PARNASSUS FUND
497, 1997-12-09
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<PAGE>

                               THE PARNASSUS FUND

                              Cross Reference Index

<TABLE>
<CAPTION>

                    ITEM                              REFERENCE
                    ----                              ---------
<S>        <C>                                    <C>

Part A.   Information Required in a Prospectus





Item 1.   Cover Page                              Cover Page (p.1)
Item 2.   Synopsis; Fee Information               Fund Expenses (p.2)
Item 3.   Financial Highlights                    Financial Highlights (p.3)
Item 4.   General Description of Registrant       Investment Objective (p.4)
                                                  Principal Investment Restrictions (p.6);
                           General Information (p.15)
Item 5.   Management of the Fund                  Management (p.7); The Adviser (p.8)
                           General Information (p.15)
Item 6.   Capital Stock and other Securities      Distributions and Taxes (p.13);
                          How to Purchase Shares (p.9)
                                Management (p.7)
Item 7.   Purchase of Securities Being            How to Purchase Shares (p.9)
          Offered
Item 8.   Redemption or Repurchase                How to Redeem Shares (p.12)
   
Item 9.   Legal Proceedings                       None
    




Part B    Information Required in a Statement of Additional Information

Item 10.  Cover Page                              Cover Page (B-1)
Item 11.  Table of Contents                       Table of Contents (B-1)
Item 12.  General Information & History           General (B-8)
Item 13.  Investment Objective & Policies         Investment Objectives  & Policies (B-2)
Item 14.  Management of the Registrant            Management (B-4)
Item 15.  Control Person & Principal Holders      None
                   of Securities
Item 16.  Investment Advisory & Other             The Adviser (B-5)
                   Services
Item 17.  Brokerage Allocation & Other            The Adviser (B-5); Portfolio
                   Practices                      Transactions and Brokerage (B-6)
Item 18.  Capital Stock & Other Securities        General (B-8)
Item 19.  Purchase, Redemption & Pricing of       Net Asset Value (B-6)
                   Securities Being Offered
Item 20.  Tax Status                              Prospectus (p.13)
Item 21.  Underwriters                            Portfolio Transactions and Brokerage (B-5)
Item 22.  Calculation of Performance Data         Performance Advertising and Calculation of Total
                                                  Return and  Yield (B-4); Prospectus (p.14)
Item 23. Financial Statements                     Financial Statements (B-9)
</TABLE>

- --------------------------------------------------------------------------------
<PAGE>
THE PARNASSUS FUND

   
PROSPECTUS-MAY 1, 1997 AS REVISED DECEMBER 8, 1997
    

The Parnassus Fund (the "Fund") is a diversified open-end management  investment
company, managed by Parnassus Investments (the "Adviser").  The Fund's principal
investment  objective is to achieve long-term growth of capital;  current income
is a secondary  objective.  The Adviser  chooses  the Fund's  investments  using
social as well as  financial  criteria.  In  general,  the  Adviser  will choose
investments that it believes will have a positive social impact.

This Prospectus  provides you with the basic  information you should know before
investing in the Fund.  You should read it and keep it for future  reference.  A
Statement  of  Additional   Information  (SAI)  dated  May  1,  1997  containing
additional  information  about the Fund has been filed with the  Securities  and
Exchange  Commission and is  incorporated by reference in this Prospectus in its
entirety.  You may  obtain a copy of the  Statement  of  Additional  Information
without charge by calling or writing the Fund at the address listed above.

TABLE OF CONTENTS
- --------------------------------------------------------------------------------
Fund Expenses                      2        How to Purchase Shares      9
Financial Highlights               3        How to Redeem Shares       12
The Legend of Mt. Parnassus        3        Distributions and Taxes    13
Investment Policy                  4        Performance Information    14
Principal Investment Restrictions  6        General Information        15
Management                         7

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE  COMMISSION OR ANY STATE  SECURITIES  COMMISSION NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.


FUND EXPENSES
- --------------------------------------------------------------------------------
The following table  illustrates all expenses and fees that a shareholder of the
Fund will incur.


SHAREHOLDER TRANSACTION EXPENSES
- --------------------------------------------------------------------------------
Maximum Sales Load Imposed on Purchases.....................3.5%
Maximum Sales Load Imposed on Reinvested Dividends..........None
Redemption Fees.............................................None

ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
- --------------------------------------------------------------------------------
Management Fees.............................................0.68%
12b-1 Fees..................................................None
Other Operating Expenses....................................0.50%
     Transfer Agent & Accounting Fees+...........0.25%
     Shareholder Service Fees....................0.10%
     Reports to Shareholders.....................0.06%
Total Fund Operating Expenses...............................1.18%

The purpose of this table is to assist the investor in understanding the various
costs  and  expenses  that  an  investor  in the  Fund  will  bear  directly  or
indirectly. The following example illustrates the expenses that you would pay on
a $1000  investment  over various time periods  assuming (1) a 5% annual rate of
return and (2) redemption at the end of each time period.  As noted in the table
above, the Fund charges no redemption fees of any kind.

- --------------------------------------------------------------------------------
         ONE YEAR        THREE YEARS       FIVE YEARS       TEN YEARS
- --------------------------------------------------------------------------------
           $47               $71              $98             $173

<PAGE>
The  expenses  shown  above are  cumulative--not  ones you pay every  year.  For
example, the $173 figure for ten years is not the annual expense figure, but the
total cumulative  expenses a shareholder would have paid for the entire ten-year
period. This example should not be considered a representation of past or future
expenses or  performance.  Actual  expenses  may be greater or lesser than those
shown.  For a  fuller  description  of  expenses,  see  pages  8  and 9 of  this
prospectus.

From time to time, the Fund may direct  brokerage  commissions to firms that may
pay certain expenses of the Fund subject to "best  execution." This is done only
when brokerage  costs are reasonable and the Fund  determines that the reduction
of expenses is in the best interest of the shareholders. See page B-6 of the SAI
for more  information.  Since this happens on an irregular  basis, the effect on
the expense ratios cannot be calculated with any degree of certainty.

+The Fund compensates  Parnassus  Investments for its services as Transfer Agent
and  Accounting  Agent in the form of fixed  fees,  which are not  based  upon a
percentage of the average net assets of the Fund.


<TABLE>
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
Selected  data for each share of capital  stock  outstanding,  total  return and
ratios/supplemental  data for each of the ten years in the period ended December
31 are as follows: <CAPTION>
                                   1996      1995      1994      1993      1992      1991      1990      1989      1988      1987
<S>                                <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>
                                   -------------------------------------------------------------------------------------------------
Net asset value at beginning of
period                             31.77     32.82     31.81     29.94     23.53     16.09     20.62     20.46     16.16     18.09
                                   -------------------------------------------------------------------------------------------------
Income From Investment Operations:
Net investment income(loss)        (0.06)     0.15      2.73      0.27      0.01      0.06      0.16      0.27     (0.05)    (0.04)
Net realized and unrealized gain
(loss) on securities                3.77      0.07      1.00      4.84      8.60      8.29     (4.52)     0.30      6.90     (1.19)
                                   -------------------------------------------------------------------------------------------------
 Total from Investment Operations   3.71      0.22      3.73      5.11      8.61      8.35     (4.36)     0.57      6.85     (1.23)
                                   -------------------------------------------------------------------------------------------------
Distributions:
Dividends from net investment
income                                .-     (0.16)    (0.47)    (0.25)    (0.04)    (0.06)    (0.17)    (0.18)       .-     (0.03)
Distributions from net realized
gain on securities                 (1.09)    (1.11)    (2.25)    (2.99)    (2.16)    (0.85)       .-     (0.23)    (2.55)    (0.67)
                                   -------------------------------------------------------------------------------------------------
    Total Distributions            (1.09)    (1.27)    (2.72)    (3.24)    (2.20)    (0.91)    (0.17)    (0.41)    (2.55)    (0.70)
                                   -------------------------------------------------------------------------------------------------
Net asset value at end of period   34.39     31.77     32.82     31.81     29.94     23.53     16.09     20.62     20.46     16.16
                                   =================================================================================================
Total Return *                     11.68%     0.62%    11.98%    17.31%    36.80%    52.56%   (21.16%)    2.85%    42.44%    (7.95%)

Ratios/Supplemental Data:
Ratio of expenses to average net
assets                              1.10%     1.02%     1.14%     1.26%     1.47%     1.51%     1.77%     1.65%     2.15%     2.13%
Ratio of net investment
income(loss)
to average net assets              (0.17%)    0.54%     0.43%     0.13%     0.02%     0.26%     0.87%     1.21%    (0.49%)   (0.24%)
Portfolio turnover                 59.60%    29.10%    28.10%    21.00%    32.80%    24.61%    38.25%    11.45%    32.34%    31.69%
Average commission per share **    $0.033       .-       .-        .-        .-        .-        .-        .-        .-        .-
Net Assets,End of Period (000's)  $268,235  $259,133  $160,994  $98,774   $56,237   $31,833   $20,738   $23,048   $10,863    $5,374
<FN>
* Total return figures do not adjust for the sales charge.
** Average commission rate is calculated for the periods beginning on or after January 1, 1996.
</FN>
</TABLE>

Note:  This  information is taken from audited  financial  statements  that were
published in the Fund's annual reports and was audited by Deloitte & Touche LLP.

<PAGE>

THE LEGEND OF MT. PARNASSUS
- --------------------------------------------------------------------------------

Parnassus is a mountain in central  Greece whose twin peaks rise more than 8,000
feet above sea level. A dense forest covers the slopes of Mt. Parnassus, but the
summit is rocky and, most of the time,  covered with snow.  The mountain plays a
prominent role in Greek mythology because on its southern slope, overlooking the
Gulf of Corinth, lies Delphi, site of the famous oracle.  Originally, the oracle
belonged to Gaia, the earth goddess.  Later,  Mother Earth was worshipped  under
the name  Delphyne and she  controlled  the oracle  along with her  serpent-son,
Python, and her  priestess-daughters who controlled the rites.  Eventually,  the
Greek god, Apollo,  took over the site, doing away with Python,  but keeping the
priestesses.

The most "Greek" of the gods, Apollo represented  enlightenment and civilization
and presided over the  establishment of cities.  Identified with the development
of Greek codes of law,  Apollo was also the god of light, a master  musician and
skilled  archer.  Legend has it that  Python,an  enormous  serpent raised in the
caves of Mt. Parnassus, controlled the site of Delphi. When Apollo, representing
civilization,  challenged  Python,  representing  anarchy,  there  was a  heroic
struggle,  but the god finally  killed the dragon by  shooting a hundred  arrows
into its body.

There were many oracles in ancient Greece, but only the one at Delphi achieved a
record  of  reliability.  Apollo's  temple  at Delphi  soon  became an  enormous
storehouse of treasures that were gifts of those who had consulted the oracle.

The oracle  communicated  through the voice of a priestess  who spoke while in a
trance.  The priests of Delphi,  who  interpreted  the sayings of the priestess,
obtained a great deal of knowledge  and  information  from talking to the people
who came from all over the Greek world to consult at the shrine of Apollo. Quite
often, the oracle went against the prevailing wisdom of the time and frequently,
the proud were humbled and the lowly were justified.


INVESTMENT POLICY
- --------------------------------------------------------------------------------

Objective

The Fund's  investment  objective is to achieve long-term growth of capital with
current income as a secondary objective.  The Fund will attempt to achieve these
objectives by investing  primarily in "equity  securities" based on the criteria
described  below.  "Equity  securities"  consist of common  stocks or securities
having the characteristics of common stocks which include convertible  preferred
stocks,  convertible  debt  securities  or warrants (up to 5% of total  assets).
There can be no assurance that the Fund will achieve its objective.

The Fund's  portfolio will  emphasize  equity  securities  issued by established
companies. Established companies are defined as those that (1) are traded on the
New York Stock  Exchange,  (2) are listed as a "Fortune  500" company or (3) are
traded  either on the  American  Stock  Exchange or the NASD's  National  Market
System and are mature (more than ten years of  continuous  operation)  and pay a
dividend.  The Fund may, however,  invest in equity securities of companies that
may not pay a dividend  and may be traded  over-the-counter;  usually,  not more
than 30% of the Fund's  assets will be so invested.  Securities  of companies in
this 30% category may not have the same liquidity as those of larger  companies.
In general, the Fund will not invest in companies with less than $150 million in
annual sales.

Policies

The Fund's Adviser uses three basic criteria in selecting equity  securities for
the Fund's portfolio:

1)   the stock must be selling at a depressed  price compared to the market as a
     whole and  compared  to its price  history  for the past five  years (see I
     below);

2)   the issuer must be  financially  sound with good  prospects  for the future
     (see II below); and

3)   the  issuer  must  have,  in  the  Adviser's  judgment,   enlightened  and
     progressive management (see III below).

<PAGE>

For a stock to be purchased by the Fund, it must meet all of the above criteria.
How the Adviser determines if a stock meets these criteria is discussed below.

     I.  The  Contrarian  Principle.  The first  criterion  listed above can be
         called  "contrarian"  since it leads to the purchase of stocks that are
         out of favor with the investment  community.  The Adviser  expects each
         stock selected to have:

         1) a market price whose ratio to book value per share is lower than its
            historical average over the past five years;
         2) a market  price  that  has  declined  to 65% or less of the  highest
            market price achieved during the past five years; and
         3) a  market  price  whose  ratio  to sales  per  share  is  below  its
            historical average over the past five years.

The  ratios  given  above are not  absolute  limits,  but  represent  guidelines
followed by the Adviser.  A stock may be selected for the Fund's  portfolio even
if it does not meet all of the above tests,  but will not be selected if it does
not meet any of such tests.

     II.  FINANCIAL CONSIDERATIONS. The Adviser will apply financial criteria to
          each  stock  that  meets its  "contrarian"  standards  in an effort to
          determine  whether  the  issuer  is  financially  sound  and has  good
          prospects  for the future.  The Adviser will  consider  the  following
          factors in determining whether or not a company is financially sound:

          1) financial strength,  in the form of net assets, as determined by an
             analysis of the company's balance sheet;

          2) total annual sales of the company  compared to its sales five years
             ago;

          3) outlook for future earnings;

          4) the company's net cash flow; and

          5) dividend and earnings history for the past ten years.

     III. "RENAISSANCE"  FACTORS.  There are also five qualitative factors that,
          in the Adviser's  opinion,  constitute  "enlightened  and  progressive
          management"  of  issuers.   These   factors--known   as  "Renaissance"
          Factors--are:

          1) the quality of the company's products and services;
          2) the  degree to which the  company is  marketing-oriented  and stays
             close to the customer;
          3) the  sensitivity  of  the  company  to the  communities  where  it
             operates;
          4) the company's treatment of its employees; and
          5) the company's ability to innovate and respond well to change.

Although the Fund will  emphasize  positive  reasons for investing in a company,
our operating policies call for excluding  companies that manufacture alcohol or
tobacco  products  or are  involved  with  gambling.  The Fund also  screens out
weapons contractors and those that generate electricity from nuclear power.

On the positive  side,  the Fund looks for a number of important  attributes  to
determine  if  a  firm  is  a  "Renaissance"   company.  These  include  a  good
environmental  protection  policy,  an effective  equal  employment  opportunity
program,  a  record  of civic  commitment  and a  history  of  ethical  business
dealings.


Other Policies

Under  normal  circumstances,  the Fund will have  virtually  all of its  assets
invested in equity securities.  However,  for temporary defensive  purposes,  or
pending the investment of the proceeds from sales of shares of the Fund or sales
of  portfolio  securities,  all or part of the assets may be  invested  in money
market  instruments or in investment grade,  long-term debt securities,  and the
Fund may also enter into  repurchase  agreements,  which  basically  involve the
purchase  by the Fund of debt  securities  and their  resale  at an  agreed-upon
price.  While  the  Fund  intends  to  be  fully  "collateralized"  as  to  such
agreements,  and the  collateral  will be marked to market daily,  if the person
obligated to repurchase from the Fund defaults or enters  bankruptcy,  there may
be delays and expenses in  liquidating  the  securities,  a possible  decline in
their value and  potential  loss of interest.  See the  Statement of  Additional
Information for further details.

<PAGE>

PRINCIPAL INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------

The Fund is subject to certain  investment  restrictions  which are  fundamental
policies  that  cannot be  changed  without  the  approval  of the  holders of a
majority of the Fund's  outstanding  voting  securities.  The Fund's  investment
objective is such a policy,  as are restrictions  that provide that the Fund may
not: (i) invest more than 5% of the value of its net assets in securities of any
one issuer  (other than  obligations  issued or  guaranteed by the United States
Government, its agencies or its instrumentalities);  (ii) purchase more than 10%
of the  outstanding  voting  securities or of any class of securities of any one
issuer;  (iii)  invest  more  than  25% of the  value  of its  total  assets  in
securities  of issuers in any one  industry;  or (iv) borrow  money  except from
banks for  temporary or emergency  purposes in amounts not  exceeding 10% of the
Fund's total assets.  (The Fund will not make additional  investments while such
borrowings  are  outstanding.)  It is  possible  for the  Fund  to make  limited
investments  in  the  securities  of  other  investment  companies.   Additional
information  about  the  Fund's  investment  restrictions  is  contained  in the
Statement of Additional Information.

It is the position of the Securities and Exchange  Commission  (and an operating
although  not a  fundamental  policy  of  the  Fund)  that  open-end  investment
companies  such as the Fund should not make certain  investments  if  thereafter
more  than 15% of the  value of  their  net  assets  would be so  invested.  The
investments  included  in this 15% limit are:  (i) those  which are  restricted,
i.e.,  those which cannot freely be sold for legal reasons  (which the Fund does
not expect to own);  (ii) fixed time deposits  subject to  withdrawal  penalties
(other than overnight deposits);  (iii) re-purchase agreements having a maturity
of more than seven days; and (iv)  investments  for which market  quotations are
not readily available. However, the 15% limit does not include obligations which
are payable at principal  amount plus accrued  interest  within seven days after
purchase. 


MANAGEMENT
- --------------------------------------------------------------------------------

The Fund's Board of Trustees decides on matters of general policy and supervises
the activities of the Fund's Adviser.  The Fund's officers conduct and supervise
the daily business  operations of the Fund. The Trustees and officers are listed
below,  together with their principal  occupations during at least the past five
years.

Jerome L.  Dodson*,  President  and  Trustee,  is also  President  of  Parnassus
Investments.  From  1975 to 1982,  Mr.  Dodson  served  as  President  and Chief
Executive Officer of Continental  Savings and Loan Association in San Francisco.
From 1982 to 1984,  he was  President  of Working  Assets Money Fund and he also
served as a Trustee  from 1988 to 1991.  He is a graduate of the  University  of
California at Berkeley and of Harvard  University's  Graduate School of Business
Administration  where he  concentrated  in  finance.  Mr.  Dodson is the  Fund's
portfolio manager.

Gail L. Horvath, Trustee, is co-owner and director of new product development at
Just  Desserts,  a San  Francisco-based  bakery and cafe. A  co-founder  of Just
Desserts, her experience includes market research,  product planning and product
development.  For four years, she served as a director of Continental Savings of
America. She is a graduate of Ohio State University.


David L. Gibson,  Trustee,  is an attorney in private  practice  specializing in
taxation and personal  financial  planning.  From 1973 to 1984,  he was with the
Crown  Zellerbach  Corporation  where he served as tax counsel  and,  later,  as
Director of Public Affairs. Mr Gibson is active in civic affairs and his special
interests  include  senior  citizens and  environmental  protection.  He holds a
bachelor's  degree  in  business   administration   from  Virginia   Polytechnic
Institute,  an MBA from Golden Gate  University,  a JD from  Washington  and Lee
University and an LLM from William and Mary.

Howard Fong,  Vice President and Treasurer,  is also Vice President of Parnassus
Investments.  Mr.  Fong  began his  career as an  examiner  with the  California
Department of Savings and Loan. In 1979, he joined Continental  Savings where he
worked until 1988,  most recently as Senior Vice  President and Chief  Financial
Officer.  He joined the  Parnassus  Fund in 1988.  Mr. Fong  graduated  from San
Francisco State University with a degree in business administration.

<PAGE>

Richard D. Silberman, Secretary, is an attorney specializing in business law. He
has been general  counsel to the Parnassus Fund since its inception.  He holds a
bachelor's degree in business administration from the University of Wisconsin, a
Bachelor of Laws, also from the University of Wisconsin and a Master of Law from
Stanford University. He is a member of both the Wisconsin and California Bars.

*Denotes "interested trustee" as defined in the Investment Company Act of 1940.


The Adviser

Parnassus  Investments  (the  "Adviser"),  One  Market-Steuart  Tower #1600, San
Francisco,  California 94105 acts as investment  adviser to the Fund, subject to
the control of the Fund's Board of Trustees, and as such supervises and arranges
the  purchase and sale of  securities  held in the  portfolio  of the Fund.  The
Adviser has had twelve years experience managing the Fund.

For its  services,  the  Fund,  under  an  Investment  Advisory  Agreement  (the
"Agreement") between the Fund and the Adviser,  pays the Adviser a fee, computed
and payable at the end of each month, at the following annual percentages of the
Fund's average daily net assets: 1.00% of the first $10 million in assets; 0.75%
of the amount above $10 million in assets up to $30 million; 0.70% of the amount
above $30 million up to $100 million;  0.65% of the amount above $100 million up
to $200  million;  0.60% of the amount  above $200  million up to $400  million;
0.55% of the amount  above $400  million  up to $600  million;  and 0.50% of the
amount  above $600  million.  For 1996,  the Fund paid the Adviser  0.68% of its
average net assets.

In addition to the fee payable to the Adviser,  the Fund is responsible  for its
operating   expenses,   including:   (i)  interest  and  taxes;  (ii)  brokerage
commissions;  (iii) insurance  premiums;  (iv)  compensation and expenses of its
Trustees  other  than those  affiliated  with the  Adviser;  (v) legal and audit
expenses;  (vi) fees and expenses of the Fund's  custodian,  transfer  agent and
accounting  services  agent;  (vii)  expenses  incident  to the  issuance of its
shares,  including  issuance on the payment of, or reinvestment  of,  dividends;
(viii) fees and expenses  incident to the  registration  under  Federal or state
securities laws of the Fund or its shares; (ix) expenses of preparing,  printing
and mailing  reports and notices and proxy material to shareholders of the Fund;
(x)  all  other   expenses   incidental  to  holding   meetings  of  the  Fund's
shareholders;  (xi) dues or  assessments of or  contributions  to the Investment
Company  Institute and the Social  Investment  Forum;  (xii) such  non-recurring
expenses as may arise,  including  litigation  affecting  the Fund and the legal
obligations  which the Fund may have to indemnify its officers and Trustees with
respect thereto. In allocating brokerage  transactions,  the investment advisory
agreement  states that the Adviser may consider  research  provided by brokerage
firms or whether  those firms sold  shares of the Fund.  See page B-6 of the SAI
for more information on brokerage and portfolio transactions.
   
(Paragraphs deleted)
    

HOW TO PURCHASE SHARES
- --------------------------------------------------------------------------------

Because the sales  charge on its shares is lower than that charged by many other
investment  companies which impose a sales charge, the Parnassus Fund is what is
commonly called a "low load" fund.

Shares of the Fund may be purchased by sending a check  directly to the Adviser,
which is also the Fund's  principal  underwriter  ("Distributor")  (see  "Direct
Purchase of Shares" below), or by ordering shares through a broker-dealer  which
is a member of the National  Associations  of Securities  Dealers,  Inc. and has
signed  a sales  agreement  with  the  Distributor  (see  "Purchases  through  a
Broker-Dealer" below). The purchase price per share is the offering price, which
is the net asset value per share as of the next  calculation  after the order is
placed, plus a sales charge calculated as follows: 
<PAGE>
<TABLE>

<CAPTION>
    SALES CHARGE AS A PERCENTAGE OF
- -----------------------------------------------------------------------------------------------------------------
                                                                                                DEALER DISCOUNT
                                                         OFFERING              NET ASSET        AS A PERCENTAGE
     AMOUNT OF TRANSACTION AT OFFERING PRICE              PRICE                 VALUE           OF OFFERING PRICE
- -----------------------------------------------------------------------------------------------------------------
<S>                                                      <C>                   <C>              <C>
     Less than $15,000                                     3.5%                 3.63                3.5%
     $15,000 but less than $25,000                         3.0                  3.09                3.0%
     $25,000 but less than $50,000                         2.5                  2.56                2.5%
     $50,000 but less than $100,000                        2.0                  2.04                2.0%
     $100,000 but less than $250,000                       1.5                  1.52                1.5%
     $250,000 but less than $500,000                       1.0                  1.01                1.0%
     $500,000 but less than $1,000,000                     0.5                  0.50                0.5%
     $1,000,000 or more                                                    No Sales Charge
</TABLE>


Investors in the following  categories may combine their purchases into a single
transaction to qualify for a reduced sales charge: 1) an individual,  his or her
spouse and their children  purchasing for his, her or their own account and 2) a
trustee  or other  fiduciary  purchasing  for a single  trust  estate  or single
fiduciary account.

Certain  categories of people may invest in the Parnassus  Fund without paying a
sales charge.  These categories include Trustees,  officers and employees of the
Parnassus Fund and the Fund's  investment  adviser,  representatives  registered
with  the  National  Association  of  Securities  Dealers,   custodial  accounts
qualifying  under Section 403(b) or Section 401(k) of the Internal Revenue Code,
pension,  profit-sharing or other employee benefit plans qualified under section
401 of the  Internal  Revenue  Code and  discretionary  accounts  of bank  trust
departments  and  registered  investment  advisers.  Investors  may be charged a
transaction  or other fee in connection  with  purchases or  redemptions of Fund
shares at net asset value (i.e.  without a sales  charge) on their  behalf by an
investment adviser, a brokerage firm or other financial institution.



Statement of Intention (Letter of Intent)

A single  investor  may also obtain the  reduced  sales  charges  shown above by
completing  a Statement  of  Intention.  By  expressing  in writing an intent to
invest  $15,000 or more within a thirteen  month period,  a single  investor may
also obtain the reduced  sales  charges  shown above.  You can obtain a form for
this  purpose by writing or calling the Fund or you can write your own letter of
intent.

While a shareholder is not obligated to fulfill a letter of intent,  if the goal
is not met, the  purchaser is required to pay the  difference  between the sales
charge  actually  paid and the one that  would  otherwise  have  been due had no
Statement of Intention been signed.

Rights of Accumulation

A single  investor may also obtain a cumulative  quantity  discount  (known as a
right of  accumulation)  by adding his or her current  purchase to the net asset
value (at the close of business on the  previous  day) of all shares  previously
purchased and still owned in the Fund. The applicable sales charge is then based
on this total.  A  shareholder  may also add the total of any  investment in the
Parnassus  Income Fund to the Parnassus  Fund total for purposes of  calculating
the sales charge. To benefit from any right of accumulation (ROA), a shareholder
must identify any ROA links to other accounts and communicate these links to the
Fund's shareholder service staff.

Other Information

The Fund also offers additional  services to investors,  including plans for the
systematic  investment  and  withdrawal  of money as well as IRA and SEP  plans.
Information about these plans is available from the Distributor.

The  minimum  initial  investment  in the Fund is $2,000  except for  retirement
plans,  accounts opened pursuant to Uniform Gift to Minor's Act (UGMA), and PAIP
accounts which have a $500 minimum initial  investment.  The minimum  additional
investment is $50. The distributor reserves the right to reject any order.

<PAGE>

Direct Purchase of Shares

An investor should complete and mail an application  form and send it along with
a check  payable  to the  Parnassus  Fund.  It should be sent to the Fund at the
following address:

The Parnassus Fund
One Market-Steuart Tower #1600
San Francisco, California 94105

An initial  investment  must be at least $2,000 except for PAIP  accounts,  UGMA
accounts,  and certain employee benefit plans or tax qualified  retirement plans
(e.g.  IRA,  SEP)  which have a $500  minimum.  Subsequent  investments  for all
accounts must be at least $50. With subsequent investments,  shareholders should
write the name and number of the account on the check.  Checks do not need to be
certified,  but are accepted  subject to collection  and must be drawn in United
States dollars on United States banks.  The investment  will be processed at the
public  offering price  calculated on the same business day it is received if it
arrives before 1:00 pm San Francisco time;  otherwise,  it will be processed the
next business day.


Purchases Via Parnassus Automatic Investment Plan (PAIP)

After making an initial investment to open an account,  a Parnassus  shareholder
may  purchase  additional  shares  ($50  minimum)  via the  Parnassus  Automatic
Investment  Plan  (PAIP).  On a monthly  or  quarterly  basis,  your  money will
automatically  be transferred from your bank account to your Fund account on the
day of your choice (3rd or 18th day of the month).  You can elect this option by
filling out the PAIP section on the new account form.  For further  information,
call the Fund and ask for the free  brochure  called  "Automatic  Investing  and
Dollar-Cost Averaging".


Purchases Through A Broker-Dealer


Broker-dealers may place orders on behalf of clients by calling the Distributor.
If a client  places  an  order  with a  broker-dealer  prior  to 1:00  p.m.  San
Francisco  time on any business day (see below) and the  broker-dealer  forwards
the order to the Distributor  prior to 1:00 p.m. San Francisco time on that day,
the order will be  processed  at the offering  price  calculated  that same day.
Otherwise, the offering price will be calculated as of the close of the NYSE the
next business day. The  broker-dealer is responsible for placing purchase orders
promptly with the Distributor  and for forwarding  payment within three business
days.

Net Asset Value

The Fund's net asset value per share is determined as of 4:00 p.m.  Eastern time
on each day that the New York  Stock  Exchange  is open for  trading  ("business
day") and on any other  day that  there is a  sufficient  degree of  trading  in
investments held by the Fund to affect the net asset value,  except that the net
asset value may not be determined on any day that there are no  transactions  in
shares of the Fund.  The net  asset  value per share is the value of the  Fund's
assets,  less its  liabilities,  divided  by the  number  of  shares of the Fund
outstanding. The value of the Fund's portfolio securities is the market value of
such  securities.   However,  securities  and  other  assets  for  which  market
quotations  are not  readily  available  are  valued  at  their  fair  value  as
determined  in good faith by the Adviser  under  procedures  established  by and
under  the  general  supervision  and  responsibility  of the  Fund's  Board  of
Trustees. See the Statement of Additional Information for details.

<PAGE>

Telephone Transfers

Shareholders who elect to use telephone transfer  privileges must so indicate on
the  account  application  form.  The  telephone  transfer  privilege  allows  a
shareholder to effect  exchanges  from the Fund into an  identically  registered
account in another one of the Parnassus Funds (e.g. The Parnassus  Income Fund).
Neither  the  Fund  nor  Parnassus  Investments  will be  liable  for  following
instructions communicated by telephone reasonably believed to be genuine; a loss
to the shareholder may result due to an unauthorized  transaction.  The Fund and
Parnassus   Investments  will  employ  reasonable  procedures  to  confirm  that
instructions  communicated by telephone are genuine.  Procedures may include one
or more of the following:  recording all telephone  calls  requesting  telephone
exchanges,   verifying   authorization  and  requiring  some  form  of  personal
identification  prior to acting upon  instructions  and sending a statement each
time a telephone  exchange is made.  The Fund and Parnassus  Investments  may be
liable for any losses due to  un-authorized or fraudulent  instructions  only if
such reasonable  procedures are not followed.  Of course,  shareholders  are not
obligated in any way to authorize telephone transfers and may choose to make all
exchanges  in  writing.  The  telephone  exchange  privilege  may be modified or
discontinued  by  the  Fund  at  any  time  upon  60  days'  written  notice  to
shareholders.


HOW TO REDEEM SHARES
- --------------------------------------------------------------------------------

You may sell or redeem  your Fund shares by offering  them for  "repurchase"  or
"redemption"  directly to the Fund or through your  dealer.  If you offer shares
through  your dealer  before the close of the New York Stock  Exchange  and your
dealer  transmits your offer to the Distributor  before 1:00 p.m. (San Francisco
time) that day, you will  receive  that day's price.  Your dealer may charge for
this service,  but you can avoid this charge by selling your shares  directly to
the Fund as described below.


To sell your shares  directly to the Fund (that is, to redeem your shares),  you
must send your instructions to the Fund at One  Market-Steuart  Tower #1600, San
Francisco,  California 94105. You may also send your redemption  instructions by
FAX to (415) 778-0228 if the  redemption is less than $25,000.  Your shares will
be redeemed at the net asset value next determined  after receipt by the Fund of
your  instructions  in proper form.  Give your  account  number and indicate the
number of shares you wish to redeem.  All owners of the account must sign unless
the account  application  form states that only one  signature is necessary  for
redemptions.  All redemption checks must be sent to the address-of-record on the
account.  The Fund must have a  change-of-address  on file for 30 days before we
send redemption or distribution checks to the new address. Otherwise, we require
a signature  guarantee or the check must be sent to the old address. If you wish
to have redemption  proceeds sent by wire transfer or by overnight  mail,  there
will be a charge of $10 per transaction.  The Fund usually  requires  additional
documents  when shares are  registered  in the name of a  corporation,  agent or
fiduciary or if you are a surviving  joint owner.  In the case of a corporation,
we usually require a corporate  resolution signed by the secretary.  In the case
of an agent or fiduciary,  we usually  require an authorizing  document.  In the
case of a  surviving  joint  owner,  we  usually  require  a copy  of the  death
certificate.  Contact  the  Fund by  phone  at  (800)  999-3505  if you have any
questions about requirements for redeeming your shares. 

If the Fund has received  payment for the shares you wish to redeem and you have
provided the  instructions  and any other documents  needed in correct form, the
Fund will promptly send you a check for the proceeds from the sale.  Ordinarily,
the Fund must send you a check  within  seven  days  unless  the New York  Stock
Exchange is closed for other than weekends or holidays.  However, payment may be
delayed for any shares  purchased by check for a reasonable  time (not to exceed
15 days from the date of such purchase) necessary to determine that the purchase
check will be honored.  Rules of the  Securities  and Exchange  Commission  also
authorize  delayed  redemptions  during  periods when trading on the Exchange is
restricted  or during an emergency  which makes it  impractical  for the Fund to
dispose of its securities or to determine  fairly the value of its net assets or
during any other period  authorized  by the  Commission  for the  protection  of
investors. <PAGE>

REINVESTMENT PRIVILEGE. If you redeem some or all of your shares and then change
your mind, you may re-invest them without sales charge at the net asset value if
you do so  within  60 days.  This  privilege  may be  exercised  only  once by a
shareholder  with respect to this Fund.  However,  a shareholder has not used up
this one-time  privilege if the sole purpose of a prior redemption was to invest
the proceeds at net asset value in an Individual  Retirement  Account or SEP. If
the  shareholder  has  realized a gain on the  redemption,  the  transaction  is
taxable and reinvestment will not alter any capital gains tax payable.  If there
has been a loss on the redemption, some or all of the loss may not be allowed as
a tax deduction  depending on the amount  reinvested.  If a shareholder  redeems
shares  from the  Parnassus  Fund and  invests  the  proceeds  in  shares of the
Parnassus Income Fund, the shareholder may reinvest the proceeds of those shares
back into the Parnassus Fund at any time without a sales charge.


REDEMPTION OF SMALL ACCOUNTS.  The Trustees may, in order to reduce the expenses
of the Fund,  redeem all of the shares of any shareholder whose account is worth
less than $500 as a result of a  redemption.  This will be done at the net asset
value  determined  as of the close of business on the business day preceding the
sending of such  notice of  redemption.  The Fund will give  shareholders  whose
shares are being  redeemed  60 days' prior  written  notice in which to purchase
sufficient shares to avoid such redemption.

DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------

By paying out  substantially all its net investment income (among other things),
the  Fund  believes  it  qualifies  as  a  regulated  investment  company  under
Subchapter  M of the  Internal  Revenue  Code.  The Fund  intends to continue to
qualify  and,  if so, it will not pay  federal  income  taxes on either  its net
investment  income or on its capital gains.  Instead,  each  shareholder will be
responsible for his or her own taxes.  All dividends from net investment  income
together with distributions of short-term capital gains  (collectively,  "income
dividends"), will be taxable as ordinary income to shareholders even though paid
in  additional   shares.   Any  net  long-term   capital  gains  ("capital  gain
distributions") distributed to shareholders are taxable as such to shareholders.
Tax-exempt  shareholders,  of course,  will not be  required to pay taxes on any
amounts paid to them.

Income  dividends and capital gains  distributions  will be paid once a year and
they are taxable in the year received.  For the  convenience  of investors,  all
payments  are made in shares of the Fund and there is no sales  charge  for this
reinvestment.  Shareholders  who prefer to receive  payment of income  dividends
and/or  capital gain  distribution  in cash should notify the Fund at least five
days prior to the  payment  date.  Annually,  you will  receive on Form 1099 the
dollar amount and tax status of all Distributions you received.

The Fund may be required to impose backup  withholding at a rate of 31% from any
income dividends and capital gain  distributions  and upon payment of redemption
proceeds.  Shareholders  can eliminate any backup  withholding  requirements  by
furnishing  certification  of  taxpayer  identification  numbers  and  reporting
dividends. 

To the extent that income  dividends are derived from qualifying  dividends paid
by domestic corporations whose shares are owned by the Fund, such dividends,  in
the hands of the Fund's  corporate  shareholders,  will be eligible  for the 70%
dividends received deduction.

The  distribution  is usually  made in  December  of each year.  If an  investor
purchases shares just before the  distribution  date, he or she will be taxed on
the distribution even though it's a return of capital.

<PAGE>

PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------

From time to time, the Fund may advertise its total return for prior periods.
Any such  advertisement  would  include at least  average  annual  total  return
quotations for one, five and ten year periods.  The total return of the Fund for
a particular  period  represents  the  increase (or  decrease) in the value of a
hypothetical  investment  in the  Fund,  from  the  beginning  to the end of the
period.  Total  return is  calculated  by  subtracting  the value of the initial
investment  from the ending value and showing the  difference as a percentage of
the initial  investment;  the calculation assumes the initial investment is made
at the maximum public  offering price (maximum sales charge) and that all income
dividends or capital  gains  distributions  during the period are  reinvested in
Fund shares at net asset value. Total return is based on historical earnings and
asset value fluctuations and is not intended to indicate future performance.  No
adjustments  are made to reflect any income  taxes  payable by  shareholders  on
dividends  and  distributions  paid by the Fund.  Average  annual  total  return
quotations  for periods of two or more years are computed by finding the average
annual  compounded  rate of return over the period that would equate the initial
amount invested to the ending redeemable  value.  Quotations of "overall return"
are the same as "total return" except that "overall return"  calculations do not
deduct the sales charge.
<TABLE>
<CAPTION>
Performance  Figures

FOR PERIODS ENDING DECEMBER 31, 1996    AVERAGE ANNUAL TOTAL RETURN   AVERAGE ANNUAL OVERALL RETURN
<S>                                     <C>                           <C>
- ---------------------------------------------------------------------------------------------------
One Year                                           7.77%                   11.68%
Five Years                                        14.27%                   15.09%
Ten Years                                         12.20%                   12.60%

<FN>
     Total return is the return to an  individual  shareholder  after paying the
maximum sales charge.

     Overall return gives the investment performance of the Fund. Overall return
     does not take into account payment of the sales charge.  This return figure
     should be used for  comparative  purposes  such as comparing  the Parnassus
     Fund's performance to published returns in newspapers and magazines.
</FN>
</TABLE>

The Fund may also  advertise its  cumulative  total return for prior periods and
compare its  performance  to the  performance  of other  selected  mutual funds,
selected  market  indicators  such as the  Standard & Poor's 500 stock  index or
non-market indices or averages of mutual fund industry groups.

The  Fund may  quote  its  performance  rankings  and/or  other  information  as
published by  recognized  independent  mutual funds  statistical  services or by
publications of general  interest.  In connection  with a ranking,  the Fund may
provide  additional  information,  such as the  particular  category to which it
relates,  the  number of funds in that  category,  the  criteria  upon which the
ranking is based,  and the effect of sales charges,  fee waivers and/or expenses
reimbursements.

All Fund performance  information is historical and is not intended to represent
or guarantee future results.  The value of Fund shares when redeemed may be more
or less  than  their  orginal  cost.   The  Fund's  annual  report  contains
additional performance information including a discussion by management. You may
obtain a copy of the annual  report  without  charge by  calling or writing  the
Fund.

<PAGE>


GENERAL INFORMATION
- --------------------------------------------------------------------------------

The Fund was organized as a  Massachusetts  business trust on April 4,1984.  The
Declaration  of Trust  provides  the  Trustees  will not be liable for errors of
judgment  or mistakes of fact or law,  but nothing in the  Declaration  of Trust
protects a Trustee  against any liability to which he or she would  otherwise be
subject  by reason of  willful  misfeasance,  bad  faith,  gross  negligence  or
reckless disregard of the duties involved in the conduct of his or her office.

Shareholders  are entitled to one vote for each full share held (and  fractional
votes for  fractional  shares) and may vote in the  election of Trustees  and on
other matters submitted to meetings of shareholders. It is not contemplated that
regular annual meetings of  shareholders  will be held. The Declaration of Trust
provides that the Fund's  shareholders  have the right,  upon the declaration in
writing or vote of more than two-thirds of its outstanding  shares,  to remove a
Trustee. The Trustees will call a meeting of shareholders to vote on the removal
of a Trustee upon the written  request of the record  holders of ten per cent of
its shares. In addition, ten shareholders holding the lesser of $25,000 worth or
one percent of Fund shares may advise the  Trustees in writing that they wish to
communicate  with other  shareholders for the purpose of requesting a meeting to
remove a Trustee.  The Trustees will then, if requested by the applicants,  mail
at  the  applicants'   expense  the  applicants'   communication  to  all  other
shareholders.  No amendment may be made to the  Declaration of Trust without the
affirmative vote of the holders of more than 50% of its outstanding  shares. The
holders of shares have no pre-emptive or conversion  rights.  Shares when issued
are fully paid and  non-assessable,  except as set forth above.  The Fund may be
terminated  upon the sale of its  assets  to  another  issuer,  if such  sale is
approved by the vote of the holders of more than 50% of our outstanding  shares,
or upon liquidation and  distribution of its assets,  if approved by the vote of
the holders of more than 50% of our  outstanding  shares.  If not so terminated,
the Fund will continue indefinitely.

Deloitte & Touche LLP, 50 Fremont Street,  San Francisco,  California  94105 has
been selected as the Fund's independent auditors.

Union Bank of California,  475 Sansome Street, San Francisco,  California 94111,
has been selected as the custodian of the Fund's assets.  Shareholder  inquiries
should be directed to the Fund.

Parnassus Investments, One Market-Steuart Tower #1600, San Francisco, California
94105,  is the Fund's  transfer agent and accounting  agent.  As transfer agent,
Parnassus  Investments  receives  a fee of  $2.30  per  account  per  month.  As
accounting  agent,  Parnassus  Investments  receives a fee of $70,000  per year.
Jerome L. Dodson,  the Fund's  President,  is the sole  stockholder of Parnassus
Investments.

Parnassus  Investments  may also  arrange for third  parties to provide  certain
services  including  account  maintenance,   recordkeeping  and  other  personal
services to their clients who invest in the Fund. For these  services,  the Fund
may pay Parnassus  Investments an aggregate  service fee at a rate not to exceed
0.25% per annum of the Fund's  average daily net assets.  Parnassus  Investments
will not keep any of this fee for  itself,  but will  instead use the fee to pay
the third party  service  providers.  (Service  providers who do not maintain an
omnibus  account for their  clients  will be limited to a fee of 0.10% per annum
paid by the Fund. Parnassus Investments,  however, may elect to pay such service
providers an additional 0.15% from its own funds for a total not to exceed 0.25%
per annum.)


<PAGE>


INVESTMENT ADVISER
Parnassus Investments
One Market-Steuart Tower #1600
San Francisco, California 94105

LEGAL COUNSEL
Richard D. Silberman, Esq.
465 California Street #1020
San Francisco, California 94104

AUDITORS
Deloitte & Touche LLP
50 Fremont Street
San Francisco, California 94105

CUSTODIAN
Union Bank of California
475 Sansome Street
San Francisco, California 94111

DISTRIBUTOR
Parnassus Investments
One Market-Steuart Tower #1600
San Francisco, California 94105

<PAGE>




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