FIDELITY INCOME FUND /MA/
N-30D, 1997-09-23
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(2_FIDELITY_LOGOS)FIDELITY
(registered trademark)
 
MORTGAGE SECURITIES FUND
(INITIAL CLASS OF FIDELITY ADVISOR MORTGAGE 
SECURITIES FUND)
ANNUAL REPORT
JULY 31, 1997
CONTENTS
 
 
PRESIDENT'S MESSAGE      3    Ned Johnson on investing                 
                              strategies.                              
 
PERFORMANCE              4    How the fund has done over time.         
 
FUND TALK                7    The manager's review of fund             
                              performance, strategy and outlook.       
 
INVESTMENT CHANGES       10   A summary of major shifts in the         
                              fund's investments over the past six     
                              months.                                  
 
INVESTMENTS              11   A complete list of the fund's            
                              investments with their market            
                              values.                                  
 
FINANCIAL STATEMENTS     14   Statements of assets and liabilities,    
                              operations, and changes in net           
                              assets,                                  
                              as well as financial highlights.         
 
NOTES                    23   Notes to the financial statements.       
 
REPORT OF INDEPENDENT    31   The auditors' opinion.                   
ACCOUNTANTS                                                            
 
DISTRIBUTIONS            32                                            
 
 
THIS REPORT AND THE FINANCIAL STATEMENTS CONTAINED HEREIN ARE SUBMITTED FOR
THE GENERAL 
INFORMATION OF THE SHAREHOLDERS OF THE FUND. THIS REPORT IS NOT AUTHORIZED
FOR DISTRIBUTION TO 
PROSPECTIVE INVESTORS IN THE FUND UNLESS PRECEDED OR ACCOMPANIED BY AN
EFFECTIVE 
PROSPECTUS. 
MUTUAL FUND SHARES ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED BY, 
ANY DEPOSITORY INSTITUTION. SHARES ARE NOT INSURED BY THE FDIC, 
FEDERAL RESERVE BOARD OR ANY OTHER AGENCY, AND ARE SUBJECT TO 
INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL AMOUNT INVESTED. 
NEITHER THE FUND NOR FIDELITY DISTRIBUTORS CORPORATION IS A BANK. 
FOR MORE INFORMATION ON ANY FIDELITY FUND, INCLUDING CHARGES AND EXPENSES,
CALL 
1-800-544-8888 FOR A FREE PROSPECTUS. READ IT CAREFULLY BEFORE YOU INVEST
OR SEND MONEY.
To reduce expenses and demonstrate respect for our environment, we have
initiated a project through which we will begin eliminating duplicate
copies of most financial reports and prospectuses to most households, even
if they have more than one account in the fund. If additional copies of
financial reports, prospectuses or historical account information are
needed, please call 1-800-544-6666.
PRESIDENT'S MESSAGE
 
 
(PHOTO_OF_EDWARD_C_JOHNSON_3D)DEAR SHAREHOLDER:
Through the first seven months of 1997, stock and bond markets experienced
the kind of short-term volatility that can affect them periodically. The
stock market rebounded strongly from its early spring correction to
continue on its record-setting pace, as seen by the roughly 30%
year-to-date gain by the Standard & Poor's 500 Index. The bond market
posted moderate returns over the past seven months, as positive news on the
inflation front helped soften the effects of a hike in short-term interest
rates by the Federal Reserve Board in late March.
While it's impossible to predict the future direction of the markets with
any degree of certainty, there are certain basic principles that can help
investors plan for their future needs.
The longer your investment time frame, the less likely it is that you will
be affected by short-term market volatility. A 10-year investment horizon
appropriate for saving for a college education, for example, enables you to
weather market cycles in a long-term fund, which may have a higher risk
potential, but also has a higher potential rate of return.
An intermediate-length fund could make sense if your investment horizon is
two to four years, while a short-term bond fund could be the right choice
if you need your money in one or two years.
If your time horizon is less than a year, you might want to consider moving
some of your bond investment into a money market fund. These funds seek
income and a stable share price by investing in high-quality, short-term
investments. Of course, it's important to remember that there is no
assurance that a money market fund will achieve its goal of maintaining a
stable net asset value of $1.00 per share, and that these types of funds
are neither insured nor guaranteed by any agency of the U.S. government.
Finally, no matter what your time horizon or portfolio diversity, it makes
good sense to follow a regular investment plan, investing a certain amount
of money in a fund at the same time each month or quarter and periodically
reviewing your overall portfolio. By doing so, you won't get caught up in
the excitement of a rapidly rising market, nor will you buy all your shares
at market highs. While this strategy - known as dollar cost averaging -
won't assure a profit or protect you from a loss in a declining market, it
should help you lower the average cost of your purchases.
If you have questions, please call us at 1-800-544-8888. We are available
24 hours a day, seven days a week to provide you the information you need
to make the investments that are right for you.
Best regards,
Edward C. Johnson 3d
FIDELITY MORTGAGE SECURITIES FUND
PERFORMANCE: THE BOTTOM LINE
 
 
There are several ways to evaluate historical performance. You can look at
the total percentage change in value, the average annual percentage change
or the growth of a hypothetical $10,000 investment. Total return reflects
the change in the value of an investment, assuming reinvestment of the
class' dividend income and capital gains (the profits earned upon the sale
of securities that have grown in value). You can also look at the class'
income, as reflected in its yield, to measure performance.
CUMULATIVE TOTAL RETURNS
PERIODS ENDED JULY 31, 1997                PAST 1   PAST 5   PAST 10   
                                           YEAR     YEARS    YEARS     
 
Fidelity Mortgage Securities Fund          10.34%   44.72%   132.53%   
("Initial Class")                                                      
 
Salomon Brothers Mortgage Index            10.60%   41.23%   143.95%   
 
U.S. Mortgage Funds Average                10.05%   33.27%   114.95%   
 
CUMULATIVE TOTAL RETURNS show Initial Class' performance in percentage
terms over a set period - in this case, one year, five years or 10 years.
For example, if you had invested $1,000 in a fund that had a 5% return over
the past year, the value of your investment would be $1,050. You can
compare Initial Class' returns to the performance of the Salomon Brothers
Mortgage Index - a market capitalization weighted index of 15- and 30-year
fixed-rate securities backed by mortgage pools of the Government National
Mortgage Association (GNMA), Federal National Mortgage Association (FNMA)
and Federal Home Loan Mortgage Corporation (FHLMC), and FNMA and FHLMC
balloon mortgages with fixed-rate coupons. To measure how Initial Class'
performance stacked up against its peers, you can compare it to the U.S.
mortgage funds average, which reflects the performance of mutual funds with
similar objectives tracked by Lipper Analytical Services, Inc. The past one
year average represents a peer group of 59 mutual funds. These benchmarks
reflect reinvestment of dividends and capital gains, if any, and exclude
the effect of sales charges.
AVERAGE ANNUAL TOTAL RETURNS
PERIODS ENDED JULY 31, 1997          PAST 1   PAST 5   PAST 10   
                                     YEAR     YEARS    YEARS     
 
Fidelity Mortgage Securities Fund    10.34%   7.67%    8.80%     
("Initial Class")                                                
 
Salomon Brothers Mortgage Index      10.60%   7.15%    9.33%     
 
U.S. Mortgage Funds Average          10.05%   5.90%    7.93%     
 
AVERAGE ANNUAL TOTAL RETURNS take Initial Class' cumulative return and show
you what would have happened if Initial Class had performed at a constant
rate each year. (Note: Lipper calculates average annual total returns by
annualizing each fund's total return, then taking an arithmetic average.
This may produce a slightly different figure than that obtained by
averaging the cumulative total returns and annualizing the result.)
$10,000 OVER 10 YEARS
IMAHDR PRASUN   SHR__CHT 19970731 19970819 100512 S00000000000001
             Mortgage Secs -Initial Cl   SB Mortgage
             00040                       SB005
  1987/07/31      10000.00                    10000.00
  1987/08/31       9967.99                     9954.81
  1987/09/30       9716.36                     9725.84
  1987/10/31      10004.28                    10044.81
  1987/11/30      10099.69                    10186.41
  1987/12/31      10227.48                    10305.04
  1988/01/31      10571.43                    10704.98
  1988/02/29      10685.42                    10833.40
  1988/03/31      10622.10                    10753.18
  1988/04/30      10556.36                    10686.15
  1988/05/31      10512.46                    10662.80
  1988/06/30      10722.84                    10930.93
  1988/07/31      10697.37                    10897.42
  1988/08/31      10710.95                    10920.39
  1988/09/30      10926.37                    11180.24
  1988/10/31      11131.14                    11434.81
  1988/11/30      10983.96                    11270.62
  1988/12/31      10914.47                    11212.25
  1989/01/31      11112.51                    11423.14
  1989/02/28      11053.67                    11336.52
  1989/03/31      11075.51                    11339.53
  1989/04/30      11279.96                    11539.50
  1989/05/31      11546.92                    11918.36
  1989/06/30      11826.37                    12221.51
  1989/07/31      12038.13                    12511.49
  1989/08/31      11910.98                    12326.96
  1989/09/30      11962.98                    12412.82
  1989/10/31      12200.25                    12702.79
  1989/11/30      12317.82                    12840.25
  1989/12/31      12402.72                    12911.80
  1990/01/31      12288.46                    12818.41
  1990/02/28      12370.32                    12870.38
  1990/03/31      12380.04                    12922.72
  1990/04/30      12272.95                    12802.59
  1990/05/31      12629.75                    13191.99
  1990/06/30      12812.84                    13410.03
  1990/07/31      12999.05                    13637.87
  1990/08/31      12964.67                    13525.65
  1990/09/30      13033.88                    13635.23
  1990/10/31      13167.40                    13778.34
  1990/11/30      13455.52                    14085.64
  1990/12/31      13687.62                    14317.99
  1991/01/31      13829.66                    14527.00
  1991/02/28      13918.20                    14619.27
  1991/03/31      14011.81                    14725.84
  1991/04/30      14163.49                    14879.49
  1991/05/31      14237.12                    15008.29
  1991/06/30      14272.73                    15024.48
  1991/07/31      14477.73                    15278.30
  1991/08/31      14754.40                    15558.48
  1991/09/30      14984.74                    15857.50
  1991/10/31      15161.86                    16102.66
  1991/11/30      15254.55                    16213.00
  1991/12/31      15550.89                    16558.71
  1992/01/31      15476.08                    16390.37
  1992/02/29      15630.07                    16544.40
  1992/03/31      15522.06                    16471.34
  1992/04/30      15667.58                    16621.98
  1992/05/31      15926.18                    16930.41
  1992/06/30      16094.92                    17137.15
  1992/07/31      16067.30                    17273.86
  1992/08/31      16171.23                    17506.59
  1992/09/30      16272.75                    17642.16
  1992/10/31      16110.93                    17493.79
  1992/11/30      16188.80                    17566.09
  1992/12/31      16398.88                    17780.00
  1993/01/31      16548.50                    18024.78
  1993/02/28      16690.23                    18191.23
  1993/03/31      16799.22                    18300.07
  1993/04/30      16916.50                    18423.59
  1993/05/31      16966.59                    18507.95
  1993/06/30      17173.57                    18687.96
  1993/07/31      17267.97                    18765.53
  1993/08/31      17300.12                    18842.74
  1993/09/30      17337.91                    18858.93
  1993/10/31      17368.75                    18922.20
  1993/11/30      17332.45                    18888.68
  1993/12/31      17499.73                    19030.65
  1994/01/31      17660.89                    19221.96
  1994/02/28      17567.76                    19101.83
  1994/03/31      17368.67                    18630.71
  1994/04/30      17292.58                    18513.22
  1994/05/31      17439.79                    18575.73
  1994/06/30      17529.05                    18529.79
  1994/07/31      17809.27                    18891.32
  1994/08/31      17889.06                    18930.10
  1994/09/30      17695.16                    18676.66
  1994/10/31      17731.09                    18671.76
  1994/11/30      17713.40                    18604.73
  1994/12/31      17839.51                    18758.76
  1995/01/31      18176.79                    19178.65
  1995/02/28      18583.72                    19667.47
  1995/03/31      18662.58                    19747.68
  1995/04/30      18956.81                    20012.43
  1995/05/31      19553.27                    20660.92
  1995/06/30      19702.44                    20770.51
  1995/07/31      19747.19                    20811.93
  1995/08/31      19990.85                    21002.86
  1995/09/30      20197.51                    21190.78
  1995/10/31      20422.18                    21385.86
  1995/11/30      20648.30                    21636.66
  1995/12/31      20875.78                    21904.42
  1996/01/31      21046.69                    22072.38
  1996/02/29      20912.59                    21897.27
  1996/03/31      20836.72                    21823.08
  1996/04/30      20793.28                    21722.15
  1996/05/31      20712.78                    21693.91
  1996/06/30      20998.62                    21970.70
  1996/07/31      21073.61                    22058.07
  1996/08/31      21068.96                    22061.84
  1996/09/30      21402.40                    22432.78
  1996/10/31      21798.41                    22868.49
  1996/11/30      22135.19                    23183.32
  1996/12/31      22010.37                    23080.89
  1997/01/31      22148.12                    23276.72
  1997/02/28      22220.32                    23301.95
  1997/03/31      22011.98                    23109.14
  1997/04/30      22355.14                    23460.50
  1997/05/31      22575.67                    23679.30
  1997/06/30      22840.07                    23951.95
  1997/07/31      23253.16                    24395.19
IMATRL PRASUN   SHR__CHT 19970731 19970819 100515 R00000000000123
 
$10,000 OVER 10 YEARS:  Let's say hypothetically that $10,000 was invested
in Fidelity Mortgage Securities Fund ("Initial Class") on July 31, 1987. As
the chart shows, by July 31, 1997, the value of the investment would have
grown to $23,253 - a 132.53% increase on the initial investment. For
comparison, look at how the Salomon Brothers Mortgage Index did over the
same period. With dividends and capital gains, if any, reinvested, the same
$10,000 investment would have grown to $24,395 - a 143.95% increase.
UNDERSTANDING
PERFORMANCE
How a fund did yesterday is 
no guarantee of how it will do 
tomorrow. Bond prices, for 
example, generally move in the 
opposite direction of interest 
rates. In turn, the share price, 
return and yield of a fund that 
invests in bonds will vary. That 
means if you sell your shares 
during a market downturn, you 
might lose money. But if you 
can ride out the market's ups 
and downs, you may have a 
gain.
(checkmark)
TOTAL RETURN COMPONENTS
                         YEARS ENDED JULY 31,                               
 
                  1997   1996                   1995   1994   1993   1992   
 
 
<TABLE>
<CAPTION>
<S>                           <C>   <C>      <C>      <C>      <C>      <C>     <C>      
Dividend return                     6.77%    6.81%    7.46%    5.52%    6.73%   7.64%    
 
Capital appreciation return          3.57%   -0.09%    3.42%   -2.39%   0.74%    3.34%   
 
Total return                        10.34%   6.72%    10.88%   3.13%    7.47%   10.98%   
 
</TABLE>
 
TOTAL RETURN COMPONENTS include both dividend returns and capital
appreciation returns. A dividend return reflects the actual dividends paid
by the class. A capital appreciation return reflects both the amount paid
by the class to shareholders as capital gain distributions and changes in
the class' share price. Both returns assume the dividends or capital gains
paid by the class are reinvested, if any.
DIVIDENDS AND YIELD
PERIODS ENDED JULY 31, 1997    PAST 1        PAST 6         PAST 1         
                               MONTH         MONTHS         YEAR           
 
Dividends per share            5.73(cents)   34.10(cents)   68.86(cents)   
 
Annualized dividend rate       6.13%         6.34%          6.35%          
 
30-day annualized yield        6.41%         -              -              
 
DIVIDENDS per share show the income paid by the class for a set period. If
you annualize this number, based on an average share price of $11.00 over
the past one month, $10.85 over the past six months and $10.84 over the
past one year, you can compare the class' income over these three periods.
The 30-day annualized YIELD is a standard formula for all funds based on
the yields of the bonds in the fund, averaged over the past 30 days. This
figure shows you the yield characteristics of the fund's investments at the
end of the period. It also helps you compare funds from different companies
on an equal basis. 
FUND TALK: THE MANAGER'S OVERVIEW
 
 
 
MARKET RECAP
A favorable inflation backdrop 
steadied fears of higher interest 
rates, buoying the U.S. taxable 
bond market for the 12 months that 
ended July 31, 1997. The Lehman 
Brothers Aggregate Bond Index - 
a broad measure of the U.S. 
taxable bond market - returned 
10.76% over the period. For the 
first eight months of the period, 
bonds suffered from increasing 
expectations of economic growth 
and inflation. In his February 
testimony before Congress, 
Federal Reserve Board Chairman 
Alan Greenspan indicated that the 
Fed was inclined to raise the rate 
banks charge each other for 
overnight loans - known as the 
fed funds target rate - to head off 
inflation that might be caused by a 
tight labor market. On March 25, 
the Fed followed through by 
raising the target rate by 0.25% to 
5.50%. However, this move largely 
had been priced into the market. 
Weakening economic and inflation 
signals - combined with the Fed's 
shift to a more favorable stance 
indicating no intention to raise 
rates in the short term - helped 
spark a rally in all debt markets 
from April through the end of the 
period. Relative interest-rate 
stability provided a positive setting 
for mortgage-backed securities. 
For the 12 months that ended July 
31, 1997, the Salomon Brothers 
Mortgage Index returned 10.60%. 
Sustained economic growth and 
demand from yield-hungry 
investors helped corporate bonds, 
with the Lehman Brothers 
Corporate Bond Index returning 
12.55% over the same period.
NOTE TO SHAREHOLDERS: The following is an interview with Thomas Silvia, who
co-manages Fidelity Advisor Mortgage Securities Fund with Kevin Grant. On
October 1, 1997, Silvia will become the sole Portfolio Manager of the fund.
Q. HOW DID THE FUND PERFORM, TOM?
A. For the 12 months that ended July 31, 1997, the fund's Initial Class
shares returned 10.34%. During the same period, the U.S. mortgage funds
average, according to Lipper Analytical Services, returned 10.05% and the
Salomon Brothers Mortgage Index returned 10.60%.
Q. WHAT HELPED THE FUND'S 
PERFORMANCE DURING THE PERIOD?
A. We continued to get good performance from our small position in
commercial mortgage-backed securities - bonds issued and backed by office
buildings, shopping malls and multi-housing structures. These investments
produced stronger returns than were generated by the overall mortgage
market. In addition, the fund was overweighted relative to the index in
30-year Fannie Mae (Federal National Mortgage Association) discount bonds,
which are priced below par, and current-coupon bonds, which are mortgage
securities that pay a similar coupon - or periodic interest payment - as
those being created at the current market rate. These securities
outperformed comparable 30-year Ginnie Mae (Government National Mortgage
Association) bonds and 15-year mortgage-backed securities during the
period.
Q. WHAT FACTORS IN THE MORTGAGE MARKET AFFECTED THE FUND'S PERFORMANCE?
A. The mortgage market benefited greatly from a period of relatively stable
interest rates. For example, the yield on a 10-year Treasury has lingered
in a range of 6% to 7% for about 18 months - a small fluctuation compared
to the range we've seen over the past 10 years. A calm interest-rate
environment reduces the largest source of risk for mortgage securities -
prepayments. For instance, when interest rates decline, mortgage holders
are likely to refinance their debt at a lower rate. This hurts mortgage
investors because they are forced to reinvest at a lower interest rate. On
the other hand, when interest rates are steady, the risk of prepayments
declines. This has been the case for the past 12 months and, as a result,
the mortgage sector was one of the best-performing categories of the bond
market. 
Q. WHICH AREAS OF THE MORTGAGE MARKET DID YOU TARGET?
A. We retained a small position in commercial mortgage-backed securities,
which was more of a selective investment in a few particular bonds than an
overall sector allocation. The fund also maintained a slightly
underweighted position relative to the index in balloon mortgages. Overall,
the strong performance of the mortgage market during the period reduced the
number of attractive investment opportunities. The reward for taking on
risk was low, so it was a time to hold more liquid securities and keep the
fund's portfolio relatively close to the allocations in the fund's
benchmark index - the Salomon Brothers Mortgage Index.
Q. DID THE FUND'S RELATIVELY SMALL POSITION IN BALLOON MORTGAGES HELP THE
FUND?
A. Balloons are mortgages that are constructed with a typical 30-year
amortization schedule, but differ from the standard mortgage in that the
homeowner agrees to pay the outstanding balance on a specified - or balloon
- - date, usually within five or seven years of issuance. The stable
interest-rate environment benefited the 30-year sector the most, the
15-year sector the second most, and the balloon sector the least.
Consequently, the fund benefited from not having a significant position in
balloons during the period.
Q. WERE THERE ANY DISAPPOINTMENTS DURING THE PERIOD?
A. I think the reduced number of attractive investment alternatives in the
mortgage market was the biggest disappointment. The fund has typically done
its best when the market goes through a dramatic change. That's because our
value-driven, bottom-up security selection process allows us to capitalize
on larger and more frequent misvaluations in the mortgage market. When
everything is trading in so tight a range, there aren't many changes in
values or prepayment options to affect the cash flows of bonds. Therefore,
in a relatively stable environment, we are not able to take advantage of
our research and trading skills to the same degree.
Q. WHAT'S YOUR OUTLOOK FOR THE MORTGAGE MARKET?
A. At the end of the period, we hit a 6% yield on the 10-year Treasury,
which leaves the mortgage market on a cliff. If yields drop below 6%, it
will be an attractive environment for homeowners to refinance and prepay
their mortgages. This likely would cause the mortgage sector to
underperform other types of bonds. On the other hand, if interest rates
remain stable, the mortgage market should continue to perform well.
THE VIEWS EXPRESSED IN THIS REPORT REFLECT THOSE OF THE PORTFOLIO MANAGER
ONLY THROUGH THE END OF THE PERIOD OF THE REPORT AS STATED ON THE COVER.
THE MANAGER'S VIEWS ARE SUBJECT TO CHANGE AT ANY TIME BASED ON MARKET AND
OTHER CONDITIONS.
 
FUND FACTS
GOAL: high current income 
by investing in mortgage 
securities of all kinds
START DATE: December 31, 
1984
SIZE: as of July 31, 1997, 
more than $533 million
MANAGER: Thomas Silvia, 
co-managed since February 
1997; joined Fidelity in 1993
(checkmark)
THOMAS SILVIA ON HIS 
INVESTMENT STRATEGY: 
"The fund's overall market risk 
will be targeted to its 
benchmark, the Salomon 
Brothers Mortgage Index. I 
look to add incremental return 
by the use of a value-driven, 
bottom-up approach to finding 
individual mortgage-backed 
securities that offer higher 
expected returns or 
potentially better price 
performance than securities 
in the benchmark. This 
approach takes advantage of 
the skills offered by our 
quantitative research group, 
as well as our trading desk. In 
addition, I will continue to look 
for opportunities outside of 
the fund's benchmark, such 
as commercial 
mortgage-backed securities."
INVESTMENT CHANGES
 
 
COUPON DISTRIBUTION AS OF JULY 31, 1997
                % OF FUND'S    % OF FUND'S INVESTMENTS   
                INVESTMENTS    6 MONTHS AGO              
 
 Less than 5%    0.1            0.1                      
 
 5 -  5.99%      4.7            6.2                      
 
 6 -  6.99%      25.7           29.3                     
 
 7 -  7.99%      27.0           30.7                     
 
 8 -  8.99%      20.2           12.2                     
 
 9 -  9.99%      6.6            4.0                      
 
10 - 10.99%      3.5            4.4                      
 
11% and over     2.3            3.0                      
 
COUPON DISTRIBUTION SHOWS THE RANGE OF STATED INTEREST RATES ON THE FUND'S
INVESTMENTS, EXCLUDING REPURCHASE AGREEMENTS.
AVERAGE YEARS TO MATURITY AS OF JULY 31, 1997
               6 MONTHS AGO   
 
Years    5.8    6.3           
 
AVERAGE YEARS TO MATURITY IS BASED ON THE AVERAGE TIME UNTIL PRINCIPAL
PAYMENTS ARE EXPECTED FROM EACH OF THE FUND'S BONDS, WEIGHTED BY DOLLAR
AMOUNT.
DURATION AS OF JULY 31, 1997
               6 MONTHS AGO    
 
Years    3.2    4.0            
 
DURATION SHOWS HOW MUCH A BOND FUND'S PRICE FLUCTUATES WITH CHANGES IN
COMPARABLE INTEREST RATES. IF RATES RISE 1%, FOR EXAMPLE, A FUND WITH A
FIVE-YEAR DURATION IS LIKELY TO LOSE ABOUT 5% OF ITS VALUE. OTHER FACTORS
ALSO CAN INFLUENCE A BOND FUND'S PERFORMANCE AND SHARE PRICE. ACCORDINGLY,
A BOND FUND'S ACTUAL PERFORMANCE MAY DIFFER FROM THIS EXAMPLE.
ASSET ALLOCATION (% OF FUND'S INVESTMENTS)
AS OF JULY 31, 1997 AS OF JANUARY 31, 1997 
Row: 1, Col: 1, Value: 9.800000000000001
Row: 1, Col: 2, Value: 2.9
Row: 1, Col: 3, Value: 87.3
Mortgage-backed
securities 87.6%
CMOs and
other mortgage
related securities 2.3%
Short-term
investments 10.1%
Mortgage-backed
securities 87.3%
CMOs and 
other mortgage
related securities 2.8%
Short-term
investments 9.9%
Row: 1, Col: 1, Value: 10.1
Row: 1, Col: 2, Value: 2.3
Row: 1, Col: 3, Value: 87.59999999999999
 
INVESTMENTS JULY 31, 1997 
 
Showing Percentage of Total Value of Investment in Securities
 
 
U.S. GOVERNMENT AGENCY - MORTGAGE-BACKED SECURITIES - 87.3%
  PRINCIPAL VALUE
  AMOUNT (NOTE 1)
FEDERAL HOME LOAN MORTGAGE CORPORATION - 15.7%
5%, 7/1/10  $ 4,019,563 $ 3,795,975
6 1/2%, 1/1/24 to 7/1/24  4,480,017  4,411,427
7%, 5/1/99 to 8/1/12  16,562,905  16,757,226
7 1/2%, 10/1/11 to 7/1/12  35,640,019  36,482,404
7 1/2%, 8/1/27 (e)  3,500,000  3,561,250
8%, 10/1/07 to 12/1/18  767,774  794,814
8 1/2%, 11/1/03 to 1/1/20  2,437,117  2,554,427
9%, 9/1/08 to 5/1/21  11,954,777  12,802,489
10%, 1/1/09 to 5/1/19  2,502,185  2,726,412
10 1/2%, 8/1/10 to 12/1/20  2,723,982  3,011,806
11 1/2%, 4/1/12  111,151  124,061
11 3/4%, 6/1/11  69,701  78,657
12 1/4%, 6/1/14 to 7/1/15  314,042  360,277
12 1/2%, 5/1/12 to 4/1/15  1,236,677  1,428,593
12 3/4%, 6/1/05 to 3/1/15  204,003  229,242
13%, 1/1/11 to 6/1/15  1,855,544  2,187,117
  91,306,177
 
FEDERAL NATIONAL MORTGAGE ASSOCIATION - 40.1%
5 1/2%, 11/1/08 to 5/1/26  24,273,187  23,420,456
6%, 4/1/00 to 5/1/26  87,078,670  84,355,052
6 1/2%, 9/1/10 to 4/1/26  56,791,751  55,821,852
7%, 2/1/24 to 5/1/27  31,698,840  31,684,095
7 1/2%, 3/1/22 to 12/1/22  3,449,394  3,527,311
8%, 1/1/07 to 8/1/27 (e)  15,806,073  16,257,924
8 1/4%, 1/1/13  132,558  137,062
8 1/2%, 11/1/03 to 11/1/18  2,059,489  2,137,174
8 3/4%, 11/1/08 to 7/1/09  296,023  307,877
9%, 1/1/08 to 2/1/13  1,034,999  1,084,078
9 1/2%, 5/1/07 to 8/1/22  8,581,420  9,131,717
11%, 12/1/02 to 8/1/10  2,741,172  3,009,758
12 1/4%, 5/1/13 to 6/1/15  542,105  616,601
12 1/2%, 10/1/13 to 3/1/16  724,646  839,914
12 3/4%, 6/1/13 to 7/1/15  379,431  436,032
13 1/2%, 9/1/13 to 12/1/14  192,548  229,229
14%, 5/1/12 to 11/1/14  64,062  76,803
  233,072,935
 
U.S. GOVERNMENT AGENCY - MORTGAGE-BACKED SECURITIES - CONTINUED
  PRINCIPAL VALUE
  AMOUNT (NOTE 1)
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION - 31.5%
7%, 10/15/22 to 11/15/23 $ 3,665,261 $ 3,683,818
7 1/2%, 7/15/05 to 2/15/27  57,751,910  58,851,736
8%, 4/15/02 to 7/15/27  31,473,025  32,528,616
8 1/2%, 7/15/16 to 8/15/27  54,893,289  57,361,674
9%, 10/15/04 to 4/15/18  6,255,677  6,703,581
9 1/2%, 6/15/09 to 7/15/22  5,351,496  5,776,000
10%, 12/15/17 to 1/15/26  11,883,595  13,152,300
10 1/2%, 11/15/97 to 2/15/18  1,488,065  1,634,033
11%, 1/15/10 to 8/15/17  3,092,191  3,529,873
11 1/2%, 10/15/10 to 7/15/18   98,587  112,208
13%, 10/15/13  104,463  123,952
13 1/2%, 7/15/11 to 10/15/14  97,226  116,364
  183,574,155
TOTAL U.S. GOVERNMENT AGENCY - 
MORTGAGE-BACKED SECURITIES
(Cost $498,582,159)   507,953,267
COLLATERALIZED MORTGAGE OBLIGATIONS - 0.0%
U.S. GOVERNMENT AGENCY - 0.0%
Federal Home Loan Mortgage Corporation 
sequential pay Series 1353 Class A, 
5 1/2%, 11/15/04 (Cost $122,226)  131,183  130,404
COMMERCIAL MORTGAGE SECURITIES - 2.7%
Merrill Lynch Mortgage Investors, Inc. Series 1994-M1 
Class A, 8.1239%, 6/25/22 (d)  5,285,305  5,334,029
Structured Asset Securities Corp. commercial Series 1992-M1
Class C, 7.05%, 11/25/02  3,192,522  2,906,006
SASCO 1997-N1 LLC Series 1997-N1 Class C, 
6.055%, 9/25/28 (b)  5,000,000  5,000,000
SML, Inc. commercial Series 1994-C1
Class C, 9.20%, 9/18/99 (a)  3,280,000  2,693,700
TOTAL COMMERCIAL MORTGAGE SECURITIES
(Cost $14,720,222)   15,933,735
COMPLEX MORTGAGE SECURITIES - 0.1%
  PRINCIPAL VALUE
  AMOUNT (NOTE 1)
INTEREST ONLY STRIPS - 0.1%
SML, Inc. commercial Series 1994-C1 
Class S, 0.81% 9/18/99 (c) (Cost $749,264) $ 51,554,000 $ 612,204
CASH EQUIVALENTS - 9.9%
 MATURITY 
 AMOUNT 
Investments in repurchase agreements 
(U.S. Treasury obligations) in a joint 
trading account at 5.77%, dated 
7/31/97 due 8/1/97 $ 57,639,237  57,630,000
TOTAL INVESTMENT IN SECURITIES - 100%
(Cost $571,803,871)  $ 582,259,610
LEGEND
1. Restricted securities - Investment in securities not registered under
the Securities Act of 1933 (see Note 2 of Notes to Financial Statements). 
Additional information on each holding is as follows:
 ACQUISITION ACQUISITION
SECURITY DATE COST
SML, Inc. 
commercial Series
1994-C1 Class C,
9.20%, 9/18/99  8/11/94  $2,132,820
2. Security exempt from registration under Rule 144A of the Securities Act
of 1933. These securities may be resold in transactions exempt from
registration, normally to qualified institutional buyers. At the period
end, the value of these securities amounted to $5,000,000 or 0.9% of net
assets.
3. Security represents right to receive monthly interest payments on an
underlying pool of mortgages. Principal shown is the par amount of the
mortgage pool.
4. The coupon rate shown on floating or adjustable rate securities
represents the rate at period end.
5. Security purchased on delayed delivery basis (See Note 2 of Notes to
Financial Statements).
INCOME TAX INFORMATION
At July 31, 1997, the aggregate cost of investment securities for income
tax purposes was $571,956,866. Net unrealized appreciation aggregated
$10,302,744, of which $11,091,982 related to appreciated investment
securities and $789,238 related to depreciated investment securities. 
The fund hereby designates approximately $544,000 as a capital gain
dividend for the purpose of the dividend paid deduction.
FINANCIAL STATEMENTS
 
 
STATEMENT OF ASSETS AND LIABILITIES
 
<TABLE>
<CAPTION>
<S>                                                         <C>            <C>             
 JULY 31, 1997                                                                             
 
ASSETS                                                                                     
 
Investment in securities, at value (including repurchase                   $ 582,259,610   
agreements of $57,630,000) (cost $571,803,871) -                                           
See accompanying schedule                                                                  
 
Cash                                                                        115            
 
Receivable for investments sold                                             251,870        
 
Interest receivable                                                         3,066,107      
 
Prepaid expenses                                                            44,595         
 
 TOTAL ASSETS                                                               585,622,297    
 
LIABILITIES                                                                                
 
Payable for investments purchased                           $ 30,194,142                   
Regular Delivery                                                                           
 
 Delayed Delivery                                            19,626,894                    
 
Payable for fund shares redeemed                             1,026,148                     
 
Distributions payable                                        515,582                       
 
Accrued management fee                                       187,169                       
 
Distribution fees payable                                    3,034                         
 
Other payables and accrued expenses                          177,203                       
 
 TOTAL LIABILITIES                                                          51,730,172     
 
NET ASSETS                                                                 $ 533,892,125   
 
Net Assets consist of:                                                                     
 
Paid in capital                                                            $ 519,208,290   
 
Undistributed net investment income                                         230,506        
 
Accumulated undistributed net realized gain (loss)                          3,997,590      
on investments                                                                             
 
Net unrealized appreciation (depreciation) on                               10,455,739     
investments                                                                                
 
NET ASSETS                                                                 $ 533,892,125   
 
</TABLE>
 
STATEMENT OF ASSETS AND LIABILITIES - CONTINUED
 JULY 31, 1997                                                              
 
CALCULATION OF MAXIMUM OFFERING PRICE                              $11.05   
CLASS A:                                                                    
NET ASSET VALUE and redemption price per share                              
 ($1,585,920 (divided by) 143,564 shares)                                   
 
Maximum offering price per share (100/95.75 of $11.05)             $11.54   
 
CLASS T:                                                           $11.05   
NET ASSET VALUE and redemption price per share                              
 ($12,192,905 (divided by) 1,103,680 shares)                                
 
Maximum offering price per share (100/96.50 of $11.05)             $11.45   
 
CLASS B:                                                           $11.04   
NET ASSET VALUE and offering price per share                                
 ($823,411 (divided by) 74,578 shares) A                                    
 
INITIAL CLASS:                                                     $11.05   
NET ASSET VALUE, offering price and redemption price                        
 per share ($506,112,493 (divided by) 45,796,695 shares)                    
 
INSTITUTIONAL CLASS:                                               $11.04   
NET ASSET VALUE, offering price and redemption price                        
 per share ($13,177,396 (divided by) 1,193,472 shares)                      
 
A REDEMPTION PRICE PER SHARE IS EQUAL TO NET ASSET VALUE LESS ANY
APPLICABLE CONTINGENT DEFERRED SALES CHARGE.
STATEMENT OF OPERATIONS
 
<TABLE>
<CAPTION>
<S>                                                        <C>           <C>            
 YEAR ENDED JULY 31, 1997                                                               
 
INVESTMENT INCOME                                                        $ 35,932,141   
Interest                                                                                
 
EXPENSES                                                                                
 
Management fee                                             $ 2,273,788                  
 
Transfer agent fees                                         1,034,760                   
 
Distribution fees                                           4,506                       
 
Accounting fees and expenses                                208,321                     
 
Non-interested trustees' compensation                       9,585                       
 
Custodian fees and expenses                                 79,667                      
 
Registration fees                                           75,411                      
 
Audit                                                       83,730                      
 
Legal                                                       17,684                      
 
Miscellaneous                                               4,396                       
 
 Total expenses before reductions                           3,791,848                   
 
 Expense reductions                                         (52,945)      3,738,903     
 
NET INVESTMENT INCOME                                                     32,193,238    
 
REALIZED AND UNREALIZED GAIN (LOSS)                                       4,296,274     
Net realized gain (loss) on investment securities                                       
 
Change in net unrealized appreciation (depreciation) on                   14,164,021    
investment securities                                                                   
 
NET GAIN (LOSS)                                                           18,460,295    
 
NET INCREASE (DECREASE) IN NET ASSETS RESULTING                          $ 50,653,533   
FROM OPERATIONS                                                                         
 
</TABLE>
 
STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
<S>                                                       <C>             <C>             
                                                          YEAR ENDED      YEAR ENDED      
                                                          JULY 31,        JULY 31,        
                                                          1997            1996            
 
INCREASE (DECREASE) IN NET ASSETS                                                         
 
Operations                                                $ 32,193,238    $ 31,763,051    
Net investment income                                                                     
 
 Net realized gain (loss)                                  4,296,274       8,694,701      
 
 Change in net unrealized appreciation (depreciation)      14,164,021      (11,251,245)   
 
 NET INCREASE (DECREASE) IN NET ASSETS RESULTING           50,653,533      29,206,507     
FROM OPERATIONS                                                                           
 
Distributions to shareholders                              (32,649,725)    (31,178,449)   
From net investment income                                                                
 
 From net realized gain                                    (5,039,533)     (4,055,960)    
 
 TOTAL DISTRIBUTIONS                                       (37,689,258)    (35,234,409)   
 
Share transactions - net increase (decrease)               32,765,543      77,949,164     
 
  TOTAL INCREASE (DECREASE) IN NET ASSETS                  45,729,818      71,921,262     
 
NET ASSETS                                                                                
 
 Beginning of period                                       488,162,307     416,241,045    
 
 End of period (including undistributed net investment    $ 533,892,125   $ 488,162,307   
income of $230,506 and $922,675, respectively)                                            
 
</TABLE>
 
FINANCIAL HIGHLIGHTS - CLASS A
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                            
 
Net asset value, beginning of period                    $ 10.830   
 
Income from Investment Operations                                  
 
 Net investment income                                   .268 F    
 
 Net realized and unrealized gain (loss)                 .224      
 
 Total from investment operations                        .492      
 
Less Distributions                                                 
 
 From net investment income                              (.272)    
 
Net asset value, end of period                          $ 11.050   
 
TOTAL RETURN B, C                                        4.61%     
 
RATIOS AND SUPPLEMENTAL DATA                                       
 
Net assets, end of period (000 omitted)                 $ 1,586    
 
Ratio of expenses to average net assets                  .90% A,   
                                                         D         
 
Ratio of net investment income to average net assets     6.09% A   
 
Portfolio turnover rate                                  149%      
 
A ANNUALIZED
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
C TOTAL RETURNS DO NOT INCLUDE THE ONE TIME SALES CHARGE AND FOR PERIODS OF
LESS THAN ONE YEAR ARE NOT ANNUALIZED.
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF CLASS A SHARES) TO
JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - CLASS T
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                             
 
Net asset value, beginning of period                    $ 10.830    
 
Income from Investment Operations                                   
 
 Net investment income                                   .255 F     
 
 Net realized and unrealized gain (loss)                 .233       
 
 Total from investment operations                        .488       
 
Less Distributions                                                  
 
 From net investment income                              (.268)     
 
Net asset value, end of period                          $ 11.050    
 
TOTAL RETURN B, C                                        4.57%      
 
RATIOS AND SUPPLEMENTAL DATA                                        
 
Net assets, end of period (000 omitted)                 $ 12,193    
 
Ratio of expenses to average net assets                  1.00% A,   
                                                         D          
 
Ratio of net investment income to average net assets     5.99% A    
 
Portfolio turnover rate                                  149%       
 
A ANNUALIZED
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
C TOTAL RETURNS DO NOT INCLUDE THE ONE TIME SALES CHARGE AND FOR PERIODS OF
LESS THAN ONE YEAR ARE NOT ANNUALIZED.
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF CLASS T SHARES) TO
JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - CLASS B
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                             
 
Net asset value, beginning of period                    $ 10.830    
 
Income from Investment Operations                                   
 
 Net investment income                                   .234 F     
 
 Net realized and unrealized gain (loss)                 .214       
 
 Total from investment operations                        .448       
 
Less Distributions                                                  
 
 From net investment income                              (.238)     
 
Net asset value, end of period                          $ 11.040    
 
TOTAL RETURN B, C                                        4.20%      
 
RATIOS AND SUPPLEMENTAL DATA                                        
 
Net assets, end of period (000 omitted)                 $ 823       
 
Ratio of expenses to average net assets                  1.65% A,   
                                                         D          
 
Ratio of net investment income to average net assets     5.34% A    
 
Portfolio turnover rate                                  149%       
 
A ANNUALIZED
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
C TOTAL RETURNS DO NOT INCLUDE THE CONTINGENT DEFERRED SALES CHARGE AND FOR
PERIODS OF LESS THAN ONE YEAR ARE NOT ANNUALIZED.
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF CLASS B SHARES) TO
JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - INITIAL CLASS
 
<TABLE>
<CAPTION>
<S>                               <C>                    <C>         <C>         <C>         <C>         
                                  YEARS ENDED JULY 31,                                                   
 
                                  1997                   1996        1995        1994 C      1993        
 
SELECTED PER-SHARE DATA                                                                                  
 
Net asset value, beginning        $ 10.780               $ 10.890    $ 10.580    $ 10.910    $ 10.830    
of period                                                                                                
 
Income from Investment                                                                                   
Operations                                                                                               
 
 Net investment income             .678 D                 .729        .772        .570        .788       
 
 Net realized and                  .391                   (.015)      .325        (.242)      (.007)     
 unrealized gain (loss)                                                                                  
 
 Total from investment             1.069                  .714        1.097       .328        .781       
 operations                                                                                              
 
Less Distributions                                                                                       
 
 From net investment income        (.689)                 (.724)      (.737)      (.588)      (.701)     
 
 From net realized gain            (.110)                 (.100)      -           (.040)      -          
 
 In excess of net realized         -                      -           (.050)      (.030)      -          
gain                                                                                                     
 
 Total distributions               (.799)                 (.824)      (.787)      (.658)      (.701)     
 
Net asset value, end of period    $ 11.050               $ 10.780    $ 10.890    $ 10.580    $ 10.910    
 
TOTAL RETURN B                     10.34%                 6.72%       10.88%      3.13%       7.47%      
 
RATIOS AND SUPPLEMENTAL                                                                                  
DATA                                                                                                     
 
Net assets, end of period         $ 506,113              $ 488,162   $ 416,241   $ 365,801   $ 419,467   
(000 omitted)                                                                                            
 
Ratio of expenses to average       .73%                   .74%        .77%        .79%        .76%       
net assets                                                                                               
 
Ratio of expenses to average       .73%                   .73%        .77%        .79%        .76%       
net assets after expense                                 A                                               
reductions                                                                                               
 
Ratio of net investment income     6.26%                  6.75%       7.37%       6.73%       7.18%      
                                                                                                         
to average net assets                                                                                    
 
Portfolio turnover rate            149%                   221%        329%        563%        278%       
 
</TABLE>
 
A FMR OR THE FUND HAS ENTERED INTO VARYING ARRANGEMENTS WITH THIRD PARTIES
WHO EITHER PAID OR REDUCED A PORTION OF THE CLASS' EXPENSES.
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN.
C EFFECTIVE AUGUST 1, 1993, THE FUND ADOPTED STATEMENT OF POSITION 93-2,
"DETERMINATION, DISCLOSURE, AND FINANCIAL STATEMENT PRESENTATION OF INCOME,
CAPITAL GAIN, AND RETURN OF CAPITAL DISTRIBUTIONS BY INVESTMENT COMPANIES."
AS A RESULT, NET INVESTMENT INCOME PER SHARE MAY REFLECT CERTAIN
RECLASSIFICATIONS RELATED TO BOOK TO TAX DIFFERENCES.
D NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - INSTITUTIONAL CLASS
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                                        
 
Net asset value, beginning of period                                $ 10.830   
 
Income from Investment Operations                                              
 
 Net investment income                                               .263 F    
 
 Net realized and unrealized gain (loss)                             .226      
 
 Total from investment operations                                    .489      
 
Less Distributions                                                             
 
 From net interest income                                            (.279)    
 
Net asset value, end of period                                      $ 11.040   
 
TOTAL RETURN B, C                                                    4.59%     
 
RATIOS AND SUPPLEMENTAL DATA                                                   
 
Net assets, end of period (000 omitted)                             $ 13,177   
 
Ratio of expenses to average net assets                              .75% A,   
                                                                     D         
 
Ratio of expenses to average net assets after expense reductions     .70% A,   
                                                                     G         
 
Ratio of net investment income to average net assets                 6.29% A   
 
Portfolio turnover rate                                              149%      
 
A ANNUALIZED
B TOTAL RETURNS FOR PERIODS OF LESS THAN ONE YEAR ARE NOT ANNUALIZED.
C THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF INSTITUTIONAL CLASS
SHARES) TO JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
G FMR OR THE FUND HAS ENTERED INTO VARYING ARRANGEMENTS WITH THIRD PARTIES
WHO EITHER PAID OR REDUCED A PORTION OF THE CLASS' EXPENSES (SEE NOTE 5 OF
NOTES TO FINANCIAL STATEMENTS).
NOTES TO FINANCIAL STATEMENTS
For the period ended July 31, 1997
 
   
 
 
1. SIGNIFICANT ACCOUNTING POLICIES.
Fidelity Advisor Mortgage Securities Fund (the fund) is a fund of Fidelity
Income Fund (the trust) and is authorized to issue an unlimited number of
shares. The trust is registered under the Investment Company Act of 1940,
as amended (the 1940 Act), as an open-end management investment company
organized as a Massachusetts business trust. On March 14, 1996, the Board
of Trustees approved the transfer of the fund to the Fidelity Advisor
product line. The Board of Trustees also approved the creation of Class A,
Class T, Class B and Institutional Class shares. Offering of new classes
commenced on March 3, 1997. Prior to March 3, 1997, the fund offered one
class of shares, Fidelity Mortgage Securities Fund ("Initial Class")
(formerly Fidelity Mortgage Securities Fund).
The financial statements have been prepared in conformity with generally
accepted accounting principles which permit management to make certain
estimates and assumptions at the date of the financial statements. The
following summarizes the significant accounting policies of the fund:
SECURITY VALUATION. Securities are valued based upon a computerized matrix
system and/or appraisals by a pricing service, both of which consider
market transactions and dealer-supplied valuations. Securities (including
restricted securities)for which market quotations are not readily available
are valued at their fair value as determined in good faith under
consistently applied procedures under the general supervision of the Board
of Trustees. Short-term securities with remaining maturities of sixty days
or less for which quotations are not readily available are valued at
amortized cost or original cost plus accrued interest, both of which
approximate current value.
INCOME TAXES. As a qualified regulated investment company under Subchapter
M of the Internal Revenue Code, the fund is not subject to income taxes to
the extent that it distributes substantially all of its taxable income for
its fiscal year. The schedule of investments includes information regarding
income taxes under the caption "Income Tax Information."
INVESTMENT INCOME. Interest income, which includes accretion of original
issue discount, is accrued as earned.
EXPENSES. Most expenses of the trust can be directly attributed to a fund.
Expenses which cannot be directly attributed are apportioned between the
funds in the trust.
PREPAID EXPENSES. Fidelity Management & Research Company (FMR) bears all
organizational expenses except for registering and qualifying Class A,
Class T, Class B, and Institutional Class and shares of those classes for
distribution under federal and state securities law. These expenses are
borne by those classes and amortized over one year.
1. SIGNIFICANT ACCOUNTING POLICIES - CONTINUED
DISTRIBUTIONS TO SHAREHOLDERS. Distributions are declared daily and paid
monthly from net investment income. Distributions from realized gains, if
any, are recorded on the ex-dividend date. Income dividends and capital
gain distributions are declared separately for each class.
Income and capital gain distributions are determined in accordance with
income tax regulations which may differ from generally accepted accounting
principles. These differences, which may result in distribution
reclassifications, are primarily due to differing treatments for paydown
gains/losses on certain securities and losses deferred due to wash sales.
The fund also utilized earnings and profits distributed to shareholders on
redemption of shares as a part of the dividends paid deduction for income
tax purposes.
Permanent book and tax basis differences relating to shareholder
distributions will result in reclassifications to paid in capital.
Undistributed net investment income and accumulated undistributed net
realized gain (loss) on investments may include temporary book and tax
basis differences which will reverse in a subsequent period. Any taxable
income or gain remaining at fiscal year end is distributed in the following
year.
SECURITY TRANSACTIONS. Security transactions are accounted for as of trade
date. Gains and losses on securities sold are determined on the basis of
identified cost.
2. OPERATING POLICIES.
JOINT TRADING ACCOUNT. Pursuant to an Exemptive Order issued by the
Securities and Exchange Commission, the fund, along with other affiliated
entities of FMR, may transfer uninvested cash balances into one or more
joint trading accounts. These balances are invested in one or more
repurchase agreements for U.S. Treasury or Federal Agency obligations.
REPURCHASE AGREEMENTS. The underlying U.S. Treasury or Federal Agency
securities are transferred to an account of the fund, or to the Joint
Trading Account, at a bank custodian. The securities are marked-to-market
daily and maintained at a value at least equal to the principal amount of
the repurchase agreement (including accrued interest). FMR, the fund's
investment adviser, is responsible for determining that the value of the
underlying securities remains in accordance with the market value
requirements stated above. 
DELAYED DELIVERY TRANSACTIONS. The fund may purchase or sell securities on
a delayed delivery basis. Payment and delivery may take place a month or
more after the date of the transaction. The price of the underlying
securities and the date when the securities will be delivered and paid for
are fixed at the time the transaction is negotiated. The market values of
the securities purchased or sold on a delayed delivery basis are identified
as such in the fund's schedule of investments. The fund may receive
compensation for
2. OPERATING POLICIES - CONTINUED
DELAYED DELIVERY TRANSACTIONS - CONTINUED
interest forgone in the purchase of a delayed delivery security. With
respect to purchase commitments, the fund identifies securities as
segregated in its custodial records with a value at least equal to the
amount of the commitment. Losses may arise due to changes in the market
value of the underlying securities or if the counterparty does not perform
under the contract. 
RESTRICTED SECURITIES. The fund is permitted to invest in securities that
are subject to legal or contractual restrictions on resale. These
securities generally may be resold in transactions exempt from registration
or to the public if the securities are registered. Disposal of these
securities may involve time-consuming negotiations and expense, and prompt
sale at an acceptable price may be difficult. At the end of the period,
restricted securities (excluding 144A issues) amounted to $2,693,700 or
0.5% of net assets.
3. PURCHASES AND SALES OF INVESTMENTS. 
Purchases and sales of securities, other than short-term securities,
aggregated $790,852,390 and $747,620,591, respectively, of which U.S.
government and government agency obligations aggregated $780,486,825 and
$743,935,902 respectively.
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES. 
MANAGEMENT FEE. As the fund's investment adviser, FMR receives a monthly
fee that is calculated on the basis of a group fee rate plus a fixed
individual fund fee rate applied to the average net assets of the fund. The
group fee rate is the weighted average of a series of rates and is based on
the monthly average net assets of all the mutual funds advised by FMR. The
rates ranged from .1100% to .3700% for the period. The annual individual
fund fee rate is .30%. In the event that these rates were lower than the
contractual rates in effect during the period, FMR voluntarily implemented
the above rates, as they resulted in the same or a lower management fee.
For the period, the management fee was equivalent to an annual rate of .44%
of average net assets.
DISTRIBUTION AND SERVICE PLAN. In accordance with Rule 12b-1 of the 1940
Act, the Trustees have adopted separate distribution plans with respect to
each class of shares (collectively referred to as "the Plans"). Under
certain of the Plans, the class pays Fidelity Distributors Corporation
(FDC), an affiliate of FMR, a distribution and service fee. This fee is
based on the following annual rates of the average net assets of each
applicable class:
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES - CONTINUED
DISTRIBUTION AND SERVICE PLAN - CONTINUED
CLASS A     .15%     
 
CLASS T     .25%     
 
CLASS B     .90% *   
 
* .65% REPRESENTS A DISTRIBUTION FEE AND .25% REPRESENTS A SHAREHOLDER
SERVICE FEE.
For the period, each class paid FDC the following amounts, a portion of
which was paid to securities dealers, banks and other financial
institutions for the distribution of each class' applicable shares, and
providing shareholder support services:
           PAID TO   DEALERS'   
           FDC       PORTION    
 
CLASS A    $ 530     $ 530      
 
CLASS T     2,602     2,602     
 
CLASS B     1,374     1,374     
 
           $ 4,506   $ 4,506    
 
Under the Plans, FMR or FDC may use its resources to pay administrative and
promotional expenses related to the sale of each class' shares. The Plans
also authorize payments to third parties that assist in the sale of each
class' shares or render shareholder support services. 
SALES LOAD. FDC receives a front-end sales charge of up to 4.25% and 3.50%
for selling Class A and Class T shares of the fund, respectively, and the
proceeds of a contingent deferred sales charge levied on Class B share
redemptions occurring within six years of purchase. The Class B charge is
based on declining rates which range from 5% to 1% of the lesser of the
cost of shares at the initial date of purchase or the net asset value of
the redeemed shares, excluding any reinvested dividends and capital gains.
Effective August 1, 1997, Class A's maximum sales charge was increased to
4.75%. 
For the period, FDC received the following sales charge amounts related to
each class, a portion of which is paid to securities, dealers, banks, and
other financial institutions:
           PAID TO    DEALERS'   
           FDC        PORTION    
 
CLASS A    $ 7,090    $ 7,023    
 
CLASS T     9,662      7,492     
 
CLASS B     0          0 *       
 
           $ 16,752   $ 14,515   
 
* WHEN CLASS B SHARES ARE INITIALLY SOLD, FDC PAYS COMMISSIONS FROM ITS OWN
RESOURCES TO DEALERS THROUGH WHICH THE SALES ARE MADE.
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES - CONTINUED
TRANSFER AGENT FEES. Each class of the fund has entered into a separate
transfer, dividend disbursing, and shareholder servicing agent
(collectively referred to as the Transfer Agents) contract with respect to
its shares. The Transfer Agents receive account fees and asset-based fees
that vary according to the account size and type of account of the
shareholders of the respective classes of the fund. FIIOC and FSC pay for
typesetting, printing and mailing of all shareholder reports. For the
period, the following amounts were paid to each transfer agent:
                        TRANSFER   AMOUNT        % OF         
                        AGENT                    AVERAGE      
                                                 NET ASSETS   
 
CLASS A                 FIIOC *    $ 789          .22% **     
 
CLASS T                 FIIOC *     1,513         .14% **     
 
CLASS B                 FIIOC *     881           .57% **     
 
INITIAL CLASS            FSC *      1,028,957     .20%        
 
INSTITUTIONAL CLASS     FIIOC *     2,620         .21% **     
 
                                   $ 1,034,760                
 
* FIDELITY INVESTMENTS INSTITUTIONAL OPERATIONS COMPANY, INC. (FIIOC), AND
FIDELITY SERVICE COMPANY, INC. (FSC), AFFILIATES OF FMR.
** ANNUALIZED
ACCOUNTING FEES. FSC maintains the fund's accounting records. The fee is
based on the level of average net assets for the month plus out-of-pocket
expenses. 
5. EXPENSE REDUCTIONS.
FMR voluntarily agreed to reimburse operating expenses (excluding interest,
taxes, brokerage commissions and extraordinary expenses) above the
following annual rates or range of annual rates of average net assets for
each class:
                       FMR           REIMBURSEME   
                       EXPENSE       NT            
                       LIMITATIONS                 
 
CLASS A                 .90%         $ 10,408      
 
CLASS T                 1.00%         10,413       
 
CLASS B                 1.65%         10,927       
 
INSTITUTIONAL CLASS     .75%          12,094       
 
                                     $ 43,842      
 
5. EXPENSE REDUCTIONS - CONTINUED
In addition, the fund has entered into arrangements with its custodian and
each class' transfer agent whereby credits realized as a result of
uninvested cash balances were used to reduce a portion of expenses. During
the period, the fund's custodian fees were reduced by $8,474 under the
custodian arrangement, and each applicable class' expenses were reduced as
follows under the transfer agent arrangements:
                       TRANSFER    
                       AGENT       
                       INTEREST    
                       CREDITS     
 
INSTITUTIONAL CLASS    $ 629       
 
6. DISTRIBUTIONS TO SHAREHOLDERS.
Distributions to shareholders of each class were as follows:
                                                            
 
                              YEAR ENDED     YEAR ENDED     
                              JULY 31,       JULY 31,       
                              1997 A         1996           
 
CLASS A                                                     
 
From net investment income    $ 21,750       $ -            
 
CLASS T                                                     
 
From net investment income    $ 64,445       $ -            
 
CLASS B                                                     
 
From net investment income    $ 8,241        $ -            
 
INITIAL CLASS                                               
 
From net investment income    $ 32,474,399   $ 31,178,449   
 
From net realized gain         5,039,533      4,055,960     
 
Total                         $ 37,513,932   $ 35,234,409   
                                                            
 
INSTITUTIONAL CLASS                                         
 
From net investment income    $ 80,890       $ -            
 
                              $ 37,689,258   $ 35,234,409   
 
A DISTRIBUTIONS FOR CLASS A, T, B, AND INSTITUTIONAL CLASS ARE FOR THE
PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF SHARES) TO JULY 31, 1997.
7. SHARE TRANSACTIONS.
Share transactions for each class of shares were as follows:
 
<TABLE>
<CAPTION>
<S>                        <C>             <C>             <C>              <C>              
                           SHARES                          DOLLARS                           
 
                           YEAR ENDED      YEAR ENDED      YEAR ENDED       YEAR ENDED       
                           JULY 31,        JULY 31,        JULY 31,         JULY 31,         
 
                           1997 A          1996            1997 A           1996             
 
                                                                                             
 
CLASS A                     141,575         -              $ 1,531,983      $ -              
Shares sold                                                                                  
 
Reinvestment of             1,989           -               21,750           -               
distributions                                                                                
 
Net increase (decrease)     143,564         -              $ 1,553,733      $ -              
 
CLASS T                     1,114,285       -              $ 12,183,453     $ -              
Shares sold                                                                                  
 
Reinvestment of             5,597           -               61,712           -               
distributions                                                                                
 
Shares redeemed             (16,202)        -               (177,848)        -               
 
Net increase (decrease)     1,103,680       -              $ 12,067,317     $ -              
 
CLASS B                     73,891          -              $ 801,025        $ -              
Shares sold                                                                                  
 
Reinvestment of             687             -               7,506            -               
distributions                                                                                
 
Net increase (decrease)     74,578          -              $ 808,531        $ -              
 
INITIAL CLASS               14,636,021      24,584,693     $ 158,564,289    $ 268,954,246    
Shares sold                                                                                  
 
Reinvestment of             2,769,613       2,644,498       29,925,102       28,910,230      
distributions                                                                                
 
Shares redeemed             (16,911,618)    (20,139,279)    (183,183,589)    (219,915,312)   
 
Net increase (decrease)     494,016         7,089,912      $ 5,305,802      $ 77,949,164     
 
INSTITUTIONAL CLASS         1,216,421       -              $ 13,282,379     $ -              
Shares sold                                                                                  
 
Reinvestment of             3,516           -               38,560           -               
distributions                                                                                
 
Shares redeemed             (26,465)        -               (290,779)        -               
 
Net increase (decrease)     1,193,472       -              $ 13,030,160     $ -              
 
</TABLE>
 
A SHARE TRANSACTIONS FOR CLASS A, T, B, AND INSTITUTIONAL CLASS ARE FOR THE
PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF SHARES) TO JULY 31, 1997.
8. REGISTRATION FEES.
For the period, each class paid the following amounts to register its
shares for sale:
                       REGISTRATION   
                       FEES           
 
CLASS A                $ 10,398       
 
CLASS T                 11,098        
 
CLASS B                 10,398        
 
INITIAL CLASS           31,365        
 
INSTITUTIONAL CLASS     12,152        
 
                       $ 75,411       
 
REPORT OF INDEPENDENT ACCOUNTANTS
 
 
To the Trustees of Fidelity Income Fund and the Shareholders of Fidelity
Advisor Mortgage Securities Fund (formerly Fidelity Mortgage Securities
Fund):
In our opinion, the accompanying statement of assets and liabilities,
including the schedule of investments, and the related statements of
operations and of changes in net assets and the financial highlights
present fairly, in all material respects, the financial position of
Fidelity Advisor Mortgage Securities Fund (formerly Fidelity Mortgage
Securities Fund) (a fund of Fidelity Income Fund) at July 31, 1997, the
results of its operations for the year then ended, and the changes in its
net assets and the financial highlights for the periods indicated, in
conformity with generally accepted accounting principles. These financial
statements and financial highlights (hereafter referred to as "financial
statements") are the responsibility of the Fidelity Advisor Mortgage
Securities Fund's management; our responsibility is to express an opinion
on these financial statements based on our audits. We conducted our audits
of these financial statements in accordance with generally accepted
auditing standards which require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial
statements, assessing the accounting principles used and significant
estimates made by management, and evaluating the overall financial
statement presentation. We believe that our audits, which included
confirmation of securities at July 31, 1997 by correspondence with the
custodian and the application of alternative auditing procedures where
securities purchased were not yet received by the custodian, provide a
reasonable basis for the opinion expressed above.
/s/ PRICE WATERHOUSE LLP
PRICE WATERHOUSE LLP
Boston, Massachusetts
September 18, 1997
DISTRIBUTIONS
 
 
The Board of Trustees of Fidelity Advisor Mortgage Securities Fund
(formerly Fidelity Mortgage Securities Fund) voted to pay to shareholders
of record at the opening of business on record date, the following
distributions derived from capital gains realized from sales of portfolio
securities, and dividends derived from net investment income:
 PAY DATE RECORD DATE DIVIDENDS CAPITAL GAINS
Class A 9/8/97 9/5/97 - $.08
Class T 9/8/97 9/5/97 - $.08
Class B 9/8/97 9/5/97 - $.08
Initial Class 9/8/97 9/5/97 - $.08
Institutional Class 9/8/97 9/5/97 - $.08
A total of 0.01% of the dividends distributed during the fiscal year was
derived from interest on U.S. Government securities which is generally
exempt from state income tax.
The fund will notify shareholders in January 1998 of the applicable
percentage for use in preparing 1997 income tax returns.
 
 
 
 
 
 
 
INVESTMENT ADVISER
Fidelity Management & Research Company
Boston, MA
INVESTMENT SUB-ADVISERS
Fidelity Management & Research
 (U.K.) Inc., London, England
Fidelity Management & Research
 (Far East) Inc., Tokyo, Japan
OFFICERS
Edward C. Johnson 3d, President
Robert C. Pozen, Senior Vice President
Fred L. Henning Jr., Vice President
Dwight D. Churchill, Vice President
Kevin Grant, Vice President
Arthur S. Loring, Secretary
Richard A. Silver, Treasurer
John H. Costello, Assistant Treasurer
Leonard M. Rush, Assistant Treasurer
BOARD OF TRUSTEES
Ralph F. Cox *
Phyllis Burke Davis *
Robert M. Gates *
Edward C. Johnson 3d
E. Bradley Jones *
Donald J. Kirk *
Peter S. Lynch
Marvin L. Mann *
William O. McCoy *
Gerald C. McDonough *
Robert C. Pozen
Thomas R. Williams *
ADVISORY BOARD
J. Gary Burkhead
GENERAL DISTRIBUTOR
Fidelity Distributors Corporation
Boston, MA
TRANSFER AND SHAREHOLDER
SERVICING AGENT
Fidelity Service Company, Inc.
Boston, MA
* INDEPENDENT TRUSTEES
CUSTODIAN
The Bank of New York
New York, NY
FIDELITY'S TAXABLE BOND FUNDS
Capital & Income
Ginnie Mae
Global Bond 
Government Securities
Intermediate Bond
Investment Grade Bond
New Markets Income
Short-Intermediate Government
Short-Term Bond 
Spartan(registered trademark) Ginnie Mae
Spartan Government Income
Spartan High Income
Spartan Investment Grade Bond
Spartan Limited Maturity 
 Government
Spartan Short-Intermediate 
Government
Spartan Short-Term Bond
Target Timeline(trademark) 1999, 2001 & 2003
THE FIDELITY TELEPHONE CONNECTION
MUTUAL FUND 24-HOUR SERVICE
Exchanges/Redemptions  1-800-544-7777
Account Assistance 1-800-544-6666
Product Information 1-800-544-8888
Retirement Accounts 1-800-544-4774 
 (8 a.m. - 9 p.m.)
TDD Service 1-800-544-0118
 for the deaf and hearing impaired
 (9 a.m. - 9 p.m. Eastern time)
(registered trademark)
TouchTone Xpress  1-800-544-5555
SM
 AUTOMATED LINE FOR QUICKEST SERVICE
 
 
(2_FIDELITY_LOGOS)FIDELITY ADVISOR
(registered trademark)
 
MORTGAGE SECURITIES 
FUND - CLASS A, CLASS T AND CLASS B
ANNUAL REPORT
JULY 31, 1997
CONTENTS
 
 
PRESIDENT'S MESSAGE      3    Ned Johnson on investing                 
                              strategies.                              
 
PERFORMANCE              4    How the fund has done over time.         
 
FUND TALK                15   The manager's review of fund             
                              performance, strategy and outlook.       
 
INVESTMENT CHANGES       18   A summary of major shifts in the         
                              fund's investments over the past six     
                              months.                                  
 
INVESTMENTS              19   A complete list of the fund's            
                              investments with their market            
                              values.                                  
 
FINANCIAL STATEMENTS     22   Statements of assets and liabilities,    
                              operations, and changes in net           
                              assets,                                  
                              as well as financial highlights.         
 
NOTES                    31   Notes to the financial statements.       
 
REPORT OF INDEPENDENT    39   The auditors' opinion.                   
ACCOUNTANTS                                                            
 
DISTRIBUTIONS            40                                            
 
 
THIS REPORT AND THE FINANCIAL STATEMENTS CONTAINED HEREIN ARE SUBMITTED FOR
THE GENERAL 
INFORMATION OF THE SHAREHOLDERS OF THE FUND. THIS REPORT IS NOT AUTHORIZED
FOR 
DISTRIBUTION TO PROSPECTIVE INVESTORS IN THE FUND UNLESS PRECEDED OR
ACCOMPANIED BY 
AN EFFECTIVE PROSPECTUS. 
MUTUAL FUND SHARES ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED 
BY, ANY DEPOSITORY INSTITUTION. SHARES ARE NOT INSURED BY THE FDIC, 
FEDERAL RESERVE BOARD OR ANY OTHER AGENCY, AND ARE SUBJECT TO 
INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL AMOUNT INVESTED.
NEITHER THE FUND NOR FIDELITY DISTRIBUTORS CORPORATION IS A BANK.
FOR MORE INFORMATION ON ANY FIDELITY ADVISOR FUND, INCLUDING CHARGES AND
EXPENSES, 
CONTACT YOUR INVESTMENT PROFESSIONAL FOR A FREE PROSPECTUS. READ IT
CAREFULLY BEFORE 
YOU INVEST OR 
SEND MONEY.
PRESIDENT'S MESSAGE
 
 
(PHOTO_OF_EDWARD_C_JOHNSON_3D)DEAR SHAREHOLDER:
Through the first seven months of 1997, stock and bond markets experienced
the kind of short-term volatility that can affect them periodically. The
stock market rebounded strongly from its early spring correction to
continue on its record-setting pace, as seen by the roughly 30%
year-to-date gain by the Standard & Poor's 500 Index. The bond market
posted moderate returns over the past seven months, as positive news on the
inflation front helped soften the effects of a hike in short-term interest
rates by the Federal Reserve Board in late March.
While it's impossible to predict the future direction of the markets with
any degree of certainty, there are certain basic principles that can help
investors plan for their future needs.
The longer your investment time frame, the less likely it is that you will
be affected by short-term market volatility. A 10-year investment horizon
appropriate for saving for a college education, for example, enables you to
weather market cycles in a long-term fund, which may have a higher risk
potential, but also has a higher potential rate of return.
An intermediate-length fund could make sense if your investment horizon is
two to four years, while a short-term bond fund could be the right choice
if you need your money in one or two years.
If your time horizon is less than a year, you might want to consider moving
some of your bond investment into a money market fund. These funds seek
income and a stable share price by investing in high-quality, short-term
investments. Of course, it's important to remember that there is no
assurance that a money market fund will achieve its goal of maintaining a
stable net asset value of $1.00 per share, and that these types of funds
are neither insured nor guaranteed by any agency of the U.S. government.
Finally, no matter what your time horizon or portfolio diversity, it makes
good sense to follow a regular investment plan, investing a certain amount
of money in a fund at the same time each month or quarter and periodically
reviewing your overall portfolio. By doing so, you won't get caught up in
the excitement of a rapidly rising market, nor will you buy all your shares
at market highs. While this strategy - known as dollar cost averaging -
won't assure a profit or protect you from a loss in a declining market, it
should help you lower the average cost of your purchases.
Remember to contact your investment professional if you need help with your
investments.
Best regards,
Edward C. Johnson 3d
ADVISOR MORTGAGE SECURITIES FUND - CLASS A
PERFORMANCE: THE BOTTOM LINE
 
 
There are several ways to evaluate historical performance. You can look at
the total percentage change in value, the average annual percentage change
or the growth of a hypothetical $10,000 investment. Total return reflects
the change in the value of an investment, assuming reinvestment of the
class' dividend income and capital gains (the profits earned upon the sale
of securities that have grown in value). You can also look at the class'
income, as reflected in its yield, to measure performance. The initial
offering of Class A shares took place on March 3, 1997. Class A shares bear
a 0.15% 12b-1 fee. Returns prior to March 3, 1997 are those of Initial
Class, the original class of the fund which does not bear a 12b-1 fee. Had
Class A's 12b-1 fee been reflected, returns prior to March 3, 1997 would
have been lower. Effective August 1, 1997, the maximum 4.25% sales charge
on Class A shares was increased to 4.75%. If Fidelity had not reimbursed
certain class expenses, the total returns and dividends would have been
lower.
CUMULATIVE TOTAL RETURNS
PERIODS ENDED JULY 31, 1997                       PAST 1   PAST 5   PAST 10   
                                                  YEAR     YEARS    YEARS     
 
Advisor Mortgage Securities Fund - Class          10.25%   44.60%   132.33%   
A                                                                             
 
Advisor Mortgage Securities Fund - Class          5.01%    37.73%   121.29%   
A  (incl. max. 4.75% sales charge) 1                                          
 
Salomon Brothers Mortgage Index                   10.60%   41.23%   143.95%   
 
U.S. Mortgage Funds Average                       10.05%   33.27%   114.95%   
 
CUMULATIVE TOTAL RETURNS show Class A's performance in percentage terms
over a set period - in this case, one year, five years or 10 years. For
example, if you had invested $1,000 in a fund that had a 5% return over the
past year, the value of your investment would be $1,050. You can compare
Class A's returns to the performance of the Salomon Brothers Mortgage Index
- - a market capitalization weighted index of 15- and 30-year fixed-rate
securities backed by mortgage pools of the Government National Mortgage
Association (GNMA), Federal National Mortgage Association (FNMA) and
Federal Home Loan Mortgage Corporation (FHLMC), and FNMA and FHLMC balloon
mortgages with fixed-rate coupons. To measure how Class A's performance
stacked up against its peers, you can compare it to the U.S. mortgage funds
average, which reflects the performance of mutual funds with similar
objectives tracked by Lipper Analytical Services, Inc. The past one year
average represents a peer group of 59 mutual funds. These benchmarks
reflect reinvestment of dividends and capital gains, if any, and exclude
the effect of sales charges.
AVERAGE ANNUAL TOTAL RETURNS
PERIODS ENDED JULY 31, 1997                   PAST 1   PAST 5   PAST 10   
                                              YEAR     YEARS    YEARS     
 
Advisor Mortgage Securities Fund - Class A    10.25%   7.65%    8.80%     
 
Advisor Mortgage Securities Fund - Class A    5.01%    6.61%    8.27%     
 (incl. max. 4.75% sales charge) 1                                        
 
Salomon Brothers Mortgage Index               10.60%   7.15%    9.33%     
 
U.S. Mortgage Funds Average                   10.05%   5.90%    7.93%     
 
AVERAGE ANNUAL TOTAL RETURNS take Class A's cumulative return and show you
what would have happened if Class A had performed at a constant rate each
year. 
 
1 HAD THE FORMER 4.25% SALES CHARGE BEEN REFLECTED, THE CUMULATIVE AND
AVERAGE ANNUAL RETURNS WOULD HAVE BEEN 5.56% AND 5.56% FOR THE PAST ONE
YEAR, 38.45% AND 6.72% FOR THE PAST FIVE YEARS, AND 122.45% AND 8.32% FOR
THE PAST 10 YEARS.
$10,000 OVER 10 YEARS
IMAHDR PRASUN   SHR__CHT 19970731 19970814 163119 S00000000000001
             FA Mortgage Sec -CL A       SB Mortgage
             00237                       SB005
  1987/07/31       9525.00                    10000.00
  1987/08/31       9494.51                     9954.81
  1987/09/30       9254.84                     9725.84
  1987/10/31       9529.08                    10044.81
  1987/11/30       9619.96                    10186.41
  1987/12/31       9741.67                    10305.04
  1988/01/31      10069.28                    10704.98
  1988/02/29      10177.87                    10833.40
  1988/03/31      10117.55                    10753.18
  1988/04/30      10054.93                    10686.15
  1988/05/31      10013.12                    10662.80
  1988/06/30      10213.51                    10930.93
  1988/07/31      10189.24                    10897.42
  1988/08/31      10202.18                    10920.39
  1988/09/30      10407.37                    11180.24
  1988/10/31      10602.41                    11434.81
  1988/11/30      10462.22                    11270.62
  1988/12/31      10396.03                    11212.25
  1989/01/31      10584.67                    11423.14
  1989/02/28      10528.62                    11336.52
  1989/03/31      10549.42                    11339.53
  1989/04/30      10744.16                    11539.50
  1989/05/31      10998.45                    11918.36
  1989/06/30      11264.62                    12221.51
  1989/07/31      11466.32                    12511.49
  1989/08/31      11345.20                    12326.96
  1989/09/30      11394.74                    12412.82
  1989/10/31      11620.74                    12702.79
  1989/11/30      11732.72                    12840.25
  1989/12/31      11813.59                    12911.80
  1990/01/31      11704.76                    12818.41
  1990/02/28      11782.73                    12870.38
  1990/03/31      11791.98                    12922.72
  1990/04/30      11689.99                    12802.59
  1990/05/31      12029.84                    13191.99
  1990/06/30      12204.23                    13410.03
  1990/07/31      12381.60                    13637.87
  1990/08/31      12348.85                    13525.65
  1990/09/30      12414.77                    13635.23
  1990/10/31      12541.95                    13778.34
  1990/11/30      12816.39                    14085.64
  1990/12/31      13037.46                    14317.99
  1991/01/31      13172.75                    14527.00
  1991/02/28      13257.08                    14619.27
  1991/03/31      13346.25                    14725.84
  1991/04/30      13490.73                    14879.49
  1991/05/31      13560.86                    15008.29
  1991/06/30      13594.77                    15024.48
  1991/07/31      13790.04                    15278.30
  1991/08/31      14053.57                    15558.48
  1991/09/30      14272.96                    15857.50
  1991/10/31      14441.67                    16102.66
  1991/11/30      14529.96                    16213.00
  1991/12/31      14812.22                    16558.71
  1992/01/31      14740.97                    16390.37
  1992/02/29      14887.64                    16544.40
  1992/03/31      14784.76                    16471.34
  1992/04/30      14923.37                    16621.98
  1992/05/31      15169.68                    16930.41
  1992/06/30      15330.41                    17137.15
  1992/07/31      15304.10                    17273.86
  1992/08/31      15403.09                    17506.59
  1992/09/30      15499.79                    17642.16
  1992/10/31      15345.66                    17493.79
  1992/11/30      15419.83                    17566.09
  1992/12/31      15619.94                    17780.00
  1993/01/31      15762.44                    18024.78
  1993/02/28      15897.44                    18191.23
  1993/03/31      16001.26                    18300.07
  1993/04/30      16112.97                    18423.59
  1993/05/31      16160.67                    18507.95
  1993/06/30      16357.82                    18687.96
  1993/07/31      16447.74                    18765.53
  1993/08/31      16478.36                    18842.74
  1993/09/30      16514.36                    18858.93
  1993/10/31      16543.74                    18922.20
  1993/11/30      16509.16                    18888.68
  1993/12/31      16668.50                    19030.65
  1994/01/31      16822.00                    19221.96
  1994/02/28      16733.29                    19101.83
  1994/03/31      16543.66                    18630.71
  1994/04/30      16471.19                    18513.22
  1994/05/31      16611.40                    18575.73
  1994/06/30      16696.42                    18529.79
  1994/07/31      16963.33                    18891.32
  1994/08/31      17039.33                    18930.10
  1994/09/30      16854.64                    18676.66
  1994/10/31      16888.87                    18671.76
  1994/11/30      16872.02                    18604.73
  1994/12/31      16992.14                    18758.76
  1995/01/31      17313.39                    19178.65
  1995/02/28      17700.99                    19667.47
  1995/03/31      17776.11                    19747.68
  1995/04/30      18056.36                    20012.43
  1995/05/31      18624.49                    20660.92
  1995/06/30      18766.57                    20770.51
  1995/07/31      18809.19                    20811.93
  1995/08/31      19041.29                    21002.86
  1995/09/30      19238.12                    21190.78
  1995/10/31      19452.13                    21385.86
  1995/11/30      19667.50                    21636.66
  1995/12/31      19884.18                    21904.42
  1996/01/31      20046.97                    22072.38
  1996/02/29      19919.24                    21897.27
  1996/03/31      19846.97                    21823.08
  1996/04/30      19805.60                    21722.15
  1996/05/31      19728.92                    21693.91
  1996/06/30      20001.19                    21970.70
  1996/07/31      20072.61                    22058.07
  1996/08/31      20068.18                    22061.84
  1996/09/30      20385.79                    22432.78
  1996/10/31      20762.99                    22868.49
  1996/11/30      21083.77                    23183.32
  1996/12/31      20964.88                    23080.89
  1997/01/31      21096.09                    23276.72
  1997/02/28      21164.86                    23301.95
  1997/03/31      20959.15                    23109.14
  1997/04/30      21283.94                    23460.50
  1997/05/31      21491.13                    23679.30
  1997/06/30      21739.47                    23951.95
  1997/07/31      22129.21                    24395.19
IMATRL PRASUN   SHR__CHT 19970731 19970814 163123 R00000000000123
 
$10,000 OVER 10 YEARS:  Let's say hypothetically that $10,000 was invested
in Fidelity Advisor Mortgage Securities Fund - Class A on July 31, 1987,
and the current maximum 4.75% sales charge was paid. As the chart shows, by
July 31, 1997, the value of the investment would have grown to $22,129 - a
121.29% increase on the initial investment. For comparison, look at how the
Salomon Brothers Mortgage Index did over the same period. With dividends
and capital gains, if any, reinvested, the same $10,000 investment would
have grown to $24,395 - a 143.95% increase.
UNDERSTANDING
PERFORMANCE
How a fund did yesterday is 
no guarantee of how it will do 
tomorrow. Bond prices, for 
example, generally move in the 
opposite direction of interest 
rates. In turn, the share price, 
return and yield of a fund that 
invests in bonds will vary. That 
means if you sell your shares 
during a market downturn, you 
might lose money. But if you 
can ride out the market's ups 
and downs, you may have a 
gain.
(checkmark)
TOTAL RETURN COMPONENTS
                         YEARS ENDED JULY 31,                               
 
                  1997   1996                   1995   1994   1993   1992   
 
 
<TABLE>
<CAPTION>
<S>                           <C>   <C>      <C>      <C>      <C>      <C>     <C>      
Dividend return                     6.68%    6.81%    7.46%    5.52%    6.73%   7.64%    
 
Capital appreciation return          3.57%   -0.09%    3.42%   -2.39%   0.74%    3.34%   
 
Total return                        10.25%   6.72%    10.88%   3.13%    7.47%   10.98%   
 
</TABLE>
 
TOTAL RETURN COMPONENTS include both dividend returns and capital
appreciation returns. A dividend return reflects the actual dividends paid
by the class. A capital appreciation return reflects both the amount paid
by the class to shareholders as capital gain distributions and changes in
the class' share price. Both returns assume the dividends or capital gains
paid by the class are reinvested, if any, and exclude the effect of sales
charges.
DIVIDENDS AND YIELD
PERIODS ENDED JULY 31, 1997    PAST 1        LIFE OF        
                               MONTH         CLASS          
 
Dividends per share            5.56(cents)   27.20(cents)   
 
Annualized dividend rate       5.95%         6.07%          
 
30-day annualized yield        n/a           -              
 
DIVIDENDS per share show the income paid by the class for a set period. If
you annualize this number, based on an average share price of $11.00 over
the past one month,  and $10.84 over the life of the class, you can compare
the class' income over these two periods. The 30-day annualized YIELD is a
standard formula for all funds based on the yields of the bonds in the
fund, averaged over the past 30 days. This figure shows you the yield
characteristics of the fund's investments at the end of the period. It also
helps you compare funds from different companies on an equal basis. Yield
information will be reported once Class A has a longer, more stable
operating history.
ADVISOR MORTGAGE SECURITIES FUND - CLASS T
PERFORMANCE: THE BOTTOM LINE
 
 
There are several ways to evaluate historical performance. You can look at
the total percentage change in value, the average annual percentage change
or the growth of a hypothetical $10,000 investment. Total return reflects
the change in the value of an investment, assuming reinvestment of the
class' dividend income and capital gains (the profits earned upon the sale
of securities that have grown in value). You can also look at the class'
income, as reflected in its yield, to measure performance. The initial
offering of Class T shares took place on March 3, 1997. Class T shares bear
a 0.25% 12b-1 fee. Returns prior to March 3, 1997 are those of Initial
Class, the original class of the fund which does not bear a 12b-1 fee. Had
Class T's 12b-1 fee been reflected, returns prior to March 3, 1997 would
have been lower. If Fidelity had not reimbursed certain class expenses, the
total returns and dividends would have been lower.
CUMULATIVE TOTAL RETURNS
PERIODS ENDED JULY 31, 1997                       PAST 1   PAST 5   PAST 10   
                                                  YEAR     YEARS    YEARS     
 
Advisor Mortgage Securities Fund - Class          10.20%   44.54%   132.24%   
T                                                                             
 
Advisor Mortgage Securities Fund - Class          6.35%    39.48%   124.11%   
T  (incl. max. 3.50% sales charge)                                            
 
Salomon Brothers Mortgage Index                   10.60%   41.23%   143.95%   
 
U.S. Mortgage Funds Average                       10.05%   33.27%   114.95%   
 
CUMULATIVE TOTAL RETURNS show Class T's performance in percentage terms
over a set period - in this case, one year, five years or 10 years. For
example, if you had invested $1,000 in a fund that had a 5% return over the
past year, the value of your investment would be $1,050. You can compare
Class T's returns to the performance of the Salomon Brothers Mortgage Index
- - a market capitalization weighted index of 15- and 30-year fixed-rate
securities backed by mortgage pools of the Government National Mortgage
Association (GNMA), Federal National Mortgage Association (FNMA) and
Federal Home Loan Mortgage Corporation (FHLMC), and FNMA and FHLMC balloon
mortgages with fixed-rate coupons. To measure how Class T's performance
stacked up against its peers, you can compare it to the U.S. mortgage funds
average, which reflects the performance of mutual funds with similar
objectives tracked by Lipper Analytical Services, Inc. The past one year
average represents a peer group of 59 mutual funds. These benchmarks
reflect reinvestment of dividends and capital gains, if any, and exclude
the effect of sales charges.
AVERAGE ANNUAL TOTAL RETURNS
PERIODS ENDED JULY 31, 1997                   PAST 1   PAST 5   PAST 10   
                                              YEAR     YEARS    YEARS     
 
Advisor Mortgage Securities Fund - Class T    10.20%   7.65%    8.79%     
 
Advisor Mortgage Securities Fund - Class T    6.35%    6.88%    8.40%     
 (incl. max. 3.50% sales charge)                                          
 
Salomon Brothers Mortgage Index               10.60%   7.15%    9.33%     
 
U.S. Mortgage Funds Average                   10.05%   5.90%    7.93%     
 
AVERAGE ANNUAL TOTAL RETURNS take Class T's cumulative return and show you
what would have happened if Class T had performed at a constant rate each
year. 
$10,000 OVER 10 YEARS
IMAHDR PRASUN   SHR__CHT 19970731 19970814 163147 S00000000000001
             FA Mortgage Sec -CL T       SB Mortgage
             00239                       SB005
  1987/07/31       9650.00                    10000.00
  1987/08/31       9619.11                     9954.81
  1987/09/30       9376.29                     9725.84
  1987/10/31       9654.13                    10044.81
  1987/11/30       9746.20                    10186.41
  1987/12/31       9869.51                    10305.04
  1988/01/31      10201.43                    10704.98
  1988/02/29      10311.43                    10833.40
  1988/03/31      10250.32                    10753.18
  1988/04/30      10186.89                    10686.15
  1988/05/31      10144.52                    10662.80
  1988/06/30      10347.54                    10930.93
  1988/07/31      10322.96                    10897.42
  1988/08/31      10336.07                    10920.39
  1988/09/30      10543.94                    11180.24
  1988/10/31      10741.55                    11434.81
  1988/11/30      10599.52                    11270.62
  1988/12/31      10532.47                    11212.25
  1989/01/31      10723.57                    11423.14
  1989/02/28      10666.79                    11336.52
  1989/03/31      10687.87                    11339.53
  1989/04/30      10885.16                    11539.50
  1989/05/31      11142.78                    11918.36
  1989/06/30      11412.45                    12221.51
  1989/07/31      11616.79                    12511.49
  1989/08/31      11494.09                    12326.96
  1989/09/30      11544.27                    12412.82
  1989/10/31      11773.25                    12702.79
  1989/11/30      11886.70                    12840.25
  1989/12/31      11968.63                    12911.80
  1990/01/31      11858.36                    12818.41
  1990/02/28      11937.36                    12870.38
  1990/03/31      11946.73                    12922.72
  1990/04/30      11843.40                    12802.59
  1990/05/31      12187.71                    13191.99
  1990/06/30      12364.39                    13410.03
  1990/07/31      12544.09                    13637.87
  1990/08/31      12510.91                    13525.65
  1990/09/30      12577.69                    13635.23
  1990/10/31      12706.54                    13778.34
  1990/11/30      12984.58                    14085.64
  1990/12/31      13208.56                    14317.99
  1991/01/31      13345.62                    14527.00
  1991/02/28      13431.06                    14619.27
  1991/03/31      13521.40                    14725.84
  1991/04/30      13667.77                    14879.49
  1991/05/31      13738.82                    15008.29
  1991/06/30      13773.18                    15024.48
  1991/07/31      13971.01                    15278.30
  1991/08/31      14238.00                    15558.48
  1991/09/30      14460.27                    15857.50
  1991/10/31      14631.20                    16102.66
  1991/11/30      14720.65                    16213.00
  1991/12/31      15006.61                    16558.71
  1992/01/31      14934.42                    16390.37
  1992/02/29      15083.02                    16544.40
  1992/03/31      14978.79                    16471.34
  1992/04/30      15119.21                    16621.98
  1992/05/31      15368.76                    16930.41
  1992/06/30      15531.60                    17137.15
  1992/07/31      15504.94                    17273.86
  1992/08/31      15605.23                    17506.59
  1992/09/30      15703.20                    17642.16
  1992/10/31      15547.05                    17493.79
  1992/11/30      15622.19                    17566.09
  1992/12/31      15824.92                    17780.00
  1993/01/31      15969.30                    18024.78
  1993/02/28      16106.07                    18191.23
  1993/03/31      16211.25                    18300.07
  1993/04/30      16324.42                    18423.59
  1993/05/31      16372.76                    18507.95
  1993/06/30      16572.49                    18687.96
  1993/07/31      16663.59                    18765.53
  1993/08/31      16694.62                    18842.74
  1993/09/30      16731.08                    18858.93
  1993/10/31      16760.85                    18922.20
  1993/11/30      16725.81                    18888.68
  1993/12/31      16887.24                    19030.65
  1994/01/31      17042.76                    19221.96
  1994/02/28      16952.89                    19101.83
  1994/03/31      16760.76                    18630.71
  1994/04/30      16687.34                    18513.22
  1994/05/31      16829.40                    18575.73
  1994/06/30      16915.54                    18529.79
  1994/07/31      17185.94                    18891.32
  1994/08/31      17262.94                    18930.10
  1994/09/30      17075.83                    18676.66
  1994/10/31      17110.50                    18671.76
  1994/11/30      17093.43                    18604.73
  1994/12/31      17215.13                    18758.76
  1995/01/31      17540.60                    19178.65
  1995/02/28      17933.29                    19667.47
  1995/03/31      18009.39                    19747.68
  1995/04/30      18293.32                    20012.43
  1995/05/31      18868.91                    20660.92
  1995/06/30      19012.85                    20770.51
  1995/07/31      19056.03                    20811.93
  1995/08/31      19291.17                    21002.86
  1995/09/30      19490.59                    21190.78
  1995/10/31      19707.41                    21385.86
  1995/11/30      19925.61                    21636.66
  1995/12/31      20145.13                    21904.42
  1996/01/31      20310.06                    22072.38
  1996/02/29      20180.65                    21897.27
  1996/03/31      20107.43                    21823.08
  1996/04/30      20065.52                    21722.15
  1996/05/31      19987.83                    21693.91
  1996/06/30      20263.67                    21970.70
  1996/07/31      20336.03                    22058.07
  1996/08/31      20331.54                    22061.84
  1996/09/30      20653.32                    22432.78
  1996/10/31      21035.47                    22868.49
  1996/11/30      21360.46                    23183.32
  1996/12/31      21240.01                    23080.89
  1997/01/31      21372.94                    23276.72
  1997/02/28      21442.61                    23301.95
  1997/03/31      21232.61                    23109.14
  1997/04/30      21559.32                    23460.50
  1997/05/31      21767.26                    23679.30
  1997/06/30      22017.44                    23951.95
  1997/07/31      22411.07                    24395.19
IMATRL PRASUN   SHR__CHT 19970731 19970814 163151 R00000000000123
 
$10,000 OVER 10 YEARS:  Let's say hypothetically that $10,000 was invested
in Fidelity Advisor Mortgage Securities Fund - Class T on July 31, 1987,
and the current maximum 3.50% sales charge was paid. As the chart shows, by
July 31, 1997, the value of the investment would have grown to $22,411 - a
124.11% increase on the initial investment. For comparison, look at how the
Salomon Brothers Mortgage Index did over the same period. With dividends
and capital gains, if any, reinvested, the same $10,000 investment would
have grown to $24,395 - a 143.95% increase.
UNDERSTANDING
PERFORMANCE
How a fund did yesterday is 
no guarantee of how it will do 
tomorrow. Bond prices, for 
example, generally move in the 
opposite direction of interest 
rates. In turn, the share price, 
return and yield of a fund that 
invests in bonds will vary. That 
means if you sell your shares 
during a market downturn, you 
might lose money. But if you 
can ride out the market's ups 
and downs, you may have a 
gain.
(checkmark)
TOTAL RETURN COMPONENTS
                         YEARS ENDED JULY 31,                               
 
                  1997   1996                   1995   1994   1993   1992   
 
 
<TABLE>
<CAPTION>
<S>                           <C>   <C>      <C>      <C>      <C>      <C>     <C>      
Dividend return                     6.63%    6.81%    7.46%    5.52%    6.73%   7.64%    
 
Capital appreciation return          3.57%   -0.09%    3.42%   -2.39%   0.74%    3.34%   
 
Total return                        10.20%   6.72%    10.88%   3.13%    7.47%   10.98%   
 
</TABLE>
 
TOTAL RETURN COMPONENTS include both dividend returns and capital
appreciation returns. A dividend return reflects the actual dividends paid
by the class. A capital appreciation return reflects both the amount paid
by the class to shareholders as capital gain distributions and changes in
the class' share price. Both returns assume the dividends or capital gains
paid by the class are reinvested, if any, and exclude the effect of sales
charges.
DIVIDENDS AND YIELD
PERIODS ENDED JULY 31, 1997    PAST 1        LIFE OF        
                               MONTH         CLASS          
 
Dividends per share            5.51(cents)   26.78(cents)   
 
Annualized dividend rate       5.90%         5.97%          
 
30-day annualized yield        n/a           -              
 
DIVIDENDS per share show the income paid by the class for a set period. If
you annualize this number, based on an average share price of $11.00 over
the past one month,  and $10.84 over the life of the class, you can compare
the class' income over these two periods. The 30-day annualized YIELD is a
standard formula for all funds based on the yields of the bonds in the
fund, averaged over the past 30 days. This figure shows you the yield
characteristics of the fund's investments at the end of the period. It also
helps you compare funds from different companies on an equal basis. Yield
information will be reported once Class T has a longer, more stable
operating history.
ADVISOR MORTGAGE SECURITIES FUND - CLASS B
PERFORMANCE: THE BOTTOM LINE
 
 
There are several ways to evaluate historical performance. You can look at
the total percentage change in value, the average annual percentage change
or the growth of a hypothetical $10,000 investment. Total return reflects
the change in the value of an investment, assuming reinvestment of the
class' dividend income and capital gains (the profits earned upon the sale
of securities that have grown in value). You can also look at the class'
income, as reflected in its yield, to measure performance. The initial
offering of Class B shares took place on March 3, 1997. Class B shares bear
a .90% 12b-1 fee. Returns prior to March 3, 1997 are those of Initial
Class, the original class of the fund, which does not bear a 12b-1 fee. Had
Class B's 12b-1 fee been reflected, returns prior to March 3, 1997 would
have been lower. Class B's contingent deferred sales charges included in
the past one year, past five years and past 10 years total return figures
are 5%, 2% and 0%, respectively. If Fidelity had not reimbursed certain
class expenses, the total returns and dividends would have been lower. 
CUMULATIVE TOTAL RETURNS
PERIODS ENDED JULY 31, 1997                         PAST 1   PAST 5   PAST 10   
                                                    YEAR     YEARS    YEARS     
 
Advisor Mortgage Securities Fund - Class            9.81%    44.02%   131.40%   
B                                                                               
 
Advisor Mortgage Securities Fund - Class            4.81%    42.02%   131.40%   
B  (incl. contingent deferred sales charge)                                     
 
Salomon Brothers Mortgage Index                     10.60%   41.23%   143.95%   
 
U.S. Mortgage Funds Average                         10.05%   33.27%   114.95%   
 
CUMULATIVE TOTAL RETURNS show Class B's performance in percentage terms
over a set period - in this case, one year, five years or 10 years. For
example, if you had invested $1,000 in a fund that had a 5% return over the
past year, the value of your investment would be $1,050. You can compare
Class B's returns to the performance of the Salomon Brothers Mortgage Index
- - a market capitalization weighted index of 15- and 30-year fixed-rate
securities backed by mortgage pools of the Government National Mortgage
Association (GNMA), Federal National Mortgage Association (FNMA) and
Federal Home Loan Mortgage Corporation (FHLMC), and FNMA and FHLMC balloon
mortgages with fixed-rate coupons. To measure how Class B's performance
stacked up against its peers, you can compare it to the U.S. mortgage funds
average, which reflects the performance of mutual funds with similar
objectives tracked by Lipper Analytical Services, Inc. The past one year
average represents a peer group of 59 mutual funds. These benchmarks
reflect reinvestment of dividends and capital gains, if any, and exclude
the effect of sales charges.
AVERAGE ANNUAL TOTAL RETURNS
PERIODS ENDED JULY 31, 1997                   PAST 1   PAST 5   PAST 10   
                                              YEAR     YEARS    YEARS     
 
Advisor Mortgage Securities Fund - Class B    9.81%    7.57%    8.75%     
 
Advisor Mortgage Securities Fund - Class B    4.81%    7.27%    8.75%     
 (incl. contingent deferred sales charge)                                 
 
Salomon Brothers Mortgage Index               10.60%   7.15%    9.33%     
 
U.S. Mortgage Funds Average                   10.05%   5.90%    7.93%     
 
AVERAGE ANNUAL TOTAL RETURNS take the Class B's cumulative return and show
you what would have happened if Class B had performed at a constant rate
each year. 
$10,000 OVER 10 YEARS
IMAHDR PRASUN   SHR__CHT 19970731 19970814 163127 S00000000000001
             FA Mortgage Sec -CL B       SB Mortgage
             00238                       SB005
  1987/07/31      10000.00                    10000.00
  1987/08/31       9967.99                     9954.81
  1987/09/30       9716.36                     9725.84
  1987/10/31      10004.28                    10044.81
  1987/11/30      10099.69                    10186.41
  1987/12/31      10227.48                    10305.04
  1988/01/31      10571.43                    10704.98
  1988/02/29      10685.42                    10833.40
  1988/03/31      10622.10                    10753.18
  1988/04/30      10556.36                    10686.15
  1988/05/31      10512.46                    10662.80
  1988/06/30      10722.84                    10930.93
  1988/07/31      10697.37                    10897.42
  1988/08/31      10710.95                    10920.39
  1988/09/30      10926.37                    11180.24
  1988/10/31      11131.14                    11434.81
  1988/11/30      10983.96                    11270.62
  1988/12/31      10914.47                    11212.25
  1989/01/31      11112.51                    11423.14
  1989/02/28      11053.67                    11336.52
  1989/03/31      11075.51                    11339.53
  1989/04/30      11279.96                    11539.50
  1989/05/31      11546.92                    11918.36
  1989/06/30      11826.37                    12221.51
  1989/07/31      12038.13                    12511.49
  1989/08/31      11910.98                    12326.96
  1989/09/30      11962.98                    12412.82
  1989/10/31      12200.25                    12702.79
  1989/11/30      12317.82                    12840.25
  1989/12/31      12402.72                    12911.80
  1990/01/31      12288.46                    12818.41
  1990/02/28      12370.32                    12870.38
  1990/03/31      12380.04                    12922.72
  1990/04/30      12272.95                    12802.59
  1990/05/31      12629.75                    13191.99
  1990/06/30      12812.84                    13410.03
  1990/07/31      12999.05                    13637.87
  1990/08/31      12964.67                    13525.65
  1990/09/30      13033.88                    13635.23
  1990/10/31      13167.40                    13778.34
  1990/11/30      13455.52                    14085.64
  1990/12/31      13687.62                    14317.99
  1991/01/31      13829.66                    14527.00
  1991/02/28      13918.20                    14619.27
  1991/03/31      14011.81                    14725.84
  1991/04/30      14163.49                    14879.49
  1991/05/31      14237.12                    15008.29
  1991/06/30      14272.73                    15024.48
  1991/07/31      14477.73                    15278.30
  1991/08/31      14754.40                    15558.48
  1991/09/30      14984.74                    15857.50
  1991/10/31      15161.86                    16102.66
  1991/11/30      15254.55                    16213.00
  1991/12/31      15550.89                    16558.71
  1992/01/31      15476.08                    16390.37
  1992/02/29      15630.07                    16544.40
  1992/03/31      15522.06                    16471.34
  1992/04/30      15667.58                    16621.98
  1992/05/31      15926.18                    16930.41
  1992/06/30      16094.92                    17137.15
  1992/07/31      16067.30                    17273.86
  1992/08/31      16171.23                    17506.59
  1992/09/30      16272.75                    17642.16
  1992/10/31      16110.93                    17493.79
  1992/11/30      16188.80                    17566.09
  1992/12/31      16398.88                    17780.00
  1993/01/31      16548.50                    18024.78
  1993/02/28      16690.23                    18191.23
  1993/03/31      16799.22                    18300.07
  1993/04/30      16916.50                    18423.59
  1993/05/31      16966.59                    18507.95
  1993/06/30      17173.57                    18687.96
  1993/07/31      17267.97                    18765.53
  1993/08/31      17300.12                    18842.74
  1993/09/30      17337.91                    18858.93
  1993/10/31      17368.75                    18922.20
  1993/11/30      17332.45                    18888.68
  1993/12/31      17499.73                    19030.65
  1994/01/31      17660.89                    19221.96
  1994/02/28      17567.76                    19101.83
  1994/03/31      17368.67                    18630.71
  1994/04/30      17292.58                    18513.22
  1994/05/31      17439.79                    18575.73
  1994/06/30      17529.05                    18529.79
  1994/07/31      17809.27                    18891.32
  1994/08/31      17889.06                    18930.10
  1994/09/30      17695.16                    18676.66
  1994/10/31      17731.09                    18671.76
  1994/11/30      17713.40                    18604.73
  1994/12/31      17839.51                    18758.76
  1995/01/31      18176.79                    19178.65
  1995/02/28      18583.72                    19667.47
  1995/03/31      18662.58                    19747.68
  1995/04/30      18956.81                    20012.43
  1995/05/31      19553.27                    20660.92
  1995/06/30      19702.44                    20770.51
  1995/07/31      19747.19                    20811.93
  1995/08/31      19990.85                    21002.86
  1995/09/30      20197.51                    21190.78
  1995/10/31      20422.18                    21385.86
  1995/11/30      20648.30                    21636.66
  1995/12/31      20875.78                    21904.42
  1996/01/31      21046.69                    22072.38
  1996/02/29      20912.59                    21897.27
  1996/03/31      20836.72                    21823.08
  1996/04/30      20793.28                    21722.15
  1996/05/31      20712.78                    21693.91
  1996/06/30      20998.62                    21970.70
  1996/07/31      21073.61                    22058.07
  1996/08/31      21068.96                    22061.84
  1996/09/30      21402.40                    22432.78
  1996/10/31      21798.41                    22868.49
  1996/11/30      22135.19                    23183.32
  1996/12/31      22010.37                    23080.89
  1997/01/31      22148.12                    23276.72
  1997/02/28      22220.32                    23301.95
  1997/03/31      21990.91                    23109.14
  1997/04/30      22319.38                    23460.50
  1997/05/31      22500.12                    23679.30
  1997/06/30      22767.11                    23951.95
  1997/07/31      23139.91                    24395.19
IMATRL PRASUN   SHR__CHT 19970731 19970814 163131 R00000000000123
 
$10,000 OVER 10 YEARS:  Let's say hypothetically that $10,000 was invested
in Fidelity Advisor Mortgage Securities Fund - Class B on July 31, 1987. As
the chart shows, by July 31, 1997, the value of the investment would have
grown to $23,140 - a 131.40% increase on the initial investment. For
comparison, look at how the Salomon Brothers Mortgage Index did over the
same period. With dividends and capital gains, if any, reinvested, the same
$10,000 investment would have grown to $24,395 - a 143.95% increase.
UNDERSTANDING
PERFORMANCE
How a fund did yesterday is 
no guarantee of how it will do 
tomorrow. Bond prices, for 
example, generally move in the 
opposite direction of interest 
rates. In turn, the share price, 
return and yield of a fund that 
invests in bonds will vary. That 
means if you sell your shares 
during a market downturn, you 
might lose money. But if you 
can ride out the market's ups 
and downs, you may have a 
gain.
(checkmark)
TOTAL RETURN COMPONENTS
                         YEARS ENDED JULY 31,                               
 
                  1997   1996                   1995   1994   1993   1992   
 
 
<TABLE>
<CAPTION>
<S>                           <C>   <C>     <C>      <C>      <C>      <C>     <C>      
Dividend return                     6.33%   6.81%    7.46%    5.52%    6.73%   7.64%    
 
Capital appreciation return         3.48%   -0.09%    3.42%   -2.39%   0.74%    3.34%   
 
Total return                        9.81%   6.72%    10.88%   3.13%    7.47%   10.98%   
 
</TABLE>
 
TOTAL RETURN COMPONENTS include both dividend returns and capital
appreciation returns. A dividend return reflects the actual dividends paid
by the class. A capital appreciation return reflects both the amount paid
by the class to shareholders as capital gain distributions and changes in
the class' share price. Both returns assume the dividends or capital gains
paid by the class are reinvested, if any, and exclude the effect of sales
charges.
DIVIDENDS AND YIELD
PERIODS ENDED JULY 31, 1997    PAST 1        LIFE OF        
                               MONTH         CLASS          
 
Dividends per share            4.86(cents)   23.81(cents)   
 
Annualized dividend rate       5.21%         5.31%          
 
30-day annualized yield        n/a           -              
 
DIVIDENDS per share show the income paid by the class for a set period. If
you annualize this number, based on an average share price of $10.99 over
the past one month,  and $10.84 over the life of the class, you can compare
the class' income over these two periods. The 30-day annualized YIELD is a
standard formula for all funds based on the yields of the bonds in the
fund, averaged over the past 30 days. This figure shows you the yield
characteristics of the fund's investments at the end of the period. It also
helps you compare funds from different companies on an equal basis. Yield
information will be reported once Class B has a longer, more stable
operating history.
FUND TALK: THE MANAGER'S OVERVIEW
 
 
 
MARKET RECAP
A favorable inflation backdrop 
steadied fears of higher interest 
rates, buoying the U.S. taxable 
bond market for the 12 months that 
ended July 31, 1997. The Lehman 
Brothers Aggregate Bond Index - 
a broad measure of the U.S. 
taxable bond market - returned 
10.76% over the period. For the 
first eight months of the period, 
bonds suffered from increasing 
expectations of economic growth 
and inflation. In his February 
testimony before Congress, 
Federal Reserve Board Chairman 
Alan Greenspan indicated that the 
Fed was inclined to raise the rate 
banks charge each other for 
overnight loans - known as the 
fed funds target rate - to head off 
inflation that might be caused by a 
tight labor market. On March 25, 
the Fed followed through by 
raising the target rate by 0.25% to 
5.50%. However, this move largely 
had been priced into the market. 
Weakening economic and inflation 
signals - combined with the Fed's 
shift to a more favorable stance 
indicating no intention to raise 
rates in the short term - helped 
spark a rally in all debt markets 
from April through the end of the 
period. Relative interest-rate 
stability provided a positive setting 
for mortgage-backed securities. 
For the 12 months that ended July 
31, 1997, the Salomon Brothers 
Mortgage Index returned 10.60%. 
Sustained economic growth and 
demand from yield-hungry 
investors helped corporate bonds, 
with the Lehman Brothers 
Corporate Bond Index returning 
12.55% over the same period.
NOTE TO SHAREHOLDERS: The following is an interview with Thomas Silvia, who
co-manages Fidelity Advisor Mortgage Securities Fund with Kevin Grant. On
October 1, 1997, Silvia will become the sole Portfolio Manager of the fund.
Q. HOW DID THE FUND PERFORM, TOM?
A. For the 12 months that ended July 31, 1997, the fund's Class A, Class T
and Class B shares returned 10.25%, 10.20% and 9.81%, respectively. During
the same period, the U.S. mortgage funds average, according to Lipper
Analytical Services, returned 10.05% and the Salomon Brothers Mortgage
Index returned 10.60%. 
Q. WHAT HELPED THE FUND'S 
PERFORMANCE DURING THE PERIOD?
A. We continued to get good performance from our small position in
commercial mortgage-backed securities - bonds issued and backed by office
buildings, shopping malls and multi-housing structures. These investments
produced stronger returns than were generated by the overall mortgage
market. In addition, the fund was overweighted relative to the index in
30-year Fannie Mae (Federal National Mortgage Association) discount bonds,
which are priced below par, and current-coupon bonds, which are mortgage
securities that pay a similar coupon - or periodic interest payment - as
those being created at the current market rate. These securities
outperformed comparable 30-year Ginnie Mae (Government National Mortgage
Association) bonds and 15-year mortgage-backed securities during the
period.
Q. WHAT FACTORS IN THE MORTGAGE MARKET AFFECTED THE FUND'S PERFORMANCE?
A. The mortgage market benefited greatly from a period of relatively stable
interest rates. For example, the yield on a 10-year Treasury has lingered
in a range of 6% to 7% for about 18 months - a small fluctuation compared
to the range we've seen over the past 10 years. A calm interest-rate
environment reduces the largest source of risk for mortgage securities -
prepayments. For instance, when interest rates decline, mortgage holders
are likely to refinance their debt at a lower rate. This hurts mortgage
investors because they are forced to reinvest at a lower interest rate. On
the other hand, when interest rates are steady, the risk of prepayments
declines. This has been the case for the past 12 months and, as a result,
the mortgage sector was one of the best-performing categories of the bond
market. 
Q. WHICH AREAS OF THE MORTGAGE MARKET DID YOU TARGET?
A. We retained a small position in commercial mortgage-backed securities,
which was more of a selective investment in a few particular bonds than an
overall sector allocation. The fund also maintained a slightly
underweighted position relative to the index in balloon mortgages. Overall,
the strong performance of the mortgage market during the period reduced the
number of attractive investment opportunities. The reward for taking on
risk was low, so it was a time to hold more liquid securities and keep the
fund's portfolio relatively close to the allocations in the fund's
benchmark index - the Salomon Brothers Mortgage Index.
Q. DID THE FUND'S RELATIVELY SMALL POSITION IN BALLOON MORTGAGES HELP THE
FUND?
A. Balloons are mortgages that are constructed with a typical 30-year
amortization schedule, but differ from the standard mortgage in that the
homeowner agrees to pay the outstanding balance on a specified - or balloon
- - date, usually within five or seven years of issuance. The stable
interest-rate environment benefited the 30-year sector the most, the
15-year sector the second most, and the balloon sector the least.
Consequently, the fund benefited from not having a significant position in
balloons during the period.
Q. WERE THERE ANY DISAPPOINTMENTS DURING THE PERIOD?
A. I think the reduced number of attractive investment alternatives in the
mortgage market was the biggest disappointment. The fund has typically done
its best when the market goes through a dramatic change. That's because our
value-driven, bottom-up security selection process allows us to capitalize
on larger and more frequent misvaluations in the mortgage market. When
everything is trading in so tight a range, there aren't many changes in
values or prepayment options to affect the cash flows of bonds. Therefore,
in a relatively stable environment, we are not able to take advantage of
our research and trading skills to the same degree.
Q. WHAT'S YOUR OUTLOOK FOR THE MORTGAGE MARKET?
A. At the end of the period, we hit a 6% yield on the 10-year Treasury,
which leaves the mortgage market on a cliff. If yields drop below 6%, it
will be an attractive environment for homeowners to refinance and prepay
their mortgages. This likely would cause the mortgage sector to
underperform other types of bonds. On the other hand, if interest rates
remain stable, the mortgage market should continue to perform well.
THE VIEWS EXPRESSED IN THIS REPORT REFLECT THOSE OF THE PORTFOLIO MANAGER
ONLY THROUGH THE END OF THE PERIOD OF THE REPORT AS STATED ON THE COVER.
THE MANAGER'S VIEWS ARE SUBJECT TO CHANGE AT ANY TIME BASED ON MARKET AND
OTHER CONDITIONS.
 
FUND FACTS
GOAL: high current income 
by investing in mortgage 
securities of all kinds
START DATE: December 31, 
1984
SIZE: as of July 31, 1997, 
more than $533 million
MANAGER: Thomas Silvia, 
co-managed since February 
1997; joined Fidelity in 1993
(checkmark)
THOMAS SILVIA ON HIS 
INVESTMENT STRATEGY: 
"The fund's overall market risk 
will be targeted to its 
benchmark, the Salomon 
Brothers Mortgage Index. I 
look to add incremental return 
by the use of a value-driven, 
bottom-up approach to finding 
individual mortgage-backed 
securities that offer higher 
expected returns or 
potentially better price 
performance than securities 
in the benchmark. This 
approach takes advantage of 
the skills offered by our 
quantitative research group, 
as well as our trading desk. In 
addition, I will continue to look 
for opportunities outside of 
the fund's benchmark, such 
as commercial 
mortgage-backed securities."
INVESTMENT CHANGES
 
 
COUPON DISTRIBUTION AS OF JULY 31, 1997
                % OF FUND'S    % OF FUND'S INVESTMENTS   
                INVESTMENTS    6 MONTHS AGO              
 
 Less than 5%    0.1            0.1                      
 
 5 -  5.99%      4.7            6.2                      
 
 6 -  6.99%      25.7           29.3                     
 
 7 -  7.99%      27.0           30.7                     
 
 8 -  8.99%      20.2           12.2                     
 
 9 -  9.99%      6.6            4.0                      
 
10 - 10.99%      3.5            4.4                      
 
11% and over     2.3            3.0                      
 
COUPON DISTRIBUTION SHOWS THE RANGE OF STATED INTEREST RATES ON THE FUND'S
INVESTMENTS, EXCLUDING REPURCHASE AGREEMENTS.
AVERAGE YEARS TO MATURITY AS OF JULY 31, 1997
               6 MONTHS AGO   
 
Years    5.8    6.3           
 
AVERAGE YEARS TO MATURITY IS BASED ON THE AVERAGE TIME UNTIL PRINCIPAL
PAYMENTS ARE EXPECTED FROM EACH OF THE FUND'S BONDS, WEIGHTED BY DOLLAR
AMOUNT.
DURATION AS OF JULY 31, 1997
               6 MONTHS AGO    
 
Years    3.2    4.0            
 
DURATION SHOWS HOW MUCH A BOND FUND'S PRICE FLUCTUATES WITH CHANGES IN
COMPARABLE INTEREST RATES. IF RATES RISE 1%, FOR EXAMPLE, A FUND WITH A
FIVE-YEAR DURATION IS LIKELY TO LOSE ABOUT 5% OF ITS VALUE. OTHER FACTORS
ALSO CAN INFLUENCE A BOND FUND'S PERFORMANCE AND SHARE PRICE. ACCORDINGLY,
A BOND FUND'S ACTUAL PERFORMANCE MAY DIFFER FROM THIS EXAMPLE.
ASSET ALLOCATION (% OF FUND'S INVESTMENTS)
AS OF JULY 31, 1997 AS OF JANUARY 31, 1997 
Row: 1, Col: 1, Value: 9.800000000000001
Row: 1, Col: 2, Value: 2.9
Row: 1, Col: 3, Value: 87.3
Mortgage-backed
securities 87.6%
CMOs and
other mortgage
related securities 2.3%
Short-term
investments 10.1%
Mortgage-backed
securities 87.3%
CMOs and 
other mortgage
related securities 2.8%
Short-term
investments 9.9%
Row: 1, Col: 1, Value: 10.1
Row: 1, Col: 2, Value: 2.3
Row: 1, Col: 3, Value: 87.59999999999999
 
INVESTMENTS JULY 31, 1997 
 
Showing Percentage of Total Value of Investment in Securities
 
 
U.S. GOVERNMENT AGENCY - MORTGAGE-BACKED SECURITIES - 87.3%
  PRINCIPAL VALUE
  AMOUNT (NOTE 1)
FEDERAL HOME LOAN MORTGAGE CORPORATION - 15.7%
5%, 7/1/10  $ 4,019,563 $ 3,795,975
6 1/2%, 1/1/24 to 7/1/24  4,480,017  4,411,427
7%, 5/1/99 to 8/1/12  16,562,905  16,757,226
7 1/2%, 10/1/11 to 7/1/12  35,640,019  36,482,404
7 1/2%, 8/1/27 (e)  3,500,000  3,561,250
8%, 10/1/07 to 12/1/18  767,774  794,814
8 1/2%, 11/1/03 to 1/1/20  2,437,117  2,554,427
9%, 9/1/08 to 5/1/21  11,954,777  12,802,489
10%, 1/1/09 to 5/1/19  2,502,185  2,726,412
10 1/2%, 8/1/10 to 12/1/20  2,723,982  3,011,806
11 1/2%, 4/1/12  111,151  124,061
11 3/4%, 6/1/11  69,701  78,657
12 1/4%, 6/1/14 to 7/1/15  314,042  360,277
12 1/2%, 5/1/12 to 4/1/15  1,236,677  1,428,593
12 3/4%, 6/1/05 to 3/1/15  204,003  229,242
13%, 1/1/11 to 6/1/15  1,855,544  2,187,117
  91,306,177
 
FEDERAL NATIONAL MORTGAGE ASSOCIATION - 40.1%
5 1/2%, 11/1/08 to 5/1/26  24,273,187  23,420,456
6%, 4/1/00 to 5/1/26  87,078,670  84,355,052
6 1/2%, 9/1/10 to 4/1/26  56,791,751  55,821,852
7%, 2/1/24 to 5/1/27  31,698,840  31,684,095
7 1/2%, 3/1/22 to 12/1/22  3,449,394  3,527,311
8%, 1/1/07 to 8/1/27 (e)  15,806,073  16,257,924
8 1/4%, 1/1/13  132,558  137,062
8 1/2%, 11/1/03 to 11/1/18  2,059,489  2,137,174
8 3/4%, 11/1/08 to 7/1/09  296,023  307,877
9%, 1/1/08 to 2/1/13  1,034,999  1,084,078
9 1/2%, 5/1/07 to 8/1/22  8,581,420  9,131,717
11%, 12/1/02 to 8/1/10  2,741,172  3,009,758
12 1/4%, 5/1/13 to 6/1/15  542,105  616,601
12 1/2%, 10/1/13 to 3/1/16  724,646  839,914
12 3/4%, 6/1/13 to 7/1/15  379,431  436,032
13 1/2%, 9/1/13 to 12/1/14  192,548  229,229
14%, 5/1/12 to 11/1/14  64,062  76,803
  233,072,935
 
U.S. GOVERNMENT AGENCY - MORTGAGE-BACKED SECURITIES - CONTINUED
  PRINCIPAL VALUE
  AMOUNT (NOTE 1)
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION - 31.5%
7%, 10/15/22 to 11/15/23 $ 3,665,261 $ 3,683,818
7 1/2%, 7/15/05 to 2/15/27  57,751,910  58,851,736
8%, 4/15/02 to 7/15/27  31,473,025  32,528,616
8 1/2%, 7/15/16 to 8/15/27  54,893,289  57,361,674
9%, 10/15/04 to 4/15/18  6,255,677  6,703,581
9 1/2%, 6/15/09 to 7/15/22  5,351,496  5,776,000
10%, 12/15/17 to 1/15/26  11,883,595  13,152,300
10 1/2%, 11/15/97 to 2/15/18  1,488,065  1,634,033
11%, 1/15/10 to 8/15/17  3,092,191  3,529,873
11 1/2%, 10/15/10 to 7/15/18   98,587  112,208
13%, 10/15/13  104,463  123,952
13 1/2%, 7/15/11 to 10/15/14  97,226  116,364
  183,574,155
TOTAL U.S. GOVERNMENT AGENCY - 
MORTGAGE-BACKED SECURITIES
(Cost $498,582,159)   507,953,267
COLLATERALIZED MORTGAGE OBLIGATIONS - 0.0%
U.S. GOVERNMENT AGENCY - 0.0%
Federal Home Loan Mortgage Corporation 
sequential pay Series 1353 Class A, 
5 1/2%, 11/15/04 (Cost $122,226)  131,183  130,404
COMMERCIAL MORTGAGE SECURITIES - 2.7%
Merrill Lynch Mortgage Investors, Inc. Series 1994-M1 
Class A, 8.1239%, 6/25/22 (d)  5,285,305  5,334,029
Structured Asset Securities Corp. commercial Series 1992-M1
Class C, 7.05%, 11/25/02  3,192,522  2,906,006
SASCO 1997-N1 LLC Series 1997-N1 Class C, 
6.055%, 9/25/28 (b)  5,000,000  5,000,000
SML, Inc. commercial Series 1994-C1
Class C, 9.20%, 9/18/99 (a)  3,280,000  2,693,700
TOTAL COMMERCIAL MORTGAGE SECURITIES
(Cost $14,720,222)   15,933,735
COMPLEX MORTGAGE SECURITIES - 0.1%
  PRINCIPAL VALUE
  AMOUNT (NOTE 1)
INTEREST ONLY STRIPS - 0.1%
SML, Inc. commercial Series 1994-C1 
Class S, 0.81% 9/18/99 (c) (Cost $749,264) $ 51,554,000 $ 612,204
CASH EQUIVALENTS - 9.9%
 MATURITY 
 AMOUNT 
Investments in repurchase agreements 
(U.S. Treasury obligations) in a joint 
trading account at 5.77%, dated 
7/31/97 due 8/1/97 $ 57,639,237  57,630,000
TOTAL INVESTMENT IN SECURITIES - 100%
(Cost $571,803,871)  $ 582,259,610
LEGEND
1. Restricted securities - Investment in securities not registered under
the Securities Act of 1933 (see Note 2 of Notes to Financial Statements). 
Additional information on each holding is as follows:
 ACQUISITION ACQUISITION
SECURITY DATE COST
SML, Inc. 
commercial Series
1994-C1 Class C,
9.20%, 9/18/99  8/11/94  $2,132,820
2. Security exempt from registration under Rule 144A of the Securities Act
of 1933. These securities may be resold in transactions exempt from
registration, normally to qualified institutional buyers. At the period
end, the value of these securities amounted to $5,000,000 or 0.9% of net
assets.
3. Security represents right to receive monthly interest payments on an
underlying pool of mortgages. Principal shown is the par amount of the
mortgage pool.
4. The coupon rate shown on floating or adjustable rate securities
represents the rate at period end.
5. Security purchased on delayed delivery basis (See Note 2 of Notes to
Financial Statements).
INCOME TAX INFORMATION
At July 31, 1997, the aggregate cost of investment securities for income
tax purposes was $571,956,866. Net unrealized appreciation aggregated
$10,302,744, of which $11,091,982 related to appreciated investment
securities and $789,238 related to depreciated investment securities. 
The fund hereby designates approximately $544,000 as a capital gain
dividend for the purpose of the dividend paid deduction.
FINANCIAL STATEMENTS
 
 
STATEMENT OF ASSETS AND LIABILITIES
 
<TABLE>
<CAPTION>
<S>                                                         <C>            <C>             
 JULY 31, 1997                                                                             
 
ASSETS                                                                                     
 
Investment in securities, at value (including repurchase                   $ 582,259,610   
agreements of $57,630,000) (cost $571,803,871) -                                           
See accompanying schedule                                                                  
 
Cash                                                                        115            
 
Receivable for investments sold                                             251,870        
 
Interest receivable                                                         3,066,107      
 
Prepaid expenses                                                            44,595         
 
 TOTAL ASSETS                                                               585,622,297    
 
LIABILITIES                                                                                
 
Payable for investments purchased                           $ 30,194,142                   
Regular Delivery                                                                           
 
 Delayed Delivery                                            19,626,894                    
 
Payable for fund shares redeemed                             1,026,148                     
 
Distributions payable                                        515,582                       
 
Accrued management fee                                       187,169                       
 
Distribution fees payable                                    3,034                         
 
Other payables and accrued expenses                          177,203                       
 
 TOTAL LIABILITIES                                                          51,730,172     
 
NET ASSETS                                                                 $ 533,892,125   
 
Net Assets consist of:                                                                     
 
Paid in capital                                                            $ 519,208,290   
 
Undistributed net investment income                                         230,506        
 
Accumulated undistributed net realized gain (loss)                          3,997,590      
on investments                                                                             
 
Net unrealized appreciation (depreciation) on                               10,455,739     
investments                                                                                
 
NET ASSETS                                                                 $ 533,892,125   
 
</TABLE>
 
STATEMENT OF ASSETS AND LIABILITIES - CONTINUED
 JULY 31, 1997                                                              
 
CALCULATION OF MAXIMUM OFFERING PRICE                              $11.05   
CLASS A:                                                                    
NET ASSET VALUE and redemption price per share                              
 ($1,585,920 (divided by) 143,564 shares)                                   
 
Maximum offering price per share (100/95.75 of $11.05)             $11.54   
 
CLASS T:                                                           $11.05   
NET ASSET VALUE and redemption price per share                              
 ($12,192,905 (divided by) 1,103,680 shares)                                
 
Maximum offering price per share (100/96.50 of $11.05)             $11.45   
 
CLASS B:                                                           $11.04   
NET ASSET VALUE and offering price per share                                
 ($823,411 (divided by) 74,578 shares) A                                    
 
INITIAL CLASS:                                                     $11.05   
NET ASSET VALUE, offering price and redemption price                        
 per share ($506,112,493 (divided by) 45,796,695 shares)                    
 
INSTITUTIONAL CLASS:                                               $11.04   
NET ASSET VALUE, offering price and redemption price                        
 per share ($13,177,396 (divided by) 1,193,472 shares)                      
 
A REDEMPTION PRICE PER SHARE IS EQUAL TO NET ASSET VALUE LESS ANY
APPLICABLE CONTINGENT DEFERRED SALES CHARGE.
STATEMENT OF OPERATIONS
 
<TABLE>
<CAPTION>
<S>                                                        <C>           <C>            
 YEAR ENDED JULY 31, 1997                                                               
 
INVESTMENT INCOME                                                        $ 35,932,141   
Interest                                                                                
 
EXPENSES                                                                                
 
Management fee                                             $ 2,273,788                  
 
Transfer agent fees                                         1,034,760                   
 
Distribution fees                                           4,506                       
 
Accounting fees and expenses                                208,321                     
 
Non-interested trustees' compensation                       9,585                       
 
Custodian fees and expenses                                 79,667                      
 
Registration fees                                           75,411                      
 
Audit                                                       83,730                      
 
Legal                                                       17,684                      
 
Miscellaneous                                               4,396                       
 
 Total expenses before reductions                           3,791,848                   
 
 Expense reductions                                         (52,945)      3,738,903     
 
NET INVESTMENT INCOME                                                     32,193,238    
 
REALIZED AND UNREALIZED GAIN (LOSS)                                       4,296,274     
Net realized gain (loss) on investment securities                                       
 
Change in net unrealized appreciation (depreciation) on                   14,164,021    
investment securities                                                                   
 
NET GAIN (LOSS)                                                           18,460,295    
 
NET INCREASE (DECREASE) IN NET ASSETS RESULTING                          $ 50,653,533   
FROM OPERATIONS                                                                         
 
</TABLE>
 
STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
<S>                                                       <C>             <C>             
                                                          YEAR ENDED      YEAR ENDED      
                                                          JULY 31,        JULY 31,        
                                                          1997            1996            
 
INCREASE (DECREASE) IN NET ASSETS                                                         
 
Operations                                                $ 32,193,238    $ 31,763,051    
Net investment income                                                                     
 
 Net realized gain (loss)                                  4,296,274       8,694,701      
 
 Change in net unrealized appreciation (depreciation)      14,164,021      (11,251,245)   
 
 NET INCREASE (DECREASE) IN NET ASSETS RESULTING           50,653,533      29,206,507     
FROM OPERATIONS                                                                           
 
Distributions to shareholders                              (32,649,725)    (31,178,449)   
From net investment income                                                                
 
 From net realized gain                                    (5,039,533)     (4,055,960)    
 
 TOTAL DISTRIBUTIONS                                       (37,689,258)    (35,234,409)   
 
Share transactions - net increase (decrease)               32,765,543      77,949,164     
 
  TOTAL INCREASE (DECREASE) IN NET ASSETS                  45,729,818      71,921,262     
 
NET ASSETS                                                                                
 
 Beginning of period                                       488,162,307     416,241,045    
 
 End of period (including undistributed net investment    $ 533,892,125   $ 488,162,307   
income of $230,506 and $922,675, respectively)                                            
 
</TABLE>
 
FINANCIAL HIGHLIGHTS - CLASS A
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                            
 
Net asset value, beginning of period                    $ 10.830   
 
Income from Investment Operations                                  
 
 Net investment income                                   .268 F    
 
 Net realized and unrealized gain (loss)                 .224      
 
 Total from investment operations                        .492      
 
Less Distributions                                                 
 
 From net investment income                              (.272)    
 
Net asset value, end of period                          $ 11.050   
 
TOTAL RETURN B, C                                        4.61%     
 
RATIOS AND SUPPLEMENTAL DATA                                       
 
Net assets, end of period (000 omitted)                 $ 1,586    
 
Ratio of expenses to average net assets                  .90% A,   
                                                         D         
 
Ratio of net investment income to average net assets     6.09% A   
 
Portfolio turnover rate                                  149%      
 
A ANNUALIZED
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
C TOTAL RETURNS DO NOT INCLUDE THE ONE TIME SALES CHARGE AND FOR PERIODS OF
LESS THAN ONE YEAR ARE NOT ANNUALIZED.
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF CLASS A SHARES) TO
JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - CLASS T
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                             
 
Net asset value, beginning of period                    $ 10.830    
 
Income from Investment Operations                                   
 
 Net investment income                                   .255 F     
 
 Net realized and unrealized gain (loss)                 .233       
 
 Total from investment operations                        .488       
 
Less Distributions                                                  
 
 From net investment income                              (.268)     
 
Net asset value, end of period                          $ 11.050    
 
TOTAL RETURN B, C                                        4.57%      
 
RATIOS AND SUPPLEMENTAL DATA                                        
 
Net assets, end of period (000 omitted)                 $ 12,193    
 
Ratio of expenses to average net assets                  1.00% A,   
                                                         D          
 
Ratio of net investment income to average net assets     5.99% A    
 
Portfolio turnover rate                                  149%       
 
A ANNUALIZED
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
C TOTAL RETURNS DO NOT INCLUDE THE ONE TIME SALES CHARGE AND FOR PERIODS OF
LESS THAN ONE YEAR ARE NOT ANNUALIZED.
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF CLASS T SHARES) TO
JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - CLASS B
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                             
 
Net asset value, beginning of period                    $ 10.830    
 
Income from Investment Operations                                   
 
 Net investment income                                   .234 F     
 
 Net realized and unrealized gain (loss)                 .214       
 
 Total from investment operations                        .448       
 
Less Distributions                                                  
 
 From net investment income                              (.238)     
 
Net asset value, end of period                          $ 11.040    
 
TOTAL RETURN B, C                                        4.20%      
 
RATIOS AND SUPPLEMENTAL DATA                                        
 
Net assets, end of period (000 omitted)                 $ 823       
 
Ratio of expenses to average net assets                  1.65% A,   
                                                         D          
 
Ratio of net investment income to average net assets     5.34% A    
 
Portfolio turnover rate                                  149%       
 
A ANNUALIZED
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
C TOTAL RETURNS DO NOT INCLUDE THE CONTINGENT DEFERRED SALES CHARGE AND FOR
PERIODS OF LESS THAN ONE YEAR ARE NOT ANNUALIZED.
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF CLASS B SHARES) TO
JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - INITIAL CLASS
 
<TABLE>
<CAPTION>
<S>                               <C>                    <C>         <C>         <C>         <C>         
                                  YEARS ENDED JULY 31,                                                   
 
                                  1997                   1996        1995        1994 C      1993        
 
SELECTED PER-SHARE DATA                                                                                  
 
Net asset value, beginning        $ 10.780               $ 10.890    $ 10.580    $ 10.910    $ 10.830    
of period                                                                                                
 
Income from Investment                                                                                   
Operations                                                                                               
 
 Net investment income             .678 D                 .729        .772        .570        .788       
 
 Net realized and                  .391                   (.015)      .325        (.242)      (.007)     
 unrealized gain (loss)                                                                                  
 
 Total from investment             1.069                  .714        1.097       .328        .781       
 operations                                                                                              
 
Less Distributions                                                                                       
 
 From net investment income        (.689)                 (.724)      (.737)      (.588)      (.701)     
 
 From net realized gain            (.110)                 (.100)      -           (.040)      -          
 
 In excess of net realized         -                      -           (.050)      (.030)      -          
gain                                                                                                     
 
 Total distributions               (.799)                 (.824)      (.787)      (.658)      (.701)     
 
Net asset value, end of period    $ 11.050               $ 10.780    $ 10.890    $ 10.580    $ 10.910    
 
TOTAL RETURN B                     10.34%                 6.72%       10.88%      3.13%       7.47%      
 
RATIOS AND SUPPLEMENTAL                                                                                  
DATA                                                                                                     
 
Net assets, end of period         $ 506,113              $ 488,162   $ 416,241   $ 365,801   $ 419,467   
(000 omitted)                                                                                            
 
Ratio of expenses to average       .73%                   .74%        .77%        .79%        .76%       
net assets                                                                                               
 
Ratio of expenses to average       .73%                   .73%        .77%        .79%        .76%       
net assets after expense                                 A                                               
reductions                                                                                               
 
Ratio of net investment income     6.26%                  6.75%       7.37%       6.73%       7.18%      
                                                                                                         
to average net assets                                                                                    
 
Portfolio turnover rate            149%                   221%        329%        563%        278%       
 
</TABLE>
 
A FMR OR THE FUND HAS ENTERED INTO VARYING ARRANGEMENTS WITH THIRD PARTIES
WHO EITHER PAID OR REDUCED A PORTION OF THE CLASS' EXPENSES.
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN.
C EFFECTIVE AUGUST 1, 1993, THE FUND ADOPTED STATEMENT OF POSITION 93-2,
"DETERMINATION, DISCLOSURE, AND FINANCIAL STATEMENT PRESENTATION OF INCOME,
CAPITAL GAIN, AND RETURN OF CAPITAL DISTRIBUTIONS BY INVESTMENT COMPANIES."
AS A RESULT, NET INVESTMENT INCOME PER SHARE MAY REFLECT CERTAIN
RECLASSIFICATIONS RELATED TO BOOK TO TAX DIFFERENCES.
D NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - INSTITUTIONAL CLASS
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                                        
 
Net asset value, beginning of period                                $ 10.830   
 
Income from Investment Operations                                              
 
 Net investment income                                               .263 F    
 
 Net realized and unrealized gain (loss)                             .226      
 
 Total from investment operations                                    .489      
 
Less Distributions                                                             
 
 From net interest income                                            (.279)    
 
Net asset value, end of period                                      $ 11.040   
 
TOTAL RETURN B, C                                                    4.59%     
 
RATIOS AND SUPPLEMENTAL DATA                                                   
 
Net assets, end of period (000 omitted)                             $ 13,177   
 
Ratio of expenses to average net assets                              .75% A,   
                                                                     D         
 
Ratio of expenses to average net assets after expense reductions     .70% A,   
                                                                     G         
 
Ratio of net investment income to average net assets                 6.29% A   
 
Portfolio turnover rate                                              149%      
 
A ANNUALIZED
B TOTAL RETURNS FOR PERIODS OF LESS THAN ONE YEAR ARE NOT ANNUALIZED.
C THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF INSTITUTIONAL CLASS
SHARES) TO JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
G FMR OR THE FUND HAS ENTERED INTO VARYING ARRANGEMENTS WITH THIRD PARTIES
WHO EITHER PAID OR REDUCED A PORTION OF THE CLASS' EXPENSES (SEE NOTE 5 OF
NOTES TO FINANCIAL STATEMENTS).
NOTES TO FINANCIAL STATEMENTS
For the period ended July 31, 1997
 
   
 
 
1. SIGNIFICANT ACCOUNTING POLICIES.
Fidelity Advisor Mortgage Securities Fund (the fund) is a fund of Fidelity
Income Fund (the trust) and is authorized to issue an unlimited number of
shares. The trust is registered under the Investment Company Act of 1940,
as amended (the 1940 Act), as an open-end management investment company
organized as a Massachusetts business trust. On March 14, 1996, the Board
of Trustees approved the transfer of the fund to the Fidelity Advisor
product line. The Board of Trustees also approved the creation of Class A,
Class T, Class B and Institutional Class shares. Offering of new classes
commenced on March 3, 1997. Prior to March 3, 1997, the fund offered one
class of shares, Fidelity Mortgage Securities Fund ("Initial Class")
(formerly Fidelity Mortgage Securities Fund).
The financial statements have been prepared in conformity with generally
accepted accounting principles which permit management to make certain
estimates and assumptions at the date of the financial statements. The
following summarizes the significant accounting policies of the fund:
SECURITY VALUATION. Securities are valued based upon a computerized matrix
system and/or appraisals by a pricing service, both of which consider
market transactions and dealer-supplied valuations. Securities (including
restricted securities)for which market quotations are not readily available
are valued at their fair value as determined in good faith under
consistently applied procedures under the general supervision of the Board
of Trustees. Short-term securities with remaining maturities of sixty days
or less for which quotations are not readily available are valued at
amortized cost or original cost plus accrued interest, both of which
approximate current value.
INCOME TAXES. As a qualified regulated investment company under Subchapter
M of the Internal Revenue Code, the fund is not subject to income taxes to
the extent that it distributes substantially all of its taxable income for
its fiscal year. The schedule of investments includes information regarding
income taxes under the caption "Income Tax Information."
INVESTMENT INCOME. Interest income, which includes accretion of original
issue discount, is accrued as earned.
EXPENSES. Most expenses of the trust can be directly attributed to a fund.
Expenses which cannot be directly attributed are apportioned between the
funds in the trust.
PREPAID EXPENSES. Fidelity Management & Research Company (FMR) bears all
organizational expenses except for registering and qualifying Class A,
Class T, Class B, and Institutional Class and shares of those classes for
distribution under federal and state securities law. These expenses are
borne by those classes and amortized over one year.
1. SIGNIFICANT ACCOUNTING POLICIES - CONTINUED
DISTRIBUTIONS TO SHAREHOLDERS. Distributions are declared daily and paid
monthly from net investment income. Distributions from realized gains, if
any, are recorded on the ex-dividend date. Income dividends and capital
gain distributions are declared separately for each class.
Income and capital gain distributions are determined in accordance with
income tax regulations which may differ from generally accepted accounting
principles. These differences, which may result in distribution
reclassifications, are primarily due to differing treatments for paydown
gains/losses on certain securities and losses deferred due to wash sales.
The fund also utilized earnings and profits distributed to shareholders on
redemption of shares as a part of the dividends paid deduction for income
tax purposes.
Permanent book and tax basis differences relating to shareholder
distributions will result in reclassifications to paid in capital.
Undistributed net investment income and accumulated undistributed net
realized gain (loss) on investments may include temporary book and tax
basis differences which will reverse in a subsequent period. Any taxable
income or gain remaining at fiscal year end is distributed in the following
year.
SECURITY TRANSACTIONS. Security transactions are accounted for as of trade
date. Gains and losses on securities sold are determined on the basis of
identified cost.
2. OPERATING POLICIES.
JOINT TRADING ACCOUNT. Pursuant to an Exemptive Order issued by the
Securities and Exchange Commission, the fund, along with other affiliated
entities of FMR, may transfer uninvested cash balances into one or more
joint trading accounts. These balances are invested in one or more
repurchase agreements for U.S. Treasury or Federal Agency obligations.
REPURCHASE AGREEMENTS. The underlying U.S. Treasury or Federal Agency
securities are transferred to an account of the fund, or to the Joint
Trading Account, at a bank custodian. The securities are marked-to-market
daily and maintained at a value at least equal to the principal amount of
the repurchase agreement (including accrued interest). FMR, the fund's
investment adviser, is responsible for determining that the value of the
underlying securities remains in accordance with the market value
requirements stated above. 
DELAYED DELIVERY TRANSACTIONS. The fund may purchase or sell securities on
a delayed delivery basis. Payment and delivery may take place a month or
more after the date of the transaction. The price of the underlying
securities and the date when the securities will be delivered and paid for
are fixed at the time the transaction is negotiated. The market values of
the securities purchased or sold on a delayed delivery basis are identified
as such in the fund's schedule of investments. The fund may receive
compensation for
2. OPERATING POLICIES - CONTINUED
DELAYED DELIVERY TRANSACTIONS - CONTINUED
interest forgone in the purchase of a delayed delivery security. With
respect to purchase commitments, the fund identifies securities as
segregated in its custodial records with a value at least equal to the
amount of the commitment. Losses may arise due to changes in the market
value of the underlying securities or if the counterparty does not perform
under the contract. 
RESTRICTED SECURITIES. The fund is permitted to invest in securities that
are subject to legal or contractual restrictions on resale. These
securities generally may be resold in transactions exempt from registration
or to the public if the securities are registered. Disposal of these
securities may involve time-consuming negotiations and expense, and prompt
sale at an acceptable price may be difficult. At the end of the period,
restricted securities (excluding 144A issues) amounted to $2,693,700 or
0.5% of net assets.
3. PURCHASES AND SALES OF INVESTMENTS. 
Purchases and sales of securities, other than short-term securities,
aggregated $790,852,390 and $747,620,591, respectively, of which U.S.
government and government agency obligations aggregated $780,486,825 and
$743,935,902 respectively.
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES. 
MANAGEMENT FEE. As the fund's investment adviser, FMR receives a monthly
fee that is calculated on the basis of a group fee rate plus a fixed
individual fund fee rate applied to the average net assets of the fund. The
group fee rate is the weighted average of a series of rates and is based on
the monthly average net assets of all the mutual funds advised by FMR. The
rates ranged from .1100% to .3700% for the period. The annual individual
fund fee rate is .30%. In the event that these rates were lower than the
contractual rates in effect during the period, FMR voluntarily implemented
the above rates, as they resulted in the same or a lower management fee.
For the period, the management fee was equivalent to an annual rate of .44%
of average net assets.
DISTRIBUTION AND SERVICE PLAN. In accordance with Rule 12b-1 of the 1940
Act, the Trustees have adopted separate distribution plans with respect to
each class of shares (collectively referred to as "the Plans"). Under
certain of the Plans, the class pays Fidelity Distributors Corporation
(FDC), an affiliate of FMR, a distribution and service fee. This fee is
based on the following annual rates of the average net assets of each
applicable class:
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES - CONTINUED
DISTRIBUTION AND SERVICE PLAN - CONTINUED
CLASS A     .15%     
 
CLASS T     .25%     
 
CLASS B     .90% *   
 
* .65% REPRESENTS A DISTRIBUTION FEE AND .25% REPRESENTS A SHAREHOLDER
SERVICE FEE.
For the period, each class paid FDC the following amounts, a portion of
which was paid to securities dealers, banks and other financial
institutions for the distribution of each class' applicable shares, and
providing shareholder support services:
           PAID TO   DEALERS'   
           FDC       PORTION    
 
CLASS A    $ 530     $ 530      
 
CLASS T     2,602     2,602     
 
CLASS B     1,374     1,374     
 
           $ 4,506   $ 4,506    
 
Under the Plans, FMR or FDC may use its resources to pay administrative and
promotional expenses related to the sale of each class' shares. The Plans
also authorize payments to third parties that assist in the sale of each
class' shares or render shareholder support services. 
SALES LOAD. FDC receives a front-end sales charge of up to 4.25% and 3.50%
for selling Class A and Class T shares of the fund, respectively, and the
proceeds of a contingent deferred sales charge levied on Class B share
redemptions occurring within six years of purchase. The Class B charge is
based on declining rates which range from 5% to 1% of the lesser of the
cost of shares at the initial date of purchase or the net asset value of
the redeemed shares, excluding any reinvested dividends and capital gains.
Effective August 1, 1997, Class A's maximum sales charge was increased to
4.75%. 
For the period, FDC received the following sales charge amounts related to
each class, a portion of which is paid to securities, dealers, banks, and
other financial institutions:
           PAID TO    DEALERS'   
           FDC        PORTION    
 
CLASS A    $ 7,090    $ 7,023    
 
CLASS T     9,662      7,492     
 
CLASS B     0          0 *       
 
           $ 16,752   $ 14,515   
 
* WHEN CLASS B SHARES ARE INITIALLY SOLD, FDC PAYS COMMISSIONS FROM ITS OWN
RESOURCES TO DEALERS THROUGH WHICH THE SALES ARE MADE.
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES - CONTINUED
TRANSFER AGENT FEES. Each class of the fund has entered into a separate
transfer, dividend disbursing, and shareholder servicing agent
(collectively referred to as the Transfer Agents) contract with respect to
its shares. The Transfer Agents receive account fees and asset-based fees
that vary according to the account size and type of account of the
shareholders of the respective classes of the fund. FIIOC and FSC pay for
typesetting, printing and mailing of all shareholder reports. For the
period, the following amounts were paid to each transfer agent:
                        TRANSFER   AMOUNT        % OF         
                        AGENT                    AVERAGE      
                                                 NET ASSETS   
 
CLASS A                 FIIOC *    $ 789          .22% **     
 
CLASS T                 FIIOC *     1,513         .14% **     
 
CLASS B                 FIIOC *     881           .57% **     
 
INITIAL CLASS            FSC *      1,028,957     .20%        
 
INSTITUTIONAL CLASS     FIIOC *     2,620         .21% **     
 
                                   $ 1,034,760                
 
* FIDELITY INVESTMENTS INSTITUTIONAL OPERATIONS COMPANY, INC. (FIIOC), AND
FIDELITY SERVICE COMPANY, INC. (FSC), AFFILIATES OF FMR.
** ANNUALIZED
ACCOUNTING FEES. FSC maintains the fund's accounting records. The fee is
based on the level of average net assets for the month plus out-of-pocket
expenses. 
5. EXPENSE REDUCTIONS.
FMR voluntarily agreed to reimburse operating expenses (excluding interest,
taxes, brokerage commissions and extraordinary expenses) above the
following annual rates or range of annual rates of average net assets for
each class:
                       FMR           REIMBURSEME   
                       EXPENSE       NT            
                       LIMITATIONS                 
 
CLASS A                 .90%         $ 10,408      
 
CLASS T                 1.00%         10,413       
 
CLASS B                 1.65%         10,927       
 
INSTITUTIONAL CLASS     .75%          12,094       
 
                                     $ 43,842      
 
5. EXPENSE REDUCTIONS - CONTINUED
In addition, the fund has entered into arrangements with its custodian and
each class' transfer agent whereby credits realized as a result of
uninvested cash balances were used to reduce a portion of expenses. During
the period, the fund's custodian fees were reduced by $8,474 under the
custodian arrangement, and each applicable class' expenses were reduced as
follows under the transfer agent arrangements:
                       TRANSFER    
                       AGENT       
                       INTEREST    
                       CREDITS     
 
INSTITUTIONAL CLASS    $ 629       
 
6. DISTRIBUTIONS TO SHAREHOLDERS.
Distributions to shareholders of each class were as follows:
                                                            
 
                              YEAR ENDED     YEAR ENDED     
                              JULY 31,       JULY 31,       
                              1997 A         1996           
 
CLASS A                                                     
 
From net investment income    $ 21,750       $ -            
 
CLASS T                                                     
 
From net investment income    $ 64,445       $ -            
 
CLASS B                                                     
 
From net investment income    $ 8,241        $ -            
 
INITIAL CLASS                                               
 
From net investment income    $ 32,474,399   $ 31,178,449   
 
From net realized gain         5,039,533      4,055,960     
 
Total                         $ 37,513,932   $ 35,234,409   
                                                            
 
INSTITUTIONAL CLASS                                         
 
From net investment income    $ 80,890       $ -            
 
                              $ 37,689,258   $ 35,234,409   
 
A DISTRIBUTIONS FOR CLASS A, T, B, AND INSTITUTIONAL CLASS ARE FOR THE
PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF SHARES) TO JULY 31, 1997.
7. SHARE TRANSACTIONS.
Share transactions for each class of shares were as follows:
 
<TABLE>
<CAPTION>
<S>                        <C>             <C>             <C>              <C>              
                           SHARES                          DOLLARS                           
 
                           YEAR ENDED      YEAR ENDED      YEAR ENDED       YEAR ENDED       
                           JULY 31,        JULY 31,        JULY 31,         JULY 31,         
 
                           1997 A          1996            1997 A           1996             
 
                                                                                             
 
CLASS A                     141,575         -              $ 1,531,983      $ -              
Shares sold                                                                                  
 
Reinvestment of             1,989           -               21,750           -               
distributions                                                                                
 
Net increase (decrease)     143,564         -              $ 1,553,733      $ -              
 
CLASS T                     1,114,285       -              $ 12,183,453     $ -              
Shares sold                                                                                  
 
Reinvestment of             5,597           -               61,712           -               
distributions                                                                                
 
Shares redeemed             (16,202)        -               (177,848)        -               
 
Net increase (decrease)     1,103,680       -              $ 12,067,317     $ -              
 
CLASS B                     73,891          -              $ 801,025        $ -              
Shares sold                                                                                  
 
Reinvestment of             687             -               7,506            -               
distributions                                                                                
 
Net increase (decrease)     74,578          -              $ 808,531        $ -              
 
INITIAL CLASS               14,636,021      24,584,693     $ 158,564,289    $ 268,954,246    
Shares sold                                                                                  
 
Reinvestment of             2,769,613       2,644,498       29,925,102       28,910,230      
distributions                                                                                
 
Shares redeemed             (16,911,618)    (20,139,279)    (183,183,589)    (219,915,312)   
 
Net increase (decrease)     494,016         7,089,912      $ 5,305,802      $ 77,949,164     
 
INSTITUTIONAL CLASS         1,216,421       -              $ 13,282,379     $ -              
Shares sold                                                                                  
 
Reinvestment of             3,516           -               38,560           -               
distributions                                                                                
 
Shares redeemed             (26,465)        -               (290,779)        -               
 
Net increase (decrease)     1,193,472       -              $ 13,030,160     $ -              
 
</TABLE>
 
A SHARE TRANSACTIONS FOR CLASS A, T, B, AND INSTITUTIONAL CLASS ARE FOR THE
PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF SHARES) TO JULY 31, 1997.
8. REGISTRATION FEES.
For the period, each class paid the following amounts to register its
shares for sale:
                       REGISTRATION   
                       FEES           
 
CLASS A                $ 10,398       
 
CLASS T                 11,098        
 
CLASS B                 10,398        
 
INITIAL CLASS           31,365        
 
INSTITUTIONAL CLASS     12,152        
 
                       $ 75,411       
 
REPORT OF INDEPENDENT ACCOUNTANTS
 
 
To the Trustees of Fidelity Income Fund and the Shareholders of Fidelity
Advisor Mortgage Securities Fund (formerly Fidelity Mortgage Securities
Fund):
In our opinion, the accompanying statement of assets and liabilities,
including the schedule of investments, and the related statements of
operations and of changes in net assets and the financial highlights
present fairly, in all material respects, the financial position of
Fidelity Advisor Mortgage Securities Fund (formerly Fidelity Mortgage
Securities Fund) (a fund of Fidelity Income Fund) at July 31, 1997, the
results of its operations for the year then ended, and the changes in its
net assets and the financial highlights for the periods indicated, in
conformity with generally accepted accounting principles. These financial
statements and financial highlights (hereafter referred to as "financial
statements") are the responsibility of the Fidelity Advisor Mortgage
Securities Fund's management; our responsibility is to express an opinion
on these financial statements based on our audits. We conducted our audits
of these financial statements in accordance with generally accepted
auditing standards which require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial
statements, assessing the accounting principles used and significant
estimates made by management, and evaluating the overall financial
statement presentation. We believe that our audits, which included
confirmation of securities at July 31, 1997 by correspondence with the
custodian and the application of alternative auditing procedures where
securities purchased were not yet received by the custodian, provide a
reasonable basis for the opinion expressed above.
/s/ PRICE WATERHOUSE LLP
PRICE WATERHOUSE LLP
Boston, Massachusetts
September 18, 1997
DISTRIBUTIONS
 
 
The Board of Trustees of Fidelity Advisor Mortgage Securities Fund
(formerly Fidelity Mortgage Securities Fund) voted to pay to shareholders
of record at the opening of business on record date, the following
distributions derived from capital gains realized from sales of portfolio
securities, and dividends derived from net investment income:
 PAY DATE RECORD DATE DIVIDENDS CAPITAL GAINS
Class A 9/8/97 9/5/97 - $.08
Class T 9/8/97 9/5/97 - $.08
Class B 9/8/97 9/5/97 - $.08
Initial Class 9/8/97 9/5/97 - $.08
Institutional Class 9/8/97 9/5/97 - $.08
A total of 0.01% of the dividends distributed during the fiscal year was
derived from interest on U.S. Government securities which is generally
exempt from state income tax.
The fund will notify shareholders in January 1998 of the applicable
percentage for use in preparing 1997 income tax returns.
 
 
 
 
 
 
INVESTMENT ADVISER
Fidelity Management & Research Company
Boston, MA
INVESTMENT SUB-ADVISERS
Fidelity Management & Research 
 (U.K.) Inc., London, England
Fidelity Management & Research 
 (Far East) Inc., Tokyo, Japan
OFFICERS
Edward C. Johnson 3d, President
Robert C. Pozen, Senior Vice President
Fred L. Henning, Jr., Vice President
Dwight D. Churchill, Vice President
Kevin Grant, Vice President
Arthur S. Loring, Secretary
Richard A. Silver, Treasurer
John H. Costello, Assistant Treasurer
Leonard M. Rush, Assistant Treasurer
BOARD OF TRUSTEES
Ralph F. Cox *
Phyllis Burke Davis *
Robert M. Gates *
Edward C. Johnson 3d
E. Bradley Jones *
Donald J. Kirk *
Peter S. Lynch
Marvin L. Mann *
William O. McCoy *
Gerald C. McDonough *
Robert C. Pozen
Thomas R. Williams *
ADVISORY BOARD
J. Gary Burkhead
GENERAL DISTRIBUTOR
Fidelity Distributors Corporation
Boston, MA
TRANSFER AND SHAREHOLDER
SERVICING AGENT
Fidelity Investments Institutional Operations Company, Inc.
Boston, MA
CUSTODIAN
The Bank of New York
New York, NY
FOCUS FUNDS
Fidelity Advisor Consumer 
Industries Fund
Fidelity Advisor Cyclical 
Industries Fund
Fidelity Advisor Financial 
Services Fund
Fidelity Advisor Health Care Fund
Fidelity Advisor Natural 
Resources Fund
Fidelity Advisor Technology Fund
Fidelity Advisor Utilities Growth Fund
GROWTH FUNDS
Fidelity Advisor Overseas Fund
Fidelity Advisor TechnoQuant(trademark) 
Growth Fund
Fidelity Advisor Mid Cap Fund
Fidelity Advisor Equity Growth Fund
Fidelity Advisor Growth
Opportunities Fund
Fidelity Advisor Strategic
Opportunities Fund
Fidelity Advisor Large Cap Fund
GROWTH AND INCOME FUNDS
Fidelity Advisor Growth & Income Fund
Fidelity Advisor Equity Income Fund
Fidelity Advisor Balanced Fund
TAXABLE INCOME FUNDS
Fidelity Advisor Emerging Markets Income Fund
Fidelity Advisor High Yield Fund
Fidelity Advisor Strategic Income Fund
Fidelity Advisor Mortgage
Securities Fund
Fidelity Advisor Government Investment Fund
Fidelity Advisor Intermediate Bond Fund
Fidelity Advisor Short Fixed-Income Fund
MUNICIPAL FUNDS
Fidelity Advisor High Income
Municipal Fund
Fidelity Advisor Municipal Bond Fund
Fidelity Advisor Intermediate Municipal Income Fund
Fidelity Advisor Short-Intermediate Municipal Income Fund
STATE MUNICIPAL FUNDS
Fidelity Advisor California Municipal Income Fund
Fidelity Advisor New York Municipal Income Fund
MONEY MARKET FUNDS
Prime Fund
Treasury Fund
Tax-Exempt Fund
 
(REGISTERED TRADEMARK)
 
 
(2_FIDELITY_LOGOS)FIDELITY ADVISOR
(registered trademark)
 
MORTGAGE SECURITIES 
FUND - INSTITUTIONAL CLASS
ANNUAL REPORT
JULY 31, 1997
CONTENTS
 
 
PRESIDENT'S MESSAGE      3    Ned Johnson on investing                 
                              strategies.                              
 
PERFORMANCE              4    How the fund has done over time.         
 
FUND TALK                7    The manager's review of fund             
                              performance, strategy and outlook.       
 
INVESTMENT CHANGES       10   A summary of major shifts in the         
                              fund's investments over the past six     
                              months.                                  
 
INVESTMENTS              11   A complete list of the fund's            
                              investments with their market            
                              values.                                  
 
FINANCIAL STATEMENTS     14   Statements of assets and liabilities,    
                              operations, and changes in net           
                              assets,                                  
                              as well as financial highlights.         
 
NOTES                    23   Notes to financial statements.           
 
REPORT OF INDEPENDENT    31   The auditors' opinion.                   
ACCOUNTANTS                                                            
 
DISTRIBUTIONS            32                                            
 
 
THIS REPORT AND THE FINANCIAL STATEMENTS CONTAINED HEREIN ARE SUBMITTED FOR
THE GENERAL 
INFORMATION OF THE SHAREHOLDERS OF THE FUND. THIS REPORT IS NOT AUTHORIZED
FOR DISTRIBUTION TO 
PROSPECTIVE INVESTORS IN THE FUND UNLESS PRECEDED OR ACCOMPANIED BY AN
EFFECTIVE 
PROSPECTUS. 
MUTUAL FUND SHARES ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED BY, 
ANY DEPOSITORY INSTITUTION. SHARES ARE NOT INSURED BY THE FDIC, 
FEDERAL RESERVE BOARD OR ANY OTHER AGENCY, AND ARE SUBJECT TO 
INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL AMOUNT INVESTED. 
NEITHER THE FUND NOR FIDELITY DISTRIBUTORS CORPORATION IS A BANK. 
FOR MORE INFORMATION ON ANY FIDELITY ADVISOR FUND, INCLUDING CHARGES AND
EXPENSES, 
CONTACT YOUR INVESTMENT PROFESSIONAL FOR A FREE PROSPECTUS. READ IT
CAREFULLY BEFORE YOU 
INVEST OR SEND MONEY.
PRESIDENT'S MESSAGE
 
 
(PHOTO_OF_EDWARD_C_JOHNSON_3D)DEAR SHAREHOLDER:
Through the first seven months of 1997, stock and bond markets experienced
the kind of short-term volatility that can affect them periodically. The
stock market rebounded strongly from its early spring correction to
continue on its record-setting pace, as seen by the roughly 30%
year-to-date gain by the Standard & Poor's 500 Index. The bond market
posted moderate returns over the past seven months, as positive news on the
inflation front helped soften the effects of a hike in short-term interest
rates by the Federal Reserve Board in late March.
While it's impossible to predict the future direction of the markets with
any degree of certainty, there are certain basic principles that can help
investors plan for their future needs.
The longer your investment time frame, the less likely it is that you will
be affected by short-term market volatility. A 10-year investment horizon
appropriate for saving for a college education, for example, enables you to
weather market cycles in a long-term fund, which may have a higher risk
potential, but also has a higher potential rate of return.
An intermediate-length fund could make sense if your investment horizon is
two to four years, while a short-term bond fund could be the right choice
if you need your money in one or two years.
If your time horizon is less than a year, you might want to consider moving
some of your bond investment into a money market fund. These funds seek
income and a stable share price by investing in high-quality, short-term
investments. Of course, it's important to remember that there is no
assurance that a money market fund will achieve its goal of maintaining a
stable net asset value of $1.00 per share, and that these types of funds
are neither insured nor guaranteed by any agency of the U.S. government.
Finally, no matter what your time horizon or portfolio diversity, it makes
good sense to follow a regular investment plan, investing a certain amount
of money in a fund at the same time each month or quarter and periodically
reviewing your overall portfolio. By doing so, you won't get caught up in
the excitement of a rapidly rising market, nor will you buy all your shares
at market highs. While this strategy - known as dollar cost averaging -
won't assure a profit or protect you from a loss in a declining market, it
should help you lower the average cost of your purchases.
Remember to contact your investment professional if you need help with your
investments.
Best regards,
Edward C. Johnson 3d
ADVISOR MORTGAGE SECURITIES FUND - INSTITUTIONAL CLASS
PERFORMANCE: THE BOTTOM LINE
 
 
There are several ways to evaluate historical performance. You can look at
the total percentage change in value, the average annual percentage change
or the growth of a hypothetical $10,000 investment. Total return reflects
the change in the value of an investment, assuming reinvestment of the
class' dividend income and capital gains (the profits earned upon the sale
of securities that have grown in value). You can also look at the class'
income, as reflected in its yield, to measure performance. The initial
offering of Institutional Class shares took place on March 3, 1997. Returns
prior to March 3, 1997 are those of Initial Class, the original class of
the fund. If Fidelity had not reimbursed certain class expenses, the total
returns and dividends would have been lower.
CUMULATIVE TOTAL RETURNS
PERIODS ENDED JULY 31, 1997                PAST 1   PAST 5   PAST 10   
                                           YEAR     YEARS    YEARS     
 
Advisor Mortgage Securities Fund -         10.22%   44.56%   132.27%   
 Institutional Class                                                   
 
Salomon Brothers Mortgage Index            10.60%   41.23%   143.95%   
 
U.S. Mortgage Funds Average                10.05%   33.27%   114.95%   
 
CUMULATIVE TOTAL RETURNS show Institutional Class' performance in
percentage terms over a set period - in this case, one year, five years or
10 years. For example, if you had invested $1,000 in a fund that had a 5%
return over the past year, the value of your investment would be $1,050.
You can compare Institutional Class' returns to the performance of the
Salomon Brothers Mortgage Index - a market capitalization weighted index of
15- and 30-year fixed-rate securities backed by mortgage pools of the
Government National Mortgage Association (GNMA), Federal National Mortgage
Association (FNMA) and Federal Home Loan Mortgage Corporation (FHLMC), and
FNMA and FHLMC balloon mortgages with fixed-rate coupons. To measure how
Institutional Class' performance stacked up against its peers, you can
compare it to the U.S. mortgage funds average, which reflects the
performance of mutual funds with similar objectives tracked by Lipper
Analytical Services, Inc. The past one year average represents a peer group
of 59 mutual funds. These benchmarks reflect reinvestment of dividends and
capital gains, if any, and exclude the effect of sales charges.
AVERAGE ANNUAL TOTAL RETURNS
PERIODS ENDED JULY 31, 1997          PAST 1   PAST 5   PAST 10   
                                     YEAR     YEARS    YEARS     
 
Advisor Mortgage Securities Fund -   10.22%   7.65%    8.79%     
 Institutional Class                                             
 
Salomon Brothers Mortgage Index      10.60%   7.15%    9.33%     
 
U.S. Mortgage Funds Average          10.05%   5.90%    7.93%     
 
AVERAGE ANNUAL TOTAL RETURNS take Institutional Class' cumulative return
and show you what would have happened if Institutional Class had performed
at a constant rate each year. 
$10,000 OVER 10 YEARS
IMAHDR PRASUN   SHR__CHT 19970731 19970814 163138 S00000000000001
             FA Mortgage Sec -CL I       SB Mortgage
             00240                       SB005
  1987/07/31      10000.00                    10000.00
  1987/08/31       9967.99                     9954.81
  1987/09/30       9716.36                     9725.84
  1987/10/31      10004.28                    10044.81
  1987/11/30      10099.69                    10186.41
  1987/12/31      10227.48                    10305.04
  1988/01/31      10571.43                    10704.98
  1988/02/29      10685.42                    10833.40
  1988/03/31      10622.10                    10753.18
  1988/04/30      10556.36                    10686.15
  1988/05/31      10512.46                    10662.80
  1988/06/30      10722.84                    10930.93
  1988/07/31      10697.37                    10897.42
  1988/08/31      10710.95                    10920.39
  1988/09/30      10926.37                    11180.24
  1988/10/31      11131.14                    11434.81
  1988/11/30      10983.96                    11270.62
  1988/12/31      10914.47                    11212.25
  1989/01/31      11112.51                    11423.14
  1989/02/28      11053.67                    11336.52
  1989/03/31      11075.51                    11339.53
  1989/04/30      11279.96                    11539.50
  1989/05/31      11546.92                    11918.36
  1989/06/30      11826.37                    12221.51
  1989/07/31      12038.13                    12511.49
  1989/08/31      11910.98                    12326.96
  1989/09/30      11962.98                    12412.82
  1989/10/31      12200.25                    12702.79
  1989/11/30      12317.82                    12840.25
  1989/12/31      12402.72                    12911.80
  1990/01/31      12288.46                    12818.41
  1990/02/28      12370.32                    12870.38
  1990/03/31      12380.04                    12922.72
  1990/04/30      12272.95                    12802.59
  1990/05/31      12629.75                    13191.99
  1990/06/30      12812.84                    13410.03
  1990/07/31      12999.05                    13637.87
  1990/08/31      12964.67                    13525.65
  1990/09/30      13033.88                    13635.23
  1990/10/31      13167.40                    13778.34
  1990/11/30      13455.52                    14085.64
  1990/12/31      13687.62                    14317.99
  1991/01/31      13829.66                    14527.00
  1991/02/28      13918.20                    14619.27
  1991/03/31      14011.81                    14725.84
  1991/04/30      14163.49                    14879.49
  1991/05/31      14237.12                    15008.29
  1991/06/30      14272.73                    15024.48
  1991/07/31      14477.73                    15278.30
  1991/08/31      14754.40                    15558.48
  1991/09/30      14984.74                    15857.50
  1991/10/31      15161.86                    16102.66
  1991/11/30      15254.55                    16213.00
  1991/12/31      15550.89                    16558.71
  1992/01/31      15476.08                    16390.37
  1992/02/29      15630.07                    16544.40
  1992/03/31      15522.06                    16471.34
  1992/04/30      15667.58                    16621.98
  1992/05/31      15926.18                    16930.41
  1992/06/30      16094.92                    17137.15
  1992/07/31      16067.30                    17273.86
  1992/08/31      16171.23                    17506.59
  1992/09/30      16272.75                    17642.16
  1992/10/31      16110.93                    17493.79
  1992/11/30      16188.80                    17566.09
  1992/12/31      16398.88                    17780.00
  1993/01/31      16548.50                    18024.78
  1993/02/28      16690.23                    18191.23
  1993/03/31      16799.22                    18300.07
  1993/04/30      16916.50                    18423.59
  1993/05/31      16966.59                    18507.95
  1993/06/30      17173.57                    18687.96
  1993/07/31      17267.97                    18765.53
  1993/08/31      17300.12                    18842.74
  1993/09/30      17337.91                    18858.93
  1993/10/31      17368.75                    18922.20
  1993/11/30      17332.45                    18888.68
  1993/12/31      17499.73                    19030.65
  1994/01/31      17660.89                    19221.96
  1994/02/28      17567.76                    19101.83
  1994/03/31      17368.67                    18630.71
  1994/04/30      17292.58                    18513.22
  1994/05/31      17439.79                    18575.73
  1994/06/30      17529.05                    18529.79
  1994/07/31      17809.27                    18891.32
  1994/08/31      17889.06                    18930.10
  1994/09/30      17695.16                    18676.66
  1994/10/31      17731.09                    18671.76
  1994/11/30      17713.40                    18604.73
  1994/12/31      17839.51                    18758.76
  1995/01/31      18176.79                    19178.65
  1995/02/28      18583.72                    19667.47
  1995/03/31      18662.58                    19747.68
  1995/04/30      18956.81                    20012.43
  1995/05/31      19553.27                    20660.92
  1995/06/30      19702.44                    20770.51
  1995/07/31      19747.19                    20811.93
  1995/08/31      19990.85                    21002.86
  1995/09/30      20197.51                    21190.78
  1995/10/31      20422.18                    21385.86
  1995/11/30      20648.30                    21636.66
  1995/12/31      20875.78                    21904.42
  1996/01/31      21046.69                    22072.38
  1996/02/29      20912.59                    21897.27
  1996/03/31      20836.72                    21823.08
  1996/04/30      20793.28                    21722.15
  1996/05/31      20712.78                    21693.91
  1996/06/30      20998.62                    21970.70
  1996/07/31      21073.61                    22058.07
  1996/08/31      21068.96                    22061.84
  1996/09/30      21402.40                    22432.78
  1996/10/31      21798.41                    22868.49
  1996/11/30      22135.19                    23183.32
  1996/12/31      22010.37                    23080.89
  1997/01/31      22148.12                    23276.72
  1997/02/28      22220.32                    23301.95
  1997/03/31      22007.12                    23109.14
  1997/04/30      22351.75                    23460.50
  1997/05/31      22571.61                    23679.30
  1997/06/30      22835.51                    23951.95
  1997/07/31      23226.99                    24395.19
IMATRL PRASUN   SHR__CHT 19970731 19970814 163141 R00000000000123
 
$10,000 OVER 10 YEARS:  Let's say hypothetically that $10,000 was invested
in Fidelity Advisor Mortgage Securities Fund - Institutional Class on July
31, 1987. As the chart shows, by July 31, 1997, the value of the investment
would have grown to $23,227 - a 132.27% increase on the initial investment.
For comparison, look at how the Salomon Brothers Mortgage Index did over
the same period. With dividends and capital gains, if any, reinvested, the
same $10,000 investment would have grown to $24,395 - a 143.95% increase.
UNDERSTANDING
PERFORMANCE
How a fund did yesterday is 
no guarantee of how it will do 
tomorrow. Bond prices, for 
example, generally move in the 
opposite direction of interest 
rates. In turn, the share price, 
return and yield of a fund that 
invests in bonds will vary. That 
means if you sell your shares 
during a market downturn, you 
might lose money. But if you 
can ride out the market's ups 
and downs, you may have a 
gain.
(checkmark)
TOTAL RETURN COMPONENTS
                         YEARS ENDED JULY 31,                               
 
                  1997   1996                   1995   1994   1993   1992   
 
 
<TABLE>
<CAPTION>
<S>                           <C>   <C>      <C>      <C>      <C>      <C>     <C>      
Dividend return                     6.74%    6.81%    7.46%    5.52%    6.73%   7.64%    
 
Capital appreciation return         3.48%    -0.09%    3.42%   -2.39%   0.74%    3.34%   
 
Total return                        10.22%   6.72%    10.88%   3.13%    7.47%   10.98%   
 
</TABLE>
 
TOTAL RETURN COMPONENTS include both dividend returns and capital
appreciation returns. A dividend return reflects the actual dividends paid
by the class. A capital appreciation return reflects both the amount paid
by the class to shareholders as capital gain distributions and changes in
the class' share price. Both returns assume the dividends or capital gains
paid by the class are reinvested, if any.
DIVIDENDS AND YIELD
PERIODS ENDED JULY 31, 1997    PAST 1        LIFE OF        
                               MONTH         CLASS          
 
Dividends per share            5.70(cents)   27.91(cents)   
 
Annualized dividend rate       6.11%         6.22%          
 
30-day annualized yield        n/a           -              
 
DIVIDENDS per share show the income paid by the class for a set period. If
you annualize this number, based on an average share price of $10.99 over
the past one month, and $10.84 over the life of the class, you can compare
the class' income over these two periods. The 30-day annualized YIELD is a
standard formula for all funds based on the yields of the bonds in the
fund, averaged over the past 30 days. This figure shows you the yield
characteristics of the fund's investments at the end of the period. It also
helps you compare funds from different companies on an equal basis. Yield
information will be reported once Institutional Class has a longer, more
stable operating history.
FUND TALK: THE MANAGER'S OVERVIEW
 
 
 
MARKET RECAP
A favorable inflation backdrop 
steadied fears of higher interest 
rates, buoying the U.S. taxable 
bond market for the 12 months that 
ended July 31, 1997. The Lehman 
Brothers Aggregate Bond Index - 
a broad measure of the U.S. 
taxable bond market - returned 
10.76% over the period. For the 
first eight months of the period, 
bonds suffered from increasing 
expectations of economic growth 
and inflation. In his February 
testimony before Congress, 
Federal Reserve Board Chairman 
Alan Greenspan indicated that the 
Fed was inclined to raise the rate 
banks charge each other for 
overnight loans - known as the 
fed funds target rate - to head off 
inflation that might be caused by a 
tight labor market. On March 25, 
the Fed followed through by 
raising the target rate by 0.25% to 
5.50%. However, this move largely 
had been priced into the market. 
Weakening economic and inflation 
signals - combined with the Fed's 
shift to a more favorable stance 
indicating no intention to raise 
rates in the short term - helped 
spark a rally in all debt markets 
from April through the end of the 
period. Relative interest-rate 
stability provided a positive setting 
for mortgage-backed securities. 
For the 12 months that ended July 
31, 1997, the Salomon Brothers 
Mortgage Index returned 10.60%. 
Sustained economic growth and 
demand from yield-hungry 
investors helped corporate bonds, 
with the Lehman Brothers 
Corporate Bond Index returning 
12.55% over the same period.
NOTE TO SHAREHOLDERS: The following is an interview with Thomas Silvia, who
co-manages Fidelity Advisor Mortgage Securities Fund with Kevin Grant. On
October 1, 1997, Silvia will become the sole Portfolio Manager of the fund.
Q. HOW DID THE FUND PERFORM, TOM?
A. For the 12 months that ended July 31, 1997, the fund's Institutional
Class shares returned 10.22%. During the same period, the U.S. mortgage
funds average, according to Lipper Analytical Services, returned 10.05% and
the Salomon Brothers Mortgage Index returned 10.60%. 
Q. WHAT HELPED THE FUND'S 
PERFORMANCE DURING THE PERIOD?
A. We continued to get good performance from our small position in
commercial mortgage-backed securities - bonds issued and backed by office
buildings, shopping malls and multi-housing structures. These investments
produced stronger returns than were generated by the overall mortgage
market. In addition, the fund was overweighted relative to the index in
30-year Fannie Mae (Federal National Mortgage Association) discount bonds,
which are priced below par, and current-coupon bonds, which are mortgage
securities that pay a similar coupon - or periodic interest payment - as
those being created at the current market rate. These securities
outperformed comparable 30-year Ginnie Mae (Government National Mortgage
Association) bonds and 15-year mortgage-backed securities during the
period.
Q. WHAT FACTORS IN THE MORTGAGE MARKET AFFECTED THE FUND'S PERFORMANCE?
A. The mortgage market benefited greatly from a period of relatively stable
interest rates. For example, the yield on a 10-year Treasury has lingered
in a range of 6% to 7% for about 18 months - a small fluctuation compared
to the range we've seen over the past 10 years. A calm interest-rate
environment reduces the largest source of risk for mortgage securities -
prepayments. For instance, when interest rates decline, mortgage holders
are likely to refinance their debt at a lower rate. This hurts mortgage
investors because they are forced to reinvest at a lower interest rate. On
the other hand, when interest rates are steady, the risk of prepayments
declines. This has been the case for the past 12 months and, as a result,
the mortgage sector was one of the best-performing categories of the bond
market. 
Q. WHICH AREAS OF THE MORTGAGE MARKET DID YOU TARGET?
A. We retained a small position in commercial mortgage-backed securities,
which was more of a selective investment in a few particular bonds than an
overall sector allocation. The fund also maintained a slightly
underweighted position relative to the index in balloon mortgages. Overall,
the strong performance of the mortgage market during the period reduced the
number of attractive investment opportunities. The reward for taking on
risk was low, so it was a time to hold more liquid securities and keep the
fund's portfolio relatively close to the allocations in the fund's
benchmark index - the Salomon Brothers Mortgage Index.
Q. DID THE FUND'S RELATIVELY SMALL POSITION IN BALLOON MORTGAGES HELP THE
FUND?
A. Balloons are mortgages that are constructed with a typical 30-year
amortization schedule, but differ from the standard mortgage in that the
homeowner agrees to pay the outstanding balance on a specified - or balloon
- - date, usually within five or seven years of issuance. The stable
interest-rate environment benefited the 30-year sector the most, the
15-year sector the second most, and the balloon sector the least.
Consequently, the fund benefited from not having a significant position in
balloons during the period.
Q. WERE THERE ANY DISAPPOINTMENTS DURING THE PERIOD?
A. I think the reduced number of attractive investment alternatives in the
mortgage market was the biggest disappointment. The fund has typically done
its best when the market goes through a dramatic change. That's because our
value-driven, bottom-up security selection process allows us to capitalize
on larger and more frequent misvaluations in the mortgage market. When
everything is trading in so tight a range, there aren't many changes in
values or prepayment options to affect the cash flows of bonds. Therefore,
in a relatively stable environment, we are not able to take advantage of
our research and trading skills to the same degree.
Q. WHAT'S YOUR OUTLOOK FOR THE MORTGAGE MARKET?
A. At the end of the period, we hit a 6% yield on the 10-year Treasury,
which leaves the mortgage market on a cliff. If yields drop below 6%, it
will be an attractive environment for homeowners to refinance and prepay
their mortgages. This likely would cause the mortgage sector to
underperform other types of bonds. On the other hand, if interest rates
remain stable, the mortgage market should continue to perform well.
THE VIEWS EXPRESSED IN THIS REPORT REFLECT THOSE OF THE PORTFOLIO MANAGER
ONLY THROUGH THE END OF THE PERIOD OF THE REPORT AS STATED ON THE COVER.
THE MANAGER'S VIEWS ARE SUBJECT TO CHANGE AT ANY TIME BASED ON MARKET AND
OTHER CONDITIONS.
 
FUND FACTS
GOAL: high current income 
by investing in mortgage 
securities of all kinds
START DATE: December 31, 
1984
SIZE: as of July 31, 1997, 
more than $533 million
MANAGER: Thomas Silvia, 
co-managed since February 
1997; joined Fidelity in 1993
(checkmark)
THOMAS SILVIA ON HIS 
INVESTMENT STRATEGY: 
"The fund's overall market risk 
will be targeted to its 
benchmark, the Salomon 
Brothers Mortgage Index. I 
look to add incremental return 
by the use of a value-driven, 
bottom-up approach to finding 
individual mortgage-backed 
securities that offer higher 
expected returns or 
potentially better price 
performance than securities 
in the benchmark. This 
approach takes advantage of 
the skills offered by our 
quantitative research group, 
as well as our trading desk. In 
addition, I will continue to look 
for opportunities outside of 
the fund's benchmark, such 
as commercial 
mortgage-backed securities."
INVESTMENT CHANGES
 
 
COUPON DISTRIBUTION AS OF JULY 31, 1997
                % OF FUND'S    % OF FUND'S INVESTMENTS   
                INVESTMENTS    6 MONTHS AGO              
 
 Less than 5%    0.1            0.1                      
 
 5 -  5.99%      4.7            6.2                      
 
 6 -  6.99%      25.7           29.3                     
 
 7 -  7.99%      27.0           30.7                     
 
 8 -  8.99%      20.2           12.2                     
 
 9 -  9.99%      6.6            4.0                      
 
10 - 10.99%      3.5            4.4                      
 
11% and over     2.3            3.0                      
 
COUPON DISTRIBUTION SHOWS THE RANGE OF STATED INTEREST RATES ON THE FUND'S
INVESTMENTS, EXCLUDING REPURCHASE AGREEMENTS.
AVERAGE YEARS TO MATURITY AS OF JULY 31, 1997
               6 MONTHS AGO   
 
Years    5.8    6.3           
 
AVERAGE YEARS TO MATURITY IS BASED ON THE AVERAGE TIME UNTIL PRINCIPAL
PAYMENTS ARE EXPECTED FROM EACH OF THE FUND'S BONDS, WEIGHTED BY DOLLAR
AMOUNT.
DURATION AS OF JULY 31, 1997
               6 MONTHS AGO    
 
Years    3.2    4.0            
 
DURATION SHOWS HOW MUCH A BOND FUND'S PRICE FLUCTUATES WITH CHANGES IN
COMPARABLE INTEREST RATES. IF RATES RISE 1%, FOR EXAMPLE, A FUND WITH A
FIVE-YEAR DURATION IS LIKELY TO LOSE ABOUT 5% OF ITS VALUE. OTHER FACTORS
ALSO CAN INFLUENCE A BOND FUND'S PERFORMANCE AND SHARE PRICE. ACCORDINGLY,
A BOND FUND'S ACTUAL PERFORMANCE MAY DIFFER FROM THIS EXAMPLE.
ASSET ALLOCATION (% OF FUND'S INVESTMENTS)
AS OF JULY 31, 1997 AS OF JANUARY 31, 1997 
Row: 1, Col: 1, Value: 9.800000000000001
Row: 1, Col: 2, Value: 2.9
Row: 1, Col: 3, Value: 87.3
Mortgage-backed
securities 87.6%
CMOs and
other mortgage
related securities 2.3%
Short-term
investments 10.1%
Mortgage-backed
securities 87.3%
CMOs and 
other mortgage
related securities 2.8%
Short-term
investments 9.9%
Row: 1, Col: 1, Value: 10.1
Row: 1, Col: 2, Value: 2.3
Row: 1, Col: 3, Value: 87.59999999999999
 
INVESTMENTS JULY 31, 1997 
 
Showing Percentage of Total Value of Investment in Securities
 
 
U.S. GOVERNMENT AGENCY - MORTGAGE-BACKED SECURITIES - 87.3%
  PRINCIPAL VALUE
  AMOUNT (NOTE 1)
FEDERAL HOME LOAN MORTGAGE CORPORATION - 15.7%
5%, 7/1/10  $ 4,019,563 $ 3,795,975
6 1/2%, 1/1/24 to 7/1/24  4,480,017  4,411,427
7%, 5/1/99 to 8/1/12  16,562,905  16,757,226
7 1/2%, 10/1/11 to 7/1/12  35,640,019  36,482,404
7 1/2%, 8/1/27 (e)  3,500,000  3,561,250
8%, 10/1/07 to 12/1/18  767,774  794,814
8 1/2%, 11/1/03 to 1/1/20  2,437,117  2,554,427
9%, 9/1/08 to 5/1/21  11,954,777  12,802,489
10%, 1/1/09 to 5/1/19  2,502,185  2,726,412
10 1/2%, 8/1/10 to 12/1/20  2,723,982  3,011,806
11 1/2%, 4/1/12  111,151  124,061
11 3/4%, 6/1/11  69,701  78,657
12 1/4%, 6/1/14 to 7/1/15  314,042  360,277
12 1/2%, 5/1/12 to 4/1/15  1,236,677  1,428,593
12 3/4%, 6/1/05 to 3/1/15  204,003  229,242
13%, 1/1/11 to 6/1/15  1,855,544  2,187,117
  91,306,177
 
FEDERAL NATIONAL MORTGAGE ASSOCIATION - 40.1%
5 1/2%, 11/1/08 to 5/1/26  24,273,187  23,420,456
6%, 4/1/00 to 5/1/26  87,078,670  84,355,052
6 1/2%, 9/1/10 to 4/1/26  56,791,751  55,821,852
7%, 2/1/24 to 5/1/27  31,698,840  31,684,095
7 1/2%, 3/1/22 to 12/1/22  3,449,394  3,527,311
8%, 1/1/07 to 8/1/27 (e)  15,806,073  16,257,924
8 1/4%, 1/1/13  132,558  137,062
8 1/2%, 11/1/03 to 11/1/18  2,059,489  2,137,174
8 3/4%, 11/1/08 to 7/1/09  296,023  307,877
9%, 1/1/08 to 2/1/13  1,034,999  1,084,078
9 1/2%, 5/1/07 to 8/1/22  8,581,420  9,131,717
11%, 12/1/02 to 8/1/10  2,741,172  3,009,758
12 1/4%, 5/1/13 to 6/1/15  542,105  616,601
12 1/2%, 10/1/13 to 3/1/16  724,646  839,914
12 3/4%, 6/1/13 to 7/1/15  379,431  436,032
13 1/2%, 9/1/13 to 12/1/14  192,548  229,229
14%, 5/1/12 to 11/1/14  64,062  76,803
  233,072,935
 
U.S. GOVERNMENT AGENCY - MORTGAGE-BACKED SECURITIES - CONTINUED
  PRINCIPAL VALUE
  AMOUNT (NOTE 1)
GOVERNMENT NATIONAL MORTGAGE ASSOCIATION - 31.5%
7%, 10/15/22 to 11/15/23 $ 3,665,261 $ 3,683,818
7 1/2%, 7/15/05 to 2/15/27  57,751,910  58,851,736
8%, 4/15/02 to 7/15/27  31,473,025  32,528,616
8 1/2%, 7/15/16 to 8/15/27  54,893,289  57,361,674
9%, 10/15/04 to 4/15/18  6,255,677  6,703,581
9 1/2%, 6/15/09 to 7/15/22  5,351,496  5,776,000
10%, 12/15/17 to 1/15/26  11,883,595  13,152,300
10 1/2%, 11/15/97 to 2/15/18  1,488,065  1,634,033
11%, 1/15/10 to 8/15/17  3,092,191  3,529,873
11 1/2%, 10/15/10 to 7/15/18   98,587  112,208
13%, 10/15/13  104,463  123,952
13 1/2%, 7/15/11 to 10/15/14  97,226  116,364
  183,574,155
TOTAL U.S. GOVERNMENT AGENCY - 
MORTGAGE-BACKED SECURITIES
(Cost $498,582,159)   507,953,267
COLLATERALIZED MORTGAGE OBLIGATIONS - 0.0%
U.S. GOVERNMENT AGENCY - 0.0%
Federal Home Loan Mortgage Corporation 
sequential pay Series 1353 Class A, 
5 1/2%, 11/15/04 (Cost $122,226)  131,183  130,404
COMMERCIAL MORTGAGE SECURITIES - 2.7%
Merrill Lynch Mortgage Investors, Inc. Series 1994-M1 
Class A, 8.1239%, 6/25/22 (d)  5,285,305  5,334,029
Structured Asset Securities Corp. commercial Series 1992-M1
Class C, 7.05%, 11/25/02  3,192,522  2,906,006
SASCO 1997-N1 LLC Series 1997-N1 Class C, 
6.055%, 9/25/28 (b)  5,000,000  5,000,000
SML, Inc. commercial Series 1994-C1
Class C, 9.20%, 9/18/99 (a)  3,280,000  2,693,700
TOTAL COMMERCIAL MORTGAGE SECURITIES
(Cost $14,720,222)   15,933,735
COMPLEX MORTGAGE SECURITIES - 0.1%
  PRINCIPAL VALUE
  AMOUNT (NOTE 1)
INTEREST ONLY STRIPS - 0.1%
SML, Inc. commercial Series 1994-C1 
Class S, 0.81% 9/18/99 (c) (Cost $749,264) $ 51,554,000 $ 612,204
CASH EQUIVALENTS - 9.9%
 MATURITY 
 AMOUNT 
Investments in repurchase agreements 
(U.S. Treasury obligations) in a joint 
trading account at 5.77%, dated 
7/31/97 due 8/1/97 $ 57,639,237  57,630,000
TOTAL INVESTMENT IN SECURITIES - 100%
(Cost $571,803,871)  $ 582,259,610
LEGEND
1. Restricted securities - Investment in securities not registered under
the Securities Act of 1933 (see Note 2 of Notes to Financial Statements). 
Additional information on each holding is as follows:
 ACQUISITION ACQUISITION
SECURITY DATE COST
SML, Inc. 
commercial Series
1994-C1 Class C,
9.20%, 9/18/99  8/11/94  $2,132,820
2. Security exempt from registration under Rule 144A of the Securities Act
of 1933. These securities may be resold in transactions exempt from
registration, normally to qualified institutional buyers. At the period
end, the value of these securities amounted to $5,000,000 or 0.9% of net
assets.
3. Security represents right to receive monthly interest payments on an
underlying pool of mortgages. Principal shown is the par amount of the
mortgage pool.
4. The coupon rate shown on floating or adjustable rate securities
represents the rate at period end.
5. Security purchased on delayed delivery basis (See Note 2 of Notes to
Financial Statements).
INCOME TAX INFORMATION
At July 31, 1997, the aggregate cost of investment securities for income
tax purposes was $571,956,866. Net unrealized appreciation aggregated
$10,302,744, of which $11,091,982 related to appreciated investment
securities and $789,238 related to depreciated investment securities. 
The fund hereby designates approximately $544,000 as a capital gain
dividend for the purpose of the dividend paid deduction.
FINANCIAL STATEMENTS
 
 
STATEMENT OF ASSETS AND LIABILITIES
 
<TABLE>
<CAPTION>
<S>                                                         <C>            <C>             
 JULY 31, 1997                                                                             
 
ASSETS                                                                                     
 
Investment in securities, at value (including repurchase                   $ 582,259,610   
agreements of $57,630,000) (cost $571,803,871) -                                           
See accompanying schedule                                                                  
 
Cash                                                                        115            
 
Receivable for investments sold                                             251,870        
 
Interest receivable                                                         3,066,107      
 
Prepaid expenses                                                            44,595         
 
 TOTAL ASSETS                                                               585,622,297    
 
LIABILITIES                                                                                
 
Payable for investments purchased                           $ 30,194,142                   
Regular Delivery                                                                           
 
 Delayed Delivery                                            19,626,894                    
 
Payable for fund shares redeemed                             1,026,148                     
 
Distributions payable                                        515,582                       
 
Accrued management fee                                       187,169                       
 
Distribution fees payable                                    3,034                         
 
Other payables and accrued expenses                          177,203                       
 
 TOTAL LIABILITIES                                                          51,730,172     
 
NET ASSETS                                                                 $ 533,892,125   
 
Net Assets consist of:                                                                     
 
Paid in capital                                                            $ 519,208,290   
 
Undistributed net investment income                                         230,506        
 
Accumulated undistributed net realized gain (loss)                          3,997,590      
on investments                                                                             
 
Net unrealized appreciation (depreciation) on                               10,455,739     
investments                                                                                
 
NET ASSETS                                                                 $ 533,892,125   
 
</TABLE>
 
STATEMENT OF ASSETS AND LIABILITIES - CONTINUED
 JULY 31, 1997                                                              
 
CALCULATION OF MAXIMUM OFFERING PRICE                              $11.05   
CLASS A:                                                                    
NET ASSET VALUE and redemption price per share                              
 ($1,585,920 (divided by) 143,564 shares)                                   
 
Maximum offering price per share (100/95.75 of $11.05)             $11.54   
 
CLASS T:                                                           $11.05   
NET ASSET VALUE and redemption price per share                              
 ($12,192,905 (divided by) 1,103,680 shares)                                
 
Maximum offering price per share (100/96.50 of $11.05)             $11.45   
 
CLASS B:                                                           $11.04   
NET ASSET VALUE and offering price per share                                
 ($823,411 (divided by) 74,578 shares) A                                    
 
INITIAL CLASS:                                                     $11.05   
NET ASSET VALUE, offering price and redemption price                        
 per share ($506,112,493 (divided by) 45,796,695 shares)                    
 
INSTITUTIONAL CLASS:                                               $11.04   
NET ASSET VALUE, offering price and redemption price                        
 per share ($13,177,396 (divided by) 1,193,472 shares)                      
 
A REDEMPTION PRICE PER SHARE IS EQUAL TO NET ASSET VALUE LESS ANY
APPLICABLE CONTINGENT DEFERRED SALES CHARGE.
STATEMENT OF OPERATIONS
 
<TABLE>
<CAPTION>
<S>                                                        <C>           <C>            
 YEAR ENDED JULY 31, 1997                                                               
 
INVESTMENT INCOME                                                        $ 35,932,141   
Interest                                                                                
 
EXPENSES                                                                                
 
Management fee                                             $ 2,273,788                  
 
Transfer agent fees                                         1,034,760                   
 
Distribution fees                                           4,506                       
 
Accounting fees and expenses                                208,321                     
 
Non-interested trustees' compensation                       9,585                       
 
Custodian fees and expenses                                 79,667                      
 
Registration fees                                           75,411                      
 
Audit                                                       83,730                      
 
Legal                                                       17,684                      
 
Miscellaneous                                               4,396                       
 
 Total expenses before reductions                           3,791,848                   
 
 Expense reductions                                         (52,945)      3,738,903     
 
NET INVESTMENT INCOME                                                     32,193,238    
 
REALIZED AND UNREALIZED GAIN (LOSS)                                       4,296,274     
Net realized gain (loss) on investment securities                                       
 
Change in net unrealized appreciation (depreciation) on                   14,164,021    
investment securities                                                                   
 
NET GAIN (LOSS)                                                           18,460,295    
 
NET INCREASE (DECREASE) IN NET ASSETS RESULTING                          $ 50,653,533   
FROM OPERATIONS                                                                         
 
</TABLE>
 
STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
<S>                                                       <C>             <C>             
                                                          YEAR ENDED      YEAR ENDED      
                                                          JULY 31,        JULY 31,        
                                                          1997            1996            
 
INCREASE (DECREASE) IN NET ASSETS                                                         
 
Operations                                                $ 32,193,238    $ 31,763,051    
Net investment income                                                                     
 
 Net realized gain (loss)                                  4,296,274       8,694,701      
 
 Change in net unrealized appreciation (depreciation)      14,164,021      (11,251,245)   
 
 NET INCREASE (DECREASE) IN NET ASSETS RESULTING           50,653,533      29,206,507     
FROM OPERATIONS                                                                           
 
Distributions to shareholders                              (32,649,725)    (31,178,449)   
From net investment income                                                                
 
 From net realized gain                                    (5,039,533)     (4,055,960)    
 
 TOTAL DISTRIBUTIONS                                       (37,689,258)    (35,234,409)   
 
Share transactions - net increase (decrease)               32,765,543      77,949,164     
 
  TOTAL INCREASE (DECREASE) IN NET ASSETS                  45,729,818      71,921,262     
 
NET ASSETS                                                                                
 
 Beginning of period                                       488,162,307     416,241,045    
 
 End of period (including undistributed net investment    $ 533,892,125   $ 488,162,307   
income of $230,506 and $922,675, respectively)                                            
 
</TABLE>
 
FINANCIAL HIGHLIGHTS - CLASS A
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                            
 
Net asset value, beginning of period                    $ 10.830   
 
Income from Investment Operations                                  
 
 Net investment income                                   .268 F    
 
 Net realized and unrealized gain (loss)                 .224      
 
 Total from investment operations                        .492      
 
Less Distributions                                                 
 
 From net investment income                              (.272)    
 
Net asset value, end of period                          $ 11.050   
 
TOTAL RETURN B, C                                        4.61%     
 
RATIOS AND SUPPLEMENTAL DATA                                       
 
Net assets, end of period (000 omitted)                 $ 1,586    
 
Ratio of expenses to average net assets                  .90% A,   
                                                         D         
 
Ratio of net investment income to average net assets     6.09% A   
 
Portfolio turnover rate                                  149%      
 
A ANNUALIZED
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
C TOTAL RETURNS DO NOT INCLUDE THE ONE TIME SALES CHARGE AND FOR PERIODS OF
LESS THAN ONE YEAR ARE NOT ANNUALIZED.
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF CLASS A SHARES) TO
JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - CLASS T
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                             
 
Net asset value, beginning of period                    $ 10.830    
 
Income from Investment Operations                                   
 
 Net investment income                                   .255 F     
 
 Net realized and unrealized gain (loss)                 .233       
 
 Total from investment operations                        .488       
 
Less Distributions                                                  
 
 From net investment income                              (.268)     
 
Net asset value, end of period                          $ 11.050    
 
TOTAL RETURN B, C                                        4.57%      
 
RATIOS AND SUPPLEMENTAL DATA                                        
 
Net assets, end of period (000 omitted)                 $ 12,193    
 
Ratio of expenses to average net assets                  1.00% A,   
                                                         D          
 
Ratio of net investment income to average net assets     5.99% A    
 
Portfolio turnover rate                                  149%       
 
A ANNUALIZED
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
C TOTAL RETURNS DO NOT INCLUDE THE ONE TIME SALES CHARGE AND FOR PERIODS OF
LESS THAN ONE YEAR ARE NOT ANNUALIZED.
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF CLASS T SHARES) TO
JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - CLASS B
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                             
 
Net asset value, beginning of period                    $ 10.830    
 
Income from Investment Operations                                   
 
 Net investment income                                   .234 F     
 
 Net realized and unrealized gain (loss)                 .214       
 
 Total from investment operations                        .448       
 
Less Distributions                                                  
 
 From net investment income                              (.238)     
 
Net asset value, end of period                          $ 11.040    
 
TOTAL RETURN B, C                                        4.20%      
 
RATIOS AND SUPPLEMENTAL DATA                                        
 
Net assets, end of period (000 omitted)                 $ 823       
 
Ratio of expenses to average net assets                  1.65% A,   
                                                         D          
 
Ratio of net investment income to average net assets     5.34% A    
 
Portfolio turnover rate                                  149%       
 
A ANNUALIZED
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
C TOTAL RETURNS DO NOT INCLUDE THE CONTINGENT DEFERRED SALES CHARGE AND FOR
PERIODS OF LESS THAN ONE YEAR ARE NOT ANNUALIZED.
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF CLASS B SHARES) TO
JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - INITIAL CLASS
 
<TABLE>
<CAPTION>
<S>                               <C>                    <C>         <C>         <C>         <C>         
                                  YEARS ENDED JULY 31,                                                   
 
                                  1997                   1996        1995        1994 C      1993        
 
SELECTED PER-SHARE DATA                                                                                  
 
Net asset value, beginning        $ 10.780               $ 10.890    $ 10.580    $ 10.910    $ 10.830    
of period                                                                                                
 
Income from Investment                                                                                   
Operations                                                                                               
 
 Net investment income             .678 D                 .729        .772        .570        .788       
 
 Net realized and                  .391                   (.015)      .325        (.242)      (.007)     
 unrealized gain (loss)                                                                                  
 
 Total from investment             1.069                  .714        1.097       .328        .781       
 operations                                                                                              
 
Less Distributions                                                                                       
 
 From net investment income        (.689)                 (.724)      (.737)      (.588)      (.701)     
 
 From net realized gain            (.110)                 (.100)      -           (.040)      -          
 
 In excess of net realized         -                      -           (.050)      (.030)      -          
gain                                                                                                     
 
 Total distributions               (.799)                 (.824)      (.787)      (.658)      (.701)     
 
Net asset value, end of period    $ 11.050               $ 10.780    $ 10.890    $ 10.580    $ 10.910    
 
TOTAL RETURN B                     10.34%                 6.72%       10.88%      3.13%       7.47%      
 
RATIOS AND SUPPLEMENTAL                                                                                  
DATA                                                                                                     
 
Net assets, end of period         $ 506,113              $ 488,162   $ 416,241   $ 365,801   $ 419,467   
(000 omitted)                                                                                            
 
Ratio of expenses to average       .73%                   .74%        .77%        .79%        .76%       
net assets                                                                                               
 
Ratio of expenses to average       .73%                   .73%        .77%        .79%        .76%       
net assets after expense                                 A                                               
reductions                                                                                               
 
Ratio of net investment income     6.26%                  6.75%       7.37%       6.73%       7.18%      
                                                                                                         
to average net assets                                                                                    
 
Portfolio turnover rate            149%                   221%        329%        563%        278%       
 
</TABLE>
 
A FMR OR THE FUND HAS ENTERED INTO VARYING ARRANGEMENTS WITH THIRD PARTIES
WHO EITHER PAID OR REDUCED A PORTION OF THE CLASS' EXPENSES.
B THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN.
C EFFECTIVE AUGUST 1, 1993, THE FUND ADOPTED STATEMENT OF POSITION 93-2,
"DETERMINATION, DISCLOSURE, AND FINANCIAL STATEMENT PRESENTATION OF INCOME,
CAPITAL GAIN, AND RETURN OF CAPITAL DISTRIBUTIONS BY INVESTMENT COMPANIES."
AS A RESULT, NET INVESTMENT INCOME PER SHARE MAY REFLECT CERTAIN
RECLASSIFICATIONS RELATED TO BOOK TO TAX DIFFERENCES.
D NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
FINANCIAL HIGHLIGHTS - INSTITUTIONAL CLASS
      YEAR ENDED    
      JULY 31,      
 
      1997 E        
 
SELECTED PER-SHARE DATA                                                        
 
Net asset value, beginning of period                                $ 10.830   
 
Income from Investment Operations                                              
 
 Net investment income                                               .263 F    
 
 Net realized and unrealized gain (loss)                             .226      
 
 Total from investment operations                                    .489      
 
Less Distributions                                                             
 
 From net interest income                                            (.279)    
 
Net asset value, end of period                                      $ 11.040   
 
TOTAL RETURN B, C                                                    4.59%     
 
RATIOS AND SUPPLEMENTAL DATA                                                   
 
Net assets, end of period (000 omitted)                             $ 13,177   
 
Ratio of expenses to average net assets                              .75% A,   
                                                                     D         
 
Ratio of expenses to average net assets after expense reductions     .70% A,   
                                                                     G         
 
Ratio of net investment income to average net assets                 6.29% A   
 
Portfolio turnover rate                                              149%      
 
A ANNUALIZED
B TOTAL RETURNS FOR PERIODS OF LESS THAN ONE YEAR ARE NOT ANNUALIZED.
C THE TOTAL RETURN WOULD HAVE BEEN LOWER HAD CERTAIN EXPENSES NOT BEEN
REDUCED DURING THE PERIOD SHOWN (SEE NOTE 5 OF NOTES TO FINANCIAL
STATEMENTS).
D FMR AGREED TO REIMBURSE A PORTION OF THE CLASS' EXPENSES DURING THE
PERIOD. WITHOUT THIS REIMBURSEMENT, THE CLASS' EXPENSE RATIO WOULD HAVE
BEEN HIGHER (SEE NOTE 5 OF NOTES TO FINANCIAL STATEMENTS).
E FOR THE PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF INSTITUTIONAL CLASS
SHARES) TO JULY 31, 1997.
F NET INVESTMENT INCOME PER SHARE HAS BEEN CALCULATED BASED ON AVERAGE
SHARES OUTSTANDING DURING THE PERIOD.
G FMR OR THE FUND HAS ENTERED INTO VARYING ARRANGEMENTS WITH THIRD PARTIES
WHO EITHER PAID OR REDUCED A PORTION OF THE CLASS' EXPENSES (SEE NOTE 5 OF
NOTES TO FINANCIAL STATEMENTS).
NOTES TO FINANCIAL STATEMENTS
For the period ended July 31, 1997
 
   
 
 
1. SIGNIFICANT ACCOUNTING POLICIES.
Fidelity Advisor Mortgage Securities Fund (the fund) is a fund of Fidelity
Income Fund (the trust) and is authorized to issue an unlimited number of
shares. The trust is registered under the Investment Company Act of 1940,
as amended (the 1940 Act), as an open-end management investment company
organized as a Massachusetts business trust. On March 14, 1996, the Board
of Trustees approved the transfer of the fund to the Fidelity Advisor
product line. The Board of Trustees also approved the creation of Class A,
Class T, Class B and Institutional Class shares. Offering of new classes
commenced on March 3, 1997. Prior to March 3, 1997, the fund offered one
class of shares, Fidelity Mortgage Securities Fund ("Initial Class")
(formerly Fidelity Mortgage Securities Fund).
The financial statements have been prepared in conformity with generally
accepted accounting principles which permit management to make certain
estimates and assumptions at the date of the financial statements. The
following summarizes the significant accounting policies of the fund:
SECURITY VALUATION. Securities are valued based upon a computerized matrix
system and/or appraisals by a pricing service, both of which consider
market transactions and dealer-supplied valuations. Securities (including
restricted securities)for which market quotations are not readily available
are valued at their fair value as determined in good faith under
consistently applied procedures under the general supervision of the Board
of Trustees. Short-term securities with remaining maturities of sixty days
or less for which quotations are not readily available are valued at
amortized cost or original cost plus accrued interest, both of which
approximate current value.
INCOME TAXES. As a qualified regulated investment company under Subchapter
M of the Internal Revenue Code, the fund is not subject to income taxes to
the extent that it distributes substantially all of its taxable income for
its fiscal year. The schedule of investments includes information regarding
income taxes under the caption "Income Tax Information."
INVESTMENT INCOME. Interest income, which includes accretion of original
issue discount, is accrued as earned.
EXPENSES. Most expenses of the trust can be directly attributed to a fund.
Expenses which cannot be directly attributed are apportioned between the
funds in the trust.
PREPAID EXPENSES. Fidelity Management & Research Company (FMR) bears all
organizational expenses except for registering and qualifying Class A,
Class T, Class B, and Institutional Class and shares of those classes for
distribution under federal and state securities law. These expenses are
borne by those classes and amortized over one year.
1. SIGNIFICANT ACCOUNTING POLICIES - CONTINUED
DISTRIBUTIONS TO SHAREHOLDERS. Distributions are declared daily and paid
monthly from net investment income. Distributions from realized gains, if
any, are recorded on the ex-dividend date. Income dividends and capital
gain distributions are declared separately for each class.
Income and capital gain distributions are determined in accordance with
income tax regulations which may differ from generally accepted accounting
principles. These differences, which may result in distribution
reclassifications, are primarily due to differing treatments for paydown
gains/losses on certain securities and losses deferred due to wash sales.
The fund also utilized earnings and profits distributed to shareholders on
redemption of shares as a part of the dividends paid deduction for income
tax purposes.
Permanent book and tax basis differences relating to shareholder
distributions will result in reclassifications to paid in capital.
Undistributed net investment income and accumulated undistributed net
realized gain (loss) on investments may include temporary book and tax
basis differences which will reverse in a subsequent period. Any taxable
income or gain remaining at fiscal year end is distributed in the following
year.
SECURITY TRANSACTIONS. Security transactions are accounted for as of trade
date. Gains and losses on securities sold are determined on the basis of
identified cost.
2. OPERATING POLICIES.
JOINT TRADING ACCOUNT. Pursuant to an Exemptive Order issued by the
Securities and Exchange Commission, the fund, along with other affiliated
entities of FMR, may transfer uninvested cash balances into one or more
joint trading accounts. These balances are invested in one or more
repurchase agreements for U.S. Treasury or Federal Agency obligations.
REPURCHASE AGREEMENTS. The underlying U.S. Treasury or Federal Agency
securities are transferred to an account of the fund, or to the Joint
Trading Account, at a bank custodian. The securities are marked-to-market
daily and maintained at a value at least equal to the principal amount of
the repurchase agreement (including accrued interest). FMR, the fund's
investment adviser, is responsible for determining that the value of the
underlying securities remains in accordance with the market value
requirements stated above. 
DELAYED DELIVERY TRANSACTIONS. The fund may purchase or sell securities on
a delayed delivery basis. Payment and delivery may take place a month or
more after the date of the transaction. The price of the underlying
securities and the date when the securities will be delivered and paid for
are fixed at the time the transaction is negotiated. The market values of
the securities purchased or sold on a delayed delivery basis are identified
as such in the fund's schedule of investments. The fund may receive
compensation for
2. OPERATING POLICIES - CONTINUED
DELAYED DELIVERY TRANSACTIONS - CONTINUED
interest forgone in the purchase of a delayed delivery security. With
respect to purchase commitments, the fund identifies securities as
segregated in its custodial records with a value at least equal to the
amount of the commitment. Losses may arise due to changes in the market
value of the underlying securities or if the counterparty does not perform
under the contract. 
RESTRICTED SECURITIES. The fund is permitted to invest in securities that
are subject to legal or contractual restrictions on resale. These
securities generally may be resold in transactions exempt from registration
or to the public if the securities are registered. Disposal of these
securities may involve time-consuming negotiations and expense, and prompt
sale at an acceptable price may be difficult. At the end of the period,
restricted securities (excluding 144A issues) amounted to $2,693,700 or
0.5% of net assets.
3. PURCHASES AND SALES OF INVESTMENTS. 
Purchases and sales of securities, other than short-term securities,
aggregated $790,852,390 and $747,620,591, respectively, of which U.S.
government and government agency obligations aggregated $780,486,825 and
$743,935,902 respectively.
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES. 
MANAGEMENT FEE. As the fund's investment adviser, FMR receives a monthly
fee that is calculated on the basis of a group fee rate plus a fixed
individual fund fee rate applied to the average net assets of the fund. The
group fee rate is the weighted average of a series of rates and is based on
the monthly average net assets of all the mutual funds advised by FMR. The
rates ranged from .1100% to .3700% for the period. The annual individual
fund fee rate is .30%. In the event that these rates were lower than the
contractual rates in effect during the period, FMR voluntarily implemented
the above rates, as they resulted in the same or a lower management fee.
For the period, the management fee was equivalent to an annual rate of .44%
of average net assets.
DISTRIBUTION AND SERVICE PLAN. In accordance with Rule 12b-1 of the 1940
Act, the Trustees have adopted separate distribution plans with respect to
each class of shares (collectively referred to as "the Plans"). Under
certain of the Plans, the class pays Fidelity Distributors Corporation
(FDC), an affiliate of FMR, a distribution and service fee. This fee is
based on the following annual rates of the average net assets of each
applicable class:
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES - CONTINUED
DISTRIBUTION AND SERVICE PLAN - CONTINUED
CLASS A     .15%     
 
CLASS T     .25%     
 
CLASS B     .90% *   
 
* .65% REPRESENTS A DISTRIBUTION FEE AND .25% REPRESENTS A SHAREHOLDER
SERVICE FEE.
For the period, each class paid FDC the following amounts, a portion of
which was paid to securities dealers, banks and other financial
institutions for the distribution of each class' applicable shares, and
providing shareholder support services:
           PAID TO   DEALERS'   
           FDC       PORTION    
 
CLASS A    $ 530     $ 530      
 
CLASS T     2,602     2,602     
 
CLASS B     1,374     1,374     
 
           $ 4,506   $ 4,506    
 
Under the Plans, FMR or FDC may use its resources to pay administrative and
promotional expenses related to the sale of each class' shares. The Plans
also authorize payments to third parties that assist in the sale of each
class' shares or render shareholder support services. 
SALES LOAD. FDC receives a front-end sales charge of up to 4.25% and 3.50%
for selling Class A and Class T shares of the fund, respectively, and the
proceeds of a contingent deferred sales charge levied on Class B share
redemptions occurring within six years of purchase. The Class B charge is
based on declining rates which range from 5% to 1% of the lesser of the
cost of shares at the initial date of purchase or the net asset value of
the redeemed shares, excluding any reinvested dividends and capital gains.
Effective August 1, 1997, Class A's maximum sales charge was increased to
4.75%. 
For the period, FDC received the following sales charge amounts related to
each class, a portion of which is paid to securities, dealers, banks, and
other financial institutions:
           PAID TO    DEALERS'   
           FDC        PORTION    
 
CLASS A    $ 7,090    $ 7,023    
 
CLASS T     9,662      7,492     
 
CLASS B     0          0 *       
 
           $ 16,752   $ 14,515   
 
* WHEN CLASS B SHARES ARE INITIALLY SOLD, FDC PAYS COMMISSIONS FROM ITS OWN
RESOURCES TO DEALERS THROUGH WHICH THE SALES ARE MADE.
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES - CONTINUED
TRANSFER AGENT FEES. Each class of the fund has entered into a separate
transfer, dividend disbursing, and shareholder servicing agent
(collectively referred to as the Transfer Agents) contract with respect to
its shares. The Transfer Agents receive account fees and asset-based fees
that vary according to the account size and type of account of the
shareholders of the respective classes of the fund. FIIOC and FSC pay for
typesetting, printing and mailing of all shareholder reports. For the
period, the following amounts were paid to each transfer agent:
                        TRANSFER   AMOUNT        % OF         
                        AGENT                    AVERAGE      
                                                 NET ASSETS   
 
CLASS A                 FIIOC *    $ 789          .22% **     
 
CLASS T                 FIIOC *     1,513         .14% **     
 
CLASS B                 FIIOC *     881           .57% **     
 
INITIAL CLASS            FSC *      1,028,957     .20%        
 
INSTITUTIONAL CLASS     FIIOC *     2,620         .21% **     
 
                                   $ 1,034,760                
 
* FIDELITY INVESTMENTS INSTITUTIONAL OPERATIONS COMPANY, INC. (FIIOC), AND
FIDELITY SERVICE COMPANY, INC. (FSC), AFFILIATES OF FMR.
** ANNUALIZED
ACCOUNTING FEES. FSC maintains the fund's accounting records. The fee is
based on the level of average net assets for the month plus out-of-pocket
expenses. 
5. EXPENSE REDUCTIONS.
FMR voluntarily agreed to reimburse operating expenses (excluding interest,
taxes, brokerage commissions and extraordinary expenses) above the
following annual rates or range of annual rates of average net assets for
each class:
                       FMR           REIMBURSEME   
                       EXPENSE       NT            
                       LIMITATIONS                 
 
CLASS A                 .90%         $ 10,408      
 
CLASS T                 1.00%         10,413       
 
CLASS B                 1.65%         10,927       
 
INSTITUTIONAL CLASS     .75%          12,094       
 
                                     $ 43,842      
 
5. EXPENSE REDUCTIONS - CONTINUED
In addition, the fund has entered into arrangements with its custodian and
each class' transfer agent whereby credits realized as a result of
uninvested cash balances were used to reduce a portion of expenses. During
the period, the fund's custodian fees were reduced by $8,474 under the
custodian arrangement, and each applicable class' expenses were reduced as
follows under the transfer agent arrangements:
                       TRANSFER    
                       AGENT       
                       INTEREST    
                       CREDITS     
 
INSTITUTIONAL CLASS    $ 629       
 
6. DISTRIBUTIONS TO SHAREHOLDERS.
Distributions to shareholders of each class were as follows:
                                                            
 
                              YEAR ENDED     YEAR ENDED     
                              JULY 31,       JULY 31,       
                              1997 A         1996           
 
CLASS A                                                     
 
From net investment income    $ 21,750       $ -            
 
CLASS T                                                     
 
From net investment income    $ 64,445       $ -            
 
CLASS B                                                     
 
From net investment income    $ 8,241        $ -            
 
INITIAL CLASS                                               
 
From net investment income    $ 32,474,399   $ 31,178,449   
 
From net realized gain         5,039,533      4,055,960     
 
Total                         $ 37,513,932   $ 35,234,409   
                                                            
 
INSTITUTIONAL CLASS                                         
 
From net investment income    $ 80,890       $ -            
 
                              $ 37,689,258   $ 35,234,409   
 
A DISTRIBUTIONS FOR CLASS A, T, B, AND INSTITUTIONAL CLASS ARE FOR THE
PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF SHARES) TO JULY 31, 1997.
7. SHARE TRANSACTIONS.
Share transactions for each class of shares were as follows:
 
<TABLE>
<CAPTION>
<S>                        <C>             <C>             <C>              <C>              
                           SHARES                          DOLLARS                           
 
                           YEAR ENDED      YEAR ENDED      YEAR ENDED       YEAR ENDED       
                           JULY 31,        JULY 31,        JULY 31,         JULY 31,         
 
                           1997 A          1996            1997 A           1996             
 
                                                                                             
 
CLASS A                     141,575         -              $ 1,531,983      $ -              
Shares sold                                                                                  
 
Reinvestment of             1,989           -               21,750           -               
distributions                                                                                
 
Net increase (decrease)     143,564         -              $ 1,553,733      $ -              
 
CLASS T                     1,114,285       -              $ 12,183,453     $ -              
Shares sold                                                                                  
 
Reinvestment of             5,597           -               61,712           -               
distributions                                                                                
 
Shares redeemed             (16,202)        -               (177,848)        -               
 
Net increase (decrease)     1,103,680       -              $ 12,067,317     $ -              
 
CLASS B                     73,891          -              $ 801,025        $ -              
Shares sold                                                                                  
 
Reinvestment of             687             -               7,506            -               
distributions                                                                                
 
Net increase (decrease)     74,578          -              $ 808,531        $ -              
 
INITIAL CLASS               14,636,021      24,584,693     $ 158,564,289    $ 268,954,246    
Shares sold                                                                                  
 
Reinvestment of             2,769,613       2,644,498       29,925,102       28,910,230      
distributions                                                                                
 
Shares redeemed             (16,911,618)    (20,139,279)    (183,183,589)    (219,915,312)   
 
Net increase (decrease)     494,016         7,089,912      $ 5,305,802      $ 77,949,164     
 
INSTITUTIONAL CLASS         1,216,421       -              $ 13,282,379     $ -              
Shares sold                                                                                  
 
Reinvestment of             3,516           -               38,560           -               
distributions                                                                                
 
Shares redeemed             (26,465)        -               (290,779)        -               
 
Net increase (decrease)     1,193,472       -              $ 13,030,160     $ -              
 
</TABLE>
 
A SHARE TRANSACTIONS FOR CLASS A, T, B, AND INSTITUTIONAL CLASS ARE FOR THE
PERIOD MARCH 3, 1997 (COMMENCEMENT OF SALE OF SHARES) TO JULY 31, 1997.
8. REGISTRATION FEES.
For the period, each class paid the following amounts to register its
shares for sale:
                       REGISTRATION   
                       FEES           
 
CLASS A                $ 10,398       
 
CLASS T                 11,098        
 
CLASS B                 10,398        
 
INITIAL CLASS           31,365        
 
INSTITUTIONAL CLASS     12,152        
 
                       $ 75,411       
 
REPORT OF INDEPENDENT ACCOUNTANTS
 
 
To the Trustees of Fidelity Income Fund and the Shareholders of Fidelity
Advisor Mortgage Securities Fund (formerly Fidelity Mortgage Securities
Fund):
In our opinion, the accompanying statement of assets and liabilities,
including the schedule of investments, and the related statements of
operations and of changes in net assets and the financial highlights
present fairly, in all material respects, the financial position of
Fidelity Advisor Mortgage Securities Fund (formerly Fidelity Mortgage
Securities Fund) (a fund of Fidelity Income Fund) at July 31, 1997, the
results of its operations for the year then ended, and the changes in its
net assets and the financial highlights for the periods indicated, in
conformity with generally accepted accounting principles. These financial
statements and financial highlights (hereafter referred to as "financial
statements") are the responsibility of the Fidelity Advisor Mortgage
Securities Fund's management; our responsibility is to express an opinion
on these financial statements based on our audits. We conducted our audits
of these financial statements in accordance with generally accepted
auditing standards which require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial
statements, assessing the accounting principles used and significant
estimates made by management, and evaluating the overall financial
statement presentation. We believe that our audits, which included
confirmation of securities at July 31, 1997 by correspondence with the
custodian and the application of alternative auditing procedures where
securities purchased were not yet received by the custodian, provide a
reasonable basis for the opinion expressed above.
/s/ PRICE WATERHOUSE LLP
PRICE WATERHOUSE LLP
Boston, Massachusetts
September 18, 1997
DISTRIBUTIONS
 
 
The Board of Trustees of Fidelity Advisor Mortgage Securities Fund
(formerly Fidelity Mortgage Securities Fund) voted to pay to shareholders
of record at the opening of business on record date, the following
distributions derived from capital gains realized from sales of portfolio
securities, and dividends derived from net investment income:
 PAY DATE RECORD DATE DIVIDENDS CAPITAL GAINS
Class A 9/8/97 9/5/97 - $.08
Class T 9/8/97 9/5/97 - $.08
Class B 9/8/97 9/5/97 - $.08
Initial Class 9/8/97 9/5/97 - $.08
Institutional Class 9/8/97 9/5/97 - $.08
A total of 0.01% of the dividends distributed during the fiscal year was
derived from interest on U.S. Government securities which is generally
exempt from state income tax.
The fund will notify shareholders in January 1998 of the applicable
percentage for use in preparing 1997 income tax returns.
 
 
 
 
 
 
INVESTMENT ADVISER
Fidelity Management & Research Company
Boston, MA
INVESTMENT SUB-ADVISERS
Fidelity Management & Research 
 (U.K.) Inc., London, England
Fidelity Management & Research 
 (Far East) Inc., Tokyo, Japan
OFFICERS
Edward C. Johnson 3d, President
Robert C. Pozen, Senior Vice President
Fred L. Henning, Jr., Vice President
Dwight D. Churchill, Vice President
Kevin Grant, Vice President
Arthur S. Loring, Secretary
Richard A. Silver, Treasurer
John H. Costello, Assistant Treasurer
Leonard M. Rush, Assistant Treasurer
BOARD OF TRUSTEES
Ralph F. Cox *
Phyllis Burke Davis *
Robert M. Gates *
Edward C. Johnson 3d
E. Bradley Jones *
Donald J. Kirk *
Peter S. Lynch
Marvin L. Mann *
William O. McCoy *
Gerald C. McDonough *
Robert C. Pozen
Thomas R. Williams *
ADVISORY BOARD
J. Gary Burkhead
GENERAL DISTRIBUTOR
Fidelity Distributors Corporation
Boston, MA
TRANSFER AND SHAREHOLDER
SERVICING AGENT
Fidelity Investments Institutional Operations Company, Inc.
Boston, MA
CUSTODIAN
The Bank of New York
New York, NY
FOCUS FUNDS
Fidelity Advisor Consumer 
Industries Fund
Fidelity Advisor Cyclical 
Industries Fund
Fidelity Advisor Financial 
Services Fund
Fidelity Advisor Health Care Fund
Fidelity Advisor Natural 
Resources Fund
Fidelity Advisor Technology Fund
Fidelity Advisor Utilities Growth Fund
GROWTH FUNDS
Fidelity Advisor Overseas Fund
Fidelity Advisor TechnoQuant(trademark) 
Growth Fund
Fidelity Advisor Mid Cap Fund
Fidelity Advisor Equity Growth Fund
Fidelity Advisor Growth
Opportunities Fund
Fidelity Advisor Strategic
Opportunities Fund
Fidelity Advisor Large Cap Fund
GROWTH AND INCOME FUNDS
Fidelity Advisor Growth & Income Fund
Fidelity Advisor Equity Income Fund
Fidelity Advisor Balanced Fund
TAXABLE INCOME FUNDS
Fidelity Advisor Emerging Markets Income Fund
Fidelity Advisor High Yield Fund
Fidelity Advisor Strategic Income Fund
Fidelity Advisor Mortgage
Securities Fund
Fidelity Advisor Government Investment Fund
Fidelity Advisor Intermediate Bond Fund
Fidelity Advisor Short Fixed-Income Fund
MUNICIPAL FUNDS
Fidelity Advisor High Income
Municipal Fund
Fidelity Advisor Municipal Bond Fund
Fidelity Advisor Intermediate Municipal Income Fund
Fidelity Advisor Short-Intermediate Municipal Income Fund
STATE MUNICIPAL FUNDS
Fidelity Advisor California Municipal Income Fund
Fidelity Advisor New York Municipal Income Fund
MONEY MARKET FUNDS
Prime Fund
Treasury Fund
Tax-Exempt Fund
 
(REGISTERED TRADEMARK)



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