KEYSTONE DIVERSIFIED BOND FUND B-2
N-30D, 1996-04-11
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PAGE 1
- ------------------------------------
Keystone Diversified Bond Fund (B-2)

Seeks generous income and capital preservation from a broad spectrum of 
bonds. 

Dear Shareholder: 

We are writing to report to you on the activities of Keystone Diversified 
Bond Fund (B-2) for the six-month period which ended February 29, 1996. 

Performance 

Your Fund returned 3.30% for the six-month period and 9.77% for the 
twelve-month period. The Lehman Aggregate Bond Index, a broad-based index of 
corporate, government and mortgage-backed securities, returned 4.12% for the 
six-month period and 12.24% for the twelve-month period. These returns 
included both income and changes in prices. We believe this positive 
performance was the result of your Fund's flexible investment style as well 
as the bond market's favorable performance during the six-month period. 

  Bond investors faced two different environments over the six month period. 
In September 1995, the bond market was building momentum that was driven by a 
positive outlook for slow U.S. economic growth and low inflation, and by 
interest rate cuts in Japan. Cash was plentiful in the global markets and 
poured in to the U.S. bond market. With such strong demand, yields fell close 
to historically low levels. 

  The market's focus changed towards the end of 1995, however. Interest rates 
began to climb, causing bond prices to decline. In the U.S., budget gridlock, 
uncertainty about the upcoming election year and the unwinding of large 
leveraged transactions by some bond market participants all contributed to a 
new environment. 

  In February 1996, bond prices declined as a result of comments from Federal 
Reserve Board Chairman Alan Greenspan who expected a moderate growth and 
stable inflation environment. Mr. Greenspan's testimony and subsequent 
economic reports tend to support the view that the economy is not as weak as 
was previously thought; that short-term interest rates may not need to be 
reduced; and that long-term rates may have bottomed for this cycle. 

  We think that interest rates may continue to drift a bit higher over the 
near term, as investors wait for a clearer picture of the economy. Longer 
term, however, we expect to see a continuation of a low inflation and 
moderate economic growth environment. We believe this should result in an 
improving climate for bonds over the coming months. 

  The flexible investment approach that we employed with Keystone Diversified 
Bond Fund (B-2), played a key role in your Fund's performance during the 
six-month period. Your Fund was largely invested in domestic fixed income 
securities, which included primarily corporate bonds, mortgage-backed 
securities, and U.S. government and agency issues. The high yield bond 
component of the Fund stood at 32% of portfolio assets at the end of the 
period. 

  During the six-month period, we continued to upgrade the credit quality of 
the high yield portion of your Fund. On February 29, 1996, investments in the 
top two credit categories of the high yield sector accounted for 71% of our 
high yield holdings, versus 47% on August 31, 1995. The Fund's average 
maturity stood at thirteen years at the end of the period. 

  Further, we reduced holdings in U.S. government and corporate bonds and 
added selected foreign government bonds of Canada, Germany and Spain. These 
countries have stable governments, good economic fundamentals and liquid 
securities markets. We believed these bonds would offer attractive total 
returns and consistent performance. 

                                --continued-- 

<PAGE>
PAGE 2
- ------------------------------------
Keystone Diversified Bond Fund (B-2) 

Our outlook 

We believe the environment continues to be attractive for income-oriented 
investors. "Real" interest rates, or the rate received by investors after 
inflation is subtracted, have been historically high. From that standpoint, 
we think bonds have provided good values. We also expect that the state of 
the economy will again become investors' primary focus, while the bond market 
may be influenced by some temporary factors including election year rhetoric. 
We look for slow to moderate growth, with continued low inflation. 

  We believe your Fund's diversification and flexibility should provide the 
opportunity for relatively attractive income and returns. Combined with our 
careful credit analysis, we think that your Fund's ability to be flexible 
should be valuable as market conditions change. 

  Thank you for your continued support of Keystone Diversified Bond Fund 
(B-2). If you have any questions or comments about your Keystone 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 

April 1996 

{Photo of Albert H. Elfner, III] 
Albert H. Elfner, III

[Photo of George S. Bissell]
George S. Bissell 

Keystone Introduces Investment Insight Line for Shareholders 

Now you can keep up-to-date on your fund's current strategy and outlook by 
calling Keystone Investment Insight Line. You can hear senior portfolio 
manager Chris Conkey discuss his latest strategy for Keystone's high grade 
bond funds. You can also listen to Keystone's overall market outlook from 
James McCall, chief investment officer. The service is available 24 hours a 
day, seven days a week and updated at least monthly. 
Keystone Investment Insight Line 1-800-346-3858, Press 2 
Keystone Fixed-Income Update Press 3 

<PAGE>
PAGE 3
- ------------------------------------

A Discussion With 
Your Fund Manager 

[Photo of Christopher P. Conkey]

       Christopher P. Conkey is senior portfolio manager of your Fund and
          leads Keystone's high grade bond team. A Chartered Financial
      Analyst, Mr. Conkey has 12 years of experience managing fixed-income
       investments. He holds a BA in economics from Clark University and
                   an MBA in finance from Boston University.

         Your Fund's investment team is comprised of senior high grade
           portfolio manager Barbara McCue, high yield portfolio man-
            ager Kristine Cloyes and international portfolio manager
           Gilman Gunn, who evaluate credit quality and the economic
                 environment in selecting bonds for your Fund.

Q What factors shaped the bond market over the last six months?

A  The market environment can be broken down into two time frames during this 
period. Between September and November 1995, momentum towards lower rates was 
building. This was prompted by an outlook for slow economic growth and low 
inflation here in the U.S., as well as interest rate cuts overseas. Investors 
were able to borrow at very low rates in Japan and reinvest globally at 
higher rates. "Cheap money" flooded the global markets and poured heavily 
into the U.S. bond market, driving bond prices higher. Also, the U.S. dollar 
was appreciating, investors benefitted in two ways. 

  Hedge fund investors were active in this environment. Hedge funds are 
unregulated investment entities that can make investments with borrowed 
money. They are "momentum players," and can have a significant effect on 
short-term movements in the bond market. 

Q  What happened to cause the bond market to change course? 

A  At the end of 1995, investors began to focus on the budget gridlock in 
Washington, speculation about the upcoming election year and the possibility 
of a stronger economy. Many investors still believed that the positive 
fundamentals for bonds--a slow growth economy and declining interest 
rates--remained intact. But, positive sentiment took a back seat to the 
budget, politics and the economy. Momentum faded and with it, hedge funds 
began to "unwind" trades. Hedge fund selling put downward pressure on U.S. 
bond prices and contributed to what was beginning to be an uncertain 
environment for bond investors. 

  Shortly thereafter, Federal Reserve Board Chairman Alan Greenspan commented 
that the economy appeared to be growing at a moderate rate with stable 
inflation. Many investors had anticipated a recession, and viewed his 
statement negatively, resulting in bond price declines. We believe that much 
of this price volatility can be attributed to short-term factors. While 
interest rates may drift a bit higher initially, we are looking for interest 
rates to trade in a narrow range over the longer term. 

Fund Profile 

Objective: Seeks generous income and capital preservation from a broad 
spectrum of bonds. 
Commencement of investment operations: September 11, 1935 
Average maturity: 13 years 
Average quality: A 
Net assets: $659 million 
Newspaper listing: "DivrB2" 

<PAGE>
PAGE 4
- ------------------------------------
Keystone Diversified Bond Fund (B-2) 

[Pie Chart of Asset Allocations]

Asset Allocation
as of February 29, 1996

Corporate bonds (Industrial bonds & notes) (52.5%)
U.S. government obligations (13.0%)
Mortgage-backed securities (11.9%)
Mortgage pass-through securities (3.1%)
Foreign bonds (U.S. $) (3.7%)
Foreign bonds (non-U.S. $) (10.7%)
Other(1) (5.1%)

(as a percent of net assets)

{end Pie Chart]

Q  What strategies did you employ during this period? 

A  At the end of the period, your Fund was largely invested in domestic fixed 
income securities, which included corporate bonds, mortgage-backed 
securities, and U.S. government and agency obligations. The high yield 
component of the Fund stood at 32% of net assets. We also established a 
position in non-dollar foreign government bonds, which comprised 10.7% of net 
assets at the end of the period. To limit the effects of currency 
fluctuations, we hedged a portion of this investment into U.S. dollars. 

  We significantly upgraded the credit quality of the Fund's high yield 
component. The health of the corporate borrower is particularly critical 
during a slow growth economy and so we think it made sense to be conservative 
in taking on credit risk. Currently, 71% of the high yield portion of the 
Fund is ranked within that sector's top two credit categories, which reflect 
a BB rating by either one or more of the rating agencies, Moody's and 
Standard & Poor's. That was an increase from 47% on August 31, 1996. We also 
have reduced our holdings of smaller market capitalization securities, which 
should further improve trading liquidity. 

(1) Includes other assets and liabilities, common stocks and warrants, and a 
    repurchase agreement. 

  A second strategy was to take advantage of an opportunity presented in the 
global markets. We built a position in government bonds of Canada, Germany 
and Spain. These countries have stable governments, good economic 
fundamentals and liquid securities markets. Further, these markets offered 
high "real" or inflation-adjusted, interest rates. These transactions were 
partially protected from currency changes through hedging into U.S. dollars. 

  At the end of the period, the Fund's average maturity stood at approximately 
thirteen years, which was a little bit longer than our competitive group. We 
believed this was appropriate for our interest rate outlook for the six-month 
period. 

Q  Are bonds a good investment at the present time? 

A  We consider bonds to be attractive based on "real", or inflation-adjusted 
interest rates. For example, if a bond yields 6-1/2% and inflation is running 
at 3%, the "real" yield earned by an investor is 3-1/2%. This is high by 
historical standards. 

Q  What do you think will happen over the next six months? 

A  We continue to expect moderate economic growth and low inflation, with 
interest rates trading within a narrow range. Uncertainty about the direction 
of the economy, as well as other short-term factors, may cause some 
volatility in bond prices over the near term. 

   As we've said, the lack of significant inflation continues to be a 
positive influence on bonds. In addition, corporations have been successful 
in managing inventories and controlling costs. The quality of earnings is 
high and there is little wage pressure--a primary contributor to higher 
inflation. Longer term, though, we expect to see a positive environment for 
bonds, with interest rates trading close to current levels. 

<PAGE>
PAGE 5
- ------------------------------------
[Pie chart of Portfolio Quarterly Summary]

Portfolio Quarterly Summary
as of February 29, 1996

S&P rating (2)
AAA (13.5%)
AA (19.0%)
A (8.0%)
BBB (7.4%)
BB (10.1%)
B (21.6%)
Not Rated (0.7%)
Other(3) (4.6%)
U.S. government and agency (15.1%)

Average portfolio quality: A

(percentage of portfolio net assets)

[end Pie Chart]

Q  What other factors do you see affecting bonds? 

A  In the near term, we expect hedge fund activity to put some more downward 
pressure on bond prices. We've seen this happen before, and usually it is a 
short run phenomenon. In addition, election year rhetoric will probably add 
some uncertainty, as will the budget discussions in Washington. As far as 
we're concerned, the bottom line on the budget is that government spending is 
declining. We believe this should be less of a drain on private savings and 
should be favorable for bond prices over the long term. 

Q  Will Keystone Diversified Bond Fund's (B-2) flexible investment approach 
be a benefit in this environment? 

A  We think so. The Fund's flexibility enables us to take advantage of 
opportunities in a variety of market sectors. We believe that prudent 
allocation in various markets should help to protect and maximize your Fund's 
income and total returns over the long term. 

                                   [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. 

(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 short-term obligations. 

<PAGE>
PAGE 6
- ------------------------------------
Keystone Diversified Bond Fund (B-2)

Your Fund's Performance 

[Mountain chart]

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

            Initial    Reinvested
          Investment  Distributions
2/86        10000         10000
            10025         11131
2/88         9270         11385
             8857         12022
2/90         8043         12129
             7481         12676
2/92         7943         14823
             8207         16666
2/94         8291         18215
             7437         17578
2/96         7481         19296

A $10,000 investment in Keystone Diversified Bond Fund (B-2)
made on February 28, 1986 with all distributions reinvested was worth
$19,296 on February 29, 1996. Past performance is no guarantee of
future results.

[end of Mountain chart]

  The one-year return reflects the deduction of the 3% contingent deferred 
sales charge 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. 

Six-Month Performance as of February 29, 1996 
==============================================
Total return*                                  3.30% 
Net asset value 8/31/95                      $15.09 
2/29/96                                      $15.06 
Dividends                                    $ 0.53 
Capital gains                                 None 

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

Historical Record as of February 29, 1996 
==========================================
                              If you       If you did 
Cumulative total return       redeemed     not redeem 
1-year                          6.77%          9.77% 
5-year                         52.23%         52.23% 
10-year                        92.96%         92.96% 
Average annual total return 
1-year                          6.77%          9.77% 
5-year                          8.77%          8.77% 
10-year                         6.79%          6.79% 

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

SCHEDULE OF INVESTMENTS--February 29, 1996 
(Unaudited) 
<TABLE>
<CAPTION>
                                                               Interest    Maturity       Par          Market
                                                                 Rate       Date         Value          Value
- -----------------------------------------------------------------------------------------------------------------
<S>                                    <C>                        <C>        <C>      <C>            <C>
FIXED INCOME (94.9%) 
INDUSTRIAL BONDS & NOTES (52.5%) 
ADVERTISING & PUBLISHING (1.8%) 
EZ Communications                       Sr. Notes (Subord.)       9.750%     2005     $ 4,000,000    $ 4,020,000 
Hollinger International                 Sr. Notes (Subord.)       9.250      2006       5,000,000      5,037,500 
K III Communications Corp. (b)          Sr. Notes                 8.500      2006       3,000,000      2,970,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      12,027,500 
- -----------------------------------------------------------------------------------------------------------------
AMUSEMENTS (1.6%) 
Boyd Gaming Corp.                       Sr. Notes (Subord.)       10.750     2003       4,000,000      4,230,000 
Grand Casino, Inc.                      Gtd. 1st Mtge. Notes      10.125     2003       2,500,000      2,693,750 
Six Flags Theme Parks, Inc. 
  (Effective Yield 11.123%) (c)         Sr. Disc. Notes           0.000      2005       4,250,000      3,570,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      10,493,750 
- -----------------------------------------------------------------------------------------------------------------
BROADCASTING (0.8%) 
Sinclair Broadcast Group, Inc.          Sr. Notes (Subord.)       10.000     2005       5,000,000      5,075,000 
- -----------------------------------------------------------------------------------------------------------------
BUILDING MATERIALS (1.6%) 
HMH Properties, Inc.                    Sr. Secd. Notes           9.500      2005       5,000,000      5,100,000 
Schuller International Group, Inc.      Sr. Notes                 10.875     2004       5,000,000      5,600,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      10,700,000 
- -----------------------------------------------------------------------------------------------------------------
CABLE (1.5%) 
Comcast Corp.                           Sr. (Subord.) Deb.        10.625     2012       5,000,000      5,700,000 
Fundy Cable Ltd.                        Sr. Secd. Second 
                                        Priority Note             11.000     2005       1,175,000      1,227,875 
Rogers Cable Systems Ltd.               Sr. (Subord.) Gtd. Deb.   11.000     2015       3,000,000      3,345,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      10,272,875 
- -----------------------------------------------------------------------------------------------------------------
CAPITAL GOODS (0.8%) 
Sherrit, Inc.                           Deb.                      10.500     2014       3,000,000      3,375,000 
Tenneco, Inc.                           Notes                     10.375     2000       1,705,000      1,976,112 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       5,351,112 
- -----------------------------------------------------------------------------------------------------------------
CHEMICALS (1.4%) 
Arcadian Partners LP                    Sr. Notes, Series B       10.750     2005       5,000,000      5,500,000 
GI Holdings, Inc. (b)                   Sr. Disc. Notes           10.000     1998       2,275,000      1,831,375 
GI Holdings, Inc. (b)                   Sr. Notes                 10.000     2006       2,166,000      2,239,103 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       9,570,478 
- -----------------------------------------------------------------------------------------------------------------
CONSUMER GOODS (2.6%) 
Bayer Corp.                             Notes                     7.125      2015       9,000,000      8,980,920 
Coty, Inc.                              Sr. Notes (Subord.)       10.250     2005       2,500,000      2,662,500 
Revlon Consumer Products Corp.          Sr. Notes (Subord.)       10.500     2000       5,000,000      5,200,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      16,843,420 
</TABLE>

<PAGE>
PAGE 8
- ------------------------------------
Keystone Diversified Bond Fund (B-2)

SCHEDULE OF INVESTMENTS--February 29, 1996 
(Unaudited) 
<TABLE>
<CAPTION>
                                                               Interest    Maturity       Par          Market
                                                                 Rate       Date         Value          Value
- -----------------------------------------------------------------------------------------------------------------
<S>                                     <C>                       <C>         <C>       <C>           <C>
DIVERSIFIED COMPANIES (3.9%) 
General Electric Capital Corp.          Gtd. Notes                8.750%     2007     $ 10,750,000  $ 11,308,355 
Grand Metropolitan Investment Corp.     Gtd. Sr. Notes            7.450      2035        9,000,000     9,603,990 
Jordan Industries, Inc.                 Sr. Notes                 10.375     2003        5,000,000     4,525,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      25,437,345 
- -----------------------------------------------------------------------------------------------------------------
FINANCE (12.9%) 
American General Financial Corp.        Sr. Notes                 8.125      2009        4,250,000     4,649,755 
American Life Holding Co.               Sr. Notes (Subord.)       11.250     2004        4,000,000     4,280,000 
APP International Finance Co. B. V.     Gtd. Secd. Sr. Notes      11.750     2005        3,000,000     2,940,000 
Banc One Corp.                          Subord. Deb.              7.750      2025       10,000,000    10,520,500 
Comerica, Inc.                          Subord. Notes             7.250      2007        5,000,000     5,167,100 
Commercial Credit Group, Inc.           Notes                     10.000     2009        5,000,000     6,262,950 
Donaldson Lufkin & Jenrette, Inc.       Medium Term Notes         5.625      2016        9,500,000     9,427,040 
European Investment Bank                Deb.                      9.125      2002        6,750,000     7,731,585 
Golden West Financial Corp.             Subord. Notes             6.700      2002        4,450,000     4,466,777 
Lehman Brothers Hldgs., Inc.            Medium Term Notes         6.125      2001        4,500,000     4,433,400 
Marine Midland                          Asset Backed              8.000      2024        4,192,483     4,167,590 
Merita Bank Ltd.                        Subord. Notes             6.500      2006        2,500,000     2,413,125 
Morgan Stanley Inc.                     Coml. Mtge. Certificates  6.475      2027        4,993,360     5,032,370 
Paine Webber Group Inc.                 Medium Term Notes         6.730      2004        9,385,000     9,028,370 
Tembec Finance Corp.                    Sr. Notes                 9.875      2005        5,000,000     4,750,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      85,270,562 
- -----------------------------------------------------------------------------------------------------------------
FOODS (1.2%) 
Cott Corp., Quebec                      Sr. Notes                 9.375      2005        3,500,000     3,570,000 
TLC Beatrice International Holdings 
  Inc.                                  Sr. Secd. Notes           11.500     2005        4,600,000     4,623,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       8,193,000 
- -----------------------------------------------------------------------------------------------------------------
HEALTHCARE (1.0%) 
Dynacare Inc.                           Sr. Notes                 10.750     2006        1,600,000     1,648,000 
Quorum Health Group Inc.                Sr. Notes (Subord.)       8.750      2005        1,175,000     1,222,000 
Tenet Healthcare Corp.                  Sr. Notes                 8.625      2003        3,450,000     3,605,250 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       6,475,250 
- -----------------------------------------------------------------------------------------------------------------
INSURANCE (4.9%) 
CCP Insurance                           Sr. Notes                 10.500     2004        5,000,000     5,625,000 
Chartwell Re Holdings                   Sr. Notes                 10.250     2004        4,000,000     4,280,000 
MBIA, Inc.                              Deb.                      9.375      2011       15,000,000    17,897,850 
Reliance Group Holdings, Inc.           Sr. Deb. (Subord.)        9.750      2003        4,000,000     4,150,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      31,952,850 
- -----------------------------------------------------------------------------------------------------------------
METALS AND MINING (0.5%) 
Koppers Industries, Inc.                Sr. Notes                 8.500      2004        3,500,000     3,465,000 
</TABLE>
                           (continued on next page)                         
<PAGE>
PAGE 9
- ------------------------------------

SCHEDULE OF INVESTMENTS--February 29, 1996 
(Unaudited) 
<TABLE>
<CAPTION>
                                                               Interest    Maturity       Par          Market
                                                                 Rate       Date         Value          Value
- -----------------------------------------------------------------------------------------------------------------
<S>                                     <C>                       <C>        <C>       <C>           <C>
- -----------------------------------------------------------------------------------------------------------------
MUNICIPALS (0.8%) 
Los Angeles, California                 Fire Safety 
                                        Improvements                                   
                                         Assessment Dist. #1      8.480%     2015      $ 5,000,000   $ 5,331,250 
- -----------------------------------------------------------------------------------------------------------------
NATURAL GAS (0.8%) 
TransTexas Gas Corp.                    Sr. Secd. Notes           11.500     2002        5,000,000     5,075,000 
- -----------------------------------------------------------------------------------------------------------------
OFFICE & BUSINESS EQUIPMENT (0.4%) 
Specialty Equipment Companies, Inc.     Sr. Notes (Subord.)       11.375     2003        2,500,000     2,612,500 
- -----------------------------------------------------------------------------------------------------------------
OIL (0.9%) 
Plains Resources, Inc.                  Sr. Notes (Subord.)       12.000     1999        2,000,000     2,110,000 
Stena AB                                Sr. Notes                 10.500     2005        3,500,000     3,587,500 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       5,697,500 
- -----------------------------------------------------------------------------------------------------------------
PAPER & PACKAGING (1.4%) 
Owens Illinois, Inc.                    Deb.                      11.000     2003        3,500,000     3,920,000 
Rainy River Forest Products, Inc.       Sr. Secd. Notes           11.000     2001        5,000,000     5,500,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       9,420,000 
- -----------------------------------------------------------------------------------------------------------------
RETAIL (1.9%) 
Big 5 Holdings, Inc. (f)                Sr. Notes (Subord.)       13.625     2002        1,000,000       740,000 
Cole National Group, Inc.               Sr. Notes                 11.250     2001        4,000,000     4,020,000 
Sears Roebuck Corp.                     Medium Term Notes         6.340      2000        7,890,000     7,901,993 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      12,661,993 
- -----------------------------------------------------------------------------------------------------------------
SERVICES (0.8%) 
Comcast Cellular Corp. (Effective 
  Yield 11.732%)(c)                     Sr. Part. Notes           0.000      2000        3,380,000     2,501,200 
Community Health Systems, Inc.          Sr. Deb. (Subord.)        10.250     2003        2,500,000     2,700,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       5,201,200 
- -----------------------------------------------------------------------------------------------------------------
TELECOMMUNICATIONS (4.7%) 
Adelphia Communications Corp.           Sr. Notes                 12.500     2002        2,000,000     2,095,000 
American Media Operations Corp.         Sr. Notes (Subord.)       11.625     2004        4,000,000     4,150,000 
Bell Cablemedia PLC (Effective 
  Yield 10.640%) (c)                    Sr. Disc. Notes           0.000      2005        4,675,000     3,015,375 
Mobile Telecommunications               Sr. Disc. Notes 
  Technology                            (Subord.)                 13.500     2002        5,000,000     5,400,000 
Pagemart, Inc. (Effective Yield         Unit (Sr. Disc. 
  12.250%) (c)                          Notes/Wts.)               0.000      2003        3,050,000     2,314,188 
Paxson Communications Corp.             Sr. Notes (Subord.)       11.625     2002        3,000,000     3,135,000 
Telewest PLC (Effective Yield 
  9.825%) (c)                           Sr. Disc. Deb.            0.000      2007        8,500,000     5,142,500 
Videotron Group Ltd.                    Voting Conv. Deb.
                                        (Subord.)                 10.625     2005        5,000,000     5,450,000 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      30,702,063 
- -----------------------------------------------------------------------------------------------------------------
TRANSPORTATION (1.2%) 
Eletson Holdings, Inc.                  1st Mtge. Notes           9.250      2003        3,999,500     3,999,500 
Gearbulk Holding Ltd.                   Sr. Notes                 11.250     2004        3,500,000     3,823,750 
- -----------------------------------------------------------------------------------------------------------------

</TABLE>

<PAGE>
PAGE 10
- ------------------------------------
Keystone Diversified Bond Fund (B-2)

SCHEDULE OF INVESTMENTS--February 29, 1996 
(Unaudited) 
<TABLE>
<CAPTION>
                                                               Interest   Maturity       Par          Market
                                                                 Rate      Date         Value          Value
- -----------------------------------     --------------------     ----      ------     ----------      ------- 
<S>                                    <C>                       <C>         <C>       <C>           <C>
UTILITIES (3.1%)                                                                                       7,823,250 
Chugach Electric Association, Inc.      1st Mtge. Bds.            9.140%     2022       $13,150,000 $ 14,658,305 
El Paso Electric Co.                    1st Mtge. Bds.            9.400      2011         4,350,000    4,447,875 
Montana Power Co.                       1st Mtge. Bds.            7.700      1999         1,375,000    1,431,444 
- -----------------------------------------------------------------------------------------------------------------
                                                                                                      20,537,624 
- -----------------------------------------------------------------------------------------------------------------
TOTAL INDUSTRIAL BONDS & NOTES (Cost--$339,829,829)                                                  346,190,522 
- -----------------------------------------------------------------------------------------------------------------
FOREIGN BONDS (U.S. DOLLARS) (3.7%) 
Fomento Economico Mexico                Euro-Dollar               9.500      1997         1,750,000    1,736,875 
Gulf Canada Resources Ltd.              Sr. Notes (Subord.)       9.625      2005         4,500,000    4,792,500 
Indah Kiat International Finance        Gtd. Sr. Secd. 
  Co. B. V.                             Notes                     11.875     2002         3,000,000    3,135,000 
Ispat Mexicana S.A.                     Sr. Unsecd. Deb.          10.375     2001         5,000,000    4,637,500 
Republic of Argentina                   Sr. Notes                 8.375      2003         5,500,000    4,592,500 
Wharf International Capital 1994 Ltd.   Gtd. Notes                8.875      2004         5,500,000    5,718,130 
- -----------------------------------------------------------------------------------------------------------------
TOTAL FOREIGN BONDS (U.S. DOLLARS) (Cost--$22,243,452)                                                24,612,505 
- -----------------------------------------------------------------------------------------------------------------
FOREIGN BONDS (NON U.S. DOLLARS) (10.7%) 
Commonwealth of Canada                  Deb.                      8.750      2005        43,400,000   34,181,574 
                                                                                 Canadian Dollars 
Federal Republic of Germany             Deb.                      6.875      2005        22,250,000   15,607,689 
                                                                                   German Marks 
Kingdom of Spain                        Deb.                      10.150     2006     2,450,000,000   20,377,237 
                                                                                  Spanish Pesetas 
- -----------------------------------------------------------------------------------------------------------------
TOTAL FOREIGN BONDS (NON U.S. DOLLARS) (Cost--$72,380,168)                                            70,166,500 
- -----------------------------------------------------------------------------------------------------------------
COLLATERALIZED MORTGAGE OBLIGATIONS (11.9%) 
Collateralized Mortgage Investors 
  Trust (Est. Mat. 1996) (a)            Series 6 Class D          8.800      2006    $    3,975,800 $  4,012,138 
Criimi Mae Financial Corp. (Est. 
  Mat. 2001) (a)                        Series 1 Class A          7.000      2033         3,492,371    3,436,711 
Debartolo Capital Partnership (Est.     
  Mat. 2000) (a)                        Commercial Mtge. Class B  7.610      2004         9,000,000    9,407,813
FHA Pool #02043143 (Est. Mat. 1999) (a) Blair House Project       9.125      2034         3,284,180    3,545,240 
FHA Pool #02043143 (Est. Mat. 1999) (a) Blair House Project       10.250     2034         2,508,755    2,625,379 
FHLMC (Est. Mat. 2010 ) (a)             Series G8 Class SB        9.600      2023           191,912      143,934 
FHLMC (Est. Mat. 1999) (a)              Series 1666               5.360      2024         6,873,008    4,965,748 
FHLMC REMIC Trust (Est. Mat. 2005)(a)   Series 47, Class A        5.000      2022         5,000,000    4,414,063 
FNMA REMIC Trust (Est. Mat. 1998) (a)   Series 1993 038 Class L   5.000      2022         5,000,000    4,213,050 
Green Tree Financial Corp. (Est.        
  Mat. 1998) (a)                        Series 1994 A Class A     6.900      2004         2,875,055    2,893,024 
Green Tree Financial Corp. (Est.        
  Mat. 1997) (a)                        Series 1994 B Class A     7.850      2004         3,093,219    3,141,535 
Merrill Lynch Mortgage Investors,       
  Inc. (Est. Mat. 1999) (a)             Series 1992 D Class B     8.500      2017         1,674,344    1,739,057 
The Money Store Home Equity Trust                                                 
  (Est. Mat. 1997) (a)                  Series 1995 A Class A     7.925      2014         5,210,000    5,338,791 
</TABLE>
                            (continued on next page)
<PAGE>
PAGE 11
- ------------------------------------
SCHEDULE OF INVESTMENTS--February 29, 1996 
(Unaudited) 
<TABLE>
<CAPTION>
                                                               Interest   Maturity       Par          Market
                                                                 Rate      Date         Value          Value
- -----------------------------------     --------------------     ----      ------     ----------      ------- 
<S>                                    <C>                       <C>         <C>       <C>           <C>
COLLATERALIZED MORTGAGE OBLIGATIONS (Continued) 
Paine Webber Mortgage Acceptance                                   
  Corp. IV (Est. Mat. 1997 ) (a)        Series 1993 5 Class A3   6.875%     2008      $ 4,652,249   $  4,658,065 
Residential Funding Mortgage            
  Securities I (Est. Mat. 1997) (a)     Series 1994 S15 Class A1 7.750      2024        6,499,791      6,587,083 
U.S. Home Equity Loan (Est. Mat.
 1997) (a)                              Series 1991-2 Class B    9.125      2021        4,569,000      4,684,641 
Volvo Car Finance Grantor Trust 
  (Effective Yield 6.62%) (Est.          
  Mat. 1996) (a) (c)                    Series 1993-2 Class A    0.000      1997        1,406,687      1,343,386 
Zale Funding Trust (Est. Mat. 1999)(a)  Series 1994-1 Class A2   7.325      2003       11,000,000     11,312,813 
- -----------------------------------------------------------------------------------------------------------------
TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost--$77,794,427)                                         78,462,471 
- -----------------------------------------------------------------------------------------------------------------
MORTGAGE PASS-THROUGH CERTIFICATES (3.1%) 
FHLMC Pool #W00056                      Gold Pool                 7.500      2010        5,205,498     5,321,008 
Resolution Trust Corp., Mortgage        
  Pass-Through                          Series 1995 Class 2C      7.500      2028        7,250,000     7,152,578 
Structured Asset Securites Corp.        Series 1996 Class B       6.303      2028        8,393,750     8,219,318 
- -----------------------------------------------------------------------------------------------------------------
TOTAL MORTGAGE PASS-THROUGH CERTIFICATES (Cost--$20,860,338)                                          20,692,904 
- -----------------------------------------------------------------------------------------------------------------
UNITED STATES GOVERNMENT ISSUES (13.0%) 
U.S. Treasury Notes                                               6.500      2005        3,750,000     3,837,900 
U.S. Treasury Notes                                               6.750      2000       10,700,000    11,106,279 
U.S. Treasury Bonds                                               6.000      2026       27,570,000    25,829,506 
U.S. Treasury Bonds                                               7.625      2025       25,000,000    28,300,750 
U.S. Treasury Bonds                                               7.875      2021       14,690,000    16,863,679 
- -----------------------------------------------------------------------------------------------------------------
TOTAL UNITED STATES GOVERNMENT ISSUES (Cost--$87,521,352)                                             85,938,114 
- -----------------------------------------------------------------------------------------------------------------
TOTAL FIXED INCOME (COST--$620,629,566)                                                              626,063,016 
- -----------------------------------------------------------------------------------------------------------------
COMMON STOCKS & WARRANTS (0.3%) 
Hollywood Casino Corp. (d)                                                                 485,765     1,943,060 
Pagemart, Inc., wts. (b) (d)                                                                14,030        56,120 
PM Holdings Corp. (d)                                                                        1,618             2 
Reliance Group Holdings, Inc. wts. 
  (d)                                                                                       67,904       135,808 
- -----------------------------------------------------------------------------------------------------------------
TOTAL COMMON STOCKS & WARRANTS (Cost $134,096)                                                         2,134,990 
- -----------------------------------------------------------------------------------------------------------------
                                                                                         Maturity 
                                                                                          Value 
- -----------------------------------     --------------------       ----      ------     -----------      ------- 
REPURCHASE AGREEMENT (0.8%) 
Keystone Joint Repurchase Agreement (Investments in 
  repurchase agreements, in a joint trading account, 
  purchased 2/29/96) (Cost $4,759,000) (e)                        5.415     3/1/96     $ 4,759,716     4,759,000 
- -----------------------------------------------------------------------------------------------------------------
TOTAL INVESTMENTS (Cost--$625,522,662)                                                               632,957,006 
- -----------------------------------------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES--NET (4.0%)                                                              26,454,597 
- -----------------------------------------------------------------------------------------------------------------
NET ASSETS (100%)                                                                                   $659,411,603 
- -----------------------------------------------------------------------------------------------------------------

<PAGE>
PAGE 12
- ------------------------------------
Keystone Diversified Bond Fund (B-2)

SCHEDULE OF INVESTMENTS--February 29, 1996 
  (a) 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. 
  (b) 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. 
  (c) Effective yield (calculated at date of purchase) is the yield at which the bond accretes on an annual basis 
      until maturity date. 
  (d) Non-income producing security. 
  (e) The repurchase agreements are fully collateralized by U.S. government and/or agency obligations based on 
      market prices at February 29, 1996. 
  (f) Illiquid securities which may not be sold or disposed of in the ordinary course of business within seven 
      days at approximately the current market value. The combined value of such securities at February 29, 1996 
      was $740,000 (0.1% of the Fund's net assets at February 29, 1996). 
</TABLE>

      Legend of Portfolio Abbreviations: 
FHA--Federal Housing Administration 
FHLMC--Federal Home Loan Mortgage Corporation 
FNMA--Federal National Mortgage Association 
REMIC--Real Estate Mortgage Investment Conduit 

SCHEDULE OF FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS 
FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS TO SELL 

<TABLE>
<CAPTION>
EXCHANGE                                                U.S. VALUE AT        IN EXCHANGE    NET UNREALIZED 
DATE                                                  FEBRUARY 29, 1996      FOR U.S. $      APPRECIATION 
- -----------------------------------------------------------------------------------------------------------
                                 CONTRACTS TO DELIVER 
              ----------------------------------------------------------- 
<S>         <C>                <C>                    <C>                    <C>              <C>
4/11/96        48,895,000      Canadian Dollars       $35,773,339            $35,640,535          $132,804 
3/05/96        24,600,000      German Marks            17,101,147             16,736,800           364,347 
4/12/96     2,600,000,000      Spanish Pesetas         21,266,154             20,921,175           344,979 
                                                                                              ------------ 
Net Unrealized Appreciation on Forward Foreign Currency Exchange Contracts                        $842,130 
                                                                                              ============ 
</TABLE>
                            (continued on next page)
See Notes to Financial Statements. 

<PAGE>
PAGE 13
- ------------------------------------
FINANCIAL HIGHLIGHTS 
(For a share outstanding throughout each period) 

<TABLE>
<CAPTION>
                                            Six Months 
                                              Ended                         Year Ended August 31, 
                                        February 29, 1996    1995       1994       1993       1992        1991 
================================================================================================================ 
<S>                                     <C>                <C>       <C>       <C>          <C>        <C>
                                           (Unaudited) 
Net asset value beginning of period           $15.09         $15.28    $17.06      $16.44     $15.37     $15.51 
- -----------------------------------------------------------------------------------------------------------------
Income from investment operations 
Net investment income                           0.47           1.06      1.06        1.28       1.33       1.33 
Net realized and unrealized gain 
  (loss) on investments                         0.03           0.11     (1.62)       0.70       1.14       0.17 
- -----------------------------------------------------------------------------------------------------------------
Total from investment operations                0.50           1.17     (0.56)       1.98       2.47       1.50 
- -----------------------------------------------------------------------------------------------------------------
Less distributions from: 
Net investment income                          (0.53)         (1.06)    (1.22)      (1.28)     (1.33)     (1.63) 
In excess of net investment income                 0          (0.22)        0       (0.08)     (0.07)     (0.01) 
Tax basis return of capital                        0          (0.08)        0           0          0          0 
- -----------------------------------------------------------------------------------------------------------------
Total distributions                            (0.53)         (1.36)    (1.22)      (1.36)     (1.40)     (1.64) 
- -----------------------------------------------------------------------------------------------------------------
Net asset value end of period                 $15.06         $15.09    $15.28      $17.06     $16.44     $15.37 
================================================================================================================ 
Total return (a)                                3.30%          8.13%    (3.53%)      12.73%    16.88%     10.58% 
Ratios/supplemental data 
Ratios to average net assets: 
 Total expenses                                 1.81%(b)(c)    1.81%     1.75%       1.89%     1.99%      1.94% 
 Net investment income                          7.05%(c)       7.05%     6.48%       7.73%      8.29%      8.74% 
Portfolio turnover rate                          116%           178%      200%        133%       117%       101% 
- -----------------------------------------------------------------------------------------------------------------
Net assets end of period (thousands)        $659,412       $734,837  $814,245  $1,004,393   $902,339   $814,528 
=================================================================================================================
</TABLE>
(a) Excluding applicable sales charges. 
(b) The annualized expense ratio includes indirectly paid expenses for the 
    six months ended February 29, 1996. Excluding indirectly paid expenses, 
    the expense ratio would have been 1.79%. 
(c) Annualized 

See Notes to Financial Statements. 

<PAGE>
PAGE 14
- ------------------------------------
Keystone Diversified Bond Fund (B-2)

STATEMENT OF ASSETS AND LIABILITIES 
February 29, 1996 (Unaudited) 
<TABLE>
<CAPTION>
=======================================================================
Assets (Note 1) 
<S>                                                     <C>
 Investments at market value (identified 
   cost--$625,522,662)                                  $ 632,957,006 
 Cash                                                             838 
 Receivable for: 
  Investments sold                                         17,295,800 
  Fund shares sold                                            401,912 
  Interest                                                 10,641,600 
 Net unrealized appreciation on forward foreign 
  currency exchange contracts                                 842,130 
 Other assets                                                 144,368 
- -----------------------------------------------------------------------
   Total assets                                           662,283,654 
- -----------------------------------------------------------------------
Liabilities (Notes 1 and 4) 
 Payable for: 
  Fund shares redeemed                                      1,158,776 
  Distributions to shareholders                             1,548,554 
 Due to related parties                                         9,930 
 Other accrued expenses                                       154,791 
- -----------------------------------------------------------------------
   Total liabilities                                        2,872,051 
- -----------------------------------------------------------------------
Net assets                                              $ 659,411,603 
=======================================================================
Net assets represented by (Note 1) 
 Paid-in capital                                        $ 822,388,039 
 Accumulated distributions in excess of net 
  investment  income                                       (4,432,440) 
 Accumulated net realized loss on investments            (166,806,186) 
 Net unrealized appreciation on investments and 
   foreign currency related transactions                    8,262,190 
- -----------------------------------------------------------------------
   Total net assets                                     $ 659,411,603 
======================================================================= 
Net Asset Value Per Share (Note 2) 
 Net asset value of $659,411,603 / 43,798,430 shares 
   outstanding                                          $       15.06 
======================================================================= 
</TABLE>

<TABLE>
<CAPTION>
<S>                                                      <C>               <C>
========================================================================================
 Investment income (Note 1) 
 Interest                                                                   $28,995,321 
- ----------------------------------------------------------------------------------------

Expenses (Notes 2 and 4) 
 Management fee                                          $ 1,851,900 
 Transfer agent fees                                         759,972 
 Accounting, auditing and legal                               30,913 
 Custodian fees                                              165,986 
 Trustees' fees and expenses                                  22,406 
 Distribution Plan expenses                                3,611,183 
 Other                                                        59,265 
- ----------------------------------------------------------------------------------------
  Total expenses                                                              6,501,625 
Less: Expenses paid indirectly (Note 4)                                         (53,084)
- ----------------------------------------------------------------------------------------
 Net expenses                                                                 6,448,541 
- ----------------------------------------------------------------------------------------
Net investment income                                                        22,546,780 
- ----------------------------------------------------------------------------------------
Net realized and unrealized gain on 
   investments and forward foreign 
   currency related transactions 
   (Notes 1 and 3) 
Net realized gain on investments                                              2,756,094 
Net change in unrealized appreciation 
   (depreciation) on: 
 Investments                                              (1,478,560) 
 Forward foreign currency related   transactions             827,846 
- ----------------------------------------------------------------------------------------
Net change in unrealized appreciation 
   (depreciation) on investments and  forward 
  foreign currency related  transactions                                       (650,714)
- ----------------------------------------------------------------------------------------
Net realized and unrealized gain on  investments and 
  forward foreign  currency related transactions                              2,105,380 
- ----------------------------------------------------------------------------------------
Net increase in net assets resulting  from 
  operations                                                                $24,652,160 
========================================================================================
</TABLE>
See Notes to Financial Statements. 

<PAGE>
PAGE 15
- ------------------------------------
STATEMENTS OF CHANGES IN NET ASSETS 

<TABLE>
<CAPTION>
                                                                          Six Months Ended        Year Ended 
                                                                         February 29, 1996     August 31, 1995 
- -------------------------------------------------------------------------------------------------------------- 
<S>                                                                        <C>                  <C>
                                                                            (Unaudited) 
Operations (Notes 1 and 3) 
Net investment income                                                      $  22,546,780        $  53,360,595 
Net realized gain (loss) on investments                                        2,756,094          (25,270,677) 
Net change in unrealized appreciation (depreciation) on investments 
  and forward foreign currency exchange contracts                               (650,714)          29,299,264 
- -------------------------------------------------------------------------------------------------------------- 
 Net increase in net assets resulting from operations                         24,652,160           57,389,182 
- -------------------------------------------------------------------------------------------------------------- 
Distributions to shareholders from (Note 1) 
Net investment income                                                        (24,741,271)         (53,360,595) 
In excess of net investment income                                                     0          (11,593,245) 
Tax basis return of capital                                                            0           (3,726,265) 
- -------------------------------------------------------------------------------------------------------------- 
  Total distributions to shareholders                                        (24,741,271)         (68,680,105) 
- -------------------------------------------------------------------------------------------------------------- 
Capital share transactions (Note 2) 
Proceeds from shares sold                                                     56,741,088          115,263,649 
Payments for shares redeemed                                                (146,368,990)        (222,230,419) 
Net asset value of shares issued in reinvestment of dividends and 
  distributions                                                               14,291,336           38,850,254 
- -------------------------------------------------------------------------------------------------------------- 
 Net decrease in net assets resulting from capital share transactions        (75,336,566)         (68,116,516) 
- -------------------------------------------------------------------------------------------------------------- 
  Total decrease in net assets                                               (75,425,677)         (79,407,439) 
Net assets: 
Beginning of period                                                          734,837,280          814,244,719 
- -------------------------------------------------------------------------------------------------------------- 
End of period [Including accumulated distributions in excess of net 
  investment income as follows: 1996--($4,432,440) and 
  1995--($2,237,949)] (Note 1)                                             $ 659,411,603        $ 734,837,280 
- -------------------------------------------------------------------------------------------------------------- 
</TABLE>
See Notes to Financial Statements. 

<PAGE>
PAGE 16
- ------------------------------------
Keystone Diversified Bond Fund (B-2)

NOTES TO FINANCIAL STATEMENTS (Unaudited) 

(1.) Significant Accounting Policies 

Keystone Diversified Bond Fund (B-2) (formerly Keystone Custodian Fund, 
Series B-2) (the "Fund") is a common law trust for which Keystone Management, 
Inc. ("KMI") is the Investment Manager and Keystone Investment Management 
Company (formerly Keystone Custodian Funds, Inc.) ("Keystone") is the 
Investment Adviser. 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 seeks generous income and capital preservation from a broad 
spectrum of bonds. 

  Keystone is a wholly-owned subsidiary of Keystone Investments Inc. (formerly 
Keystone Group, Inc.) ("KII"), a Delaware corporation. KII is privately owned 
by an investor group consisting predominantly of members of current and 
former management of Keystone and its affiliates. Keystone Investor Resource 
Center, Inc. ("KIRC"), a wholly-owned subsidiary of Keystone, is the Fund's 
transfer and dividend disbursing agent. 

  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 requires 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. Investments are usually valued at the closing sales price or, in the 
absence of sales and for over-the- counter securities, the mean of bid and 
asked quotations. Management values the following securities at prices it 
deems in good faith to be fair: (a) securities (including restricted 
securities) for which complete quotations are not readily available and (b) 
listed securities if, in the opinion of management, the last sales price does 
not reflect a current value or if no sale occurred. Short-term investments 
maturing in sixty days or less are valued at amortized cost (original 
purchase cost as adjusted for amortization of premium or accretion of 
discount), which, when combined with accrued interest, approximates market. 
Short-term investments maturing in more than sixty days for which market 
quotations are readily available are valued at current market value. 
Short-term investments maturing in more than sixty days when purchased which 
are held on the sixtieth day prior to maturity are valued at amortized cost 
(market value on the sixtieth day adjusted for amortization of premium or 
accretion of discount), which, when combined with accrued interest, 
approximates market. Investments denominated in a foreign currency are 
adjusted daily to reflect changes in exchange rates. Market quotations are 
not considered to be readily available for long-term corporate bonds and 
notes; such investments are stated at fair value on the basis of valuations 
furnished by a pricing service, approved by the Trustees, which determines 
valuations for normal institutional-size trading units of such securities 
using methods based on market transactions for comparable securities and 
various relationships between securities which are generally recognized by 
institutional traders. 

B. When the Fund enters into a repurchase agreement (a purchase of securities 
whereby the seller agrees to repurchase the securities at a mutually agreed 
upon date and price) the repurchase price of the securities will generally 
equal the amount paid by the Fund plus a negotiated interest amount. The 
seller under the repurchase agreement will be required to provide securities 
("collateral") to the Fund whose value will be maintained at an amount not 
less than the repurchase price, and which generally will be maintained at 
101% of the repurchase price. The Fund monitors the value of the collateral 
on a daily basis, and if the value of the collateral falls below required 
levels, the Fund intends to seek additional 

<PAGE>
PAGE 17
- ------------------------------------
collateral from the seller or terminate the repurchase agreement. If the 
seller defaults, the Fund would suffer a loss to the extent that the proceeds 
from the sale of the underlying securities were less than the repurchase 
price. Any such loss would be increased by any cost incurred on disposing of 
such securities. If bankruptcy proceedings are commenced against the seller 
under the repurchase agreement, the realization on the collateral may be 
delayed or limited. Repurchase agreements entered into by the Fund will be 
limited to transactions with dealers or domestic banks believed to present 
minimal credit risks, and the Fund will take constructive receipt of all 
securities underlying repurchase agreements until such agreements expire. 

  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. 

C. The Fund enters into currency and other financial futures contracts as a 
hedge against changes in interest or currency rates. A futures contract is an 
agreement between two parties to buy and sell a specific amount of a 
commodity, security, financial instrument, or, in the case of a stock index, 
cash at a set price on a future date. Upon entering into a futures contract 
the Fund is required to deposit with a broker an amount ("initial margin") 
equal to a certain percentage of the purchase price indicated in the futures 
contract. Subsequent payments ("variation margin") are made or received by 
the Fund each day, as the value of the underlying instrument or index 
fluctuates, and are recorded for book purposes as unrealized gains or losses 
by the Fund. For federal tax purposes, any futures contracts which remain 
open at fiscal year-end are marked-to-market and the resultant net gain or 
loss is included in federal taxable income. In addition to market risk, the 
Fund is subject to the credit risk that the other party will not be able to 
complete the obligations of the contract. 

  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 gains/losses are a component of unrealized 
appreciation/depreciation on investments. 

D. In connection with portfolio purchases and sales denominated in a foreign 
currency, the Fund may enter into forward foreign currency exchange contracts 
("contracts") to hedge certain foreign currency assets. 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 is subject to the 
credit risk that the other party will not complete the obligations of the 
contract. 

E. Securities transactions are accounted for on the day after trade date. 
Realized gains and losses are computed on the identified cost basis. Interest 
income is recorded on the accrual basis. All discounts are amortized for both 
financial reporting and federal income tax purposes. 

F. The Fund distributes net investment income to shareholders monthly and net 
capital gains, if any, annually. Distributions to shareholders are recorded 
at the close of business on the ex-dividend date. Distributions are 
determined from taxable net investment income and net capital gains and can 
differ from book basis net investment income and net capital gains. The 
significant differences between financial statement amounts available for 
distribution and distributions made in accordance with income tax regulations 
are 

<PAGE>
PAGE 18
- ------------------------------------
Keystone Diversified Bond Fund (B-2)

primarily due to the different treatment of 12b-1 expenses prior to April 
1995 and net operating losses.Keystone Diversified Bond Fund (B-2) 

G. 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 ("Internal Revenue 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 any excise tax liability by making the required distributions under 
the Internal Revenue Code. 

  (2.) Capital Share Transactions 

  The 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: 
<TABLE>
<CAPTION>
                     Six Months Ended         Year Ended 
                    February 29, 1996       August 31, 1995 
- ----------------    ------------------    ------------------- 
<S>                 <C>                   <C>
Sales                    3,719,224              7,685,412 
Redemptions             (9,572,269)           (14,886,517) 
Reinvestment of 
  dividends and 
  distributions            941,417              2,612,246 
- ----------------      ----------------     ------------------ 
Net decrease            (4,911,628)            (4,588,859) 
- ----------------      ----------------     ------------------ 
</TABLE>
  The Fund bears some of the costs of selling its shares under a Distribution 
Plan adopted pursuant to Rule 12b-1 under the 1940 Act. Under the 
Distribution Plan, the Fund pays Keystone Investment Distributors Company 
(formerly Keystone Distributors, Inc.) ("KIDC"), the principal underwriter 
and a wholly-owned subsidiary of Keystone, amounts which in total may not 
exceed the Distribution Plan maximum. 

  In connection with the Distribution Plan and subject to the limitations 
discussed below, Fund shares are offered for sale at net asset value without 
any initial sales charge. From the amounts received by KIDC in connection 
with the Distribution Plan, and subject to the limitations discussed below, 
KIDC generally pays dealers or others a commission equal to 4.00% of the 
price paid to the Fund for each sale of a Fund share as well as a shareholder 
service fee at a rate of 0.25% per annum of the net asset value of shares 
sold by such brokers or others and maintained on the books of the Fund for 
specified periods. 

  To the extent Fund shares are redeemed within four calendar years of 
original issuance, the Fund may be eligible to receive a deferred sales 
charge from the investor as partial reimbursement for sales commissions 
previously paid on those shares. This charge is based on declining rates, 
which begin at 4.00%, applied to the lesser of the net asset value of shares 
redeemed or the total cost of such shares. 

  The Distribution Plan provides that the Fund may incur certain expenses 
which may not exceed a maximum amount equal to 0.3125% of the Fund's average 
daily net assets for any calendar quarter (approximately 1.25% annually) 
occurring after the inception of the Distribution Plan. Rules adopted by the 
National Association of Securities Dealers, Inc. ("NASD") limit the annual 
expenditures that the Fund may incur under the Distribution Plan to 1% of 
which 0.75% may be used to pay such distribution expenses and 0.25% may be 
used to pay shareholder service fees. NASD rules also will limit the 
aggregate amount which the Fund may pay for such distribution costs to 6.25% 
of gross share sales since the inception of the Fund's 12b-1 Distribution 
Plan, plus interest at the prime rate plus 1.00% on unpaid amounts thereof 
(less any contingent deferred sales charges paid by the shareholders to 
KIDC). 

  KIDC intends, but is not obligated, to continue to pay or accrue 
distribution charges that exceed current annual payments permitted to be 
received by KIDC from the Fund. KIDC intends to seek full payment of 

<PAGE>
PAGE 19
- ------------------------------------
such charges from the Fund (together with annual interest thereon at the 
prime rate plus one percent) at such time in the future as, and to the extent 
that, payment thereof by the Fund would be within permitted limits. KIDC 
currently intends to seek payment of interest only on such charges paid or 
accrued by KIDC subsequent to January 1, 1992. 

  Commencing on July 8, 1992, contingent deferred sales charges applicable to 
shares of the Fund issued after January 1, 1992 have, to the extent permitted 
by a NASD rule, been paid to KIDC rather than to the Fund. 

  During the six months ended February 29, 1996, the Fund paid $3,611,183 
under its Distribution Plan, all of which was paid to KIDC. During the six 
months ended February 29, 1996, KIDC received $2,965,898 after payments of 
commissions on new sales to dealers and others of $645,285. Under a NASD 
rule, the maximum uncollected amount for which KIDC may seek payment from the 
Fund under its Distribution Plan is $19,916,072 (3.02% of the Fund's net 
assets at February 29, 1996). 

(3.) Securities Transactions 

As of August 31, 1995, the Fund had a capital loss carryover for federal 
income tax purposes of approximately $149,889,000 which expires as follows: 
1998--$38,243,000; 1999--$85,002,000; and 2003--$26,644,000. 

  Cost of purchases and proceeds from sales of investment securities excluding 
short-term securities during the six months ended February 29, 1996 were 
$804,305,009 and $889,622,740 respectively. 

(4.) Investment Management Agreement and Other 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 a 
rate of 2.0% of the Fund's gross investment income plus an amount determined 
by applying percentage rates, that start at 0.50% and decline, 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 and receives for its services an annual fee representing 85% of the 
management fee received by KMI. 

  During the six months ended February 29, 1996, the Fund paid or accrued to 
KMI investment management fees of $1,851,900 which represented 0.51% of the 
Fund's average net assets on an annualized basis. Of such amount paid to KMI, 
$1,574,115 was paid to Keystone for its services to the Fund. 

  During the six months ended February 29, 1996, the Fund paid or accrued 
$10,458 to KII for certain accounting services and $759,972 to KIRC for 
transfer agent fees. 

  The Fund has entered into an expense offset arrangement with its custodian. 
For the six months ended February 29, 1996 the Fund paid custody fees in the 
amount of $112,902 and received a credit of $53,084 pursuant to the expense 
offset arrangement resulting in a total expense of $165,986. The assets 
deposited with the custodian under the expense offset arrangement could have 
been invested in income- producing assets. 

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

(5.) Distributions to Shareholders 

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

<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
                INVESTMENTS

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

DBF-SAR-4/96
37.6M

[recycle logo]
<PAGE>

KEYSTONE

[picture of family in woods]

DIVERSIFIED 
BOND FUND (B-2)

[Keystone logo]

SEMIANNUAL REPORT
FEBRUARY 29, 1996






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