                 $  5,768,563
- -----------------------------------------------------------------------------
Semiconductors -- 1.9%
- -----------------------------------------------------------------------------
Chippac International Ltd., Inc.,
12.75%, 8/1/09(1)                                   $ 2,115      $  2,125,575
Intersil Corp., 13.25%, 8/15/09(1)                    1,250         1,303,125
SCG Holding Corp., Sr. Sub. Notes,
12.00%, 8/1/09(1)                                     2,750         2,835,938
- -----------------------------------------------------------------------------
                                                                 $  6,264,638
- -----------------------------------------------------------------------------
Transportation -- 1.3%
- -----------------------------------------------------------------------------
Budget Group, Inc., Sr. Notes,
9.125%, 4/1/06                                      $ 1,940      $  1,716,900
MTL, Inc., 10.498%, 6/15/06                             400           354,000
Pacer International, Inc., Sr. Sub.
Notes, 11.75%, 6/1/07(1)                              1,886         1,876,570
Worldwide Flight Service,
12.25%, 8/15/07(1)                                      250           248,750
- -----------------------------------------------------------------------------
                                                                 $  4,196,220
- -----------------------------------------------------------------------------
Wireless Communication Services -- 5.0%
- -----------------------------------------------------------------------------
Airgate PCS, Inc., 13.50%
(0% until 2004), 10/1/09                            $ 2,000      $  1,085,000
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       9
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

PORTFOLIO OF INVESTMENTS CONT'D

<TABLE>
                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------

Wireless Communication Services (continued)
- -----------------------------------------------------------------------------
Clearnet Communications, Sr. Disc.
Notes, 14.75% (0% until 2000), 12/15/05             $ 1,775      $  1,668,500
Dobson Communications Corp., Sr. Notes,
11.75%, 4/15/07                                         500           530,000
Dobson/Sygnet Communications, Inc., Sr.
Notes, 12.25%, 12/15/08                               1,175         1,233,750
Loral Space and Commerce, Sr. Notes,
9.50%, 1/15/06                                          720           617,400
Nextel Communications, Inc., Sr. Disc.
Notes, 9.75% (0% until 1999), 8/15/04                   490           494,900
Nextel Communications, Inc., Sr. Disc.
Notes, 10.65% (0% until 2002), 9/15/07                2,790         2,068,088
Nextel Communications, Sr. Disc. Notes,
14.00% (0% until 2004), 2/1/09                        1,250           737,500
Nextel International, Inc., Sr. Disc.
Notes, 12.125% (0% until 2003), 4/15/08               3,750         1,903,125
Tritel PCS, Inc., Sr. Disc. Notes,
12.75% (0% until 2004), 5/15/09(1)                    1,130           644,100
Williams Communications Corp.,
10.875%, 10/1/09                                      3,900         3,870,711
Winstar Communications, Inc., Sr. Disc.
Notes, 14.00% (0% until 2000), 10/15/05               2,000         1,690,000
- -----------------------------------------------------------------------------
                                                                 $ 16,543,074
- -----------------------------------------------------------------------------
Wireline Communication Services -
International -- 8.9%
- -----------------------------------------------------------------------------
Alestra SA, Sr. Notes,
12.125%, 5/15/06(1)                                 $ 1,250      $  1,203,125
Carrier1, Sr. Notes, 13.25%, 2/15/09                  3,500         3,570,000
Completel Europe NV, Sr. Disc. Notes,
14.00% (0% until 2004), 2/15/09(1)                    1,960         1,033,900
Energis PLC, 9.50%, 6/15/09(1)            GBP           800         1,291,013
Esat Telecom Group PLC, Sr. Deferred
Coupon Notes, 12.50% (0% until 2002),
2/1/07                                                1,985         1,439,125
Esprit Telecom Group PLC, Sr. Notes,
11.50%, 12/15/07                                      3,150         3,244,500
Esprit Telecom Group PLC, Sr. Notes,
11.50%, 12/15/07                          DEM         2,500         1,423,108
Facilicom International, Sr. Notes,
10.50%, 1/15/08                                       1,160           986,000
Jazztel PLC, with warrants,
14.00%, 4/1/09                            EUR         2,000         2,493,142
Primus Telecom Group, Sr. Notes,
11.25%, 1/15/09                                         750           716,250
Primus Telecom Group, Sr. Notes,
11.75%, 8/1/04                                        1,150         1,127,000
                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------

Wireline Communication Services -
International (continued)
- -----------------------------------------------------------------------------
RSL Communications PLC., Guaranteed Sr.
Notes, 10.50%, 11/15/08                             $   500      $    457,500
RSL Communications, Ltd., Sr. Notes,
12.25%, 11/15/06                                      1,015         1,009,925
Tele1 Europe BV, Sr. Notes,
13.00%, 5/15/09(1)                                      600           591,000
Versatel Telecom B.V., Sr. Notes,
13.25%, 5/15/08                                       3,500         3,561,250
Versatel Telecom, Sr. Notes,
11.875%, 7/15/09                                      1,255         1,189,369
Versatel Telecom, Sr. Notes,
11.875%, 7/15/09                          EUR         2,800         2,804,133
Viatel, Inc., Sr. Disc. Notes, 12.50%
(0% until 2003), 4/15/08                              1,760           976,800
Viatel, Inc., Sr. Notes,
11.25%, 4/15/08                                         520           483,600
- -----------------------------------------------------------------------------
                                                                 $ 29,600,740
- -----------------------------------------------------------------------------
Wireline Communication Services -
North America -- 4.5%
- -----------------------------------------------------------------------------
Allegiance Telecom, Inc., Sr. Notes,
12.875%, 5/15/08                                    $ 2,345      $  2,556,050
Focal Communications Corp., Sr. Disc.
Notes, 12.125% (0% until 2003), 2/15/08               3,300         1,872,750
GST Telecommunications, Sr. Sub. Notes,
12.75%, 11/15/07                                        800           804,000
Hyperion Telecommunication, Inc., Sr.
Sub. Notes, 12.00%, 11/1/07                           1,000         1,010,000
Level 3 Communications, Inc., Sr. Disc.
Notes, 10.50% (0% until 2003), 12/1/08                1,550           877,688
MGC Communications, Inc., Sr. Notes,
13.00%, 10/1/04                                       1,380         1,221,300
Nextlink Communications, Inc., Sr.
Notes, 12.50%, 4/15/06                                1,680         1,785,000
Worldwide Fiber, Inc., Sr. Notes,
12.00%, 8/1/09(1)                                     3,250         3,201,250
Worldwide Fiber, Inc., Sr. Notes,
12.50%, 12/15/05                                      1,700         1,729,750
- -----------------------------------------------------------------------------
                                                                 $ 15,057,788
- -----------------------------------------------------------------------------
Total Corporate Bonds & Notes
   (identified cost $290,991,105)                                $278,068,160
- -----------------------------------------------------------------------------
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       10
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

PORTFOLIO OF INVESTMENTS CONT'D

<TABLE>
<S>                                       <C>   <C>              <C>
COMMON STOCKS, WARRANTS AND RIGHTS -- 0.8%

                SECURITY                        SHARES           VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------
Broadcasting and Cable -- 0.0%
- -----------------------------------------------------------------------------
Pegasus Communications Corp.,
Warrants(2),(3)                                       1,410      $     74,011
UIH Australia/Pacific, Inc.,
Warrants(2),(3)                                         900                 9
- -----------------------------------------------------------------------------
                                                                 $     74,020
- -----------------------------------------------------------------------------
Business Services - Rental & Leasing -- 0.0%
- -----------------------------------------------------------------------------
Unisite, Inc., Warrants(2),(3)                          750      $          0
- -----------------------------------------------------------------------------
                                                                 $          0
- -----------------------------------------------------------------------------
Chemicals -- 0.0%
- -----------------------------------------------------------------------------
Sterling Chemicals Holdings, Inc.,
Common(3)                                             2,400      $      7,800
- -----------------------------------------------------------------------------
                                                                 $      7,800
- -----------------------------------------------------------------------------
Consumer Products -- 0.0%
- -----------------------------------------------------------------------------
HF Holdings, Inc., Warrants(2),(3)                    3,400      $          0
- -----------------------------------------------------------------------------
                                                                 $          0
- -----------------------------------------------------------------------------
Electronic Equipment -- 0.0%
- -----------------------------------------------------------------------------
Jordan Telecom Products, Inc.,
Common(2),(3)                                           700      $          0
- -----------------------------------------------------------------------------
                                                                 $          0
- -----------------------------------------------------------------------------
Foods -- 0.0%
- -----------------------------------------------------------------------------
Specialty Foods Acquisition Corp.,
Common(2),(3)                                        12,000      $        120
- -----------------------------------------------------------------------------
                                                                 $        120
- -----------------------------------------------------------------------------
Information Technology Services -- 0.1%
- -----------------------------------------------------------------------------
Cellnet Data Systems, Inc., Warrants,
Exp. 10/1/07(1),(3)                                   2,000      $         20
Diva Systems Corp., Warrants(2),(3)                   6,750                 0
Verio, Inc., Common(3)                                3,534           109,885
- -----------------------------------------------------------------------------
                                                                 $    109,905
- -----------------------------------------------------------------------------
Lodging and Gaming -- 0.0%
- -----------------------------------------------------------------------------
Peninsula Gaming LLC, Warrants(2),(3)                 6,338      $     38,027
- -----------------------------------------------------------------------------
                                                                 $     38,027
- -----------------------------------------------------------------------------
                SECURITY                        SHARES           VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------
Machinery -- 0.0%
- -----------------------------------------------------------------------------
MMH Holdings, Inc., Common(3)                             5      $          0
- -----------------------------------------------------------------------------
                                                                 $          0
- -----------------------------------------------------------------------------
Oil and Gas - Equipment and Services -- 0.3%
- -----------------------------------------------------------------------------
Key Energy Services, Inc.,
Warrants(2),(3)                                       1,000      $     15,000
R&B Falcon Corp., Warrants(1),(3)                     1,600           400,000
Weatherford International, Inc., Common              20,659           661,088
- -----------------------------------------------------------------------------
                                                                 $  1,076,088
- -----------------------------------------------------------------------------
Retail - General -- 0.0%
- -----------------------------------------------------------------------------
Spin Cycle, Inc., Warrants(2),(3)                       850      $          0
- -----------------------------------------------------------------------------
                                                                 $          0
- -----------------------------------------------------------------------------
Wireline Communication Services -
International -- 0.2%
- -----------------------------------------------------------------------------
Carrier1, Warrants(2),(3)                             3,500      $         35
Esat Holdings, Ltd., Common                           4,138            74,018
Primus Telecom Group, Warrants,
Exp. 8/1/04(2),(3)                                    1,150            29,261
Tele1 Europe BV, Warrants(2),(3)                        600            42,000
Versatel Telecom B.V., Warrants(2),(3)                3,500           399,541
- -----------------------------------------------------------------------------
                                                                 $    544,855
- -----------------------------------------------------------------------------
Wireline Communication Services -
North America -- 0.2%
- -----------------------------------------------------------------------------
Allegiance Telecom, Inc., Common                      4,089      $    215,184
AT & T Canada, Inc., Common                             771            48,428
Hyperion Telecommunications, Inc.,
Class A, Common(3)                                    6,060           149,985
Intermedia Communications, Inc.,
Common(3)                                             5,454           118,804
MGC Communications, Inc. Warrants,
Exp. 10/1/04(1),(3)                                   1,420           142,797
OpTel, Inc., Common(2),(3)                            1,460               197
- -----------------------------------------------------------------------------
                                                                 $    675,395
- -----------------------------------------------------------------------------
Total Common Stocks, Warrants and Rights
   (identified cost $1,544,479)                                  $  2,526,210
- -----------------------------------------------------------------------------
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       11
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

PORTFOLIO OF INVESTMENTS CONT'D

<TABLE>
<S>                                       <C>   <C>              <C>
PREFERRED STOCKS -- 7.5%

                SECURITY                        SHARES           VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------
Apparel -- 0.0%
- -----------------------------------------------------------------------------
Cluett American Corp., 12.50% (PIK)                      37      $        736
- -----------------------------------------------------------------------------
                                                                 $        736
- -----------------------------------------------------------------------------
Broadcasting and Cable -- 2.2%
- -----------------------------------------------------------------------------
Adelphia Communications Corp., 13% (PIK)             12,000      $  1,308,000
CSC Holdings, Inc., Series M, 11.125%
(PIK)                                                31,131         3,346,583
Pegasus Communications Corp., 12.75%
(PIK)                                                 2,487         2,462,130
- -----------------------------------------------------------------------------
                                                                 $  7,116,713
- -----------------------------------------------------------------------------
Business Services - Rental & Leasing -- 0.8%
- -----------------------------------------------------------------------------
Crown Castle International Corp.                      2,195      $  2,216,950
Unisite, Inc., 8.5%(2)                                1,080           581,386
- -----------------------------------------------------------------------------
                                                                 $  2,798,336
- -----------------------------------------------------------------------------
Containers and Packaging -- 0.4%
- -----------------------------------------------------------------------------
Packaging Corp. of America, 12.375%
(PIK)(1)                                             13,000      $  1,417,000
- -----------------------------------------------------------------------------
                                                                 $  1,417,000
- -----------------------------------------------------------------------------
Electronic Equipment -- 0.3%
- -----------------------------------------------------------------------------
Jordan Telecom Products, Inc., 13.25%
(PIK)                                                   906      $    906,000
- -----------------------------------------------------------------------------
                                                                 $    906,000
- -----------------------------------------------------------------------------
Machinery -- 0.0%
- -----------------------------------------------------------------------------
MMH Holdings, Inc., 12% (PIK)                           431      $     64,650
- -----------------------------------------------------------------------------
                                                                 $     64,650
- -----------------------------------------------------------------------------
Oil and Gas - Equipment and Services -- 0.5%
- -----------------------------------------------------------------------------
R&B Falcon Corp.                                      1,661      $  1,577,950
- -----------------------------------------------------------------------------
                                                                 $  1,577,950
- -----------------------------------------------------------------------------
Wireless Communication Services -- 1.1%
- -----------------------------------------------------------------------------
Dobson Communications Corp., 12.25%
(PIK)                                                 1,135      $  1,021,500
Nextel Communications, Inc., 11.125%
(PIK)                                                 1,414         1,357,440
Rural Cellular Corp., 11.375% (PIK)                   1,148         1,170,960
- -----------------------------------------------------------------------------
                                                                 $  3,549,900
- -----------------------------------------------------------------------------
                SECURITY                        SHARES           VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------
Wireline Communication Services -
International -- 0.9%
- -----------------------------------------------------------------------------
Global Crossing Holding, Ltd., 10.5%                  2,800      $  2,954,000
- -----------------------------------------------------------------------------
                                                                 $  2,954,000
- -----------------------------------------------------------------------------
Wireline Communication Services -
North America -- 1.3%
- -----------------------------------------------------------------------------
E.spire Communications, Inc., 12.75%
(PIK)                                                 1,251      $    387,810
Intermedia Communications, Inc., 7%
(PIK)(1)                                             45,000           956,250
IXC Communications, Inc., Series B,
12.5% (PIK)                                           2,620         2,764,100
Nextlink Communications, Inc., 14% (PIK)              5,960           295,020
- -----------------------------------------------------------------------------
                                                                 $  4,403,180
- -----------------------------------------------------------------------------
Total Preferred Stocks
   (identified cost $26,497,037)                                 $ 24,788,465
- -----------------------------------------------------------------------------
SHORT-TERM INVESTMENTS -- 9.3%

                                                PRINCIPAL
                                                AMOUNT
                SECURITY                        (000'S OMITTED)  VALUE
<S>                                       <C>   <C>              <C>
- -----------------------------------------------------------------------------
Associates Corp., 5.55%, 10/1/99                    $12,867      $ 12,867,000
General Electric Capital Co., 5.55%,
10/1/99                                              13,000        13,000,000
Prudential Funding Corp., 5.29%, 10/7/99              5,000         4,995,592
- -----------------------------------------------------------------------------
Total Short-Term Investments
   (at amortized cost, $30,862,592)                              $ 30,862,592
- -----------------------------------------------------------------------------
Total Investments -- 101.5%
   (identified cost $349,895,213)                                $336,245,427
- -----------------------------------------------------------------------------
Other Assets, Less Liabilities -- (1.5)%                         $ (4,882,523)
- -----------------------------------------------------------------------------
Net Assets -- 100.0%                                             $331,362,904
- -----------------------------------------------------------------------------
</TABLE>

(PIK) - Payment in kind.

EUR - Euro Dollar

GBP - British Pound

DEM - Deutche Mark

(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.
(2)  Restricted security.
(3)  Non-income producing security.

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       12
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

FINANCIAL STATEMENTS

STATEMENT OF ASSETS AND LIABILITIES

<TABLE>
<CAPTION>
AS OF SEPTEMBER 30, 1999
<S>                                       <C>
Assets
- ------------------------------------------------------
Investments, at value (identified cost,
   $349,895,213)                          $336,245,427
Cash                                             4,411
Receivable for investments sold              2,199,039
Receivable for Fund shares sold              1,665,971
Interest receivable                          6,932,301
- ------------------------------------------------------
TOTAL ASSETS                              $347,047,149
- ------------------------------------------------------

Liabilities
- ------------------------------------------------------
Payable for investments purchased         $ 13,103,094
Dividends payable                            1,429,823
Payable for open forward foreign
   currency contracts                          507,149
Payable for Fund shares redeemed               404,918
Payable to affiliate for Trustees' fees            979
Payable to affiliate for service fees           13,991
Accrued expenses                               224,291
- ------------------------------------------------------
TOTAL LIABILITIES                         $ 15,684,245
- ------------------------------------------------------
NET ASSETS                                $331,362,904
- ------------------------------------------------------
Sources of Net Assets
- ------------------------------------------------------
Paid-in capital                           $351,501,808
Accumulated net realized loss (computed
   on the basis of identified cost)         (6,941,249)
Accumulated undistributed net investment
   income                                      960,248
Net unrealized depreciation (computed on
   the basis of identified cost)           (14,157,903)
- ------------------------------------------------------
TOTAL                                     $331,362,904
- ------------------------------------------------------
Class A Shares
- ------------------------------------------------------
NET ASSETS                                $331,129,898
SHARES OUTSTANDING                          40,581,913
NET ASSET VALUE AND REDEMPTION PRICE PER
   SHARE
   (net assets  DIVIDED BY shares of
      beneficial interest outstanding)    $       8.16
MAXIMUM OFFERING PRICE PER SHARE
   (100  DIVIDED BY 95.25 of $8.16)       $       8.57
- ------------------------------------------------------
Class I Shares
- ------------------------------------------------------
NET ASSETS                                $    233,006
SHARES OUTSTANDING                              24,002
NET ASSET VALUE, OFFERING PRICE AND
   REDEMPTION PRICE PER SHARE
   (net assets  DIVIDED BY shares of
      beneficial interest outstanding)    $       9.71
- ------------------------------------------------------
</TABLE>

On sales of $25,000 or more, the offering price of Class A shares is reduced.

STATEMENT OF OPERATIONS

<TABLE>
<CAPTION>
FOR THE YEAR ENDED
SEPTEMBER 30, 1999
<S>                                       <C>
Investment Income
- -----------------------------------------------------
Interest                                  $27,251,412
Dividends                                   2,555,106
Other                                         531,899
- -----------------------------------------------------
TOTAL INVESTMENT INCOME                   $30,338,417
- -----------------------------------------------------

Expenses
- -----------------------------------------------------
Investment adviser fee                    $ 1,718,739
Trustees fees and expenses                     25,082
Service fees
   Class A                                    414,137
Transfer and dividend disbursing agent
   fees                                       292,254
Registration fees                              45,173
Legal and accounting services                  37,558
Printing and postage                           30,227
Custodian fee                                 195,891
Miscellaneous                                  25,140
- -----------------------------------------------------
TOTAL EXPENSES                            $ 2,784,201
- -----------------------------------------------------

NET INVESTMENT INCOME                     $27,554,216
- -----------------------------------------------------

Realized and Unrealized Gain (Loss)
- -----------------------------------------------------
Net realized gain (loss) --
   Investment transactions (identified
      cost basis)                         $  (193,314)
   Foreign currency and forward foreign
      currency exchange contract
      transactions                            605,898
- -----------------------------------------------------
NET REALIZED GAIN                         $   412,584
- -----------------------------------------------------
Change in unrealized appreciation
   (depreciation) --
   Investments (identified cost basis)    $ 1,238,849
   Foreign currency and forward foreign
      currency exchange contracts            (509,439)
- -----------------------------------------------------
NET CHANGE IN UNREALIZED APPRECIATION
   (DEPRECIATION)                         $   729,410
- -----------------------------------------------------

NET REALIZED AND UNREALIZED GAIN          $ 1,141,994
- -----------------------------------------------------

NET INCREASE IN NET ASSETS FROM
   OPERATIONS                             $28,696,210
- -----------------------------------------------------
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       13
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

FINANCIAL STATEMENTS CONT'D

STATEMENTS OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
Increase (Decrease) in                    YEAR ENDED          YEAR ENDED
NET ASSETS                                SEPTEMBER 30, 1999  SEPTEMBER 30, 1998
<S>                                       <C>                 <C>
- --------------------------------------------------------------------------------
From operations --
   Net investment income                  $       27,554,216  $       20,983,148
   Net realized gain                                 412,584           7,819,473
   Net change in unrealized appreciation
      (depreciation)                                 729,410         (28,049,375)
- --------------------------------------------------------------------------------
NET INCREASE IN NET ASSETS FROM
   OPERATIONS                             $       28,696,210  $          753,246
- --------------------------------------------------------------------------------
Distributions to shareholders --
   From net investment income
      Class A                             $      (26,817,740) $      (20,370,292)
      Class I                                         (3,186)                 --
- --------------------------------------------------------------------------------
TOTAL DISTRIBUTIONS TO SHAREHOLDERS       $      (26,820,926) $      (20,370,292)
- --------------------------------------------------------------------------------
Transactions in shares of beneficial interest --
   Proceeds from sale of shares
      Class A                             $      171,390,929  $       98,227,680
      Class I                                        243,469                  --
   Net asset value of shares issued to
      shareholders in payment
      ofdistributions declared
      Class A                                     12,868,702           9,645,120
      Class I                                          1,187                  --
   Cost of shares redeemed
      Class A                                    (79,969,507)        (70,817,921)
      Class I                                         (6,997)                 --
- --------------------------------------------------------------------------------
NET INCREASE IN NET ASSETS FROM FUND
   SHARE TRANSACTIONS                     $      104,527,783  $       37,054,879
- --------------------------------------------------------------------------------

NET INCREASE IN NET ASSETS                $      106,403,067  $       17,437,833
- --------------------------------------------------------------------------------

Net Assets
- --------------------------------------------------------------------------------
At beginning of year                      $      224,959,837  $      207,522,004
- --------------------------------------------------------------------------------
AT END OF YEAR                            $      331,362,904  $      224,959,837
- --------------------------------------------------------------------------------

Accumulated undistributed
(distributions in excess of)
net investment income included
in net assets
- --------------------------------------------------------------------------------
AT END OF YEAR                            $          960,248  $         (398,049)
- --------------------------------------------------------------------------------
</TABLE>

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       14
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

FINANCIAL STATEMENTS CONT'D

FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>
                                                    CLASS A
                                ------------------------------------------------
                                            YEAR ENDED SEPTEMBER 30,
                                ------------------------------------------------
                                  1999      1998      1997      1996      1995
<S>                             <C>       <C>       <C>       <C>       <C>
- --------------------------------------------------------------------------------
Net asset value -- Beginning
   of year                      $8.030    $8.700    $8.120    $7.920    $  7.900
- --------------------------------------------------------------------------------

Income (loss) from operations
- --------------------------------------------------------------------------------
Net investment income           $0.830    $0.810    $0.790    $0.800    $  0.820
Net realized and unrealized
   gain (loss)                   0.110    (0.700)    0.570     0.210       0.020
- --------------------------------------------------------------------------------
TOTAL INCOME FROM OPERATIONS    $0.940    $0.110    $1.360    $1.010    $  0.840
- --------------------------------------------------------------------------------

Less distributions
- --------------------------------------------------------------------------------
From net investment income      $(0.810 ) $(0.780 ) $(0.770 ) $(0.800 ) $ (0.820)
In excess of net investment
   income                           --        --    (0.010)   (0.010)         --
- --------------------------------------------------------------------------------
TOTAL DISTRIBUTIONS             $(0.810 ) $(0.780 ) $(0.780 ) $(0.810 ) $ (0.820)
- --------------------------------------------------------------------------------

NET ASSET VALUE -- END OF
   PERIOD                       $8.160    $8.030    $8.700    $8.120    $  7.920
- --------------------------------------------------------------------------------

TOTAL RETURN(1)                  11.97%     0.98%    17.68%    13.41%      11.25%
- --------------------------------------------------------------------------------

Ratios/Supplemental Data
- --------------------------------------------------------------------------------
Net assets, end of year (000's
   omitted)                     $331,130  $224,960  $207,522  $143,844  $106,414
Ratios (As a percentage of
   average daily net assets):
   Expenses                       1.01%     1.04%     1.05%     1.07%       1.09%
   Net investment income          9.97%     9.22%     9.32%     9.96%      10.50%
Portfolio Turnover                 132%      141%      105%       81%         84%
- --------------------------------------------------------------------------------
</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.

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       15
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

FINANCIAL STATEMENTS CONT'D

FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>
                                         CLASS I
                                -------------------------
                                PERIOD ENDED
                                SEPTEMBER 30, 1999(1)
<S>                             <C>
- ---------------------------------------------------------
Net asset value -- Beginning
   of year                              $ 10.000
- ---------------------------------------------------------

Income (loss) from operations
- ---------------------------------------------------------
Net investment income                   $  0.250
Net realized and unrealized
   loss                                   (0.290)(2)
- ---------------------------------------------------------
TOTAL INCOME (LOSS) FROM
   OPERATIONS                           $ (0.040)
- ---------------------------------------------------------

Less distributions
- ---------------------------------------------------------
From net investment income              $ (0.250)
- ---------------------------------------------------------
TOTAL DISTRIBUTIONS                     $ (0.250)
- ---------------------------------------------------------

NET ASSET VALUE -- END OF
   PERIOD                               $  9.710
- ---------------------------------------------------------

TOTAL RETURN(3)                            (0.44)%
- ---------------------------------------------------------

Ratios/Supplemental Data
- ---------------------------------------------------------
Net assets, end of year (000's
   omitted)                             $    233
Ratios (As a percentage of
   average daily net assets):
   Expenses                                 0.89%(4)
   Net investment income                   10.12%(4)
Portfolio Turnover                           132%
- ---------------------------------------------------------
</TABLE>

(1)  For the period from the commencement of offering of Class I shares, July 1,
     1999, to September 30, 1999.
(2)  The per share amount is not in accord with the net realized and unrealized
     gain (loss) on investments for the period because of the timing of sales of
     Fund Shares and the amount of the per share realized and unrealized gains
     and losses at such time.
(3)  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.
(4)  Annualized.

                       SEE NOTES TO FINANCIAL STATEMENTS

                                       16
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

NOTES TO FINANCIAL STATEMENTS

1 Significant Accounting Policies
- -------------------------------------------
   Eaton Vance Income Fund of Boston (the Trust), a Massachusetts business
   trust, is registered under the Investment Company Act of 1940, as amended, as
   a diversified, open-end, management investment company. The Fund offers two
   classes of shares: Class A shares and, effective July 1, 1999, Class I
   shares. Class A shares are generally sold subject to a sales charge imposed
   at the time of purchase; Class I shares are sold at net asset value. Each
   class represents a pro rata interest in the Fund, but votes separately on
   class-specific matters and (as noted below) is subject to different expenses.
   Realized and unrealized gains and losses 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. Net investment income, other than class specific expenses, is
   allocated daily to each class of shares based upon the ratio of the value of
   each class' paid shares to the total value of all paid shares. Each class of
   shares differs in its distribution plan and certain other class specific
   expenses. The following is a summary of significant accounting policies
   consistently followed by the Trust in the preparation of its financial
   statements. The policies are in conformity with generally accepted accounting
   principles.

 A Investment Valuations -- Investments listed on securities exchanges or NASDAQ
   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. Short-term obligations, maturing
   in sixty days or less, are valued at amortized cost, which approximates
   value. Investments for which there is no quotation or valuation 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.

 C Federal Taxes -- The Trust's policy is to comply with the provisions of the
   Internal Revenue Code applicable to regulated investment companies and to
   distribute to shareholders all of its taxable income, including any net
   realized gain on investments. Accordingly, no provision for federal income or
   excise tax is necessary. At September 30, 1999, the Trust, for federal income
   tax purposes, had a capital loss carryover of $4,490,056 which will reduce
   the Trust's taxable income arising from future net realized gains on
   investments, if any, to the extent permitted by the Internal Revenue Code,
   and thus will reduce the amount of the distributions to shareholders which
   would otherwise be necessary to relieve the Trust of any liability for
   federal income or excise tax. Such capital loss carryover will expire on
   September 30, 2000 ($2,042,401), 2003 ($1,177) and 2004 ($2,446,478). At
   September 30, 1999 net capital losses of $2,038,773 attributable to security
   transactions incurred after October 31, 1998, are treated as arising on the
   first day of the Trust's next taxable year.

 D 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.

 E Expense Reduction -- Investors Bank & Trust Company (IBT) serves as custodian
   to the Trust. Pursuant to the respective custodian agreements, IBT receives a
   fee reduced by credits which are determined based on the average daily cash
   balances the Trust maintains with IBT. All significant credit balances used
   to reduce the Trust's custodian fees are reported as a reduction of expenses
   on the Statement of Operations. For the year ended September 30, 1999, $3,926
   credit balances were used to reduce the Trust's custodian fee.

 F Other -- Investment transactions are accounted for on the date the
   investments are purchased or sold. Gains and losses on securities sold are
   determined on the basis of identified cost.

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

                                       17
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

NOTES TO FINANCIAL STATEMENTS CONT'D

2 Distributions to Shareholders
- -------------------------------------------
   The net investment income of the Trust is determined daily, and substantially
   all of the net investment income so determined is declared daily as a
   dividend to shareholders of record at the time of declaration. Distributions
   are 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 Trust at the net asset value as of the ex-dividend
   date. Distributions are paid in the form of additional shares of the Trust
   or, at the election of the shareholder, in cash. The Trust distinguishes
   between distributions on a tax basis and a financial reporting basis.
   Generally accepted accounting principles require that only distributions in
   excess of tax basis earnings and profits be reported in the financial
   statements as a return of capital. Differences in the recognition or
   classification of income between the financial statements and tax earnings
   and profits which result in temporary over-distributions for financial
   statement purposes are classified as distributions in excess of net
   investment income or accumulated net realized gains. Permanent differences
   between book and tax accounting relating to distributions are reclassified to
   paid-in capital.

3 Shares of Beneficial Interest
- -------------------------------------------
   The Declaration of Trust permits the Trustees to issue an unlimited number of
   full and fractional shares of beneficial interest (without par value).
   Transactions in Fund shares were as follows:

<TABLE>
<CAPTION>
                                              YEAR ENDED SEPTEMBER 30,
                                              ------------------------
    CLASS A                                   1999         1998
    <S>                                       <C>          <C>
    ------------------------------------------------------------------
    Sales                                      20,633,005   11,188,933
    Issued to shareholders electing to
     receive payment of distributions in
     Trust shares                               1,551,930    1,110,097
    Redemptions                                (9,633,789)  (8,116,055)
    ------------------------------------------------------------------
    NET INCREASE                               12,551,146    4,182,975
    ------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                              PERIOD ENDED
    CLASS I                                   SEPTEMBER 30, 1999(1)
    <S>                                       <C>
    ---------------------------------------------------------------
    Sales                                                    24,598
    Issued to shareholders electing to
     receive
     payment of distributions in Trust shares                    122
    Redemptions                                                (718)
    ---------------------------------------------------------------
    NET INCREASE                                             24,002
    ---------------------------------------------------------------
</TABLE>

    (1)  For the period from the commencement of offering of Class I
         shares, July 1, 1999 to September 30, 1999.

4 Investment Adviser Fee and Other Transactions with Affiliates
- -------------------------------------------
   The investment adviser fee, computed at a monthly rate of 5/96 of 1% (0.625%
   annually) of the Trust's average daily net assets, was earned by Eaton Vance
   Management (EVM) as compensation for management and investment advisory
   services rendered to the Trust. Except as to Trustees of the Trust who are
   not members of EVM's organization, officers and Trustees receive remuneration
   for their services to the Trust out of such investment adviser fee. The Fund
   was informed that Eaton Vance Distributors, Inc. (EVD), a subsidiary of EVM
   and the Trust's principal underwriter, received approximately $200,000 of the
   sales charge on sales of Class A shares during the year ended September 30,
   1999. Certain officers and Trustees of the Trust are officers of the above
   organizations.

5 Service Plan
- -------------------------------------------
   The Trustees on behalf of Class A of the Trust have adopted a Service Plan
   (the Plan). The Service Plan provides that the Class A shares may make
   service fee payments to EVD, investment dealers or other persons in amounts
   not exceeding 0.25% of the Class A share's average daily net assets for any
   fiscal year. The Trustees have initially implemented the Plan by authorizing
   the Trust to make quarterly service fee payments to EVD and investment
   dealers in amounts not expected to exceed 0.25% of that portion of the
   Trust's average daily net assets for any fiscal year which is attributable to
   Class A shares of the Trust sold on or after May 22, 1989 by such persons and
   remaining outstanding for at least twelve months. Such payments are made for
   personal services and/or the maintenance of shareholder accounts. Pursuant to
   the Plan, the Trust paid or accrued $414,137 for Class A shares under the
   Plan to EVD and investment dealers during the year ended September 30, 1999.

6 Financial Instruments
- -------------------------------------------
   The Trust regularly trades in financial instruments with off-balance sheet
   risk in the normal course of its investing activities to assist in managing
   exposure to various market risks. These financial instruments include written
   options, forward foreign currency exchange contracts and financial futures
   contracts and may involve, to a varying degree, elements of risk in excess of
   the amounts recognized for financial statement purposes. The notional or
   contractual amounts of these instruments represent the investment the Trust
   has in particular classes of financial instruments and does not necessarily
   represent the amounts potentially subject to risk. The measurement of the
   risks associated with these instruments is meaningful only when all related
   and offsetting transactions are considered.

                                       18
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

NOTES TO FINANCIAL STATEMENTS CONT'D

   A summary of obligations under these financial instruments at September 30,
   1999 is as follows:

   FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS

<TABLE>
<CAPTION>
                                             SALES
    ----------------------------------------------------------------------------------------
    SETTLEMENT                                             IN EXCHANGE FOR    NET UNREALIZED
    DATE         DELIVER                                   (IN U.S. DOLLARS)  DEPRECIATION
    <C>          <S>                                       <C>                <C>
    ----------------------------------------------------------------------------------------
      11/19/99   British Pound Sterling
                 5,086,447                                        8,150,522         (225,838)
      11/19/99-  European Currency Unit
      11/22/99   14,687,548                                      15,432,367         (281,311)
    ----------------------------------------------------------------------------------------
                                                            $    23,582,889   $     (507,149)
    ----------------------------------------------------------------------------------------
</TABLE>

7 Line of Credit
- -------------------------------------------
   The Trust participates with other funds and portfolios managed by Boston
   Management Research (BMR) and EVM and its affiliates in a $130 million
   unsecured line of credit agreement with a group of banks. The Trust may
   temporarily borrow from the line of credit to satisfy redemption requests or
   settle investment transactions. Interest is charged to each fund or portfolio
   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 funds and portfolios at the end of each quarter. The Trust did
   not have any significant borrowings or allocated fees during the year ended
   September 30, 1999.

8 Purchases and Sales of Investments
- -------------------------------------------
   The Trust invests primarily in debt securities. The ability of the issuers of
   the debt securities held by the Trust 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 $422,164,718 and $344,587,848, respectively, for the
   year ended September 30, 1999.
9 Federal Income Tax Basis of Investments
- -------------------------------------------
   The cost and unrealized appreciation/depreciation in value of the investment
   securities at September 30, 1999, as computed on a federal income tax basis,
   were as follows:

<TABLE>
    <S>                                       <C>
    AGGREGATE COST                            $350,307,634
    ------------------------------------------------------
    Gross unrealized appreciation             $  5,146,826
    Gross unrealized depreciation              (19,209,033)
    ------------------------------------------------------
    NET UNREALIZED DEPRECIATION               $(14,062,207)
    ------------------------------------------------------
</TABLE>

10 Restricted Securities
- -------------------------------------------
   At September 30, 1999, the Trust owned the following securities (representing
   0.36% of net assets) which were restricted as to public resale and not
   registered under the Securities Act of 1933. The Trust has various
   registration rights (exercisable under a variety of circumstances) with
   respect to 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.

<TABLE>
<CAPTION>
                                              DATE OF                             FAIR
    DESCRIPTION                               ACQUISITION  SHARES/FACE  COST      VALUE
    <S>                                       <C>          <C>          <C>       <C>
    --------------------------------------------------------------------------------------
    COMMON STOCKS, WARRANTS AND RIGHTS
    --------------------------------------------------------------------------------------
    Carrier1, Warrants                            9/09/99        3,500  $      0  $     35
    Diva Systems Corp., Warrants                 12/30/98-       6,750        22         0
                                                  9/24/99
    HF Holdings, Inc., Warrants                   9/27/99        3,400   182,579         0
    Jordan Telecom Products, Inc., Common         1/30/98          700         0         0
    Key Energy Services, Inc., Warrants           7/14/99        1,000    15,000    15,000
    OpTel, Inc., Common                          10/21/97-       1,460        10       197
                                                 10/22/97
    Pegasus Communications Corp., Warrants       12/02/98        1,410    26,370    74,011
    Peninsula Gaming LLC, Warrants                8/19/99        6,338         0    38,027
    Primus Telecom Group, Warrants, Exp.
     8/1/04                                      10/31/97        1,150         0    29,261
    Specialty Foods Acquisition Corp.,
     Common                                       8/10/93       12,000     8,722       120
    SpinCycle, Inc., Warrants                     4/24/98          850         0         0
    Tele1 Europe BV, Warrants                     9/23/99          600         0    42,000
    UIH Australia/Pacific, Inc., Warrants         3/05/98          900         0         9
    Unisite, Inc., Warrants                      12/09/97          750         0         0
    Versatel Telecom B.V., Warrants               8/11/98-       3,500         0   399,541
                                                  1/29/99
    --------------------------------------------------------------------------------------
                                                                        $232,703  $598,192
    --------------------------------------------------------------------------------------
    PREFERRED STOCKS
    --------------------------------------------------------------------------------------
    Unisite, Inc., 8.5%                          12/19/97        1,080   499,949   581,386
    --------------------------------------------------------------------------------------
                                                                        $499,949  $581,386
    --------------------------------------------------------------------------------------
</TABLE>

                                       19
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

INDEPENDENT ACCOUNTANTS' REPORT

TO THE TRUSTEES AND SHAREHOLDERS
OF EATON VANCE INCOME FUND OF BOSTON:
- ---------------------------------------------

In our opinion, the accompanying statement of assets and liabilities, including
the portfolio of investments, and the related statements of operations and of
changes in net assets and the financial highlights present fairly, in all
material respects, the financial position of the Eaton Vance Income Fund of
Boston (the "Fund") at September 30, 1999 and the results of its operations, the
changes in its net assets and the financial highlights for the periods
indicated, in conformity with generally accepted accounting principles. These
financial statements and financial highlights (hereafter referred to as
"financial statements") are the responsibility of the Fund's management; our
responsibility is to express an opinion on these financial statements based on
our audits. We conducted our audits of these financial statements in accordance
with generally accepted auditing standards which require that we plan and
perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements, assessing the accounting principles used and significant estimates
made by management, and evaluating the overall financial statement presentation.
We believe that our audits, which included confirmation of securities at
September 30, 1999 by correspondence with the custodian and brokers, provide a
reasonable basis for the opinion expressed above.

PricewaterhouseCoopers LLP
Boston, Massachusetts
November 8, 1999

                                       20
<PAGE>
EATON VANCE INCOME FUND OF BOSTON AS OF SEPTEMBER 30, 1999

INVESTMENT MANAGEMENT

EATON VANCE INCOME FUND OF BOSTON

Officers

James B. Hawkes
President and Trustee

Michael W. Weilheimer
Vice President and
Portfolio Manager

James L. O'Connor
Treasurer

Alan R. Dynner
Secretary

Trustees

Donald R. Dwight
President, Dwight Partners, Inc.

Robert Gluck
Management Consultant

Samuel L. Hayes, III
Jacob H. Schiff Professor of Investment
Banking Emeritus, Harvard University
Graduate School of Business Administration

Norton H. Reamer
Chairman and Chief Executive Officer,
United Asset Management Corporation

                                       21
<PAGE>
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<PAGE>
                       THIS PAGE INTENTIONALLY LEFT BLANK
<PAGE>

Investment Adviser of Eaton Vance
Income Fund of Boston
Eaton Vance Management
The Eaton Vance Building
255 State Street
Boston, MA 02109

Principal Underwriter
Eaton Vance Distributors, Inc.
The Eaton Vance Building
255 State Street
Boston, MA 02109
(617) 482-8360

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

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

Independent Accountants
PricewaterhouseCoopers LLP
160 Federal Street
Boston, MA 02110




Eaton Vance Income Fund of Boston
The Eaton Vance Building
255 State Street
Boston, MA 02109




- --------------------------------------------------------------------------------
   This report must be preceded or accompanied by a current prospectus which
 contains more complete information on the Fund including its sales charges and
expenses. Please read the prospectus carefully before you invest or send money.
- --------------------------------------------------------------------------------
4-2681-9/99                                                           IBSRC-9/99


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