KEYSTONE DIVERSIFIED BOND FUND B-2
N-30D, 1996-10-29
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[front cover]

                                K E Y S T O N E

                [photo of lighthouse on cliff overlooking ocean]

                                  DIVERSIFIED
                                BOND FUND (B-2)

                                [Keystone logo]

                                 ANNUAL REPORT
                                AUGUST 31, 1996

<PAGE>

PAGE 1 

Keystone Diversified Bond Fund (B-2) 
Seeks maximum income without undue risk of principal. 

Dear Shareholder: 

We are writing to report to you on the performance of Keystone Diversified 
Bond Fund (B-2) for the Fund's fiscal year which ended August 31, 1996. 
Following our report we have included a discussion with your Fund's 
management team and complete financial information. 

Performance 

Your Fund returned 4.03% for the twelve-month period which ended August 31, 
1996. The Lehman Aggregate Bond Index, a broad-based index of corporate, 
government and mortgage-backed securities, returned 4.09% for the same 
twelve-month period. Your Fund's relative performance was particularly strong 
during the last six months of the period when it returned 0.70%; the Lehman 
Aggregate Bond Index returned -0.03% for the same six-month period. These 
return figures include price changes and reinvested dividends. 

  We were pleased with your Fund's performance, especially during the second 
half of the twelve-month period. 

  Keystone Diversified Bond Fund (B-2) is a flexible fund focused on seeking 
maximum income without undue risk of principal. The Fund seeks this objective 
by investing primarily in corporate and government bonds, mortgage-backed 
securities and foreign bonds. We believe the Fund's ability to invest in a 
wide range of fixed-income securities provided valuable diversification and 
flexibility during the changing environment of the last twelve months. 

Market environment 

In the second half of 1995, the economy grew at a slow-to-moderate pace, 
corporate profits remained strong, and inflation was under control. This was 
a favorable environment for bonds. The yield on the benchmark 30-year 
Treasury bond declined from 6.65% on August 31, 1995 to below 6% at the 
beginning of 1996. As yields declined, bond prices rose. 

  In the first quarter of 1996, this environment changed. There were 
increasing concerns that the economy might be growing more rapidly than 
expected. In March monthly unemployment figures were reported substantially 
lower than expected. This was a turning point for the bond market as economic 
statistics in subsequent months confirmed stronger growth in the first half 
of 1996. As a result, yields rose, with the 30-year Treasury reaching 7.12% 
by August 30. 

  As yields rose in the U.S., the opposite was true overseas. In Europe and 
Japan, the economic environment remained subdued despite an easing of 
monetary policies by some central banks to stimulate growth. While the U.S. 
economy was strong during the first half of 1996, many countries continued to 
struggle with slow economic growth. We believe this created an opportunity to 
benefit from rising bond prices in selected foreign markets. 

Investment strategy 

As interest rates rose in the first quarter of 1996, we employed several 
strategies that were aimed at protecting income and minimizing price 
declines. We decreased our U.S. Treasury holdings and increased holdings of 
mortgage-backed securities. These securities historically have provided more 
attractive income and better price protection in a rising interest rate 
environment. We also saw opportunities abroad to increase diversification and 
quality by adding government bonds from Spain, Germany and Canada. These 
bonds were protected from currency fluctuations by hedging the positions into 
U.S. dollars. 

                                                                 --continued-- 

<PAGE> 

PAGE 2 

Keystone Diversified Bond Fund (B-2) 

Our outlook 

We expect a favorable environment for bonds in the fourth quarter of 1996 
both in the U.S. and in selected foreign markets. We believe concerns about 
revived inflationary pressures in the U.S. have been overstated and the 
economy should eventually slow in the fourth quarter. However, there is the 
potential for some short-term price volatility. Overseas, we expect the 
economic environment in industrialized countries to remain slow, but improve 
over 1995. 

  We believe your Fund's flexible approach to invest in nearly any sector of 
the bond market can be particularly valuable in a changing environment. This 
flexibility allows us to take advantage of attractive income opportunities 
and provide diversification. At Keystone, we conduct intensive credit 
research on securities we select for the portfolio. We build upon these 
individual selections by carefully analyzing sectors, markets, and the 
overall economic environment as we allocate portfolio assets. We believe that 
this approach can provide the potential for attractive income and total 
returns over the long term. 

  We are pleased to inform you that Keystone has agreed to be acquired by 
First Union Corporation. The acquisition is subject to a number of 
conditions, including approvals of investment advisory agreements with 
Keystone by fund shareholders. First Union is a financial services firm based 
in Charlotte, North Carolina. It is the nation's sixth largest bank holding 
company with assets of approximately $140 billion. First Union, through its 
wholly-owned subsidiary Evergreen Asset Management Corp., manages more than 
$16 billion in 36 mutual funds. Keystone will remain a separate entity after 
its acquisition and will continue to provide investment advisory and 
management services to the Fund. We believe First Union's acquisition of 
Keystone should strengthen the investment management services we provide to 
you. 

  Thank you for your continued support of Keystone Diversified Bond Fund 
(B-2). If you have any questions or comments about your investment, we 
encourage you to write to us. 

Sincerely, 

/s/Albert H. Elfner, III
Albert H. Elfner, III 
Chairman and President 
Keystone Investments, Inc. 

/s/George S. Bissell
George S. Bissell 
Chairman of the Board 
Keystone Funds 

October 1996           [Photos of Albert H. Elfner, III and George S. Bissell] 

                                  Albert H. Elfner, III     George S. Bissell 

<PAGE> 

PAGE 3 

                              A Discussion With 
                              Your Fund Manager 

                       [photo of Christopher P. Conkey] 

 Christopher P. Conkey is portfolio manager of your Fund and heads 
  Keystone's high grade bond team. A Chartered Financial Analyst, 
    Mr. Conkey has 13 years of experience managing fixed-income 
 investments. He holds a BA in economics from Clark University and 
an MBA in finance from Boston University. Together with high yield 
 portfolio manager Kristine Cloyes, and domestic analysts David J. 
 Bowers and Gary E. Pzegeo, and international bond analyst Richard 
  Wisentaner, the team evaluates credit quality and the economic 
           environment in selecting bonds for your Fund. 

Q  What was the environment like for bonds over the last twelve months? 

A  In the U.S., the bond market experienced two different investment 
climates. In the second half of 1995, interest rates declined and bond prices 
rose. However, the environment changed in the first quarter of 1996, as 
stronger than expected economic growth caused interest rates to rise and bond 
prices to decline. This growth, led by strong employment and consumer 
spending reports, stimulated concerns about an acceleration of the inflation 
rate. Bonds endured some price volatility as investors tried to get a clearer 
picture of the economy. So far this strength has not rekindled inflation. 
Inflation has remained well contained, and we expect that to continue in the 
foreseeable future. 

Q  What was your asset allocation at the end of the period? 

A  As of August 31, 1996, your Fund's asset allocation was 49.9% corporate 
bonds, 20.1% mortgage-backed securities, 19.2% foreign bonds, 8.9% U.S. 
government securities and 1.9% cash and other assets and liabilities (see 
chart on page four). At the end of the period the Fund's average maturity was 
11 years. During the twelve-month period, we focused on upgrading the Fund's 
high yield holdings and increasing your Fund's foreign component. 

Q  How did you manage the Fund in this changing environment? 

A  The biggest structural change for the Fund was our establishment of a 
position in the foreign sector. We invested in the government bonds of 
Canada, Spain and Germany. These are high quality bonds which represent 
countries with large, liquid securities markets. Further, the transactions 
were hedged into U.S. dollars to help limit the effects of foreign currency 
fluctuations. The Fund's foreign sector has recently benefitted from an 
easing of monetary policy in each of these countries. 

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

Fund Profile 
Objective: Seeks maximum income without undue risk of principal. 
Commencement of investment operations: September 11, 1935 
Average maturity: 11 years 
Average quality: A 
Net assets: $560 million 
Newspaper listing: "DivrB2" 

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

<PAGE> 

PAGE 4 

Keystone Diversified Bond Fund (B-2) 

[typeset representation of pie chart] 

Asset Allocation 
as of August 31, 1996 

Corporate bonds                      (49.9%) 
Mortgage-backed securities           (20.1%) 
Foreign bonds (non-U.S.$)            (17.0%) 
U.S. government obligations           (8.9%) 
Foreign bonds (U.S.$)                 (2.2%) 
Cash(1)                               (1.9%) 

(as a percentage of net assets) 

[end pie chart] 

Q  What made you choose these countries? 

A  Canada has solid economic fundamentals and low inflation. Spain and 
Germany are undergoing what we consider to be positive economic, political 
and social changes. They are striving to meet the standards required for 
European monetary unification in 1997, as outlined in the Maastricht 
agreement. Their policies have continually demonstrated the fiscal constraint 
and responsibility necessary to meet those standards. We eliminated our 
holdings of Spanish government bonds and increased our holdings of German 
bonds by the end of the period because of the appreciation of Spanish bonds 
relative to German bonds. 

Q  What other strategies did you employ? 

A  A year ago, the portfolio had a larger position in U.S. Treasuries. These 
securities historically perform well when interest rates decline. We reduced 
our Treasury holdings as interest rates rose, increasing the Fund's holdings 
of mortgage-backed securities. These securities have typically outperformed 
U.S. Treasuries during periods of rising interest rates. These bonds are also 
rated AAA, the highest bond rating available, and provide higher yields than 
U.S. Treasuries. 



(1) Includes short-term obligations, common stocks, and other assets and 
liabilities. 



Q  High yield corporate bonds have been an important component of the Fund's 
strategy for some time. Did you make any changes in this sector? 

A  These holdings, which comprised 32% of net assets on August 31, 1996, tend 
to perform the best when the economy is strong and inflation is low. High 
yield bonds were strong contributors to Fund's performance during a period of 
generally falling bond prices. In fact, high yield bonds have been the best 
performing fixed income sector year-to-date through August 31, 1996. 

  We improved the quality, liquidity and diversification of the Fund's high 
yield corporate bond holdings during the period. We accomplished this by 
increasing our holdings of higher rated bonds, primarily bonds rated BB. 
Bonds with BB ratings are considered the highest quality in the high yield 
sector. As of August 31, 1996, about 19% of the Fund's high yield holdings 
were rated BB. 

  We also improved the liquidity of our high yield holdings. We eliminated the 
Fund's investments in issues that were less than $100 million in size. 
Further, we significantly increased the portfolio's position in issues that 
totaled between $200 million and $300 million. 

Portfolio Quality Summary 
as of August 31, 1996 

S&P rating(2) 

[typeset representation of pie chart] 

AAA                       (30.2%) 
AA                        (21.7%) 
A                          (9.2%) 
BBB                        (5.1%) 
BB                         (6.1%) 
B                         (24.8%) 
Other(3)                   (2.9%) 

[end pie chart] 

Average portfolio quality: A 

(as a percentage of portfolio assets) 

(2) Where Standard & Poor's (S&P) ratings were not available, we have used 
    ratings from Moody's Investor Service, Inc., Fitch Investor's Service, 
    Inc. or ratings assigned by another nationally recognized statistical 
    rating organization. 

(3) Includes CCC rated bonds, unrated bonds, short-term investments, and 
    common stocks. 

<PAGE> 

PAGE 5 

  In the high yield sector, we added to the Fund's industry weightings in 
businesses that are not closely tied to fluctuations in the business cycle. 
These included the broadcasting and cable industries. 

  We emphasized these industries because we believed they represented the 
potential for significant opportunity, including acquisitions and credit 
quality upgrades. 

Q  What is your outlook for the bond market over the next six months? 

A  We expect interest rates to trend lower later this year, continuing 
through the beginning of 1997. This year's higher interest rates already 
appear to be having an impact on economic growth. We think higher rates will 
continue to slow the economy. Inflation has remained well-contained, despite 
some preliminary pressures from wages. Wage-inflation bears watching, but we 
believe that inflation will stay in the 3-3.5% range. This combination of a 
slowing economy and low inflation should provide a more favorable environment 
for bonds. Further, the Fund's ability to diversify enabled us to seek 
opportunities in a variety of fixed-income sectors. We believe this should 
help the portfolio generate attractive returns over the long term. 

Top 10 Holdings 
as of August 31, 1996 

                                                    Percentage of 
Bond/coupon/maturity date                           net assets 
- ------------------------------------------------------------------
Commonwealth of Canada, 8.750%, 2005                6.2 
- ------------------------------------------------------------------
U.S. Treasury bonds, 7.875%, 2021                   5.8 
- ------------------------------------------------------------------
Commonwealth of Canada, 7.500%, 2003                4.5 
- ------------------------------------------------------------------
Federal Republic of Germany, 6.875%, 2005           3.7 
- ------------------------------------------------------------------
MBIA, 9.375%, 2011                                  3.1 
- ------------------------------------------------------------------
U.S. Treasury bonds, 8.470%(4), 2020                3.0 
- ------------------------------------------------------------------
Federal Republic of Germany, 6.500%, 2003           2.6 
- ------------------------------------------------------------------
Zale Funding Trust, 7.325%, 1999(5)                 2.0 
- ------------------------------------------------------------------
GS Mortgage Securities Corp., 7.410%, 2027          1.9 
- ------------------------------------------------------------------
Nationwide CSN Trust, 9.875%, 2025                  1.9 
- ------------------------------------------------------------------

(4) Effective yield 

(5) Estimated maturity 

                                  [diamond] 
                      This column is intended to answer 
              questions about your Fund. If you have a question 
                  you would like answered, please write to: 
                   Keystone Investment Distributors Company 
                 Attn: Shareholder Communications, 22nd Floor 
            200 Berkeley Street, Boston, Massachusetts 02116-5034. 

<PAGE> 

PAGE 6 

Keystone Diversified Bond Fund (B2) 

Your Fund's Performance 

Growth of an investment in 
Keystone Diversified Bond Fund (B-2) 

In Thousands 

Total Value: $18,541 

[typeset representation of mountain chart]

       Initial      Reinvested
      Investment   Distributions
8/86    10000         10000 
         9417         10420 
8/88     8959         11005 
         8835         12021 
8/90     7724         11728 
         7654         12968 
8/92     8187         15157 
         8496         17087 
8/94     7610         16484 
         7515         17824 
8/96     7296         18541 

[end mountain chart]

A $10,000 investment in Keystone Diversified Bond Fund (B-2) made on August 
31, 1986 with all distributions reinvested was worth $18,541 on August 31, 
1996. Past performance is no guarantee of future results. 

Twelve-Month Performance                                as of August 31, 1996 

Total return*                 4.03% 
Net asset value 8/31/95     $15.09 
                8/31/96     $14.65 
Distributions               $ 1.04 
Capital gains                 None 

* Before deduction of contingent deferred sales charge (CDSC). 

Historical Record                                        as of August 31, 1996 

                                   If you        If you did 
Cumulative total return          redeemed        not redeem 
1-year                               1.12%             4.03% 
5-year                              42.98%            42.98% 
10-year                             85.41%            85.41% 
Average annual total return 
1-year                               1.12%             4.03% 
5-year                               7.41%             7.41% 
10-year                              6.37%             6.37% 

There is no sales charge when you buy Fund shares. The Fund currently imposes 
a contingent deferred sales charge that declines from 4% to 1% if you redeem 
shares within four years of purchase. The one-year return reflects the 
deduction of the 3% contingent deferred sales charge (CDSC) for those 
investors who sold Fund shares after one calendar year. Investors who 
retained their fund investment received the one-year return reported in the 
second column of the table. 

  The investment return and principal value will fluctuate so that your 
shares, when redeemed, may be worth more or less than the original cost. 

  You may exchange your shares to another Keystone fund for a $10 fee by 
contacting Keystone directly. The exchange fee is waived for individual 
investors who make an exchange using Keystone's Automated Response Line 
(KARL). The Fund reserves the right to change or terminate the exchange 
offer. 

<PAGE> 

PAGE 7 

Growth of an Investment 

Comparison of change in value of a $10,000 investment in Keystone Diversified 
Bond Fund (B-2), the Lehman Aggregate Bond Index and the Consumer Price 
Index. 

In Thousands                           August 31, 1986 through August 31, 1996 

                Fund Average 
             Annual Total Return 
- -------------------------------------------- 
    1 Year         5 Year         10 Year 
     1.12%          7.41%           6.37% 
[typeset representation of line chart] 

         Fund     LABI      CPI
8/86     10000    10000    10000
         10420    10097    10428
8/88     11005    10947    10848
         12021    12392    11358
8/90     11728    13285    11996
         12968    15707    12452
8/92     15157    17280    12844
         17087    19178    13200
8/94     16484    18886    13583
         17824    21021    13938
8/96     18541    21880    14312

[end line chart] 

Past performance is no guarantee of future results. The one-year return 
reflects the deduction of the Fund's 3% contingent deferred sales charge for 
shares held for more than one year. Consumer Price Index is through August 
31, 1996. 

This chart graphically compares your Fund's performance to certain investment 
indexes. It is the result of fund performance guidelines issued by the 
Securities and Exchange Commission. The intent is to provide investors with 
more information about their investment. 

Components of the chart 

The chart is composed of several lines that represent the accumulated value 
of an initial $10,000 investment for the period indicated. The lines 
illustrate a hypothetical investment in: 

1. Keystone Diversified Bond Fund (B-2) 

The Fund seeks maximum income without undue risk of principal. Total return 
quotations are stated after deducting sales charges (if applicable), fund 
expenses and transaction costs, and assumes reinvestment of all 
distributions. 

2. Lehman Aggregate Bond Index (LABI) 

The LABI is a broad-based, unmanaged fixed-income index of U.S. government, 
corporate and mortgage-backed securities. It represents the price change and 
coupon income of several thousand securities of various credit qualities and 
maturities. Securities are selected and compiled by Lehman Brothers, Inc. 
according to criteria that may be unrelated to your Fund's investment 
objective. 

3. Consumer Price Index (CPI) 

This index is a widely recognized measure of the cost of goods and services 
produced in the U.S. The index contains factors such as prices of services, 
housing, food, transportation and electricity which are compiled by the U.S. 
Bureau of Labor Statistics. The CPI is generally considered a valuable 
benchmark for investors who seek to outperform increases in the cost of 
living. 

  These indexes do not include transaction costs associated with buying and 
selling securities, and do not hold cash to meet redemptions. It would be 
difficult for most individual investors to duplicate these indexes. 

Understanding what the chart means 

The chart demonstrates your Fund's performance in relation to a well known 
investment index and to increases in the cost of living. It is important to 
understand what the chart shows and does not show. 

  This illustration is useful because it charts Fund and index performance 
over the same time frame and over a long period. Long-term performance is a 
more reliable and useful measure of performance than measurements of 
short-term returns or temporary swings in the market. Your financial adviser 
can help you evaluate fund performance in conjunction with the other 
important financial considerations such as safety, stability and consistency. 

<PAGE> 

PAGE 8 

Keystone Diversified Bond Fund (B-2) 

Limitations of the chart 

The chart, however, limits the evaluation of Fund performance in several 
ways. Because the measurement is based on total returns over an extended 
period of time, the comparison often favors those funds which emphasize 
capital appreciation when the market is rising. Likewise, when the market is 
declining, the comparison usually favors those funds which take less risk. 

Performance can be distorted 

Funds which are more conservative in their orientation and which place an 
emphasis on capital preservation will tend to compare less favorably when the 
market is rising. In addition, funds which have income as one of their 
objectives also will tend to compare less favorably to relevant indexes. 

  Indexes may also reflect the performance of some securities which a fund may 
be prohibited from buying. A bond fund, for example, may be limited to 
investments in only high quality bonds, or a stock fund may only be able to 
buy stocks that have been traded on a stock exchange for a minimum number of 
years or stocks that have a certain market capitalization. Indexes usually do 
not have the same investment restrictions as your Fund. 

Indexes do not include costs of investing 

The comparison is further limited in its utility because the indexes do not 
take into account any deductions for sales charges, transaction costs or 
other fund expenses. Your Fund's performance figures do reflect such 
deductions. Sales charges--whether up-front or deferred--pay for the cost of 
the investment advice of your financial adviser. Transaction costs pay for 
the costs of buying and selling securities for your Fund's portfolio. Fund 
expenses pay for the costs of investment management and various shareholder 
services. None of these costs are reflected in index total returns. The 
comparison is not completely realistic because an index cannot be duplicated 
by an investor--even an unmanaged index--without incurring some charges and 
expenses. 

One of several measures 

The chart is one of several tools you can use to understand your investment. 
It should be read in conjunction with the Fund's prospectus, and annual and 
semiannual reports. Also, your financial adviser, who understands your 
personal financial situation, can best explain the features of your Keystone 
fund and how it applies to your financial needs. 

Future returns may be different 

Shareholders also should be mindful that the long-run performance of either 
the Fund or the indexes is not representative of what shareholders should 
expect to receive from their Fund investment in the future; it is presented 
to illustrate only past performance and is not a guarantee of future returns. 

<PAGE> 

PAGE 9 

SCHEDULE OF INVESTMENTS--August 31, 1996 

<TABLE>
<CAPTION>
                                                         Interest   Maturity        Par           Market 
                                                            Rate      Date         Value           Value 
 ----------------------------------------------------------------------------------------------------------- 
<S>                                <C>                     <C>        <C>       <C>             <C>
FIXED INCOME (98.1%) 
INDUSTRIAL BONDS & NOTES (49.9%) 
ADVERTISING & PUBLISHING (0.3%) 
  K-III Communications             Sr. Notes                8.500%    2006      $2,000,000      $ 1,860,000 
   Corporation 
  ---------------------------------------------------------------------------------------------------------- 
AMUSEMENTS (3.7%) 
  Boyd Gaming Corporation          Sr. Notes (Subord.)     10.750     2003       4,000,000        4,150,000 
  Casino America, Incorporated     Sr. Secd. Notes         12.500     2003       3,500,000        3,517,500 
  Grand Casino, Incorporated       1st Mtge. Notes         10.125     2003       2,500,000        2,425,000 
  Harvey's Casino Resorts          Sr. Notes (Subord.)     10.625     2006       2,000,000        2,065,000 
  Six Flags Theme Parks,           Sr. Disc. Notes          0.000     2005       4,250,000        3,612,500 
   Incorporated (Eff. Yield 
   11.12%) (d) 
  Trump Atlantic City              1st Mtge. Notes         11.250     2006       5,000,000        4,775,000 
   Associates 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                 20,545,000 
  ---------------------------------------------------------------------------------------------------------- 
BROADCASTING (0.4%) 
  Sinclair Broadcast Group,        Sr. Notes (Subord.)     10.000     2005       2,500,000        2,443,750 
   Incorporated 
  ---------------------------------------------------------------------------------------------------------- 
BUILDING MATERIALS (2.4%) 
  Continental Homes Holding        Sr. Notes               10.000     2006       3,000,000        2,985,000 
   Corporation 
  HMH Properties, Incorporated     Sr. Secd. Notes          9.500     2005       5,000,000        4,875,000 
  Schuller International Group,    Sr. Notes               10.875     2004       5,000,000        5,425,000 
   Incorporated 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                 13,285,000 
  ---------------------------------------------------------------------------------------------------------- 
CABLE (0.6%) 
  Comcast Corporation (Eff.        Sr. (Subord.) Disc.      0.000     2000       3,380,000        2,366,000 
   Yield 11.72%) (d)                Deb. 
  Fundy Cable Limited              Sr. Secd. Second        11.000     2005       1,175,000        1,204,375 
                                    Priority Note 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                  3,570,375 
  ---------------------------------------------------------------------------------------------------------- 
CAPITAL GOODS (1.6%) 
  John Deere Capital               Deb.                     8.625     2019       8,850,000        9,349,317 
   Corporation 
  ---------------------------------------------------------------------------------------------------------- 
CHEMICALS (0.8%) 
  GI Holdings, Incorporated        Sr. Notes               10.000     2006       2,166,000        2,106,435 
  Rexene Corporation               Sr. Notes               11.750     2004       2,175,000        2,316,375 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                  4,422,810 
  ---------------------------------------------------------------------------------------------------------- 
CONSUMER GOODS (2.3%) 
  Coty, Incorporated               Sr. Notes (Subord.)     10.250     2005       2,500,000        2,650,000 
  Lenfest Communications,          Sr. Secd. Notes          8.375     2005       5,000,000        4,625,000 
   Incorporated 
  Revlon Worldwide Corporation     Sr. Secd. Disc.          0.000     1998       6,500,000        5,525,000 
   (Eff. Yield 12.95%) (d)         Notes 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                 12,800,000 
  ---------------------------------------------------------------------------------------------------------- 

                                                                                    (continued on next page) 

<PAGE> 

PAGE 10

Keystone Diversified Bond Fund (B-2)

SCHEDULE OF INVESTMENTS--August 31, 1996


                                                         Interest   Maturity        Par           Market 
                                                            Rate      Date         Value           Value 
 ----------------------------------------------------------------------------------------------------------- 
DIVERSIFIED COMPANIES (4.4%) 
  General Electric Capital         Notes                    7.500%    2035      $11,000,000     $10,653,830 
   Corporation 
  Grand Metropolitan Investment    Sr. Notes                7.450     2035        9,000,000       9,173,160 
   Corporation 
  Jordan Industries,               Sr. Notes               10.375     2003        5,000,000       4,800,000 
   Incorporated 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                 24,626,990 
  ---------------------------------------------------------------------------------------------------------- 
ENERGY AND ELECTRICAL PRODUCTS (0.6%) 
  Nuevo Energy Company             Sr. Notes (Subord.)      9.500     2006        3,500,000       3,517,500 
  ---------------------------------------------------------------------------------------------------------- 
FINANCE (8.3%) 
  American Life Holding Company    Sr. Notes (Subord.)     11.250     2004        4,000,000       4,510,000 
  Amsouth Bancorporation           Subord. Debs.            6.750     2025       10,000,000       9,511,300 
  APP International Finance        Secd. Sr. Notes         11.750     2005        2,000,000       2,020,000 
   Company B. V. 
  Commercial Credit Group,         Notes                   10.000     2009        5,000,000       5,899,750 
   Incorporated 
  First Nationwide Holdings        Sr. Notes               12.500     2003        2,500,000       2,581,250 
  NationsBank Corporation          Subord. Notes            6.500     2006        9,000,000       8,328,330 
  Paine Webber Group,              Medium Term Notes        6.730     2004        9,385,000       8,763,244 
   Incorporated 
  Tembec Finance Corporation       Sr. Notes                9.875     2005        5,000,000       4,712,500 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                 46,326,374 
  ---------------------------------------------------------------------------------------------------------- 
FOODS (0.6%) 
  TLC Beatrice International       Sr. Secd. Notes         11.500     2005        3,000,000       3,060,000 
  Holdings, Incorporated 
  ---------------------------------------------------------------------------------------------------------- 
HEALTHCARE (0.8%) 
  Dynacare, Incorporated           Sr. Notes               10.750     2006          600,000         601,500 
  Mariner Health Group,            Sr. Notes (Subord.)      9.500     2006        4,000,000       4,010,000 
   Incorporated 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                  4,611,500 
  ---------------------------------------------------------------------------------------------------------- 
INSURANCE (5.9%) 
  MBIA, Incorporated               Deb.                     9.375     2011       15,250,000      17,175,008 
  Nationwide CSN Trust (c)         Sr. Notes                9.875     2025       10,000,000      10,664,500 
  Reliance Group Holdings,         Sr. Deb. (Subord.)       9.750     2003        4,000,000       4,010,000 
   Incorporated 
  Travelers/Aetna Property and     Sr. Notes                7.750     2026        1,000,000         967,220 
   Casualty Corporation 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                 32,816,728 
  ---------------------------------------------------------------------------------------------------------- 
METALS AND MINING (1.1%) 
  Koppers Industries,              Sr. Notes                8.500     2004        3,500,000       3,307,500 
   Incorporated 
  Wheeling Pittsburgh              Sr. Notes                9.375     2003        3,000,000       2,820,000 
   Corporation 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                  6,127,500 
  ---------------------------------------------------------------------------------------------------------- 
MUNICIPALS (0.9%) 
  Los Angeles, California (c)      Fire Safety              8.480     2015        5,000,000       5,031,250 
                                    Improvements 
                                    Assessment Dist. 
                                    #1 
  ---------------------------------------------------------------------------------------------------------- 

<PAGE> 

PAGE 11

SCHEDULE OF INVESTMENTS--August 31, 1996

                                                         Interest   Maturity        Par           Market 
                                                            Rate      Date         Value           Value 
 ----------------------------------------------------------------------------------------------------------- 
NATURAL GAS (0.7%) 
  TransTexas Gas Corporation       Sr. Secd. Notes         11.500%    2002      $ 4,000,000    $  4,170,000 
  ---------------------------------------------------------------------------------------------------------- 
OIL AND OIL SERVICES (2.6%) 
  Gulf CDA Resources               Sr. Deb. (Subord.)       9.625     2005        2,500,000       2,581,250 
  Oslo Seismic (c)                 1st Prf. Mtg. Notes      8.280     2011       10,000,000       9,968,750 
  Stena AB                         Sr. Notes               10.500     2005        2,000,000       2,030,000 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                 14,580,000 
  ---------------------------------------------------------------------------------------------------------- 
PAPER & PACKAGING (0.4%) 
  Packaging Resources,             Sr. Notes (Subord.)     11.625     2003        2,000,000       2,030,000 
  Incorporated (c) 
  ---------------------------------------------------------------------------------------------------------- 
RETAIL (1.3%) 
  Cole National Group,             Sr. Notes               11.250     2001        4,000,000       4,210,000 
   Incorporated 
  Michaels Stores, Incorporated    Sr. Notes               10.875     2006        3,000,000       2,977,500 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                  7,187,500 
  ---------------------------------------------------------------------------------------------------------- 
TELECOMMUNICATIONS (8.8%) 
  Adelphia Communications          Sr. Notes               12.500     2002        5,000,000       5,150,000 
   Corporation 
  American Media Operations        Sr. Notes (Subord.)     11.625     2004        4,000,000       4,140,000 
   Corporation 
  Benedek Communications           Sr. (Subord.) Disc.      0.000     2006        4,750,000       2,612,500 
   (Eff. Yield 12.24%) (c) (d)      Notes 
  Cablevision Systems              Sr. Deb. (Subord.)      10.500     2016        3,000,000       2,940,000 
   Corporation 
  Comcast Corporation              Sr. Deb. (Subord.)      10.625     2012        5,000,000       5,250,000 
  Marcus Cable Operations          Sr. (Subord.) Disc.      0.000     2004        4,000,000       2,940,000 
  Limited Partnership (Eff.         Notes 
   Yield 10.91%) (d) 
  Millicom International           Sr. (Subord.) Notes     13.500     2006        3,750,000       2,015,625 
   Cellular S. A. (c) 
  Mobile Telecommunications        Sr. (Subord.) Notes     13.500     2002        3,500,000       3,640,000 
   Technology 
  Park Broadcasting,               Sr. Notes               11.750     2004        3,000,000       3,412,500 
   Incorporated (c) 
  Pricecellular Wireless           Sr. Disc. Notes          0.000     2003        4,025,000       3,179,750 
   Corporation (Eff. Yield 
   10.52%) (d) 
  SFX Broadcasting,                Sr. Notes (Subord.)     10.750     2006        3,500,000       3,570,000 
   Incorporated (c) 
  Telewest PLC (Eff. Yield         Sr. Disc. Deb.           0.000     2007        7,000,000       4,322,500 
   9.83%) (d) 
  Vanguard Cellular Systems,       Sr. Deb.                 9.375     2006        3,000,000       2,910,000 
   Incorporated 
  Videotron Group Limited          Voting Conv. Deb.       10.625     2005        3,000,000       3,225,000 
                                    (Subord.) 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                                 49,307,875 
  ---------------------------------------------------------------------------------------------------------- 
TRANSPORTATION (0.5%) 
  Gearbulk Holding Limited         Sr. Notes               11.250     2004        2,500,000       2,693,750 
  ---------------------------------------------------------------------------------------------------------- 
UTILITIES (0.9%) 
  El Paso Electric Company         1st Mtge. Notes          9.400     2011        5,000,000       5,075,000 
  ---------------------------------------------------------------------------------------------------------- 
TOTAL INDUSTRIAL BONDS & NOTES (Cost--$282,378,023)                                             279,438,219 
  ---------------------------------------------------------------------------------------------------------- 

                                                                                    (continued on next page) 

<PAGE> 

PAGE 12

Keystone Diversified Bond Fund (B-2)

SCHEDULE OF INVESTMENTS--August 31, 1996

                                                         Interest   Maturity        Par           Market 
                                                            Rate      Date         Value           Value 
 ----------------------------------------------------------------------------------------------------------- 
FOREIGN BONDS (U.S. DOLLARS) (2.2%) 
  Grupo Televisa S.A. (c)          Sr. Notes               11.875%    2006      $1,500,000      $ 1,548,750 
  Grupo Televisa S.A. (Eff.        Sr. Disc. Deb.           0.000     2008       3,000,000        1,695,000 
   Yield 11.87%) (c) (d) 
  Indah Kiat International         Sr. Secd. Notes         11.875     2002       3,000,000        3,135,000 
   Finance Company B. V. 
  Ispat Mexicana S.A.              Sr. Unsecd. Deb.        10.375     2001       4,000,000        3,920,000 
  Republic of Argentina            Sr. Notes                8.375     2003       2,500,000        2,134,375 
  ---------------------------------------------------------------------------------------------------------- 
TOTAL FOREIGN BONDS (U.S. DOLLARS) (Cost--$11,241,132)                                           12,433,125 
  ---------------------------------------------------------------------------------------------------------- 
FOREIGN BONDS (NON U.S. DOLLARS) (17.0%) 
  Commonwealth of Canada           Deb.                     7.500     2003       33,750,000      25,105,468 
                                                                           Canadian Dollars 
  Commonwealth of Canada           Deb.                     8.750     2005       43,400,000      34,578,579 
                                                                           Canadian Dollars 
  Federal Republic of Germany      Deb.                     6.500     2003       21,293,000      14,801,182 
                                                                               German Marks 
  Federal Republic of Germany      Deb.                     6.875     2005       29,600,000      20,701,595 
                                                                               German Marks 
  ---------------------------------------------------------------------------------------------------------- 
TOTAL FOREIGN BONDS (NON U.S. DOLLARS) (Cost--$94,753,152)                                       95,186,824 
  ---------------------------------------------------------------------------------------------------------- 
COLLATERALIZED MORTGAGE OBLIGATIONS (19.0%) 
  Chase Mortgage Finance           Series 1994-L            7.875     2025        3,045,111       2,897,614 
  Corporation (Est. Mat. 2005) 
   (b) (c) 
  Collateralized Mortgage          Series 6 Class D         8.800     2006        2,104,147       2,112,206 
   Investors Trust (Est. Mat. 
   1997) (b) 
  Criimi Mae Financial             Series 1 Class A         7.000     2033        3,480,559       3,280,427 
   Corporation (Est. Mat. 2003) 
   (b) 
  Debartolo Capital Partnership    Commercial Mtge.         7.610     2004        9,000,000       9,061,875 
   (Est. Mat. 2000) (b) (c)         Class B 
  FHA Pool #02043143 (Est. Mat.    Blair House Project      9.125     2034        3,379,123       3,539,632 
   1999) (b) 
  FHA Pool #02043143 (Est. Mat.    Blair House Project     10.250     2034        2,503,772       2,622,702 
   1999) (b) 
  FHLMC (Est. Mat. 2010) (b)       Series G8 Class SB       9.600     2023          191,912         142,015 
                                    inverse floater 
  FHLMC Trust (Est. Mat. 2004)     Series 47, Class A       5.000     2022        5,000,000       4,250,000 
   (b) 
  FNMA (Est. Mat. 2004) (b)        Series 1993-248          3.168     2023       12,510,527       8,280,405 
                                    Class SA 
  FNMA Trust (Est. Mat. 2007)      Series 1993 038          5.000     2022        5,000,000       4,023,250 
   (b)                              Class L 
  GS Mortgage Securities           Series 1996-PL           7.410     2027       11,000,000      10,876,250 
   Corporation (Est. Mat. 2007) 
   (b) 
  Marine Midland (Est. Mat.        Series 1991-3            8.000     2024        3,589,872       3,576,409 
   1997) (b) 
  Merrill Lynch Mortgage           Series 1996-C1           7.420     2026        5,000,000       4,876,050 
   Investors, Incorporated 
   (Est. Mat. 2007) (b) 
  Merrill Lynch Mortgage           Series 1992 D Class      8.500     2017        1,533,536       1,550,758 
   Investors, Incorporated          B 
   (Est. Mat. 2000) (b) 

<PAGE> 

PAGE 13

SCHEDULE OF INVESTMENTS--August 31, 1996

                                                         Interest   Maturity        Par           Market 
                                                            Rate      Date         Value           Value 
 ----------------------------------------------------------------------------------------------------------- 
COLLATERALIZED MORTGAGE OBLIGATIONS (Continued) 
  Morgan Stanley, Incorporated     Series 1996 Class A     6.475%      2010      $4,952,360    $  4,737,241 
   (Est. Mat. 2001) (b) (c) 
  Paine Webber Mortgage            Series 1993-4           7.500       2023       2,869,958       2,759,636 
   Acceptance Corporation IV 
   (Est. Mat. 2006) (b) 
  Residential Asset                Series 1996-A6          7.500       2026       5,000,000       4,646,875 
   Securitization Trust (Est. 
   Mat. 2007) (b) 
  Ryland Acceptance Corporation    Series 88 Class E       7.950       2019       9,847,346       9,826,273 
   (Est. Mat. 2000) (b) 
  Shearson Lehman, Incorporated    Series V Class 5        7.500       2019       3,500,000       3,461,719 
   (Est. Mat. 2004) (b) 
  Structured Asset Securities      Series 1996 Class B     6.303       2028       8,349,662       7,994,801 
   Corporation (Est. Mat. 2001) 
   (b) 
  Volvo Car Finance Grantor        Series 1993-2 Class     0.000       1997         702,712         672,407 
   Trust (Eff. Yield 6.62%)         A 
   (Est. Mat. 1996) (b) (c) (d) 
  Zale Funding Trust (Est. Mat.    Series 1994-1 Class     7.325       2003      11,000,000      11,041,250 
   1999) (b) (c)                    A2 
  ---------------------------------------------------------------------------------------------------------- 
TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost--$108,334,906)                                  106,229,795 
  ---------------------------------------------------------------------------------------------------------- 
ADJUSTABLE RATE MORTGAGE SECURITIES (1.1%) (Cost--$6,155,575) 
  FNMA Pool #124945                Cap 12.54% Margin,      7.599       2031       5,907,284       6,162,066 
                                    2.00% + CMT 
  ---------------------------------------------------------------------------------------------------------- 
UNITED STATES GOVERNMENT ISSUES (8.9%) 
  U.S. Treasury Bonds (Eff.                                0.000       2020      98,000,000      16,980,460 
   Yield 8.47%) (d) 
  U.S. Treasury Bonds                                      7.875       2021      30,500,000      32,549,295 
  ---------------------------------------------------------------------------------------------------------- 
TOTAL UNITED STATES GOVERNMENT ISSUES (Cost--$51,432,004)                                        49,529,755 
  ---------------------------------------------------------------------------------------------------------- 
TOTAL FIXED INCOME (Cost--$554,294,792)                                                         548,979,784 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                  Shares 
  ---------------------------------------------------------------------------------------------------------- 
COMMON STOCKS (0.0%) (COST--$2) 
  PM Holdings Corporation (e)                                                         1,618               2 
  ---------------------------------------------------------------------------------------------------------- 
                                                                                 Maturity 
                                                                                   Value 
  ---------------------------------------------------------------------------------------------------------- 
REPURCHASE AGREEMENT (0.5%) (COST--$2,930,000) 
  Keystone Joint Repurchase                                5.243     9/3/96      $2,931,707       2,930,000 
   Agreement (Investments in 
   repurchase agreements, in a 
   joint trading account, 
   purchased 8/30/96) (f) 
  ---------------------------------------------------------------------------------------------------------- 
TOTAL INVESTMENTS (Cost--$557,224,794) (a)                                                      551,909,786 
OTHER ASSETS AND LIABILITIES--NET (1.4%)                                                          7,882,152 
  ---------------------------------------------------------------------------------------------------------- 
NET ASSETS (100%)                                                                              $559,791,938 
  ---------------------------------------------------------------------------------------------------------- 

                                                                                    (continued on next page) 
</TABLE>

<PAGE> 

PAGE 14 

Keystone Diversified Bond Fund (B-2) 

SCHEDULE OF INVESTMENTS--August 31, 1996 

(a) The cost of investments for federal income tax purposes is $557,231,919. 
    Gross unrealized appreciation and depreciation of investments, based on 
    identified tax cost at August 31, 1996, are as follows: 

       Gross unrealized appreciation      $  7,461,734 
       Gross unrealized depreciation       (12,783,867) 

       Net unrealized depreciation        ($  5,322,133) 
                                         ============== 
(b) The estimated maturity of a Collateralized Mortgage Obligation ("CMO") is 
    based on current and projected prepayment rates. Changes in interest 
    rates can cause the estimated maturity to differ from the listed date. 

(c) Securities that may be resold to "qualified institutional buyers" under 
    Rule 144A or securities offered pursuant to Section 4(2) of the 
    Securities Act of 1933, as amended. These securities have been determined 
    to be liquid under guidelines established by the Board of Trustees. 

(d) Effective yield (calculated at date of purchase) is the yield at which 
    the bond accretes on an annual basis until maturity date. 

(e) Non-income producing security. 

(f) The repurchase agreements are fully collateralized by U.S. government 
    and/or agency obligations based on market prices at August 31, 1996. 

Legend of Portfolio Abbreviations: 

CMT--1 year Constant Maturity Treasury 

FHA--Federal Housing Administration 

FHLMC--Federal Home Loan Mortgage Corporation 

FNMA--Federal National Mortgage Association 

FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS 

<TABLE>
<CAPTION>
                                                                                         Net Unrealized 
 Exchange                                            U.S. value at        In Exchange     Appreciation/ 
   Date                                              August 31, 1996      for U.S. $     (Depreciation) 
- -------------------------------------------------------------------------------------------------------- 
<S>           <C>              <C>                      <C>               <C>               <C>
Forward Foreign Currency Exchange Contracts to Buy: 

                                Contracts to Receive 
              -------------------------------------------------------- 
10/15/96      2,838,000,000    Spanish Peseta           $22,624,878       $22,502,477       $ 122,401 

Forward Foreign Currency Exchange Contracts to Sell: 

                                Contracts to Deliver 
              -------------------------------------------------------- 
11/29/96         85,624,000    Canadian Dollars         $62,773,273       $62,829,469       $  56,196 
11/07/96         54,104,500    German Marks              36,732,667        36,726,807          (5,860) 
10/15/96      2,838,000,000    Spanish Peseta            22,624,878        22,024,983        (599,895) 
</TABLE>

See Notes to Financial Statements. 

<PAGE> 

PAGE 15 

FINANCIAL HIGHLIGHTS 
(For a share outstanding throughout each year) 

<TABLE>
<CAPTION>
                                                           Year Ended August 31, 
                                        ----------------------------------------------------------- 
<S>                                     <C>         <C>        <C>         <C>            <C>
                                            1996        1995       1994          1993         1992 
 -------------------------------------------------------------------------------------------------- 
Net asset value beginning of year         $15.09      $15.28     $17.06        $16.44       $15.37 
 -------------------------------------------------------------------------------------------------- 
Income from investment operations: 
Net investment income                       0.95        1.06       1.06          1.28         1.33 
Net realized and unrealized gain 
  (loss) on investments and foreign 
  currency related transactions            (0.35)       0.11      (1.62)         0.70         1.14 
 -------------------------------------------------------------------------------------------------- 
Total from investment operations            0.60        1.17      (0.56)         1.98         2.47 
 -------------------------------------------------------------------------------------------------- 
Less distributions from: 
Net investment income                      (0.96)      (1.06)     (1.22)        (1.28)       (1.33) 
In excess of net investment income             0       (0.22)         0         (0.08)       (0.07) 
Tax basis return of capital                (0.08)      (0.08)         0             0            0 
Net realized gain on investments               0           0          0             0            0 
 -------------------------------------------------------------------------------------------------- 
Total distributions                        (1.04)      (1.36)     (1.22)        (1.36)       (1.40) 
 -------------------------------------------------------------------------------------------------- 
Net asset value end of year               $14.65      $15.09     $15.28        $17.06       $16.44 
 -------------------------------------------------------------------------------------------------- 
Total return (a)                            4.03%       8.13%     (3.53%)       12.73%       16.88% 
Ratios/supplemental data 
Ratios to average net assets: 
 Total expenses                             1.84%(b)    1.81%      1.75%         1.89%        1.99% 
 Net investment income                      6.42%       7.05%      6.48%         7.73%        8.29% 
Portfolio turnover rate                      246%        178%       200%          133%         117% 
 -------------------------------------------------------------------------------------------------- 
Net assets end of year (thousands)      $559,792    $734,837   $814,245    $1,004,393     $902,339 
 -------------------------------------------------------------------------------------------------- 
</TABLE>

<TABLE>
<CAPTION>
                                                           Year Ended August 31, 
                                        ----------------------------------------------------------- 
<S>                                     <C>         <C>       <C>           <C>           <C>
                                            1991        1990        1989        1988          1987 
 -------------------------------------------------------------------------------------------------- 
Net asset value beginning of year         $15.51      $17.74      $17.99      $18.91        $20.08 
 -------------------------------------------------------------------------------------------------- 
Income from investment operations: 
Net investment income                       1.33        1.53        1.71        1.78          1.83 
Net realized and unrealized gain 
  (loss) on investments and foreign 
  currency related transactions             0.17       (1.94)      (0.13)      (0.81)        (1.01) 
 -------------------------------------------------------------------------------------------------- 
Total from investment operations            1.50       (0.41)       1.58        0.97          0.82 
 -------------------------------------------------------------------------------------------------- 
Less distributions from: 
Net investment income                      (1.63)      (1.61)      (1.83)      (1.85)        (1.85) 
In excess of net investment income         (0.01)      (0.21)          0           0             0 
Tax basis return of capital                    0           0           0           0             0 
Net realized gain on investments               0           0           0       (0.04)        (0.14) 
 -------------------------------------------------------------------------------------------------- 
Total distributions                        (1.64)      (1.82)      (1.83)      (1.89)        (1.99) 
 -------------------------------------------------------------------------------------------------- 
Net asset value end of year               $15.37      $15.51      $17.74      $17.99        $18.91 
 -------------------------------------------------------------------------------------------------- 
Total return (a)                           10.58%      (2.44%)       9.23%      5.61%         4.20% 
Ratios/supplemental data 
Ratios to average net assets: 
 Total expenses                             1.94%       1.89%       1.84%       1.68%         1.68% 
 Net investment income                      8.74%       9.26%       9.52%       9.82%         9.31% 
Portfolio turnover rate                      101%         43%         47%         46%           74% 
 -------------------------------------------------------------------------------------------------- 
Net assets end of year (thousands)      $814,528    $860,615  $1,000,305    $838,892      $889,333 
 -------------------------------------------------------------------------------------------------- 
</TABLE>

(a) Excluding applicable sales charges. 

(b) Ratio of expenses to average net assets includes indirectly paid expenses 
    for the year ended August 31, 1996. Excluding indirectly paid expenses, 
    the expense ratio would have been 1.83%. 

See Notes to Financial Statements. 

<PAGE> 

PAGE 16 

Keystone Diversified Bond Fund (B-2) 

STATEMENT OF ASSETS AND LIABILITIES 
August 31, 1996 

Assets (Note 2) 
 Investments at market value 
  (identified cost--$557,224,794)                        $ 551,909,786 
 Cash                                                              161 
 Receivable for: 
  Investments sold                                              49,575 
  Fund shares sold                                             233,257 
  Interest                                                   9,995,518 
 Net unrealized appreciation on forward foreign 
 currency exchange contracts                                   178,597 
 Prepaid expenses and other assets                             113,377 
 ---------------------------------------------------------------------- 
   Total assets                                            562,480,271 
 ---------------------------------------------------------------------- 
Liabilities (Notes 2 and 5) 
 Payable for: 
  Fund shares redeemed                                         593,382 
  Distributions to shareholders                              1,396,617 
 Net unrealized depreciation on forward foreign 
 currency exchange contracts                                   605,755 
 Due to related parties                                          2,043 
 Other accrued expenses                                         90,536 
 ---------------------------------------------------------------------- 
   Total liabilities                                         2,688,333 
 ---------------------------------------------------------------------- 
Net assets                                               $ 559,791,938 
 ====================================================================== 
Net assets represented by 
 Paid-in capital                                         $ 736,888,926 
 Accumulated distributions in excess of net 
 investment income                                          (1,446,954) 
 Accumulated net realized loss on investments and 
 foreign currency related transactions                    (169,908,557) 
 Net unrealized depreciation on investments and 
 foreign currency related transactions                      (5,741,477) 
 ---------------------------------------------------------------------- 
   Total net assets                                      $ 559,791,938 
 ====================================================================== 
Net Asset Value Per Share (Note 2) 
 Net asset value of $559,791,938 / 38,221,105 
 outstanding shares of beneficial interest                       14.65 
 ====================================================================== 

STATEMENT OF OPERATIONS 
Year Ended August 31, 1996 

Investment income 
 Interest                                                    $ 54,151,923 
- -------------------------------------------------------------------------- 
Expenses (Notes 4 and 5) 
 Management fee                             $  3,481,728 
 Transfer agent fees                           1,454,352 
 Accounting, auditing and legal                   67,591 
 Custodian fees                                  319,543 
 Trustees' fees and expenses                      35,248 
 Distribution Plan expenses                    6,610,025 
 Other                                           131,639 
- -------------------------------------------------------------------------- 
   Total expenses                                              12,100,126 
 Less: Expenses paid indirectly (Note 6)                          (90,034) 
- -------------------------------------------------------------------------- 
Net expenses                                                   12,010,092 
- -------------------------------------------------------------------------- 
Net investment income                                          42,141,831 
- -------------------------------------------------------------------------- 
Net realized and unrealized loss on investments and 
 foreign currency related transactions (Notes 1 and 3) 
Net realized gain (loss) on: 
 Investments                                     440,321 
 Foreign currency related transactions          (117,014) 
- -------------------------------------------------------------------------- 
Net realized gain (loss) on investments 
 and foreign currency related transactions                        323,307 
- -------------------------------------------------------------------------- 
Net change in unrealized depreciation on: 
 Investments                                 (14,227,912) 
 Foreign currency related transactions          (426,469) 
- -------------------------------------------------------------------------- 
Net change in unrealized depreciation 
 on investments and foreign currency 
 related transactions                                         (14,654,381) 
- -------------------------------------------------------------------------- 
Net realized and unrealized loss on 
 investments and foreign currency 
 related transactions                                         (14,331,074) 
- -------------------------------------------------------------------------- 
Net increase in net assets resulting 
 from operations                                             $ 27,810,757 
========================================================================== 

See Notes to Financial Statements. 

<PAGE> 

PAGE 17 

STATEMENTS OF CHANGES IN NET ASSETS 

<TABLE>
<CAPTION>
                                                                        Year Ended August 31, 
                                                                   -------------------------------- 
                                                                       1996              1995 
 -------------------------------------------------------------------------------------------------- 
<S>                                                               <C>               <C>
Operations: 
Net investment income                                             $  42,141,831     $  53,360,595 
Net realized gain (loss) on investments, closed futures 
 contracts and foreign currency related transactions                    323,307       (25,270,677) 
Net change in unrealized appreciation (depreciation) on 
 investments and foreign currency related transactions              (14,654,381)       29,299,264 
 -------------------------------------------------------------------------------------------------- 
Net increase in net assets resulting from operations                 27,810,757        57,389,182 
 -------------------------------------------------------------------------------------------------- 
Distributions to shareholders from (Note 1) 
Net investment income                                               (42,020,420)      (53,360,595) 
In excess of net investment income                                            0       (11,593,245) 
Tax basis return of capital                                          (2,935,918)       (3,726,265) 
 -------------------------------------------------------------------------------------------------- 
 Total distributions to shareholders                                (44,956,338)      (68,680,105) 
 -------------------------------------------------------------------------------------------------- 
Capital share transactions (Note 2) 
Proceeds from shares sold                                            89,671,653       115,263,649 
Payments for shares redeemed                                       (273,136,100)     (222,230,419) 
Net asset value of shares issued in reinvestment of dividends 
 and distributions                                                   25,564,686        38,850,254 
 -------------------------------------------------------------------------------------------------- 
Net decrease in net assets resulting from capital share 
 transactions                                                      (157,899,761)      (68,116,516) 
 -------------------------------------------------------------------------------------------------- 
 Total decrease in net assets                                      (175,045,342)      (79,407,439) 
 -------------------------------------------------------------------------------------------------- 
Net assets: 
Beginning of year                                                   734,837,280       814,244,719 
 -------------------------------------------------------------------------------------------------- 
End of year [Including accumulated distributions in excess 
 of net investment income as follows: 1996--($1,446,954) and 
 1995--($2,237,949)] (Note 1)                                     $ 559,791,938     $ 734,837,280 
 ================================================================================================== 
</TABLE>

See Notes to Financial Statements. 

<PAGE> 

PAGE 18 

Keystone Diversified Bond Fund (B-2) 

NOTES TO FINANCIAL STATEMENTS 

(1.) Significant Accounting Policies 

Keystone Diversified Bond Fund (B-2) (the "Fund") is a common law trust for 
which Keystone Management, Inc. ("KMI") is the Investment Manager and 
Keystone Investment Management Company ("Keystone") is the Investment 
Adviser. Keystone is a wholly-owned subsidiary of Keystone Investments, Inc. 
("KII") and KMI is in turn, a wholly-owned subsidiary of Keystone. The Fund 
is registered under the Investment Company Act of 1940, as amended (the "1940 
Act"), as a diversified, open-end investment company. The Fund's investment 
objective is to provide maximum income without undue risk of principal. 

  The following is a summary of significant accounting policies consistently 
followed by the Fund in the preparation of its financial statements. The 
policies are in conformity with generally accepted accounting principles, 
which require management to make estimates and assumptions that affect 
amounts reported herein. Although actual results could differ from these 
estimates, any such differences are expected to be immaterial to the net 
assets of the Fund. 

A. Valuation of Securities 

Investments are usually valued at the closing sales price, or, in the absence 
of sales and for over-the-counter securities, the mean of the bid and asked 
prices. U.S. Government obligations held by the Fund are valued at the mean 
between the over-the-counter bid and asked prices, as furnished by an 
independent pricing service. Listed corporate bonds, other fixed income 
securities, mortgage and other asset-backed securities, and other related 
securities are valued at prices provided by an independent pricing service. 
In determining value for normal institutional-size transactions, the pricing 
service uses methods based on market transactions for comparable securities 
and various relationships between securities that are generally recognized by 
institutional traders. Security valuations not available from an independent 
pricing service (including restricted securities) are valued at fair value as 
determined in good faith according to procedures established by the Board of 
Trustees. 

Short-term investments with remaining maturities of 60 days or less are 
carried at amortized cost, which approximates market value. Short-term 
securities with greater than 60 days to maturity are valued at market value. 

B. Repurchase Agreements 

Pursuant to an exemptive order issued by the Securities and Exchange 
Commission, the Fund, along with certain other Keystone funds, may transfer 
uninvested cash balances into a joint trading account. These balances are 
invested in one or more repurchase agreements that are fully collateralized 
by U.S. Treasury and/or Federal Agency obligations. 

Securities pledged as collateral for repurchase agreements are held by the 
custodian on the Fund's behalf. The Fund monitors the adequacy of the 
collateral daily and will require the seller to provide additional collateral 
in the event the market value of the securities pledged falls below the 
carrying value of the repurchase agreement. 

C. Reverse Repurchase Agreements 

The Fund may enter into reverse repurchase agreements with qualified 
third-party broker-dealers. Interest on the value of reverse repurchase 
agreements is based upon competitive market rates at the time of issuance. At 
the time the Fund enters into a reverse repurchase agreement, it will 
establish and maintain a segregated account with the custodian containing 
liquid assets having a value not less than the repurchase price (including 
accrued interest). If the counterparty to the transaction is rendered 
insolvent, the ultimate realization of the securities to be repurchased by 
the Fund may be delayed or limited. 

<PAGE> 

PAGE 19 

D. Foreign Currency 

The books and records of the Fund are maintained in United States (U.S.) 
dollars. Foreign currency amounts are translated into United States dollars 
as follows: market value of investments, assets and liabilities at the daily 
rate of exchange; purchases and sales of investments, income and expenses at 
the rate of exchange prevailing on the respective dates of such transactions. 
Net unrealized foreign exchange gain (loss) resulting from changes in foreign 
currency exchange rates is a component of net unrealized appreciation 
(depreciation) on investments and foreign currency transactions. Net realized 
foreign currency gains and losses resulting from changes in exchange rates 
include foreign currency gains and losses between trade date and settlement 
date on investment securities transactions, foreign currency transactions and 
the difference between the amounts of interest and dividends recorded on the 
books of the Fund and the amount actually received. The portion of foreign 
currency gains and losses related to fluctuations in exchange rates between 
the initial purchase trade date and subsequent sale trade date is included in 
realized gain (loss) on foreign currency transactions 

E. Futures Contracts 

In order to gain exposure to or protect against changes in security values, 
the Fund may buy and sell futures contracts. 

The initial margin deposited with a broker when entering into a futures 
transaction is subsequently adjusted by daily payments or receipts as the 
value of the contract changes. Such changes are recorded as unrealized gains 
or losses. Realized gains or losses are recognized on closing the contract. 

Risks of entering into futures contracts include (i) the possibility of an 
illiquid market for the contract, (ii) the possibility that a change in the 
value of the contract may not correlate with changes in the value of the 
underlying instrument or index, (iii) the possibility that Keystone will not 
accurately predict changes in exchange rates, interest rates or market 
prices, and (iv) the credit risk that the other party will not fulfill the 
obligations of the contract. Futures contracts also involve elements of 
market risk in excess of the amount reflected in the statement of assets and 
liabilities 

F. Forward Foreign Currency Exchange Contracts 

The Fund may enter into forward foreign currency exchange contracts ("forward 
contracts") to settle portfolio purchases and sales of securities denominated 
in a foreign currency and to hedge certain foreign currency assets. Forward 
contracts are recorded at the forward rate and are marked-to-market daily. 
Realized gains and losses arising from such transactions are included in net 
realized gain (loss) on foreign currency related transactions. The Fund bears 
the risk of an unfavorable change in the foreign currency exchange rate 
underlying the forward contract and is subject to the credit risk that the 
other party will not fulfill the obligations of the contract. Forward 
contracts involve elements of market risk in excess of the amount reflected 
in the statement of assets and liabilities. 

G. Security Transactions and Investment Income 

Securities transactions are accounted for no later than one business day 
after the trade date. Realized gains and losses are computed on the 
identified cost basis. Interest income is recorded on the accrual basis and 
includes amortization of discounts and premiums. Dividend income is recorded 
on the ex-dividend date. 

H. Federal Income Taxes 

The Fund has qualified and intends to qualify in the future as a regulated 
investment company under the Internal Revenue Code of 1986, as amended (the 

<PAGE> 

PAGE 20 

Keystone Diversified Bond Fund (B-2) 

"Code"). Thus, the Fund is relieved of any federal income tax liability by 
distributing all of its net taxable investment income and net taxable capital 
gains, if any, to its shareholders. The Fund intends to avoid excise tax 
liability by making the required distributions under the Code. Accordingly, 
no provision for federal income tax is required. 

I. Distributions 

The Fund distributes net investment income monthly and net capital gains, if 
any, annually. Distributions to shareholders are recorded at the close of 
business on the ex-dividend date. 

Income and capital gains distributions to shareholders are determined in 
accordance with income tax regulations, which may differ from generally 
accepted accounting principles. These differences are primarily due to 
paydown gains (losses) and foreign securities transactions. 

(2.) Capital Share Transactions 

The Fund's Restatement of Trust Agreement authorizes the issuance of an 
unlimited number of shares of beneficial interest with a par value of $1.00. 
Transactions in shares of the Fund were as follows: 

                         Year Ended August 31, 
                        1996             1995 
- -------------------------------------------------- 
Shares sold            5,954,123        7,685,412 
Shares redeemed      (18,152,163)     (14,886,517) 
Shares issued in 
 reinvestment of 
 dividends and 
 distributions         1,709,087        2,612,246 
- -------------------------------------------------- 
Net decrease         (10,488,953)      (4,588,859) 
- -------------------------------------------------- 

(3.) Securities Transactions 

Cost of purchases and proceeds from sales of investment securities (excluding 
short-term securities) were as follows for the year ended August 31, 1996: 

                          Cost of         Proceeds 
                         Purchases       From Sales 
 ----------------------------------------------------- 
Non-U.S. Government     $735,937,996    $849,095,470 
U.S. Government          832,763,261     869,058,011 
 ----------------------------------------------------- 

As of August 31, 1996, the Fund had a capital loss carryover for federal 
income tax purposes of approximately $169,901,000, which expire as follows: 
$38,243,000--1998; $85,002,000--1999; $26,644,000--2003; and 
$20,012,000--2004. 

The average daily balance of reverse repurchase agreements outstanding during 
the year ended August 31, 1996 was $6,558,128 at a weighted average interest 
rate of 3.99%. The maximum amount of reverse repurchase agreements at one 
time during the year was $58,660,402 (including accrued interest). 

(4.) Distribution Plan 

The Fund bears some of the costs of selling its shares under a Distribution 
Plan (the "Plan") adopted pursuant to Rule 12b-1 under the 1940 Act. Under 
the Plan, the Fund pays its principal underwriter, Keystone Investment 
Distributors Company ("KIDC"), a wholly-owned subsidiary of Keystone, amounts 
that are calculated and paid daily. 

  Under the Plan, the Fund pays a distribution fee which may not exceed 1.00% 
of the Fund's average daily net assets. Of that amount, 0.75% is used to pay 
distribution expenses and 0.25% may be used to pay service fees. 

  Contingent deferred sales charges paid by redeeming shareholders may be paid 
to KIDC. 

<PAGE> 

PAGE 21 

  The Plan may be terminated at any time by vote of the Independent Trustees 
or by vote of a majority of the outstanding voting shares of the Fund. 
However, after the termination of the Plan, at the discretion of the Board of 
Trustees, payments to KIDC may continue as compensation for its services 
which had been earned while the Plan was in effect. 

  KIDC intends, but is not obligated, to continue to pay distribution costs 
that exceed the current annual payments from the Fund. KIDC intends to seek 
full payment of such distribution costs from the Fund at such time in the 
future as, and to the extent that, payment thereof by the Fund would be 
within permitted limits. 

  Total unpaid distribution costs at August 31, 1996 amounted to $18,143,554. 

(5.) Investment Management Agreement and Other Affiliated Transactions 

Under the terms of the Investment Management Agreement between KMI and the 
Fund, KMI provides investment management and administrative services to the 
Fund. In return, KMI is paid a management fee, computed and paid daily, at an 
annual rate of 2.00% of the Fund's gross investment income plus an amount 
determined by applying percentage rates, starting at 0.50% and declining as 
net assets increase to 0.25% per annum, to the net asset value of the Fund. 

  KMI has entered into an Investment Advisory Agreement with Keystone under 
which Keystone provides investment advisory and management services to the 
Fund. In return for its services, Keystone receives an annual fee 
representing 85% of the management fee received by KMI. 

  During the year ended August 31, 1996, the Fund paid or accrued $22,638 to 
Keystone for certain accounting services. The Fund paid or accrued $1,454,352 
to Keystone Investor Resource Center, Inc., a wholly-owned subsidiary of 
Keystone, for services rendered as the Fund's transfer and dividend 
disbursing agent. 

  Certain officers and/or Directors of Keystone are also officers and/or 
Trustees of the Fund. Officers of Keystone and affiliated Trustees receive no 
compensation directly from the Fund. 

(6.) Expense Offset Arrangement 

The Fund has entered into an expense offset arrangement with its custodian. 
For the year ended August 31, 1996, the Fund incurred total custody fees of 
$319,543 and received a credit of $90,034 pursuant to this expense offset 
arrangement, resulting in a net custody expense of $229,509. The assets 
deposited with the custodian under this expense offset arrangement could have 
been invested in income-producing assets. 

(7.) Subsequent Distribution to Shareholders 

A distribution from net investment income of $0.085 per share was declared 
payable on October 4, 1996 to shareholders of record on September 25, 1996. 
This distribution is not reflected in the accompanying financial statements. 

(8.) Subsequent Event 

On September 6, 1996, Keystone Investments, Inc. entered into an Agreement 
and Plan of Acquisition and Merger (the "Acquisition") with First Union 
Corporation and First Union National Bank of North Carolina ("First Union") 
whereby First Union would acquire all the assets and liabilities of Keystone 
Investments, Inc. in exchange for shares of First Union. Subject to the 
receipt of the required regulatory and shareholder approvals, the Acquisition 
is expected to take place in late December 1996. 

<PAGE> 

PAGE 22 

Keystone Diversified Bond Fund (B-2) 

INDEPENDENT AUDITORS' REPORT 

The Trustees and Shareholders 
Keystone Diversified Bond Fund (B-2) 

We have audited the accompanying statement of assets and liabilities of 
Keystone Diversified Bond Fund (B-2), including the schedule of investments, 
as of August 31, 1996, and the related statement of operations for the year 
then ended, the statements of changes in net assets for each of the years in 
the two-year period then ended, and the financial highlights for each of the 
years in the ten-year period then ended. These financial statements and 
financial highlights are the responsibility of the Fund's management. Our 
responsibility is to express an opinion on these financial statements and 
financial highlights based on our audits. 

We conducted our audits in accordance with generally accepted auditing 
standards. Those standards require that we plan and perform the audit to 
obtain reasonable assurance about whether the financial statements and 
financial highlights are free of material misstatement. An audit includes 
examining, on a test basis, evidence supporting the amounts and disclosures 
in the financial statements. Our procedures included confirmation of 
securities owned as of August 31, 1996 by correspondence with the custodian 
and brokers. An audit also includes assessing the accounting principles used 
and significant estimates made by management, as well as evaluating the 
overall financial statement presentation. We believe that our audits provide 
a reasonable basis for our opinion. 

In our opinion, the financial statements and financial highlights referred to 
above present fairly, in all material respects, the financial position of 
Keystone Diversified Bond Fund (B-2) as of August 31, 1996, the results of 
its operations for the year then ended, the changes in its net assets for 
each of the years in the two-year period then ended, and the financial 
highlights for each of the years in the ten-year period then ended in 
conformity with generally accepted accounting principles. 

                                                         KPMG Peat Marwick LLP 

Boston, Massachusetts 
September 27, 1996 

<PAGE> 

PAGE 23 

FEDERAL TAX STATUS--FISCAL 1996 DISTRIBUTIONS (Unaudited) 

  During the fiscal year ended August 31, 1996, distributions of $1.04 per 
share were paid in shares or cash. This total includes a nontaxable return of 
capital equal to $0.08 per share. The remaining dividends are taxable to 
shareholders as ordinary income in the year in which received by them or 
credited to their accounts and are not eligible for the corporate dividend 
received deduction. 

  In January 1997, we will send you complete information on the distributions 
paid during the calendar year 1996 to help you in completing your federal tax 
return. 

<PAGE> 

[back cover]

                                    KEYSTONE
                                FAMILY OF FUNDS

                                   [diamond]

                              Balanced Fund (K-1)

                          Diversified Bond Fund (B-2)

                          Growth and Income Fund (S-1)

                          High Income Bond Fund (B-4)

                            International Fund Inc.

                                  Liquid Trust

                           Mid-Cap Growth Fund (S-3)

                         Precious Metals Holdings, Inc.

                            Quality Bond Fund (B-1)

                        Small Company Growth Fund (S-4)

                          Strategic Growth Fund (K-2)

                                 Tax Free Fund

This report was prepared primarily for the information of the Fund's
shareholders. It is authorized for distribution if preceded or accompanied by
the Fund's current prospectus. The prospectus contains important information
about the Fund including fees and expenses. Read it carefully before you
invest or send money. For a free prospectus on other Keystone funds, contact
your financial adviser or call Keystone.

[Keystone logo] KEYSTONE
                I N V E S T M E N T S

                P.O. Box 2121
                Boston, Massachusetts 02106-2121

B2-R-10/96
17.6M                                                          [Recycle logo]



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