PAINEWEBBER EQUITY TRUST GROWTH STOCK SERIES 21
S-6, 1998-01-08
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<PAGE>

                                                             File No. 333-35615


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

   
                                AMENDMENT NO. 2
    
                                       TO
                                    FORM S-6

For Registration Under the Securities Act of 1933 of Securities
of Unit Investment Trusts Registered on Form N-8B-2

         A.       Exact name of Trust:

                           THE PAINEWEBBER EQUITY TRUST,
                           GROWTH STOCK SERIES 21

         B.       Name of Depositor:

                           PAINEWEBBER INCORPORATED

         C.       Complete address of Depositor's principal executive
                  office:

                           PAINEWEBBER INCORPORATED
                           1285 Avenue of the Americas
                           New York, New York  10019

         D.       Name and complete address of agents for service:

                           PAINEWEBBER INCORPORATED
                           Attention:  Mr. Robert E. Holley
                           1200 Harbor Boulevard
                           Weehawken, New Jersey  07087

                           Copy to:

                           CARTER, LEDYARD & MILBURN
                           Attention: Kathleen H. Moriarty, Esq.
                           2 Wall Street
                           New York, New York  10005

         E.       Total and amount of securities being registered:

                           An indefinite number of Units pursuant to Rule 24f-2
                           of the Investment Company Act of 1940.

         F.       Proposed maximum offering price to the public
                           of the securities being registered:

                           Indefinite



<PAGE>



         G.                Amount of filing fee, computed at one-thirty-
                           fourth of 1 percent of the proposed maximum
                           aggregate offering price to the public:

                           None required pursuant to Rule 24f-2.

         H.       Approximate date of proposed sale to public:

                           AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF
                           THE REGISTRATION STATEMENT

                  / /      Check box if it is proposed that this filing will
                           become effective on January _, 1998 at 3:00 p.m.
                           pursuant to Rule 487.







<PAGE>




                         THE PAINEWEBBER EQUITY TRUST,
                             GROWTH STOCK SERIES 21

                             Cross Reference Sheet

                    Pursuant to Rule 404(c) of Regulation C
                        under the Securities Act of 1933

                  (Form N-8B-2 Items required by Instruction 1
                         as to Prospectus on Form S-6)


Form N-8B-2                                      Form S-6
Item Number                                      Heading in
- -----------                                      ----------
Prospectus                                  
- ----------
I.  Organization and General Information        
- ----------------------------------------
 1.     (a) Name of Trust                       )  Front Cover
        (b) Title of securities issued          )
                                            
 2.     Name and address of Depositor           )  Back Cover
                                            
 3.     Name and address of Trustee             )  Back Cover
                                            
 4.     Name and address of principal           )  Back Cover
          Underwriter                           )
                                            
 5.     Organization of Trust                   )  The Trust
                                            
 6.     Execution and termination of            )  The Trust
          Trust Agreement                       )  Termination of the
                                                )    Trust
                                            
 7.     Changes of name                         )   *
                                            
 8.     Fiscal Year                             )   *
                                            
 9.     Litigation                              )   *
                                            
                                           
                      II. General Description of the Trust
                          and Securities of the Trust
                          ---------------------------

10.     General Information regarding Trust's   )  The Trust
          Securities and Rights of Holders      )  Rights of
Unitholders






- -------------
* Not applicable, answer negative or not required.






<PAGE>



        (a)    Type of Securities               )  The Trust
               (Registered or Bearer)           )

        (b)    Type of Securities               )  The Trust
               (Cumulative or Distributive)     )

        (c)    Rights of Holders as to          )  Rights of Unitholders
               Withdrawal or Redemption         )  Redemption
                                                )  Public Offering of
                                                )  Units, Secondary
                                                )  Market for Units
                                                )  Exchange Option

        (d)    Rights of Holders as to          )  Public Offering of
               conversion, transfer, etc.       )  Units-Administration
                                                )  of the Trust

        (e)    Rights of Trust issues periodic  )   *
               payment plan certificates        )

        (f)    Voting rights as to Securities,  )  Rights of Unitholders
               under the Indenture              )  Amendment of the Trust
                                                )  Termination of the
                                                )  Trust

        (g) Notice to Holders as to             )
               change in                        )
               (1) Assets of Trust              )
               (2) Terms and Conditions         )
                    of Trust's Securities       )
               (3) Provisions of Trust          )  Amendment of the Indenture
               (4) Identity of Depositor        )  Administration of the Trust-
                   and Trustee                  )  Portfolio Supervision

        (h)    Consent of Security Holders      )
               required to change               )

               (1) Composition of assets        )  Amendment of the Indenture
                   of Trust
               (2) Terms and conditions         )  Amendment of the Indenture
                    of Trust's Securities       )
               (3) Provisions of Indenture      )
               (4) Identity of Depositor and    )  Amendment of the Indenture
                   Trustee                      )

11.     Type of securities comprising           )  The Trust Rights of Unit-
        security holder's interest              )  holders Administration of
                                                )  the Trust-Portfolio
                                                )  Supervision

- -------------
* Not applicable, answer negative or not required.







<PAGE>



12.     Information concerning periodic         )   *
        payment certificates                    )

13.     (a) Load, fees, expenses, etc.          )  Public Offering Price of
                                                )  Units, Administration of
                                                )  the Trust, Expenses of the
                                                )  Trust

        (b)    Certain information regarding    )   *
               periodic payment certificates    )

        (c)    Certain percentages              )  Public offering of Units

        (d)    Certain other fees, etc.         )
               payable by holders               )  Rights of Unitholders

        (e)    Certain profits receivable by    )  Public Offering of Units-
               depositor, principal under-      )  Public Offering Price;
               writers, trustee or affiliated   )  -Sponsor's Profit-Secondary
               persons                          )  Market for Units

        (f)    Ratio of annual charges to       )   *
               income                           )

14.     Issuance of trust's securities          )  The Trust
                                                )  Public Offering of Units

15.     Receipt and handling of payments        )  Public offering of Units
        from purchasers                         )

16.     Acquisition and disposition of          )  The Trust, Administration
        Underlying Securities                   )  of the Trust, Amendment of
                                                )  the Indenture, Termination
                                                )  of the Trust

17.     Withdrawal or redemption                )  Public Offering of Units
                                                )  Administration of the Trust

18.     (a)    Receipt and disposition of       )  Distributions, The Trust,
               income                           )  Distributions, Administra-
                                                )  tion of the Trust

        (b)    Reinvestment of distributions    )   *

        (c)    Reserves or special fund         )  Distributions, Redemption,
                                                )  Expenses of the Trust,
                                                )  Termination of the Trust,
                                                )  Amendment of the Indenture


- -------------
* Not applicable, answer negative or not required.







<PAGE>



        (d)    Schedule of distribution         )   *

19.     Records, accounts and report            )  Distributions, Administra-
                                                )  tion of the Trust

20.     Certain miscellaneous provisions        )  Trustee, Sponsor, Termina-
        of trust agreement                      )  tion of the Trust, Amend-
                                                )  ment of the Indenture

21.     Loans to security holders               )   *

22.     Limitations on liability                )  Sponsor, Trustee, Redemp-
                                                )  tion

23.     Bonding arrangements                    )  Included in Form N-8B-2

24.     Other material provisions of            )   *
        trust agreement                         )


                        III. Organization Personnel and
                        Affiliated Persons of Depositor
                        -------------------------------

25.     Organization of Depositor               )  Sponsor

26.     Fees received by Depositor              )  Public Offering of
                                                )  Units-Public Offering
                                                )  Price, Expenses of the
                                                )  Trust

27.     Business of Depositor                   )  Sponsor

28.     Certain information as to               )  Sponsor
        officials and affiliated                )
        persons of Depositor                    )

29.     Voting securities of Depositor          )   *

30.     Persons controlling Depositor           )  Sponsor

31.     Payments by Depositor for certain       )   *
        other services trust                    )

32.     Payments by Depositor for certain       )   *
        certain other services                  )
        rendered to trust                       )

33.     Remuneration of employees of            )   *
        Depositor for certain services          )
        rendered to trust                       )


- -------------
* Not applicable, answer negative or not required.







<PAGE>



34.     Remuneration of other persons           )   *
        for certain services rendered           )
        to trust                                )


                 IV. Distribution and Redemption of Securities
                 ---------------------------------------------

35.     Distribution of trust's                 )  Public Offering of Units
        securities by states                    )

36.     Suspension of sales of trust's          )   *
        securities                              )

37.     Revocation of authority to              )   *
        distribute                              )

38.     (a)    Method of distribution           )  Public Offering of Units
        (b)    Underwriting agreements          )  The Trust, Administration
        (c)    Selling agreements               )  of The Trust

39.     (a)    Organization of principal        )  Sponsor
               Underwriter                      )
        (b)    N.A.S.D. membership of           )  Sponsor
               principal underwriter            )

40.     Certain fees received by                )  Public Offering of Units,
        principal underwriter                   )  Expenses of the Trust

41.     (a)    Business of principal            )  Sponsor
               underwriter                      )

        (b)    Branch officers of principal     )
               underwriter                      )

        (c)    Salesman of principal            )   *
               underwriter                      )

42.     Ownership of trust's securities         )   *
        by certain persons                      )

43.     Certain brokerage commissions           )   *
        received by principal underwriter       )

44.     (a)    Method of valuation              )  Public Offering of Units
                                                )  Valuation
        (b)    Schedule as to offering price    )   *

        (c)    Variation in offering            )  Public Offering of Units
               Price to certain persons         )  Administration of the Trust

- -------------
* Not applicable, answer negative or not required.







<PAGE>



45.     Suspension of redemption rights         )   *

46.     (a)    Redemption valuation             )  Public Offering of Units
                                                )  -Public Offering Price
                                                )  -Secondary Market for Units
                                                )  Valuation, Redemption

        (b)    Schedule as to redemption        )   *
               price                            )


               V. Information concerning the Trustee or Custodian
               --------------------------------------------------

47.     Maintenance of position in              )  Redemption, Public Offering
        underlying securities                   )  of Units-Public Offering
                                                )  Price

48.     Organization and regulation of          )  Trustee
        Trustee                                 )

49.     Fees and expenses of Trustee            )  Expenses of the Trust

50.     Trustee's lien                          )  Expenses of the Trust


         VI. Information concerning Insurance of Holders of Securities
         -------------------------------------------------------------

51.     (a)    Name and address of Insurance    )   *
               Company                          )
        (b)    Type of policies                 )   *
        (c)    Type of risks insured and        )   *
               excluded                         )
        (d)    Coverage of policies             )   *
        (e)    Beneficiaries of policies        )   *
        (f)    Terms and manner of              )   *
               cancellation                     )
        (g)    Method of determining premiums   )   *
        (h)    Amount of aggregate premiums     )   *
               paid                             )
        (i)    Who receives any part of         )   *
               premiums                         )
        (j)    Other material provisions of     )   *
               the Trust relating to insurance  )


- -------------
* Not applicable, answer negative or not required.







<PAGE>




                           VII. Policy of Registrant
                           -------------------------

52.     (a)    Method of selecting and          )  The Trust, Administration
               eliminating securities from      )  of the Trust
               the Trust                        )
        (b)    Elimination of securities        )   *
               from the Trust                   )
        (c)    Policy of Trust regarding        )  The Trust, Administration
               substitution and elimination     )  of the Trust
               of securities                    )
        (d)    Description of any funda-        )  The Trust, Administration
               mental policy of the Trust       )  of the Trust-Portfolio
                                                )  Supervision

53.     (a)    Taxable status of the Trust      )  Federal Income Taxes
        (b)    Qualification of the Trust as    )
               a regulated investment company   )


                  VIII. Financial and Statistical Information
                  -------------------------------------------

54.     Information regarding the Trust's       )   *
               past ten fiscal years            )

55.     Certain information regarding           )   *
        periodic payment plan certificates      )

56.     Certain information regarding           )   *
        periodic payment plan certificates      )

57.     Certain information regarding           )   *
        periodic payment plan certificates      )

58.     Certain information regarding           )   *
        periodic payment plan certificates      )

59.     Financial statements                    )  Statement of Financial
        (Instruction 1(c) to Form S-6)          )  Condition






- -------------
* Not applicable, answer negative or not required.







<PAGE>




                          UNDERTAKING TO FILE REPORTS


                  Subject to the terms and conditions of Section 15(d) of the
Securities Exchange Act of 1934, the undersigned registrant hereby undertakes
to file with the Securities and Exchange Commission such supplementary and
periodic information, documents and reports as may be prescribed by any rule or
regulation of the Commission heretofore or hereafter duly adopted pursuant to
authority conferred in that section.






<PAGE>

                           PAINEWEBBER EQUITY TRUST 
                            Growth Stock Series 21 


                               [POWERGRAB LOGO]

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


   The investment objective of this Trust is to provide for capital 
appreciation through an investment in equity stocks having, in Sponsor's 
opinion on the Initial Date of Deposit, an above-average potential for 
capital appreciation because the issuers thereof may be attractive candidates 
for acquisitions. PaineWebber believes that merger and acquisition activity 
is likely to accelerate over the next few years, leading to a "power grab" 
for attractive acquisition candidates. The value of the Units will fluctuate 
with the value of the portfolio of underlying securities. 


   The minimum purchase is $250. Only whole Units may be purchased. 
- ----------------------------------------------------------------------------- 

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

                                   SPONSOR: 

                           PAINEWEBBER INCORPORATED 

              Read and retain this prospectus for future reference. 


                PROSPECTUS DATED JANUARY 8, 1998 

<PAGE>

                  ESSENTIAL INFORMATION REGARDING THE TRUST 
                           AS OF JANUARY 7, 1998(1) 

   
<TABLE>
<CAPTION>
<S>                                                           <C>
Sponsor:      PaineWebber Incorporated 
Trustee:      Investors Bank & Trust Company 

Initial Date of Deposit: January 8, 1998 

    Aggregate Value of Securities in Trust: ................. $962,500 
    Number of Units: ........................................  100,000 
    Fractional Undivided Interest in the Trust Represented     
     by Each Unit: .......................................... 1/100,000th
    Calculation of Public Offering Price Per Unit(2) 
     Aggregate Value of Underlying Securities in Trust ...... $962,500 
     Divided by 100,000 Units ............................... $9.625 
     Plus Sales Charge of 3.75% of Public Offering Price 
      (3.90% of net amount invested per Unit) ............... $.375 
     Public Offering Price per Unit ......................... $10.00 
Redemption Value: ........................................... $9.625 
Evaluation Time:............................................. 4:00 P.M. New York time. 
Income Account Distribution Dates(3): ....................... April 20, 1998 and quarterly 
                                                               thereafter and on the Mandatory 
                                                               Termination Date. 
Capital Account Distribution Dates(3):....................... January 20, 1999 and annually 
                                                               thereafter and on the Mandatory 
                                                               Termination Date. No distributions of 
                                                               less than $.05 per Unit need be made 
                                                               from the Capital Account on any 
                                                               Distribution Date. 
Record Dates:................................................ March 31, 1998 and quarterly 
                                                               thereafter. 
Mandatory Termination Date:.................................. January 30, 2003 
Discretionary Liquidation Amount:............................ 50% of the value of Securities upon 
                                                               completion of the deposit of 
                                                               Securities. 
Estimated Annual Organizational Expenses of the Trust(4):  .. $.0080 per Unit. 
Estimated Other Expenses of the Trust........................ $.0312 per Unit. 
                                                              -----------------
Total Estimated Annual Expenses of the Trust(5):  ........... $.0392 per Unit. 
</TABLE>
    
- ------------ 
(1)   The date prior to the Initial Date of Deposit. 
(2)   The Public Offering Price will be based upon the value of the Stocks 
      next computed following receipt of the purchase order plus the 
      applicable sales charges. Following the Initial Date of Deposit, costs 
      incurred in connection with the acquisition of additional Stocks will be 
      at the expense of the Trust. (See "Essential Information Regarding the 
      Trust--Additional Deposits," "Risk Factors and Special Considerations" 
      and "Valuation"). 
(3)   See "Distributions". 
(4)   This Trust (and therefore the investors) will bear all or a portion of 
      its organizational costs--including costs of preparing the initial 
      registration statement, the trust indenture and other closing documents, 
      registering Units with the SEC and the states and the initial audit of 
      the Portfolio--as is common for mutual funds. Historically, the sponsors 
      of unit investment trusts have paid all the costs of establishing those 
      trusts. 
(5)   See "Expenses of the Trust". Estimated dividends from the Stocks, based 
      upon last dividends actually paid, are expected by the Sponsor to be 
      sufficient to pay estimated expenses of the Trust. If such dividends and 
      income paid are insufficient to pay expenses, the Trustee is authorized 
      to sell Securities in an amount sufficient to pay such expenses. (See 
      "Administration of the Trust" and "Expenses of the Trust".) 


                                2           
<PAGE>
ESSENTIAL INFORMATION REGARDING THE TRUST (CONTINUED) 

   
   THE TRUST. The objective of the PaineWebber Equity Trust, Growth Stock 
Series 21 (the "Trust") is to provide for capital appreciation through an 
investment in equity stocks which have, in the Sponsor's opinion, on the 
Initial Date of Deposit, an above-average potential for capital appreciation, 
because the issuers thereof may be attractive candidates for acquisition 
(referred to herein as the "Stocks" or the "Securities"). OF COURSE, THERE 
CAN BE NO ASSURANCE THAT THE OBJECTIVE OF THE TRUST WILL BE ACHIEVED. 
    
   PaineWebber believes that many companies present attractive opportunities 
to acquirors and on the Initial Date of Deposit has identified issuers of 
Stocks contained in the Trust as potential candidates for acquisition. The 
Trust will seek to achieve its objective of capital appreciation through an 
investment in a diversified portfolio of such Stocks. PaineWebber believes 
that merger and acquisition ("M&A") activity will accelerate for the reasons 
described below under the heading "The Composition of the Portfolio." 

   SUMMARY OF RISK FACTORS. There are certain investment risks inherent in 
unit trust portfolios which hold equity securities. The Stocks may appreciate 
or depreciate in value or pay dividends depending on the full range of 
economic and market influences affecting corporate profitability, the 
financial condition of the issuers, the prices of equity securities, the 
condition of the stock markets in general and the prices of the stocks in 
particular. In addition, rights of common stock holders are generally 
inferior to those of holders of debt obligations or preferred stock. See 
"Risk Factors and Special Considerations" for a discussion of these risks. 


   There can also be no assurance that the Trust portfolio will remain 
constant during the life of the Trust. For example, the Trustee may be 
required to sell Securities to pay for the expenses of the Trust (see 
"Expenses of the Trust" and "Administration of the Trust--Accounts"). Also, 
certain events might occur which could lead to the elimination of one or more 
Stocks from the Portfolio (see "Administration of the Trust--Portfolio 
Supervision"), thereby reducing the diversity of the Trust's investments. 
Further, under certain circumstances, if a tender offer is made for any of 
the Stocks in the Trust, or in the event of a merger or reorganization, the 
Trust will either tender the Stocks or sell them as more fully described 
under the captions "The Trust" and "Administration of the Trust--Portfolio 
Supervision," herein. 

                                3           
<PAGE>

THE COMPOSITION OF THE PORTFOLIO. 

THE ACQUISITION ACCELERATION 

   PaineWebber believes that M&A (merger and acquisition) activity is strong 
and likely to become even stronger--probably surpassing the late 1980s peak 
levels--because acquisitions offer a source of sales growth at a time when a 
muted business cycle and deflationary pressures make it very difficult to 
raise prices. PaineWebber identifies two ways to invest in this trend: a) 
companies that are adept at growing via acquisition and b) companies that are 
likely to be acquired at a premium to their market price. M&A activity should 
accelerate because companies need to do deals to grow sales, and they have 
the ability to do them. 

   And with PaineWebber's forecast that S&P (Standard & Poor's 500) earnings 
growth will slow in 1998 and a concomitant rise in the number of 
company-specific earnings disappointments, two other drivers of M&A 
activity--albeit somewhat spurious--will be: 

   o  acquisitions undertaken by firms anxious to deflect attention from 
      their deteriorating financial results, and 

   o  mergers initiated by managers who realize that, if they cannot "fix" 
      their firm's earnings problems, then selling out is the best route for 
      them as shareholders and option holders. 

NEED 

   PaineWebber observes that during the 1980s, CEOs (Chief Executive 
Officers) could count on price increases for a few points of sales growth. 
Adding some unit growth, a little margin expansion and maybe a share buyback 
program resulted in earnings-per-share ("EPS") growing at a 10-12% rate. 

   PaineWebber asserts that those days are over. Over the past year, the 
Producer Price Index actually fell 0.6% versus rising 2.2% in the second half 
of the 1980s. Today, many CEOs are grateful if their product prices are not 
declining, and recent trends in Asia will only accentuate deflationary 
pressures. 

   PaineWebber believes that with price increases a thing of the past, 
acquisitions provide an important alternative source of top-line growth. And 
acquisitions do so without adding to industry capacity, which is vital at a 
time when many industries already have current or incipient gluts. Better 
still, after sales are increased via acquisition, margins on these new sales 
can be increased by eliminating redundant overhead, cutting costs, etc. 
Although there are many specific reasons why companies do 
acquisitions--reasons that are set forth below--the underlying motivation is 
that they provide an important source of unit growth at a time when price 
trends in most industries are flat to down. 

ABILITY 
   
   PaineWebber believes that most corporations have the ability to make 
acquisitions today because they are generating plenty of free cash flow or 
can use shares as an acquisition currency. Thanks to the muted business 
cycle, S&P profit margins have been at or near peak levels for the past three 
years. And sales per share have been climbing at a mid-single-digit rate. 
Consequently the earnings and gross cash flow of S&P 500 companies has been 
strong. Much of this money is going into capital investment; U.S. business 
fixed investment grew at a real rate of 10% over the past three years. But 
alot of money is left over for companies to spend on: 
    

   o  dividend hikes 

   o  debt paydown 

                                4           
<PAGE>

   o  share buybacks 

   o  acquisitions 

   PaineWebber observes that two of these four possible uses of capital are 
not attracting much new money. Dividend increases are out of fashion; the 
payout ratio of the S&P 500 is at an all-time low. Debt paydown is also a low 
priority because, after six years of economic expansion, balance sheets are 
in good shape, with the debt to total equity ratio of the S&P Industrials 
moving down over the past four years, and now at the best level in almost ten 
years. Debt is a low-cost form of capital. Although a few companies have more 
debt than they would like, there are probably more firms with too little debt 
than too much. 
   
   PaineWebber notes the other two possible uses of capital are share 
buybacks and acquisitions. Although they are important for certain firms, 
buybacks are over-exaggerated as a source of EPS growth. They are important 
for preventing EPS dilution from employee options. But only about 10% of S&P 
500 firms actually shrank their share base more than 2% annually over the 
past four years. 
    
   Consequently, PaineWebber believes, plenty of cash is available to spend 
on acquisitions, and deals can also be financed with shares. Over the 1994-96 
period, about half of major deals by S&P firms were for cash, and half for 
shares. Moreover, CEOs have not only the financial ability to do deals, but 
the time and inclination. The heavy lifting of corporate restructuring is 
over. Costs have been cut, weak businesses have been sold, margins are high. 
Unfortunately, once margins are high, it is difficult to get them higher, 
particularly with labor markets tight and plenty of capacity being added 
around the world. So generating sales growth becomes a more pressing priority 
for CEOs, and acquisitions are an excellent source of top-line growth. With 
business conditions healthy in most industries, CEOs have the confidence to 
do deals. 

THE FEAR FACTOR 

   PaineWebber observes that most corporations would rather acquire than be 
acquired. As competition becomes ever more vicious in a world without price 
hikes, bigger is better. "Gorillas" (a term PaineWebber uses to refer to 
companies that have dominant market share and are still growing) that 
dominate their markets tend to prosper, while weaker firms are at risk of 
losing market share and thus their competitiveness. This creates a strong 
extra incentive for firms to make acquisitions in order to become the 
"gorilla" in their market--or at least to remain competitive with them. And 
if a firm decides to make an acquisition, it is better to be early to choose 
from potential takeover candidates, before rivals have acquired the prime 
companies. This competitive dynamic should lend a further impetus to the 
coming acquisition boom. 

VALUATIONS WILL NOT DAMPEN DEAL ACTIVITY 
   
   Some people argue that M&A activity will slow because deals are too 
expensive. PaineWebber disagrees, for several reasons. In the first place, at 
a 21x normal price over earnings ratio ("P/E"), the stock market (as measured 
by the S&P 500) as a whole is not expensive in the context of 2.5% inflation; 
PaineWebber asserts that it is fairly valued. Furthermore, a corporation's 
prime alternative to acquiring other companies is to buy back its own stock, 
which in many cases is no cheaper than that of potential targets. And if 
firms increase dividends instead of doing acquisitions and repurchasing 
shares, many shareholders must pay taxes on those dividends at a high 
marginal rate--and then, in many cases, reinvest the money back into the 
stock market anyway. Finally, although the shares of many target companies 
carry high P/Es by the standards of recent history, so do the shares of 
acquirors, which can be used as acquisition currency. This is a critical 
point and explains, for example, why the pace of deals in the banking 
    
                                5           

<PAGE>

industry has not slowed even though the valuation of deals has climbed from 
about a P/E of 15x a few years ago to 20x today. In any case, many 
acquisition decisions are driven not by narrow financial criteria but rather 
by strategic considerations involving the viability of the company. 

EIGHT DEAL DRIVERS 
   
   Although the broad reason for acquisitions is a quest for sales growth 
that will enhance competitiveness, the specific motivation for deals varies 
greatly from industry to industry, depending on competitive dynamics. 
PaineWebber identifies eight drivers, discussed below, as among the most 
important. Since PaineWebber expects all of them to remain in place over the 
next few years, M&A activity will continue to be heavy: 
    
   o  TO GAIN ECONOMIES OF SCALE in buying materials (particularly important 
      in packaging), building brands (which is becoming a challenge for 
      energy utilities), spreading administrative costs over more customers 
      and investing in cutting-edge technology. Both the food retailing and 
      banking industries, for example, are beginning to divide between giant 
      firms that can afford the latest technology and other firms that 
      cannot. One reason is that software is expensive but "scalable." If it 
      costs two supermarket chains the same $2 million to develop a 
      sophisticated inventory control system, but one store has ten times as 
      many stores, the bigger chain's software investment per store will be 
      only one tenth as big. 

   o  TO GAIN ECONOMIES OF SCOPE. Many customers prefer "one-stop shopping," 
      so the large company that sells a broad range of products has a 
      competitive advantage. Corporations want to get everything from laptops 
      to servers from a single hardware vendor. Hospitals would rather deal 
      with a medical device company that provides a full range of coronary 
      care products. And managed care providers would rather deal with 
      hospital companies that have hospitals throughout a metropolitan 
      region. Auto makers desire fewer, larger, and more sophisticated parts 
      makers that can help with design work and offer a larger, integrated 
      product--e.g., all of a car's interior, rather than just the seats or 
      the dashboard. 

   o  VERTICAL INTEGRATION INTO HIGHER-MARGIN BUSINESSES. Compaq, for 
      example, acquired Tandem to increase its presence in the high-margin 
      corporate market, and technology companies may acquire high-margin 
      content businesses, such as newspapers. Some electrical utilities are 
      acquiring utilities in foreign countries where margins are higher. 

   o  TO ACQUIRE NEW TECHNOLOGY. In order to migrate from voice to data, 
      telecom equipment companies such as Lucent and Northern Telecom are 
      likely to acquire data networking companies. Large healthcare companies 
      are constantly buying or partnering with small biotech and medical 
      device companies. Indeed, healthcare is a two-tier sector consisting of 
      a gradually shrinking number of corporate giants and hundreds of small, 
      innovative companies that, if successful, are likely to be acquired by 
      the giants. 

   o  TO ACQUIRE STRATEGIC ASSETS that would be impossible to duplicate in a 
      timely manner--assets ranging from bank branches and store sites in 
      crowded cities, to AOL's proprietary spot on the Internet, to electric 
      utilities that would give energy firms access to major markets 
      undergoing deregulation. As the global shortage of high-tech workers 
      intensifies, companies may buy companies partly to acquire their 
      workforce. 

   o  TO KEEP COMPETITORS OUT OF YOUR BACKYARD. If you own an electric 
      utility, for example, the last thing you want is for a national energy 
      company to acquire the natural gas distributor in your area, securing a 
      business relationship with nearly all of your customers, which could be 
      used to sell electricity cheaper. It might well make sense to buy the 
      local gas company for defensive reasons. 


                                6           
<PAGE>

   o  TO RESPOND TO DEREGULATION, which is transforming the competitive 
      landscape in some of America's biggest industries--finance, 
      telecommunications, natural gas utilities and electrical utilities, 
      which collectively account for about 30% of S&P 500 earnings. 

   o  TO EXPAND INTERNATIONALLY. Often the best way to expand overseas is to 
      buy foreign firms that possess not only factories, products and 
      employees but also expertise in local business practices and consumer 
      preferences as well as contacts with suppliers, distributors and 
      government regulators. 

PLAYING THE "POWER GRAB" 

   Because acquisitions are likely to play a central role in stock market 
investing over the next few years, PaineWebber's research analysts have 
selected certain stocks in the industries listed below which they believe are 
likely acquisition candidates over the next several years. In PaineWebber's 
search for such stocks, there was no particular bias toward large 
capitalization or small capitalization issues. These are common stocks issued 
by companies who may receive income and derive revenues from multiple 
industry sources but whose primary industry is listed in the "Schedule of 
Investments." 


   
<TABLE>
<CAPTION>
                              APPROXIMATE PERCENT OF AGGREGATE 
   PRIMARY INDUSTRY SOURCE        MARKET VALUE OF THE TRUST 
- ----------------------------  -------------------------------- 
<S>                           <C>
Appliances ..................                1.42% 
Applications Software .......                4.28% 
Auto/Truck Parts & 
 Equipment...................                5.00% 
Cellular Communications  ....                4.32% 
Computers ...................                5.70% 
Containers ..................                2.85% 
Data Processing/Management  .                1.43% 
Direct Marketing ............                1.42% 
Drug Delivery Systems........                1.43% 
Electric.....................                4.31% 
Electronics .................                4.98% 
Finance .....................               12.92% 
Food.........................                2.85% 
Gas Distribution.............                4.25% 
Internet Software............                1.31% 
Machinery....................                2.87% 
Medical......................               11.49% 
Manufacturing................                1.43% 
Networking Products..........                5.71% 
Oil..........................                5.72% 
Publishing...................                2.84% 
Seismic Data Collection .....                1.41% 
Soap & Cleaning 
 Preparations................                2.88% 
Telecommunications...........                7.18% 
</TABLE>
    


   The Stocks may also be grouped into broader industry sectors which present 
certain acquisition opportunities as discussed below. 

POSSIBLE TAKEOVER ACTIVITY BY INDUSTRY 
   
AUTOS AND AUTO PARTS 
    
   The "Big Three" (Ford, Chrysler and General Motors) have significant 
amounts of cash but are more likely to spend it on building plants in 
emerging markets than on acquisitions. But auto parts is rapidly 

                                7           
<PAGE>
   
consolidating because auto makers want fewer suppliers that are bigger and 
smarter. Current valuation parameters suggest that ARVIN INDUSTRIES, EXCEL 
INDUSTRIES, STANDARD PRODUCTS and WALBRO are acquisition candidates. Deals 
have been occurring at 70% of trailing sales and 7.4x trailing "earnings 
before interest, taxation, depreciation and amortization" ("EBITDA"). 

ENERGY 
    

   PaineWebber believes that large integrated oil companies are unlikely to 
make huge acquisitions. Their capital is better spent developing properties. 
However, one of the smaller companies, UNOCAL, might be acquired. 

   But M&A should be plentiful in the Exploration & Production sector, where 
NUEVO ENERGY and SANTA FE ENERGY are takeover candidates. The oil service 
industry is consolidating as firms attempt to gain pricing power, secure 
top-line growth and acquire new technology. VERITAS and WESTERN ATLAS are 
likely to be acquired for their seismic technology. 
   
FINANCIALS 
    
   PaineWebber believes that there will be more consolidation in banks, S&Ls 
(savings & loans), life insurance and REITs (real estate investment trusts) 
as firms search for economies of scale in technology, branding, etc. Banks 
can afford to pay up for good targets because most deals are for 
stock-for-stock, and P/Es of acquirers are rising. 

Acquisition candidates include H.F. AHMANSON, BENEFICIAL CORP., FIRST 
CHICAGO, FLEET FINANCIAL, GOLDEN STATE BANCORP, MELLON BANK, MONEY STORE, 
SOUTHTRUST and STATE STREET. 
   
HEALTHCARE 

   Healthcare is a two-tier sector comprising of a limited group of big 
companies and hundreds of small ones that are either in the development stage 
or have a few products on the market. This two-tier sector has hundreds of 
small innovative biotech and medical device companies that might be bought 
by, or collaborate with, large firms. PaineWebber believes that ALKERMES, 
GENZYME TRANSGENICS and TEXAS BIOTECHNOLOGY CORP. are likely to form 
collaborations that would boost their share prices; acquisition targets 
include CARDIOTHORACIC, ECLIPSE SURGICAL, HEARTPORT, ST. JUDE MEDICAL and 
SOFAMOR/DANEK GROUP. The drug industry is relatively fragmented, with the 
largest firm's global market share under 5%. Drug companies tend to merge 
when the new product flow dries up; SCHERING-PLOUGH and WARNER-LAMBERT may 
eventually merge with other firms. 

HOUSEHOLD PRODUCTS 
    
   PaineWebber believes that U.S. household products' firms are making 
acquisitions to grow the top line in a mature industry. Buying makes more 
sense than building (e.g., introducing new brands) in this industry because 
history has shown that 90% of all brands ultimately fail, only 4% of brands 
generate sales of more than $20 million, and only 0.4% of brands generate 
sales of more than $100 million. 

   Clorox might buy CHURCH & DWIGHT; Colgate could merge with CLOROX. 
SUNBEAM-OSTER will likely acquire or be acquired while SAMSONITE is likely to 
be bought. 
   
MACHINERY 
    
   PaineWebber believes that many of the machinery companies are generating 
considerable free cash flow. With debt already low, firms are using this cash 
primarily to repurchase shares and make acquisitions. 

                                8           
<PAGE>
   
   Two logical acquisitions for Caterpillar would be HARNISCHFEGER, the 
dominant maker of mining equipment, and NEW HOLLAND, number two in 
agricultural equipment. 

PACKAGING 
    
   PaineWebber believes that the packaging industry is consolidating as firms 
seek economies of scale. BEMIS and SHOREWOOD PACKAGING could be bought by 
larger paperboard companies that want to enter a higher value-added business 
that is taking share from paperboard. 
   
RETAILING 

   PaineWebber believes that the supermarket industry is consolidating as 
firms seek economies of scale, particularly in technology. Most larger firms 
could make acquisitions; two likely targets are DOMINICK'S SUPERMARKETS and 
HANNAFORD BROTHERS. 

TECHNOLOGY/MEDIA/TELECOM 
    
   PaineWebber believes that industries are converging as firms make deals to 
enter higher-margin businesses. Tech firms may acquire content providers such 
as newspapers (KNIGHT-RIDDER) and Internet firms (AMERICA ONLINE). Cendant, 
created by the merger of CUC International and HFS, should prosper as true 
synergies are realized; Cendant will make acquisitions, possibly CATALINA 
MARKETING and READERS DIGEST. Companies expanding into the high-margin 
corporate market might acquire BAAN, CLARIFY, DATA GENERAL, DIGITAL 
EQUIPMENT, PEOPLESOFT, STRATUS and VANTIVE. Four consolidating industries 
are: 

   o  Networking equipment to enter the fast-growing data networking market, 
      major telecom equipment firms may acquire ASCEND COMMUNICATIONS, BAY 
      NETWORKS, CABLETRON SYSTEMS or FORE SYSTEMS. (Separately, Ascend could 
      look to buy XYLAN.) 

   o  Semiconductor equipment: CREDENCE SYSTEMS, ETEC SYSTEMS, GENUS and LTX 
      CORP may be bought. 

   o  Wireless services: AIRTOUCH, CENTURY TELEPHONE, PRICELLULAR and 360 
      COMMUNICATIONS could merge; AT&T might acquire PRICELLULAR; foreign 
      firms might buy AIRTOUCH, NEXTEL or 360 COMMUNICATIONS. 

   o  Telecommunications: GTE, TELEPORT and U.S. WEST are logical acquisition 
      candidates as the sector consolidates. 
   
UTILITIES 
    
   PaineWebber observes that traditionally, the natural gas and electric 
utility industries have been separate and have been regulated at the federal 
and state level. This arrangement left the industry fragmented, preventing 
economies of scale. In the absence of competition, there was no incentive for 
utilities to cut costs, because companies were paid a regulated rate of 
return on their asset bases. Greater assets meant higher profits. 
   
   Gradually, however, the electric utility and natural gas industries are 
simultaneously deregulating and converging--a tremendously complex process 
that should eventually cut electricity prices about 25%. Takeover candidates 
include IDAHO POWER, NEW YORK STATE ELECTRIC AND GAS and NIPSCO, which 
provide an entrance to major electricity markets that are being deregulated. 
Recent takeover premiums have been 30-40%. Gas companies that may be bought 
are CONSOLIDATED NATURAL GAS; MCN ENERGY; and SONAT. 
    

                                9           
<PAGE>

   ADDITIONAL DEPOSITS. After the first deposit on the Initial Date of 
Deposit the Sponsor may, from time to time, cause the deposit of additional 
Securities in the Trust where additional Units are to be offered to the 
public, maintaining, as closely as practicable, the original percentage 
relationships between the number of shares of Stock deposited on the Initial 
Date of Deposit, subject to certain adjustments. Costs incurred in acquiring 
such additional Stocks will be borne by the Trust. Unitholders will 
experience a dilution of their investment as a result of such brokerage fees 
and other expenses paid by the Trust during additional deposits of Securities 
purchased by the Trustee with cash or cash equivalents pursuant to 
instructions to purchase such Securities. (See "The Trust" and "Risk Factors 
and Special Considerations".) 


   TERMINATION. Unless advised to the contrary by the Sponsor, the Trustee 
will begin to sell the Securities held in the Trust twenty days prior to the 
Mandatory Termination Date. Moneys held upon such sale or maturity of 
Securities will be held in non-interest bearing accounts created by the 
Indenture until distributed and will be of benefit to the Trustee. The Trust 
will terminate approximately five (5) years after the Initial Date of Deposit 
regardless of market conditions at the time. (See "Termination of the Trust" 
and "Federal Income Taxes".) 

   PUBLIC OFFERING PRICE. The Public Offering Price per Unit is computed by 
dividing the Trust Fund Evaluation by the number of Units outstanding and 
then adding a sales charge of 3.75% of the Public Offering Price (3.90% of 
the net amount invested). The sales charge is reduced on a graduated scale 
for volume purchasers and is reduced for certain other purchasers. Units are 
offered at the Public Offering Price computed as of the Evaluation Time for 
all sales subsequent to the previous evaluation. The Public Offering Price on 
the Initial Date of Deposit, and on subsequent dates, will vary from the 
Public Offering Price set forth on page 2. (See "Public Offering of 
Units--Public Offering Price".) 

   
   DISTRIBUTIONS. The Stocks in the Trust were chosen for their potential as 
acquisition candidates, not for their income potential. The Trustee will make 
distributions, on the Distribution Dates. (See "Distributions" and 
"Administration of the Trust".) Unitholders may elect to have their Income 
Account distributions automatically reinvested into additional Units of the 
Trust at no sales charge (see "Reinvestment Plan"). Upon termination of the 
Trust, the Trustee will distribute to each Unitholder of record on such date 
his pro rata share of the Trust's assets, less expenses. The sale of 
Securities in the Trust in the period prior to termination and upon 
termination may result in a lower amount than might otherwise be realized if 
such sale were not required at such time due to impending or actual 
termination of the Trust. For this reason, among others, the amount realized 
by a Unitholder upon termination may be less than the amount paid by such 
Unitholder. 
    

   MARKET FOR UNITS. The Sponsor, though not obligated to do so, presently 
intends to maintain a secondary market for Units. The public offering price 
in the secondary market will be based upon the value of the Securities next 
determined after receipt of a purchase order, plus the applicable sales 
charge. (See "Public Offering of Units--Public Offering Price" and 
"Valuation".) If a secondary market is not maintained, a Unitholder may 
dispose of his Units only through redemption. With respect to redemption 
requests in excess of $100,000, the Sponsor may determine in its sole 
discretion to direct the Trustee to redeem units "in kind" by distributing 
Securities to the redeeming Unitholder. (See "Redemption".) 

                               10           
<PAGE>
THE TRUST 

   
   The Trust is one of a series of similar but separate unit investment 
trusts created under New York law by the Sponsor pursuant to a Trust 
Indenture and Agreement * (the "Indenture") dated as of the Initial Date of 
Deposit, between PaineWebber Incorporated, as Sponsor and Investors Bank & 
Trust Company, as Trustee (the "Trustee"). The objective of the Trust is 
capital appreciation through an investment principally in equity stocks 
having, in Sponsor's opinion on the Initial Date of Deposit, potential for 
capital appreciation. Of course, there can be no assurance that the objective 
of the Trust will be achieved. 
    
   On the Initial Date of Deposit, the Sponsor deposited with the Trustee 
confirmations of contracts for the purchase of Stocks together with an 
irrevocable letter or letters of credit of a commercial bank or banks in an 
amount at least equal to the purchase price. The value of the Securities was 
determined on the basis described under "Valuation". In exchange for the 
deposit of the contracts to purchase Securities, the Trustee delivered to the 
Sponsor a receipt for Units representing the entire ownership of the Trust. 

   With the deposit on the Initial Date of Deposit, the Sponsor established a 
proportionate relationship between the Securities in the Trust (determined by 
reference to the number of shares of each issue of Stock). The Sponsor may, 
from time to time, cause the deposit of additional Securities in the Trust 
when additional Units are to be offered to the public or pursuant to the 
Reinvestment Plan, maintaining as closely as practicable the original 
percentage relationship between the Securities deposited on the Initial Date 
of Deposit and replicating any cash or cash equivalents held by the Trust 
(net of expenses). The original proportionate relationship is subject to 
adjustment to reflect the occurrence of a stock split or a similar event 
which affects the capital structure of the issuer of a Stock but which does 
not affect the Trust's percentage ownership of the common stock equity of 
such issuer at the time of such event, to reflect a sale or maturity of 
Security or to reflect a merger or reorganization. Stock dividends issued in 
lieu of cash dividends, if any, received by the Trust will be sold by the 
Trustee and the proceeds therefrom shall be added to the Income Account. (See 
"Administration of the Trust" and "Reinvestment Plan"). 


   On the Initial Date of Deposit each Unit represented the fractional 
undivided interest in the Securities and net income of the Trust set forth 
under "Essential Information Regarding the Trust". However, if additional 
Units are issued by the Trust (through the deposit of additional Securities 
for purposes of the sale of additional Units or pursuant to the Reinvestment 
Plan), the aggregate value of Securities in the Trust will be increased and 
the fractional undivided interest represented by each Unit in the balance 
will be decreased. If any Units are redeemed, the aggregate value of 
Securities in the Trust will be reduced, and the fractional undivided 
interest represented by each remaining Unit in the balance will be increased. 
Units will remain outstanding until redeemed upon tender to the Trustee by 
any Unitholder (which may include the Sponsor) or until the termination of 
the Trust. (See "Termination of the Trust".) 


   The Stocks have been selected for their capital appreciation potential in 
light of the Sponsor's opinion, on the Initial Date of Deposit, that the 
issuers of such Stocks may be attractive acquisition candidates pursuant to 
mergers, acquisitions and tender offers. In general, tender offers involve a 
bid by an issuer or other acquiror to acquire a stock pursuant to the terms 
of its offer. Payment generally takes the form of cash, securities (typically 
bonds or notes), or cash and securities. Pursuant to federal law a tender 
offer must remain open for at least 20 days and withdrawal rights apply 
during the entire offering period. Frequently offers are conditioned upon a 
specified number of shares being tendered and upon the obtaining of 
financing. There may be other conditions to the tender offer as well. 
Additionally, an offeror 

- ------------ 
*Reference is hereby made to said Trust Indenture and Agreement and any 
statements contained herein are qualified in their entirety by the provisions 
of said Trust Indenture and Agreement. 

                               11           
<PAGE>

may only be willing to accept a specified number of shares. In the event a 
greater number of shares is tendered, the offeror must take up and pay for a 
pro rata portion of the shares deposited by each depositor during the period 
the offer remains open. 
   
   Because the Stocks have been selected with a view to potential 
acquisition, the Indenture sets forth criteria to be applied in the event of 
a tender offer, merger or reorganization. The Trust is not managed and has 
been structured with certain automatic provisions contained in the Indenture. 
The foregoing may interfere with the Trust's ability to maximize its 
objectives and, consequently, a Unitholder's value. In such case, Unitholders 
shall have no rights against the Trust, the Sponsor, the Trustee or any other 
party associated with the Trust. The foregoing is not a disclaimer of 
responsibilities under Section 36 of the Investment Company Act of 1940. 

   In the event a tender offer is made for a Stock, on the third business day 
prior to the expiration of the best tender offer then in effect, as 
determined by the Sponsor, the Sponsor will instruct the Trustee, and the 
Trustee will, tender the Stock; provided, however that the Trustee will sell 
the Stock on such date if it can realize at least 90% of the value of the 
price to be paid pursuant to the tender offer (such value to be determined by 
the Sponsor) except where the best tender offer is an offer for any and all 
outstanding Stock and is not conditioned upon the offeror's receipt of 
financing. In the event the Trustee has tendered and, in Sponsor's opinion, a 
better offer is made prior to the expiration of the prior offer, the Trustee 
will use its best efforts to exercise its withdrawal rights and follow the 
procedures set forth in the preceding sentence. Upon consummation of the 
tender offer, in the event any of the Stock tendered is not purchased (which 
could occur if such Stock is excluded due to pro rationing) the Trustee will 
sell the Stock as soon as practicable. Any securities received pursuant to a 
consummated tender offer will be sold by the Trustee as soon as practicable. 
If a tender offer fails, the Stock will be returned to the Trust. The 
Trustee, pursuant to the terms of the Indenture, will not tender or sell any 
Stock subject to a tender offer during any period in which the Trustee is 
purchasing Stock to create additional Units, except in those cases where, 
pursuant to the Reinvestment Plan, the Trustee creates additional Units on an 
Income Account Distribution Date. In such event, the Trustee shall not 
include such Stock subject to sale or tender on such date in the deposit of
additional Securities but shall adjust the Percentage Ratios so that the 
Trust's percentage ownership shall be allocated on a pro-rata basis to the 
remaining Securities held in the Trust Fund. 
    
   In the event an issuer of a Stock announces a proposed merger into another 
company and certain compensation is to be paid in exchange for the Stock, or 
in the event the issuer of a Stock announces a sale of substantially all of 
its assets, the Trustee will sell the Stock if it can realize 90% of the 
value to be received by shareholders upon completion of the merger or sale 
(such value to be determined by the Sponsor). If the Trust holds the Stock 
upon completion of the merger, any securities received as compensation will 
be sold by the Trustee as soon as practicable. In the event an issuer of 
Stock announces that another company will be merged into it, the Stock of 
such issuer will be retained unless the Sponsor directs the Trustee to sell 
the Stock for reasons set forth under the heading "Administration of the 
Trust--Portfolio Supervision." In the event of a corporate reorganization any 
securities received by the Trust will be sold as soon as practicable. 

   In its investment banking, underwriting or merchant banking activities the 
Sponsor may acquire material non-public information about an issuer of Stocks 
in the Trust. Use of this information by the Sponsor in connection with the 
Trust may constitute a violation of the federal securities laws. Therefore, 
in order to avoid the possible use of this information there may be 
circumstances where the Sponsor is unable to give advice to the Trust, 
including advice on the value of a transaction or whether an offer is the 
best offer. In such case the Sponsor shall immediately advise the Trustee of 
its inability and, in such 

                               12           
<PAGE>

event, (a) with respect to a tender offer, the Trustee is required to sell 
the applicable Stock as close to the opening of the stock exchanges as is 
practicable on the last business day a tender offer is in effect and (b) with 
respect to a sale of substantially all of an issuer's assets or its merger 
into another issuer, the Trust will continue to hold the Stocks. 

   In most circumstances the Trust has been structured to provide for the 
sale of Stock at 90% of the value to be received upon completion of a tender, 
merger or acquisition in order to provide the Trust a price close to the 
price which could be received in the future if certain conditions to such 
completion are met. The percentage accommodates a discount reflecting the 
time value of money and the uncertainties of the tender, merger or 
acquisition taking place. 

   There is no guarantee that there will be a tender offer for any of the 
Stocks, or merger or acquisition of any of the issuers whose stock is 
contained in the Trust. In addition, it is possible that legislation or 
regulations affecting merger and acquisition activity in the future may be 
passed and, if passed, the Sponsor cannot predict the impact upon the Trust. 
There is also no guarantee that the price received upon sale or pursuant to 
an acquisition will be the best price which could be received by the Trust at 
any time. For example, after stock is sold, the value may increase due to 
general market factors or due to subsequent tender offers. Additionally, the 
price of a Stock may decline for Stocks not taken up pursuant to a tender 
offer or in the event a merger or acquisition is not completed. 


RISK FACTORS AND SPECIAL CONSIDERATIONS 

   An investment in Units of the Trust should be made with an understanding 
of the risks inherent in an investment in common stocks in general. The 
general risks are associated with the rights to receive payments from the 
issuer which are generally inferior to creditors of, or holders of debt 
obligations or preferred stocks issued by, the issuer. Holders of common 
stocks have a right to receive dividends only when and if, and in the 
amounts, declared by the issuer's board of directors and to participate in 
amounts available for distribution by the issuer only after all other claims 
against the issuer have been paid or provided for. By contrast, holders of 
preferred stocks have the right to receive dividends at a fixed rate when and 
as declared by the issuer's board of directors, normally on a cumulative 
basis, but do not participate in other amounts available for distribution by 
the issuing corporation. Dividends on cumulative preferred stock must be paid 
before any dividends are paid on common stock. Preferred stocks are also 
entitled to rights on liquidation which are senior to those of common stocks. 
For these reasons, preferred stocks generally entail less risk than common 
stocks. 

   Common stocks do not represent an obligation of the issuer. Therefore they 
do not offer any assurance of income or provide the degree of protection of 
debt securities. The issuance of debt securities or even preferred stock by 
an issuer will create prior claims for payment of principal, interest and 
dividends which could adversely affect the ability and inclination of the 
issuer to declare or pay dividends on its common stock or the rights of 
holders of common stock with respect to assets of the issuer upon liquidation 
or bankruptcy. Unlike debt securities which typically have a stated principal 
amount payable at maturity, common stocks do not have a fixed principal 
amount or a maturity. Additionally, the value of the Stocks in the Trust may 
be expected to fluctuate over the life of the Trust. 


   In addition, there are investment risks common to all equity issues. The 
Stocks may appreciate or depreciate in value depending upon a variety of 
factors, including the full range of economic and market influences affecting 
corporate profitability, the financial condition of issuers, changes in 
national or worldwide economic conditions, and the prices of equity 
securities in general and the Stocks in particular. Distributions of income, 
generally made by declaration of dividends, is also dependent upon several 
factors, including those discussed above in the preceding sentence. 


                               13           
<PAGE>
   Investors should note that the creation of additional Units subsequent to 
the Initial Date of Deposit may have an effect upon the value of previously 
existing Units. To create additional Units the Sponsor may deposit cash (or 
cash equivalents, e.g., a bank letter of credit in lieu of cash) with 
instructions to purchase Securities in amounts sufficient to maintain, to the 
extent practicable, the percentage relationship among the Securities based on 
the price of the Securities at the Evaluation Time on the date the cash is 
deposited. To the extent the price of a Security increases or decreases 
between the time cash is deposited with instructions to purchase the Security 
and the time the cash is used to purchase the Security, Units will represent 
less or more of that Security and more or less of the other Securities in the 
Trust. Unitholders will be at risk because of price fluctuations during this 
period since if the price of shares of a Security increases, Unitholders will 
have an interest in fewer shares of that Security, and if the price of a 
Security decreases, Unitholders will have an interest in more shares of that 
Security, than if the Security had been purchased on the date cash was 
deposited with instructions to purchase the Security. In order to minimize 
these effects, the Trust will attempt to purchase Securities as closely as 
possible to the Evaluation Time or at prices as closely as possible to the 
prices used to evaluate the Trust at the Evaluation Time. Thus price 
fluctuations during this period will affect the value of every Unitholder's 
Units and the income per Unit received by the Trust. In addition, costs 
incurred in connection with the acquisition of Securities will be at the 
expense of the Trust and will affect the value of every Unitholder's Units. 

   In the event a contract to purchase a Stock to be deposited on the Initial 
Date of Deposit or any other date fails, cash held or available under a 
letter or letters of credit, attributable to such failed contract may be 
reinvested in another stock or stocks having characteristics sufficiently 
similar to the Stocks originally deposited (in which case the original 
proportionate relationship shall be adjusted) or, if not so reinvested, 
distributed to Unitholders of record on the last day of the month in which 
the failure occurred. The distribution will be made twenty days following 
such record date and, in the event of such a distribution, the Sponsor will 
refund to each Unitholder the portion of the sales charge attributable to 
such failed contract. 


   BECAUSE THE TRUST IS ORGANIZED AS A UNIT INVESTMENT TRUST, RATHER THAN AS 
A MANAGEMENT INVESTMENT COMPANY, THE TRUSTEE AND THE SPONSOR DO NOT HAVE 
AUTHORITY TO MANAGE THE TRUST'S ASSETS FULLY IN AN ATTEMPT TO TAKE ADVANTAGE 
OF VARIOUS MARKET CONDITIONS TO IMPROVE THE TRUST'S NET ASSET VALUE, BUT MAY 
DISPOSE OF SECURITIES ONLY UNDER LIMITED CIRCUMSTANCES. (SEE THE DISCUSSION 
ABOVE UNDER THE CAPTION "THE TRUST" RELATING TO DISPOSITION OF STOCKS WHICH 
MAY BE THE SUBJECT OF A TENDER OFFER, MERGER OR REORGANIZATION AND ALSO THE 
DISCUSSION UNDER THE CAPTION "ADMINISTRATION OF THE TRUST--PORTFOLIO 
SUPERVISION".) 


FEDERAL INCOME TAXES 


   The Trust intends to qualify for and elect tax treatment as a "regulated 
investment company" under the Internal Revenue Code of 1986, as amended (the 
"Code"). By qualifying for and electing such treatment, subject to certain 
conditions and requirements, the Trust will not be subject to federal income 
tax to the extent its income is distributed to Unitholders in a timely 
manner. Any undistributed income may be subject to tax, including a four 
percent (4%) excise tax imposed by Section 4982 of the Code on certain 
undistributed income of a regulated investment company that does not 
distribute to shareholders in a timely manner at least ninety-eight percent 
(98%) of its taxable income (including capital gains). The Trust intends to 
distribute all of its income, including capital gains, annually. 

   The gross income of the Trust typically will include dividends, interest 
and gains on sales or other dispositions of Securities. In order to qualify 
as a "regulated investment company", the Trust must, among 


                               14           
<PAGE>
other things (1) in the course of a taxable year derive at least 90% of its 
gross income from dividends, interest, gains on sales or other dispositions 
of Securities and certain other sources (referred to herein as "eligible 
sources"), (2) meet certain diversification tests, and (3) distribute in each 
year at least 90% of its investment company taxable income. If during a 
taxable year it appears that less than 90% of the Trust income will be 
derived from eligible sources, the Sponsor may direct the Trustee to sell 
Securities which, upon the realization of sufficient aggregate gain, will 
enable the Trust to maintain its qualification as a regulated investment 
company. 

   In any taxable year, the distributions of any ordinary income (such as 
dividends) and the excess of net short-term capital gains over net long-term 
capital losses will be taxable as ordinary income to Unitholders. A 
distribution paid shortly after a purchase of shares may be taxable even 
though, in effect, it may represent a return of capital to Unitholders. A 
dividend paid by the Trust in January will be considered for federal income 
tax purposes to have been paid by the Trust and received by the Unitholders 
on the preceding December 31, if the dividend was declared in the preceding 
October, November or December to Unitholders of record in any one of those 
months. Distributions which are taxable as ordinary income to Unitholders 
will not constitute dividends for purposes of the dividends-received 
deduction for corporations except for, and only to the extent of, a specific 
designation by the Trust. 


   Distributions by the Trust that are designated by it as "net capital gain" 
will be taxable to Unitholders as long-term capital gain, regardless of the 
length of time the Units have been held by a Unitholder. Distributions will 
not be taxable to Unitholders to the extent that they represent a return of 
capital; such distributions will, however, reduce a Unitholder's basis in his 
Units, and to the extent they exceed the basis of his Units will be treated 
as a gain from the sale of his Units. Any loss realized by a Unitholder on 
the sale or exchange of Units that are held by him for not more than six 
months will be treated as a long-term capital loss to the extent of any 
long-term capital gain distributions paid to such Unitholder with respect to 
such Units. 

   Under the Taxpayer Relief Act of 1997, capital gains realized on the sale 
of property held for more than one year but not more than eighteen months are 
considered "mid-term gains." In the case of individuals, mid-term gains are 
taxed at lower rates than ordinary income, but not as favorably as capital 
gains on property held for more than eighteen months. The Trustee will 
identify in the annual tax information statement mailed to Unitholders the 
portion of capital gain dividends which are considered mid-term gains. 


   Unitholders will be taxed in the manner described above regardless of 
whether distributions from the Trust are actually received by the Unitholder 
or are reinvested pursuant to the Reinvestment Plan. 

   Withholding For Citizen or Resident Investors. In the case of any 
noncorporate Unitholder that is a citizen or resident of the United States, a 
31 percent "backup" withholding tax will apply to certain distributions of 
the Trust unless the Unitholder properly completes and files under penalties 
of perjury, IRS Form W-9 (or its equivalent). 

   The foregoing discussion of taxation is a general summary and relates only 
to certain aspects of the federal income tax consequences of an investment in 
the Trust for Unitholders that hold their Units as capital assets. 
Unitholders may also be subject to state and local taxation. Each Unitholder 
should consult its own tax advisor regarding the Federal, state and local tax 
consequences to it of ownership of Units. 

   Investment in the Trust may be suited for purchase by funds and accounts 
of individual investors that are exempt from federal income taxes such as 
Individual Retirement Accounts, tax-qualified retirement plans including 
Keogh Plans, and other tax-deferred retirement plans. Unitholders desiring to 
purchase 

                               15           
<PAGE>
Units for tax-deferred plans and IRA's should consult their PaineWebber 
Investment Executive for details on establishing such accounts. Units may 
also be purchased by persons who already have self-directed accounts 
established under tax-deferred retirement plans. 

PUBLIC OFFERING OF UNITS 

   Public Offering Price. The public offering price per Unit is based on the 
aggregate market value of the Securities, next determined after the receipt 
of a purchase order, divided by the number of Units outstanding plus the 
sales charge set forth below. The public offering price per Unit is computed 
by dividing the Trust Fund Evaluation, next determined after receipt of a 
purchase order by the number of Units outstanding plus the sales charge. (See 
"Valuation".) The Public Offering Price on the Initial Date of Deposit or on 
any subsequent date will vary from the Public Offering Price calculated on 
the business day prior to the Initial Date of Deposit (as set forth on page 2 
hereof) due to fluctuations in the value of the Stocks among other factors. 

   Sales Charge and Volume Discount. The Public Offering Price of Units of 
the Trust includes a sales charge which varies based upon the number of Units 
purchased by a single purchaser. (See the sales charge schedule set forth 
below.) During the initial public offering period, the sales charge will be 
based on the number of Trust Units purchased on the same or any preceding day 
by a single purchaser. Such purchaser or his dealer must notify the Sponsor 
at the time of purchase of any previous purchase of Trust Units in order to 
aggregate all such purchases and must supply the Sponsor with sufficient 
information to permit confirmation of such purchaser's eligibility; 
acceptance of such purchase order is subject to confirmation. Purchases of 
Units of other trusts may not be aggregated with purchases of Trust Units to 
qualify for this procedure. This procedure may be amended or terminated at 
any time without notice. In the event of such termination, the procedure will 
revert to that stated under the sales charge schedule referred to below. 

   Sales charges during the initial public offering period and for secondary 
market sales are set forth below. A discount in the sales charge is available 
to volume purchasers of Units due to economies of scale in sales effort and 
sales related expenses relating to volume purchases. The sales charge 
applicable to volume purchasers of Units is reduced on a graduated scale for 
sales to any person of at least $50,000 or 5,000 Units, applied on whichever 
basis is more favorable to the purchaser. 

        INITIAL PUBLIC OFFERING PERIOD AND SECONDARY MARKET THEREAFTER 

<TABLE>
<CAPTION>
                                   PERCENT OF 
                                     PUBLIC      PERCENT OF 
                                    OFFERING     NET AMOUNT 
AGGREGATE DOLLAR VALUE OF UNITS*      PRICE       INVESTED 
- --------------------------------  ------------ ------------ 
<S>                               <C>          <C>
Less than $50,000................     3.75%         3.90% 
$50,000 to 99,999................     3.50          3.63 
$100,000 to 199,999..............     3.25          3.36 
$200,000 to 399,999..............     2.75          2.83 
$400,000 to 499,999..............     2.50          2.56 
$500,000 to 999,999..............     2.00          2.04 
$1,000,000 or more ..............     1.75          1.78 
<FN>
- ------------ 
*     The sales charge applicable to volume purchasers according to the table 
      above will be applied either on a dollar or Unit basis, depending upon 
      which basis provides a more favorable purchase price to the purchaser. 
</TABLE>

                               16           
<PAGE>
   The volume discount sales charge shown above will apply to all purchases 
of Units on any one day by the same person in the amounts stated herein, and 
for this purpose purchases of Units of this Trust will be aggregated with 
concurrent purchases of any other trust which may be offered by the Sponsor. 
Units held in the name of the purchaser's spouse or in the name of a 
purchaser's child under the age of 21 are deemed for the purposes hereof to 
be registered in the name of the purchaser. The reduced sales charges are 
also applicable to a trustee or other fiduciary purchasing Units for a single 
trust estate or single fiduciary account. 

   No sales charge will be imposed on Units of the Trust acquired by 
Unitholders in connection with participation in the Reinvestment Plan (see 
"Reinvestment Plan"). 

   Employee Discount. Due to the realization of economies of scale in sales 
effort and sales related expenses with respect to the purchase of Units by 
employees of the Sponsor and its affiliates, the Sponsor intends to permit 
employees of the Sponsor and its affiliates and certain of their relatives to 
purchase units of the Trust at a reduced sales charge of $1.00 per 100 Units. 

   Exchange Option. Unitholders may elect to exchange any or all of their 
Units of this series for units of one or more of any series of PaineWebber 
Municipal Bond Fund (the "PaineWebber Series"); The Municipal Bond Trust (the 
"National Series"); The Municipal Bond Trust, Multi-State Program (the 
"Multi-State Series"); The Municipal Bond Trust, California Series (the 
"California Series"); The Corporate Bond Trust (the "Corporate Series"); 
PaineWebber Pathfinder's Trust (the "Pathfinder's Trust"); the PaineWebber 
Federal Government Trust (the "Government Series"); The Municipal Bond Trust, 
Insured Series (the "Insured Series"); or the PaineWebber Equity Trust (the 
"Equity Series") (collectively referred to as the "Exchange Trusts"), at a 
Public Offering Price for the Units of the Exchange Trusts to be acquired 
based on a reduced sales charge of $15 per Unit, per 100 Units in the case of 
a trust whose Units cost approximately $10 or per 1,000 units in the case of 
a trust whose Units cost approximately one dollar. Unitholders of this Trust 
are not eligible for the Exchange Option into an Equity Trust, Growth Stock 
Series designated as a rollover series for the 30 day period prior to 
termination of the Trust. The purpose of such reduced sales charge is to 
permit the Sponsor to pass on to the Unitholder who wishes to exchange Units 
the cost savings resulting from such exchange of Units. The cost savings 
result from reductions in time and expense related to advice, financial 
planning and operational expenses required for the Exchange Option. Each 
Exchange Trust has different investment objectives, therefore a Unitholder 
should read the prospectus for the applicable exchange trust carefully prior 
to exercising this option. Exchange Trusts having as their objective the 
receipt of tax-exempt interest income would not be suitable for tax-deferred 
investment plans such as Individual Retirement Accounts. A Unitholder who 
purchased Units of a series and paid a per Unit, per 100 Unit or per 1,000 
Unit sales charge that was less than the per Unit, per 100 Unit or per 1,000 
Unit sales charge of the series of the Exchange Trusts for which such 
Unitholder desires to exchange into, will be allowed to exercise the Exchange 
Option at the Unit Offering Price plus the reduced sales charge, provided the 
Unitholder has held the Units for at least five months. Any such Unitholder 
who has not held the Units to be exchanged for the five-month period will be 
required to exchange them at the Unit Offering Price plus a sales charge 
based on the greater of the reduced sales charge, or an amount which, 
together with the initial sales charge paid in connection with the 
acquisition of the Units being exchanged, equals the sales charge of the 
series of the Exchange Trust for which such Unitholder desires to exchange 
into, determined as of the date of the exchange. 

   The Sponsor will permit exchanges at the reduced sales charge provided 
there is either a primary market for Units or a secondary market maintained 
by the Sponsor in both the Units of this series and units of the applicable 
Exchange Trust and there are units of the applicable Exchange Trust available 
for 

                               17           
<PAGE>
sale. While the Sponsor has indicated that it intends to maintain a market 
for the Units of the respective Trusts, there is no obligation on its part to 
maintain such a market. Therefore, there is no assurance that a market for 
Units will in fact exist on any given date at which a Unitholder wishes to 
sell his Units of this series and thus there is no assurance that the 
Exchange Option will be available to a Unitholder. Exchanges will be effected 
in whole Units only. Any excess proceeds from Unitholders' Units being 
surrendered will be returned. Unitholders will be permitted to advance new 
money in order to complete an exchange to round up to the next highest number 
of Units. An exchange of Units pursuant to the Exchange Option generally will 
constitute a "taxable event" under the Code, i.e., a Unitholder will 
recognize a tax gain or loss at the time of exchange. Unitholders are urged 
to consult their own tax advisors as to the tax consequences to them of 
exchanging Units in particular cases. 

   The Sponsor reserves the right to modify, suspend or terminate this 
Exchange Option at any time with notice to Unitholders. In the event the 
Exchange Option is not available to a Unitholder at the time he wishes to 
exercise it, the Unitholder will be immediately notified and no action will 
be taken with respect to his Units without further instruction from the 
Unitholder. 

   To exercise the Exchange Option, a Unitholder should notify the Sponsor of 
his desire to exercise the Exchange Option and to use the proceeds from the 
sale of his Units to the Sponsor of this series to purchase Units of one or 
more of the Exchange Trusts from the Sponsor. If Units of the applicable 
outstanding series of the Exchange Trust are at that time available for sale, 
and if such Units may lawfully be sold in the state in which the Unitholder 
is resident, the Unitholder may select the series or group of series for 
which he desires his investment to be exchanged. The Unitholder will be 
provided with a current prospectus or prospectuses relating to each series in 
which he indicates interest. 

   The exchange transaction will operate in a manner essentially identical to 
any secondary market transaction, i.e., Units will be repurchased at a price 
based on the market value of the Securities in the portfolio of the Trust 
next determined after receipt by the Sponsor of an exchange request and 
properly endorsed documents. Units of the Exchange Trust will be sold to the 
Unitholder at a price based upon the next determined market value of the 
Securities in the Exchange Trust plus the reduced sales charge. Exchange 
transactions will be effected only in whole units; thus, any proceeds not 
used to acquire whole units will be paid to the selling Unitholder. 

   For example, assume that a Unitholder, who has three thousand units of a 
trust with a current price of $1.30 per unit, desires to sell his units and 
seeks to exchange the proceeds for units of a series of an Exchange Trust 
with a current price of $890 per Unit based on the bid prices of the 
underlying securities. In this example, which does not contemplate any 
rounding up to the next highest number of Units, the proceeds from the 
Unitholder's Units would aggregate $3,900. Since only whole units of an 
Exchange Trust may be purchased under the Exchange Option, the Unitholder 
would be able to acquire four Units in the Exchange Trust for a total cost of 
$3,620 ($3,560 for the Units and $60 for the sales charge). If all 3,000 
Units were tendered, the remaining $280 would be returned to the Unitholder. 

   Conversion Option. Owners of units of any registered unit investment trust 
sponsored by others which was initially offered at a maximum applicable sales 
charge of at least 3.0% (a "Conversion Trust") may elect to apply the cash 
proceeds of the sale or redemption of those units directly to acquire 
available units of any Exchange Trust at a reduced sales charge of $15 per 
Unit, per 100 Units in the case of Exchange Trusts having a Unit price of 
approximately $10, or per 1,000 Units in the case of Exchange Trusts having a 
Unit price of approximately $1, subject to the terms and conditions 
applicable to the Exchange Option (except that no secondary market is 
required for Conversion Trust units). To exercise this option, the owner 
should notify his retail broker. He will be given a prospectus for each 
series in which 

                               18           
<PAGE>
he indicates interest and for which units are available. The dealer must sell 
or redeem the units of the Conversion Trust. Any dealer other than 
PaineWebber must certify that the purchase of the units of the Exchange Trust 
is being made pursuant to and is eligible for the Conversion Option. The 
dealer will be entitled to two thirds of the applicable reduced sales charge. 
The Sponsor reserves the right to modify, suspend or terminate the Conversion 
Option at any time with notice, including the right to increase the reduced 
sales charge applicable to this option (but not in excess of $5 more per 
Unit, per 100 Units or per 1,000 Units, as applicable than the corresponding 
fee then being charged for the Exchange Option). For a description of the tax 
consequences of a conversion reference is made to the Exchange Option section 
herein. 

   Distribution of Units. The minimum purchase in the initial public offering 
is $250. Only whole Units may be purchased. 

   The Sponsor is the sole underwriter of the Units. Sales may, however, be 
made to dealers who are members of the National Association of Securities 
Dealers, Inc. ("NASD") at prices which include a concession of $.30 per Unit 
at the highest sales charge, subject to change from time to time. The 
difference between the sales charge and the dealer concession will be 
retained by the Sponsor. In the event that the dealer concession is 90% or 
more of the sales charge per Unit, dealers taking advantage of such 
concession may be deemed to be underwriters under the Securities Act of 1933. 

   The Sponsor reserves the right to reject, in whole or in part, any order 
for the purchase of Units. The Sponsor intends to qualify the Units in all 
states of the United States, the District of Columbia and the Commonwealth of 
Puerto Rico. 

   Secondary Market for Units. While not obligated to do so, the Sponsor 
intends to maintain a secondary market for the Units and continuously offer 
to purchase Units at the Trust Fund Evaluation per Unit next computed after 
receipt by the Sponsor of an order from a Unitholder. The Sponsor may cease 
to maintain such a market at any time, and from time to time, without notice. 
In the event that a secondary market for the Units is not maintained by the 
Sponsor, a Unitholder desiring to dispose of Units may tender such Units to 
the Trustee for redemption at the price calculated in the manner set forth 
under "Redemption". Redemption requests in excess of $100,000 may be redeemed 
"in kind" as described under "Redemption." The Sponsor does not in any way 
guarantee the enforceability, marketability, value or price of any of the 
stocks in the Trust, nor that of the Units. 

   Investors should note the Trust Fund Evaluation per Unit at the time of 
sale or tender for redemption may be less than the price at which the Unit 
was purchased. 

   The Sponsor may redeem any Units it has purchased in the secondary market 
if it determines for any reason that it is undesirable to continue to hold 
these Units in its inventory. Factors which the Sponsor may consider in 
making this determination will include the number of units of all series of 
all trusts which it holds in its inventory, the saleability of the Units and 
its estimate of the time required to sell the Units and general market 
conditions. 

   A Unitholder who wishes to dispose of his Units should inquire of his bank 
or broker as to current market prices in order to determine if 
over-the-counter prices exist in excess of the redemption price and the 
repurchase price (see "Redemption"). 

   Sponsor's Profits. In addition to the applicable sales charge, the Sponsor 
realizes a profit (or sustains a loss) in the amount of any difference 
between the cost of the Stocks to the Sponsor and the price at which it 
deposits the Stocks in the Trust in exchange for Units, which is the value of 
the Stocks, determined by the Trustee as described under "Valuation". The 
cost of Stock to the Sponsor includes the amount paid by the Sponsor for 
brokerage commissions. These amounts are an expense of the Trust. 

                               19           
<PAGE>
   Cash, if any, received from Unitholders prior to the settlement date for 
the purchase of Units or prior to the payment for Securities upon their 
delivery may be used in the Sponsor's business subject to the limitations of 
Rule 15c3-3 under the Securities and Exchange Act of 1934 and may be of 
benefit to the Sponsor. 

   In selling any Units in the initial public offering after the Initial Date 
of Deposit, the Sponsor may realize profits or sustain losses resulting from 
fluctuations in the net asset value of outstanding Units during the period. 
In maintaining a secondary market for the Units, the Sponsor may realize 
profits or sustain losses in the amount of any differences between the price 
at which it buys Units and the price at which it resells or redeems such 
Units. 

REDEMPTION 

   Units may be tendered to Investors Bank & Trust Company for redemption at 
its office in person, or by mail at Hancock Towers, 200 Clarendon Street, 
Boston, MA 02116 upon payment of any transfer or similar tax which must be 
paid to effect the redemption. At the present time there are no such taxes. 
No redemption fee will be charged by the Sponsor or Trustee. If the Units are 
represented by a certificate it must be properly endorsed accompanied by a 
letter requesting redemption. If held in uncertificated form, a written 
instrument of redemption must be signed by the Unitholder. Unitholders must 
sign exactly as their names appear on the records of the Trustee with 
signatures guaranteed by an eligible guarantor institution or in such other 
manner as may be acceptable to the Trustee. In certain instances the Trustee 
may require additional documents such as, but not limited to, trust 
instruments, certificates of death, appointments as executor or 
administrator, or certificates of corporate authority. Unitholders should 
contact the Trustee to determine whether additional documents are necessary. 
Units tendered to the Trustee for redemption will be cancelled, if not 
repurchased by the Sponsor. 

   Units will be redeemed at the Redemption Value per Unit next determined 
after receipt of the redemption request in good order by the Trustee. The 
Redemption Value per Unit is determined by dividing the Trust Fund Evaluation 
by the number of Units outstanding. (See "Valuation".) 

   A redemption request is deemed received on the business day (see 
"Valuation" for a definition of business day) when such request is received 
prior to 4:00 p.m. If it is received after 4:00 p.m., it is deemed received 
on the next business day. During the period in which the Sponsor maintains a 
secondary market for Units, the Sponsor may repurchase any Unit presented for 
tender to the Trustee for redemption no later than the close of business on 
the second business day following such presentation and Unitholders will 
receive the Redemption Value next determined after receipt by the Trustee of 
the redemption request. Proceeds of a redemption will be paid to the 
Unitholder no later than the seventh calendar day following the date of 
tender (or if the seventh calendar day is not a business day on the first 
business day prior thereto). 

   With respect to cash redemptions, amounts representing income received 
shall be withdrawn from the Income Account, and, to the extent such balance 
is insufficient and for remaining amounts, from the Capital Account. The 
Trustee is empowered, to the extent necessary, to sell Securities to meet 
redemptions. The Trustee will sell Securities in such manner as is directed 
by the Sponsor. In the event no such direction is given, Stocks will be sold 
pro rata, to the extent possible, and if not possible Stocks having the 
greatest amount of capital appreciation will be sold first. (See 
"Administration of the Trust".) However, with respect to redemption requests 
in excess of $100,000, the Sponsor may determine in its discretion to direct 
the Trustee to redeem Units "in kind" by distributing Stocks to the redeeming 
Unitholder. When Stocks are so distributed, a proportionate amount of each 
Stock will be distributed, rounded to avoid the distribution of fractional 
shares and using cash or checks where rounding is not 

                               20           
<PAGE>
possible. The Sponsor may direct the Trustee to redeem Units "in kind" even 
if it is then maintaining a secondary market in Units of the Trust. 
Securities will be valued for this purpose as set forth under "Valuation". A 
Unitholder receiving a redemption "in kind" may incur brokerage or other 
transaction costs in converting the Stocks distributed into cash. The 
availability of redemption "in kind" is subject to compliance with all 
applicable laws and regulations, including the Securities Act of 1933, as 
amended. 

   To the extent that Securities are redeemed in kind or sold, the size and 
diversity of the Trust will be reduced. Sales will usually be required at a 
time when Securities would not otherwise be sold and may result in lower 
prices than might otherwise be realized. The price received upon redemption 
may be more or less than the amount paid by the Unitholder depending on the 
value of the Securities in the portfolio at the time of redemption. In 
addition, because of the minimum amounts in which Securities are required to 
be sold, the proceeds of sale may exceed the amount required at the time to 
redeem Units; these excess proceeds will be distributed to Unitholders on the 
Distribution Dates. 

   The Trustee may, in its discretion, and will, when so directed by the 
Sponsor, suspend the right of redemption, or postpone the date of payment of 
the Redemption Value, for more than seven calendar days following the day of 
tender for any period during which the New York Stock Exchange, Inc. is 
closed other than for weekend and holiday closings; or for any period during 
which the Securities and Exchange Commission determined that trading on the 
New York Stock Exchange, Inc. is restricted or for any period during which an 
emergency exists as a result of which disposal or evaluation of the 
Securities is not reasonably practicable; or for such other period as the 
Securities and Exchange Commission may by order permit for the protection of 
Unitholders. The Trustee is not liable to any person or in any way for any 
loss or damages which may result from any such suspension or postponement, or 
any failure to suspend or postpone when done in the Trustee's discretion. 

VALUATION 

   
   The Trustee will calculate the Trust's value (the "Trust Fund Evaluation") 
per Unit at the Evaluation Time set forth under "Summary of Essential 
Information Regarding the Trust" (1) on each business day as long as the 
Sponsor is maintaining a bid in the secondary market, (2) on the business day 
on which any Unit is tendered for redemption, (3) on any other day desired by 
the Sponsor or the Trustee and (4) upon termination, by adding (a) the 
aggregate value of the Securities and other assets determined by the Trustee 
as set forth below, (b) cash on hand in the Trust, including dividends 
receivable on Stock trading ex-dividend and income accrued held but not yet 
distributed (other than any cash held in any reserve account established 
under the Indenture or cash held for the purchase of Contract Securities) and 
(c) accounts receivable for Securities sold and any other assets of the Trust 
not included in (a) and (b) above, and deducting therefrom the sum of (v) 
taxes or other governmental charges against the Trust not previously 
deducted, (w) accrued fees and expenses of the Trustee and the Sponsor 
(including legal and auditing expenses) and other Trust expenses (x) cash 
allocated for distributions to Unitholders and (y) accounts payable for Units 
tendered for redemption and any other liabilities of the Trust Fund not 
included in (v), (w), (x) and (y) above. The per Unit Trust Fund Evaluation 
is calculated by dividing the result of such computation by the number of 
Units outstanding as of the date thereof. Business days do not include 
Saturdays, Sundays, New Year's Day, Martin Luther King, Jr. Day, Presidents' 
Day, Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day 
and Christmas Day and other days that the New York Stock Exchange is closed. 
    

   The value of Stocks shall be determined by the Trustee in good faith in 
the following manner: (1) if the domestic Stocks are listed on one or more 
national securities exchanges or on the National Market System maintained by 
the National Association of Securities Dealers Automated Quotations System, 

                               21           
<PAGE>

such evaluation shall be based on the closing sale price on that day (unless 
the Trustee deems such price inappropriate as a basis for evaluation) on the 
exchange which is the principal market thereof (deemed to be the New York 
Stock Exchange in the case of the domestic Stocks if such Stocks are listed 
thereon), (2) if there is no such appropriate closing sales price on such 
exchange or system, at the mean between the closing bid and asked prices on 
such exchange or system (unless the Trustee deems such price inappropriate as 
a basis for evaluation), (3) if the Stocks are not so listed or, if so listed 
and the principal market therefor is other than on such exchange or there are 
no such appropriate closing bid and asked prices available, such evaluation 
shall be made by the Trustee in good faith based on the closing sale price in 
the over-the-counter market (unless the Trustee deems such price 
inappropriate as a basis for evaluation) or (4) if there is no such 
appropriate closing price, then (a) on the basis of current bid prices, (b) 
if bid prices are not available, on the basis of current bid prices for 
comparable securities, (c) by the Trustee's appraising the value of the Stock 
in good faith on the bid side of the market or (d) by any combination 
thereof. The tender of a Stock pursuant to a tender offer will not affect the 
method of valuing such Stock. 


COMPARISON OF PUBLIC OFFERING PRICE AND REDEMPTION VALUE 


   The Stocks are valued on the same basis for the initial and secondary 
markets and for purposes of redemptions. On the business day prior to the 
Date of Deposit, the Public Offering Price per Unit (which figure includes 
the sales charge) exceeded the Redemption Value. (See "Essential 
Information"). The prices of Stocks are expected to vary. For this reason and 
others, including the fact that the Public Offering Price includes the sales 
charge, the amount realized by a Unitholder upon redemption of Units may be 
less than the price paid by the Unitholder for such Units. 


EXPENSES OF THE TRUST 

   The cost of the preparation and printing of the Indenture and this 
Prospectus, the initial fees of the Trustee and the Trustee's counsel, and 
expenses incurred in establishing the Trust, including legal and auditing 
fees (the "Organizational Expenses"), will be paid by the Trust, as is common 
for mutual funds. Historically, the Sponsors of Unit Trusts have paid all 
organizational expenses. The Sponsor will receive no fee from the Trust for 
its services in establishing the Trust. 

   The Sponsor will receive a fee, which is earned for portfolio supervisory 
services, and which is based upon the largest number of Units outstanding 
during the calendar year. The Sponsor's fee, which is not to exceed $.0035 
per Unit per calendar year, may exceed the actual costs of providing 
portfolio supervisory services for the Trust, but at no time will the total 
amount it receives for portfolio supervisory services rendered to all series 
of the PaineWebber Equity Trust in any calendar year exceed the aggregate 
cost to it of supplying such services in such year. 

   
   For its services as Trustee and Evaluator, the Trustee will be paid in 
monthly installments, annually $.0170 per Unit, based on the largest number 
of Units outstanding during the previous month. In addition, the regular and 
recurring expenses of the Trust are estimated to be $.0187 which include, but 
are not limited to Organizational Expenses of $.0080 per Unit, and certain 
mailing, printing, and audit expenses. Expenses in excess of this estimate 
will be borne by the Trust. The Trustee could also benefit to the extent that 
it may hold funds in non-interest bearing accounts created by the Indenture. 
    

   The Sponsor's fee and Trustee's fee may be increased without approval of 
the Unitholders by an amount not exceeding a proportionate increase in the 
category entitled "All Services Less Rent" in the Consumer Price Index 
published by the United States Department of Labor or, if the Price Index is 
no longer published, a similar index as determined by the Trustee and 
Sponsor. 

                               22           
<PAGE>
   In addition to the above, the following charges are or may be incurred by 
the Trust and paid from the Income Account, or, to the extent funds are not 
available in such Account, from the Capital Account (see "Administration of 
the Trust--Accounts"): (1) fees for the Trustee for extraordinary services; 
(2) expenses of the Trustee (including legal and auditing expenses) and of 
counsel; (3) various governmental charges; (4) expenses and costs of any 
action taken by the Trustee to protect the Trust and the rights and interests 
of the Unitholders; (5) indemnification of the Trustee for any loss, 
liabilities or expenses incurred by it in the administration of the Trust 
without gross negligence, bad faith or wilful misconduct on its part; (6) 
brokerage commissions and other expenses incurred in connection with the 
purchase and sale of Securities; and (7) expenses incurred upon termination 
of the Trust. In addition, to the extent then permitted by the Securities and 
Exchange Commission, the Trust may incur expenses of maintaining registration 
or qualification of the Trust or the Units under Federal or state securities 
laws so long as the Sponsor is maintaining a secondary market (including, but 
not limited to, legal, auditing and printing expenses). 

   The accounts of the Trust shall be audited not less than annually by 
independent public accountants selected by the Sponsor. The expenses of the 
audit shall be an expense of the Trust. So long as the Sponsor maintains a 
secondary market, the Sponsor will bear any annual audit expense which 
exceeds $.0050 per Unit. Unitholders covered by the audit during the year may 
receive a copy of the audited financial statements upon request. 

   
   The fees and expenses set forth above are payable out of the Trust and 
when unpaid will be secured by a lien on the Trust. Based upon the last 
dividend paid prior to the Initial Date of Deposit, dividends on the Stocks 
are expected to be sufficient to pay the entire amount of estimated expenses 
of the Trust. To the extent that dividends paid with respect to the Stocks 
and income received on the Treasury Obligations are not sufficient to meet 
the expenses of the Trust, the Trustee is authorized to sell Securities to 
meet the expenses of the Trust. Securities will be selected in the same 
manner as is set forth under "Redemption". 
    

RIGHTS OF UNITHOLDERS 

   Ownership of Units is evidenced by recordation on the books of the 
Trustee. In order to avoid additional operating costs and for investor 
convenience, certificates will not be issued unless a request, in writing 
with signature guaranteed by an eligible guarantor institution or in such 
other manner as may be acceptable to the Trustee, is delivered by the 
Unitholder to the Sponsor. Issued Certificates are transferable by 
presentation and surrender to the Trustee at its office in Boston, 
Massachusetts properly endorsed or accompanied by a written instrument or 
instruments of transfer. Uncertificated Units are transferable by 
presentation to the Trustee at its office in Boston of a written instrument 
of transfer. 

   Certificates may be issued in denominations of one Unit or any integral 
multiple thereof as deemed appropriate by the Trustee. A Unitholder may be 
required to pay $2.00 per certificate reissued or transferred, and shall be 
required to pay any governmental charge that may be imposed in connection 
with each such transfer or interchange. For new certificates issued to 
replace destroyed, mutilated, stolen or lost certificates, the Unitholder 
must furnish indemnity satisfactory to the Trustee and must pay such expenses 
as the Trustee may incur. Mutilated certificates must be surrendered to the 
Trustee for replacement. 

DISTRIBUTIONS 

   The Trustee will distribute net dividends and interest, if any, from the 
Income Account on the quarterly Distribution Dates to Unitholders of record 
on the preceding Record Date. Distributions from the Capital Account will be 
made on annual Distribution Dates to Unitholders of record on the preceding 

                               23           
<PAGE>
Record Date. Distributions of less than $.05 per Unit need not be made from 
the Capital Account on any Distribution Date. See "Essential Information". 
Whenever required for regulatory or tax purposes, the Trustee will make 
special distributions of any dividends or capital on special Distribution 
Dates to Unitholders of record on special Record Dates declared by the 
Trustee. 

   If and to the extent that the Sponsor, on behalf of the Trust, receives a 
favorable response to a no-action letter request which it intends to submit 
to the Division of Investment Management of the Securities and Exchange 
Commission (the "SEC") with respect to reinvesting cash proceeds received by 
the Trust, the Trustee may reinvest such cash proceeds in additional 
Securities held in the Trust Fund at such time. Such reinvestment shall be 
made so that each deposit of additional Securities shall be made so as to 
match as closely as practicable the percentage relationships of shares of 
Stocks and such reinvestment shall be made in accordance with the parameters 
set forth in the no-action letter response. If the Sponsor and the Trustee 
determine that it shall be necessary to amend the Indenture to comply with 
the parameters set forth in the no-action letter response, such documents may 
be amended without the consent of Unitholders. There can be no assurance that 
the Sponsor will receive a favorable no-action letter response. 
   
   Unitholders may elect to have their Income Account distributions 
automatically reinvested into additional Units of the Trust at no sales 
charge. (See "Reinvestment Plan"). 
    

   Upon termination of the Trust, each Unitholder of record on such date will 
receive his pro rata  share of the amounts realized upon disposition of the 
Securities plus any other assets of the Trust, less expenses of the Trust. 
(See "Termination of the Trust".) 

REINVESTMENT PLAN 

   
   Income Account distributions on Units may be reinvested by participating 
in the Trust's Reinvestment Plan (the "Reinvestment Plan"). To participate in 
the Reinvestment Plan, a Unitholder must contact his broker, dealer or 
financial institution to determine whether he may participate in the 
Reinvestment Plan. Under the Reinvestment Plan, the Units acquired for 
current Unitholders will be either Units already held in inventory by the 
Sponsor or new Units created by the Sponsor's deposit of additional 
Securities, contracts to purchase additional Securities or cash (or a bank 
letter of credit in lieu of cash) with instructions to purchase additional 
Securities. Deposits or purchases of additional Securities will be made so as 
to maintain the percentage relationships of shares of Stocks, except as 
discussed under "The Trust". Purchases made pursuant to the Reinvestment Plan 
will be made without any sales charge at the net asset value for Units of the 
Trust. Under the Reinvestment Plan, the Trust will pay the distributions to 
the Trustee which in turn will purchase for those participating Unitholders 
whole Units of the Trust at the price determined as of the close of business 
on the Distribution Date and will add such Units to the Unitholder's account. 
The Unitholder's account statement will reflect the reinvestment. The Trustee 
will not issue fractional Units, thus any cash remaining after purchasing the 
maximum number of whole Units will be distributed to the Unitholder. 
Unitholders wishing to terminate their participation in the Reinvestment Plan 
must notify their broker, dealer or financial institution of such decision. 
The Sponsor reserves the right to amend, modify or terminate the Reinvestment 
Plan at any time without prior notice. 
    

ADMINISTRATION OF THE TRUST 

   Accounts. All dividends and interest received on Securities, proceeds from 
the sale of Securities or other moneys received by the Trustee on behalf of 
the Trust may be held in trust in non-interest bearing accounts until 
required to be disbursed. 

                               24           
<PAGE>
   The Trustee will credit on its books to an Income Account dividends, if 
any, and interest income, on Securities in the Trust. All other receipts 
(i.e., return of principal and gains) are credited on its books to a Capital 
Account. A record will be kept of qualifying dividends within the Income 
Account. The pro rata share of the Income Account and the pro rata share of 
the Capital Account represented by each Unit will be computed by the Trustee 
as set forth under "Valuation". 

   The Trustee will deduct from the Income Account and, to the extent funds 
are not sufficient therein, from the Capital Account, amounts necessary to 
pay expenses incurred by the Trust. (See "Expenses and Charges.") In 
addition, the Trustee may withdraw from the Income Account and the Capital 
Account such amounts as may be necessary to cover redemption of Units by the 
Trustee. (See "Redemption.") 

   The Trustee may establish reserves (the "Reserve Account") within the 
Trust for state and local taxes, if any, and any other governmental charges 
payable out of the Trust. 

   Reports and Records. With any distribution from the Trust, Unitholders 
will be furnished with a statement setting forth the amount being distributed 
from each account. 

   The Trustee keeps records and accounts of the Trust at its office in 
Boston, including records of the names and addresses of Unitholders, a 
current list of underlying Securities in the portfolio and a copy of the 
Indenture. Records pertaining to a Unitholder or to the Trust (but not to 
other Unitholders) are available to the Unitholder for inspection at 
reasonable times during business hours. 


   Within a reasonable period of time after the end of each calendar year, 
commencing with calendar year 1998, the Trustee will furnish each person who 
was a Unitholder at any time during the calendar year an annual report 
containing the following information, expressed in reasonable detail both as 
a dollar amount and as a dollar amount per Unit: (1) a summary of 
transactions for such year in the Income and Capital Accounts and any 
Reserves; (2) any Securities sold during the year and the Securities held at 
the end of such year; (3) the Trust Fund Evaluation per Unit, based upon a 
computation thereof on the 31st day of December of such year (or the last 
business day prior thereto); and (4) amounts distributed to Unitholders 
during such year. 

   Portfolio Supervision. The portfolio of the Trust is not "managed" by the 
Sponsor or the Trustee; their activities described herein are governed solely 
by the provisions of the Indenture. The Indenture provides that the Sponsor 
may (but need not) direct the Trustee to dispose of a Security under the 
following circumstances: 


     (1) upon the failure of the issuer to declare or pay anticipated 
    dividends or interest; 

     (2) upon the institution of a materially adverse action or proceeding at 
    law or in equity seeking to restrain or enjoin the declaration or payment 
    of dividends or interest on any such Securities or the existence of any 
    other materially adverse legal question or impediment affecting such 
    Securities or the declaration or payment of dividends or interest on the 
    same; 

     (3) upon the breach of covenant or warranty in any trust indenture or 
    other document relating to the issuer which might materially and adversely 
    affect either immediately or contingently the declaration or payment of 
    dividends on such Securities; 

     (4) upon the default in the payment of principal or par or stated value 
    of, premium, if any, or income on any other outstanding securities of the 
    issuer or the guarantor of such Securities which might materially and 
    adversely, either immediately or contingently, affect the declaration or 
    payment of dividends on the Securities; 

                               25           
<PAGE>

     (5) upon the decline in price or the occurrence of any materially adverse 
    credit factors, that in the opinion of the Sponsor, make the retention of 
    such Securities not in the best interest of the Unitholder; 

     (6) upon a decrease in the Sponsor's internal rating of the Security; 

     (7) if the sale of such Securities is desirable to maintain the 
    qualification of the Trust Fund as a "regulated investment company"; or 

     (8) upon the happening of events which, in the opinion of the Sponsor, 
    negatively affect the economic fundamentals of the issuer of the Security 
    or the industry of which it is a part. 

   Securities may also be tendered or sold in the event of a tender offer, 
merger or acquisition in the manner described under "The Trust." The Trustee 
may also dispose of Securities where necessary to pay Trust expenses or to 
satisfy redemption requests as directed by the Sponsor and in a manner 
necessary to maximize the objectives of the Trust, or if not so directed in 
its own discretion, and Stocks having the greatest appreciation shall be sold 
first. 


AMENDMENT OF THE INDENTURE 

   The Indenture may be amended by the Trustee and the Sponsor without the 
consent of any of the Unitholders to cure any ambiguity or to correct or 
supplement any provision thereof which may be defective or inconsistent or to 
make such other provisions as will not adversely affect the interest of the 
Unitholders. 

   The Indenture may also be amended by the Trustee and the Sponsor without 
the consent of any of the Unitholders to implement a program to reinvest cash 
proceeds received by the Trust in connection with corporate actions and in 
other situations, when and if the Sponsor receives a favorable response to 
the no-action letter request which it intends to submit to the Division of 
Investment Management at the SEC discussed above (see "Distributions"). There 
can be no assurance that a favorable no-action letter response will be 
received. 

   The Indenture may be amended in any respect by the Sponsor and the Trustee 
with the consent of the holders of 51% of the Units then outstanding; 
provided that no such amendment shall (1) reduce the interest in the Trust 
represented by a Unit or (2) reduce the percentage of Unitholders required to 
consent to any such amendment, without the consent of all Unitholders. 

   The Trustee will promptly notify Unitholders of the substance of any 
amendment affecting Unitholders' rights or their interest in the Trust. 

TERMINATION OF THE TRUST 

   The Indenture provides that the Trust will terminate on the Mandatory 
Termination Date. If the value of the Trust as shown by any evaluation is 
less than fifty per cent (50%) of the market value of the Stocks upon 
completion of the deposit of Stocks, the Trustee may in its discretion, and 
will when so directed by the Sponsor, terminate such Trust. The Trust may 
also be terminated at any time by the written consent of 51% of the 
Unitholders or by the Trustee upon the resignation or removal of the Sponsor 
if the Trustee determines termination to be in the best interest of the 
Unitholders. In no event will the Trust continue beyond the Mandatory 
Termination Date. 

   Unless advised to the contrary by the Sponsor, approximately 20 days prior 
to the termination of the Trust the Trustee will begin to sell the Securities 
held in the Trust and will then, after deduction of any 

                               26           
<PAGE>
fees and expenses of the Trust and payment into the Reserve Account of any 
amount required for taxes or other governmental charges that may be payable 
by the Trust, distribute to each Unitholder, after due notice of such 
termination, such Unitholder's pro rata share in the Income and Capital 
Accounts. Moneys held upon the sale of Securities may be held in non-interest 
bearing accounts created by the Indenture until distributed and will be of 
benefit to the Trustee. The sale of Securities in the Trust in the period 
prior to termination may result in a lower amount than might otherwise be 
realized if such sale were not required at such time due to impending or 
actual termination of the Trust. For this reason, among others, the amount 
realized by a Unitholder upon termination may be less than the amount paid by 
such Unitholder. 

SPONSOR 

   The Sponsor, PaineWebber Incorporated, is a corporation organized under 
the laws of the State of Delaware. The Sponsor is a member firm of the New 
York Stock Exchange, Inc. as well as other major securities and commodities 
exchanges and is a member of the National Association of Securities Dealers, 
Inc. The Sponsor is engaged in a security and commodity brokerage business as 
well as underwriting and distributing new issues. The Sponsor also acts as a 
dealer in unlisted securities and municipal bonds and in addition to 
participating as a member of various selling groups or as an agent of other 
investment companies, executes orders on behalf of investment companies for 
the purchase and sale of securities of such companies and sells securities to 
such companies in its capacity as a broker or dealer in securities. 

   The Indenture provides that the Sponsor will not be liable to the Trustee, 
the Trust or to the Unitholders for taking any action or for refraining from 
taking any action made in good faith or for errors in judgment, but will be 
liable only for its own willful misfeasance, bad faith, gross negligence or 
willful disregard of its duties. The Sponsor will not be liable or 
responsible in any way for depreciation or loss incurred by reason of the 
sale of any Securities in the Trust. 

   The Indenture is binding upon any successor to the business of the 
Sponsor. The Sponsor may transfer all or substantially all of its assets to a 
corporation or partnership which carries on the business of the Sponsor and 
duly assumes all the obligations of the Sponsor under the Indenture. In such 
event the Sponsor shall be relieved of all further liability under the 
Indenture. 

   If the Sponsor fails to undertake any of its duties under the Indenture, 
becomes incapable of acting, becomes bankrupt, or has its affairs taken over 
by public authorities, the Trustee may either appoint a successor Sponsor or 
Sponsors to serve at rates of compensation determined as provided in the 
Indenture or terminate the Indenture and liquidate the Trust. 

TRUSTEE 

   
   The Trustee is Investors Bank & Trust Company, a Massachusetts trust 
company with its principal office at Hancock Towers, 200 Clarendon Street, 
Boston, Massachusetts 02116, toll-free number 800-356-2754, which is subject 
to supervision by the Massachusetts Commissioner of Banks, the Federal 
Deposit Insurance Corporation and the Board of Governors of the Federal 
Reserve System. 
    

   The Indenture provides that the Trustee will not be liable for any action 
taken in good faith in reliance on properly executed documents or the 
disposition of moneys, Securities or Certificates or in respect of any 
valuation which it is required to make, except by reason of its own gross 
negligence, bad faith or willful misconduct, nor will the Trustee be liable 
or responsible in any way for depreciation or loss incurred by reason of the 
sale by the Trustee of any Securities in the Trust. In the event of the 
failure of the Sponsor to act, the Trustee may act and will not be liable for 
any such action taken by it in good faith. The Trustee will not be personally 
liable for any taxes or other governmental charges imposed upon or 

                               27           
<PAGE>
in respect of the Securities or upon the interest thereon or upon it as 
Trustee or upon or in respect of the Trust which the Trustee may be required 
to pay under any present or future law of the United States of America or of 
any other taxing authority having jurisdiction. In addition, the Indenture 
contains other customary provisions limiting the liability of the Trustee. 
The Trustee will be indemnified and held harmless against any loss or 
liability accruing to it without gross negligence, bad faith or willful 
misconduct on its part, arising out of or in connection with its acceptance 
or administration of the Trust, including the costs and expenses (including 
counsel fees) of defending itself against any claim of liability. 

INDEPENDENT AUDITORS 

   The Statement of Financial Condition and Schedule of Investments audited 
by Ernst & Young LLP, independent auditors, have been included in reliance on 
their report given on their authority as experts in accounting and auditing. 

LEGAL OPINIONS 

   The legality of the Units offered hereby has been passed upon by Carter, 
Ledyard & Milburn, 2 Wall Street, New York, New York, as counsel for the 
Sponsor. 

                               28           
<PAGE>
                        REPORT OF INDEPENDENT AUDITORS 
   

THE UNITHOLDERS, SPONSOR AND TRUSTEE 
THE PAINEWEBBER EQUITY TRUST, GROWTH STOCK SERIES 21 

   We have audited the accompanying Statement of Financial Condition of The 
PaineWebber Equity Trust, Growth Stock Series 21, including the Schedule of 
Investments, as of January 8, 1998. This financial statement is the 
responsibility of the Trustee. Our responsibility is to express an opinion on 
this financial statement based on our audit. 

   We conducted our audit in accordance with generally accepted auditing 
standards. Those standards require that we plan and perform the audit to 
obtain reasonable assurance about whether the financial statement is free of 
material misstatement. An audit includes examining, on a test basis, evidence 
supporting the amounts and disclosures in the financial statement. Our 
procedures included confirmation with Investors Bank & Trust Company, 
Trustee, of an irrevocable letter of credit deposited for the purchase of 
securities, as shown in the financial statement as of January 8, 1998. An 
audit also includes assessing the accounting principles used and significant 
estimates made by the Trustee, as well as evaluating the overall financial 
statement presentation. We believe that our audit provides a reasonable basis 
for our opinion. 
    
   In our opinion, the financial statement referred to above presents fairly, 
in all material respects, the financial position of The PaineWebber Equity 
Trust, Growth Stock Series 21 at January 8, 1998, in conformity with 
generally accepted accounting principles. 
                                                 ERNST & YOUNG LLP 
New York, New York 
January 8, 1998 


                               29           
<PAGE>

                        THE PAINEWEBBER EQUITY TRUST, 
                            GROWTH STOCK SERIES 21 
                       STATEMENT OF FINANCIAL CONDITION 
                AS OF INITIAL DATE OF DEPOSIT, JANUARY 8, 1998 


   
<TABLE>
<CAPTION>
<S>                                                             <C>
                               TRUST PROPERTY 

Sponsor's Contracts to Purchase underlying Securities backed 
 by irrevocable letter of credit (a)...........................  $  962,500 
Organizational Expenses (b)....................................     100,000 
                                                                ------------ 
    Total......................................................  $1,062,500 
                                                                ============ 
                           INTEREST OF UNITHOLDERS 

Accrued Liability (b)..........................................  $  100,000 
                                                                ------------ 
100,000 Units outstanding: 
 Cost to investors (c).........................................   1,000,000 
 Less: Gross underwriting commissions (d)......................     (37,500) 
                                                                ------------ 
    Total liabilities and net assets...........................  $1,062,500 
                                                                ============ 
</TABLE>

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


   (a) The aggregate cost to the Trust of the securities listed under 
"Schedule of Investments" is determined by the Trustee on the basis set forth 
above under "Public Offering of Units--Public Offering Price." See also the 
column headed Cost of Securities to Trust under "Schedule of Investments." 
Pursuant to contracts to purchase securities, an irrevocable letter of credit 
drawn on Kredietbank N.V., New York Branch in the amount of $1,500,000 has 
been deposited with the Trustee, Investors Bank & Trust Company for the 
purchase of $962,500 aggregate value of Securities in the initial deposit and 
for the purchase of Securities in subsequent deposits. 

   (b) Organizational Expenses incurred by the Trust have been deferred and 
will be amortized over the 5 year life of the Trust. Organizational Expenses 
have been estimated on projected total assets of $25 million. To the extent 
the Trust is larger or smaller, the estimate may vary. 
    

   (c) The aggregate public offering price is computed on the basis set forth 
under "Public Offering of Units--Public Offering Price." 

   (d) Sales charge of 3.75% of the Public Offering Price per Unit is 
computed on the basis set forth under "Public Offering of Units--Sales Charge 
and Volume Discount." 

                               30           
<PAGE>

                         THE PAINEWEBBER EQUITY TRUST 
                            GROWTH STOCK SERIES 21 
                           SCHEDULE OF INVESTMENTS 
                AS OF INITIAL DATE OF DEPOSIT, JANUARY 8, 1998 


COMMON STOCKS (1) 

   
<TABLE>
<CAPTION>
      PRIMARY INDUSTRY SOURCE AND       NUMBER OF   COST OF SECURITIES 
            NAME OF ISSUER                SHARES       TO TRUST(2) 
- -------------------------------------  ----------- ------------------ 
<S>                                    <C>         <C>
Appliances (1.42%) 
 Sunbeam Corporation..................      340         $13,685.00 
Applications Software (4.28%) 
 Clarify, Inc.*.......................    1,050          13,781.25 
 PeopleSoft, Inc.*....................      400          13,650.00 
 The Vantive Corporation*.............      490          13,781.25 
Auto/Truck Parts & Equipment (5.00%) 
 Arvin Industries, Inc................      420          13,728.75 
 Excel Industries, Inc................      750          13,781.25 
 The Standard Products Company .......      510          13,865.63 
 Walbro Corporation...................      490           6,737.50 
Cellular Communications (4.32%) 
 360 Communications Company*..........      740          14,013.75 
 Nextel Communications, Inc.*.........      540          13,736.25 
 PriCellular Corporation*.............    1,260          13,781.25 
Computers (5.70%) 
 Cabletron Systems, Inc.*.............      920          13,742.50 
 Data General Corporation*............      730          13,687.50 
 Digital Equipment Corporation* ......      350          13,628.13 
 Stratus Computer, Inc.*..............      360          13,837.50 
Containers (2.85%) 
 Bemis Company, Inc...................      320          13,700.00 
 Shorewood Packaging Corporation* ....      540          13,770.00 
Data Processing/Management (1.43%) 
 Baan Company, N.V.*..................      390          13,796.25 
Direct Marketing(1.42%) 
 Catalina Marketing Corporation* .....      310          13,659.38 
Drug Delivery Systems (1.43%) 
 Alkermes, Inc.*......................      650          13,731.25 
Electric (4.31%) 
 Idaho Power Company..................      380          13,798.75 
 New York State Electric & Gas Corp. .      410          13,837.50 
 NIPSCO Industries, Inc...............      280          13,860.00 
Electronics (4.98%) 
 Credence Systems Corporation* .......      520          13,650.00 
 Etec Systems, Inc. *.................      320          13,840.00 
 Genus, Inc.*.........................    1,750           6,671.88 
 LTX Corporation*.....................    2,820          13,747.50 

                               31           
<PAGE>
                         THE PAINEWEBBER EQUITY TRUST 
                            GROWTH STOCK SERIES 21 
                           SCHEDULE OF INVESTMENTS 
          AS OF INITIAL DATE OF DEPOSIT, JANUARY 8, 1998 (CONTINUED) 

COMMON STOCKS (1) 

      PRIMARY INDUSTRY SOURCE AND       NUMBER OF   COST OF SECURITIES 
            NAME OF ISSUER                SHARES       TO TRUST(2) 
- -------------------------------------  ----------- ------------------ 
Finance (12.92%) 
 Beneficial Corporation...............      170         $13,833.75 
 First Chicago NBD Corporation .......      180          14,152.50 
 Fleet Financial Group, Inc...........      190          13,858.13 
 H.F. Ahmanson & Company..............      240          13,845.00 
 Golden State Bancorp, Inc.*..........      400          13,600.00 
 Mellon Bank Corporation..............      230          13,800.00 
 The Money Store, Inc.................      710          13,756.25 
 Southtrust Corporation...............      230          13,785.60 
 State Street Corporation.............      250          13,718.75 
Food (2.85%) 
 Dominick's Supermarkets, Inc.* ......      400          13,850.00 
 Hannaford Brothers Company...........      320          13,620.00 
Gas Distribution(4.25%) 
 Consolidated Natural Gas Company ....      240          13,485.00 
 MCN Corporation......................      370          13,875.00 
 Sonat, Inc...........................      310          13,543.13 
Internet Software (1.31%) 
 America Online, Inc*.................      140          12,582.50 
Machinery (2.87%) 
 Harnischfeger Industries, Inc. ......      370          13,851.88 
 New Holland N.V......................      540          13,770.00 
Medical (11.49%) 
 CardioThoracic Systems, Inc.* .......    1,140           6,697.50 
 Eclipse Surgical Technologies, 
 Inc.*................................    1,040           6,695.00 
 Genzyme Transgenics Corporation* ....    1,310          13,755.00 
 Heartport, Inc.*.....................      580          13,775.00 
 Schering-Plough Corporation..........      220          14,025.00 
 Sofamor Danek Group, Inc.*...........      210          13,741.85 
 St. Jude Medical, Inc.*..............      440          13,915.00 
 Texas Biotechnology Corporation* ....    2,340          13,747.50 
 Warner-Lambert Company...............      110          14,231.25 
Manufacturing (1.43%) 
 Samsonite Corporation*...............      400          13,775.00 
Networking Products (5.71%) 
 Ascend Communications, Inc.*.........      500          13,781.25 
 Bay Networks, Inc.*..................      490          13,750.63 
 FORE Systems, Inc.*..................      810          13,770.00 
 Xylan Corporation*...................      830          13,695.00 

                               32           
<PAGE>
                         THE PAINEWEBBER EQUITY TRUST 
                            GROWTH STOCK SERIES 21 
                           SCHEDULE OF INVESTMENTS 
          AS OF INITIAL DATE OF DEPOSIT, JANUARY 8, 1998 (CONTINUED) 

COMMON STOCKS (1) 
      PRIMARY INDUSTRY SOURCE AND       NUMBER OF   COST OF SECURITIES 
            NAME OF ISSUER                SHARES       TO TRUST(2) 
- -------------------------------------  ----------- ------------------ 
Oil (5.72%) 
 Nuevo Energy Company*................      370        $ 13,666.88 
 Sante Fe Energy Resources, Inc.* ....    1,460          13,778.75 
 Unocal Corporation...................      370          13,782.50 
 Western Atlas, Inc.*.................      200          13,775.00 
Publishing (2.84%) 
 Knight-Ridder, Inc...................      250          13,562.50 
 The Reader's Digest Association, 
 Inc..................................      580          13,738.75 
Seismic Data Collection (1.41%) 
 Veritas DGC, Inc.*...................      410          13,606.88 
Soap & Cleaning Preparation (2.88%) 
 Church & Dwight Co., Inc.............      480          13,830.00 
 The Clorox Company...................      180          13,916.25 
Telecommunications (7.18%) 
 AirTouch Communications, Inc.* ......      330          13,695.00 
 Century Telephone Enterprises, Inc.        270          13,837.50 
 GTE Corporation......................      270          13,736.25 
 Teleport Communications Group, 
 Inc.*................................      240          13,860.00 
 U.S. West Communications Group ......      300          13,931.25 
                                                   ------------------ 
  TOTAL INVESTMENTS...................                 $962,500.00 
                                                   ================== 
</TABLE>
    

- ------------ 
(1)     All Securities are represented entirely by contracts to purchase 
        Securities. 
   
(2)     Valuation of the Securities by the Trustee was made as described in 
        "Valuation" as of the close of business on the business day prior to 
        the Initial Date of Deposit. 
(3)     The loss to the Sponsor on the date of deposit is $384. 
*       Non-income producing security. 
    
                               33           
<PAGE>
   
                           PAINEWEBBER EQUITY TRUST 
                            Growth Stock Series 21 


                               [POWERGRAB LOGO]


                                                                      TRUSTEE: 
                                                INVESTORS BANK & TRUST COMPANY 
                                                                Hancock Towers 
                                                          200 Clarendon Street 
                                                           Boston, Mass. 02116 
                                                                (800) 356-2754 
    

                                                                      SPONSOR: 
                                                      PAINEWEBBER INCORPORATED 
                                                        1200 Harbor Boulevard, 
                                                         Weehawken, N.J. 07087 
                                                                (201) 902-3000 
                              TABLE OF CONTENTS 



<TABLE>
<CAPTION>
    <S>                                          <C>
    Essential Information Regarding the 
     Trust ...................................    2 
     The Trust ...............................   11 
     Risk Factors and Special Considerations .   13 
     Federal Income Taxes ....................   14 
     Public Offering of Units ................   16 
       Public Offering Price .................   16 
       Sales Charge and Volume Discount ......   16 
       Employee Discount .....................   17 
       Exchange Option .......................   17 
       Conversion Option .....................   18 
       Distribution of Units .................   19 
       Secondary Market for Units ............   19 
       Sponsor's Profits .....................   19 
     Redemption ..............................   20 
     Valuation ...............................   21 
     Comparison of Public Offering Price and 
      Redemption Value .......................   22 
     Expenses of the Trust ...................   22 
     Rights of Unitholders ...................   23 
     Distributions ...........................   23 
     Reinvestment Plan .......................   24 
     Administration of the Trust .............   24 
       Accounts ..............................   24 
       Reports and Records ...................   25 
       Portfolio Supervision .................   25 
     Amendment of the Indenture ..............   26 
     Termination of the Trust ................   26 
     Sponsor .................................   27 
     Trustee .................................   27 
     Independent Auditors ....................   28 
     Legal Opinions ..........................   28 
     Report of Independent Auditors ..........   29 
     Statement of Financial Condition ........   30 
     Schedule of Investments .................   31 
</TABLE>


NO PERSON IS AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY REPRESENTATION 
NOT CONTAINED IN THIS PROSPECTUS; AND ANY INFORMATION OR REPRESENTATION NOT 
CONTAINED HEREIN MUST NOT BE RELIED ON AS HAVING BEEN AUTHORIZED BY THE 
TRUST, THE TRUSTEE OR THE SPONSOR. THIS PROSPECTUS DOES NOT CONSTITUTE AN 
OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY SECURITIES IN ANY STATE TO 
ANY PERSON TO WHOM IT IS NOT LAWFUL TO MAKE SUCH OFFER IN SUCH STATE. 

THIS PROSPECTUS CONTAINS INFORMATION CONCERNING THE TRUST AND THE SPONSOR, 
BUT DOES NOT CONTAIN ALL THE INFORMATION SET FORTH IN THE TRUST'S 
REGISTRATION STATEMENTS, AMENDMENTS AND EXHIBITS RELATING THERETO, WHICH HAVE 
BEEN FILED WITH THE SECURITIES AND EXCHANGE COMMISSION, WASHINGTON, D.C. 
UNDER THE SECURITIES ACT OF 1933 AND THE INVESTMENT COMPANY ACT OF 1940, AND 
TO WHICH REFERENCE IS HEREBY MADE. 



<PAGE>

                       CONTENTS OF REGISTRATION STATEMENT


                  This registration statement comprises the following
documents:

                           The facing sheet.
                           The Prospectus.
                           The Undertaking to file reports.
                           The signatures.
                           Written consents of the following persons:
                                    Ernst & Young LLP 
                                    (included in Exhibit 99.C2) 
                                    Carter, Ledyard & Milburn 
                                    (included in Exhibits 99.2 and 99.C1)

                  The following exhibits:

                           1.   Ex.-27 - Financial Data Schedule

                           2.   Ex.-99.A1 - Standard Terms and Conditions of
                                Trust dated as of July 10, 1990 between
                                PaineWebber Incorporated, Depositor and
                                Investors Bank & Trust Company, as Trustee
                                (incorporated by reference to Exhibit 2 in
                                File No. 33-30404).

                           3.   Ex.-99.A2 - Copy of Trust Indenture and
                                Agreement between PaineWebber Incorporated,
                                Depositor, and Investors Bank & Trust Company,
                                as Trustee, incorporating by reference Standard
                                Terms and Conditions of Trust dated
                                as of July 10, 1990.

                           4.   Ex.-99.A5 - Form of Certificate of Ownership
                                (included in Standard Terms and Conditions of
                                Trust).

                           5.   Ex.-99.A6 - Certificate of Incorporation of
                                PaineWebber Incorporated, as amended
                                (incorporated by reference to Exhibit 8 in
                                File No. 2-88344).

                           6.   Ex.-99.A6 - By-Laws of PaineWebber
                                Incorporated, as amended (incorporated by
                                reference to Exhibit A(6)(a) in File No.
                                811-3722).

                           7.   Ex.-99.2 - Opinion of Counsel as to legality
                                of securities being registered.







<PAGE>



                           8.   Ex.-99.C1 - Opinion of Counsel as to income
                                tax status of securities being registered.

                           9.   Ex.-99.C2 - Consent of Ernst & Young LLP,
                                Independent Auditors.







<PAGE>




                              FINANCIAL STATEMENTS

1. Statement of Condition of the Trust as shown in the current Prospectus for
this series.

2. Financial Statements of the Depositor.

PaineWebber Incorporated-Financial Statements incorporated by reference to Form
10-K and Form 10-Q(File No. 1-7367), respectively.







<PAGE>



SIGNATURE

   
                  Pursuant to the requirements of the Securities Act of 1933,
the registrant has duly caused this Amendment to the Registration Statement to
be signed on its behalf by the undersigned, thereunto duly authorized, in the
City of New York, and State of New York, on the 8th day of January, 1998*.
    

                                            THE PAINEWEBBER EQUITY TRUST,
                                              GROWTH STOCK SERIES 21
                                            (Registrant)
                                            By: PaineWebber Incorporated
                                            (Depositor)


                                            /s/ Robert E. Holley
                                            -------------------------------
                                            Robert E. Holley
                                            Senior Vice President

   
                  Pursuant to the requirements of the Securities Act of 1933,
this Amendment to the Registration Statement has been signed on behalf of
PaineWebber Incorporated the Depositor by the following persons who constitute
a majority of the Executive Committee of its Board of Directors in the
following capacities and in the City of New York, and State of New York, on
this 8th of January, 1998*.

PAINEWEBBER INCORPORATED

        Name
                                          Office
Donald B. Marron                 Chairman, Chief Executive
                                 Officer, Director & Member of
                                 the Executive Committee*
Regina A. Dolan                  Executive Vice President, Chief
                                 Financial Officer & Director of PaineWebber
                                 Incorporated*
Joseph J. Grano, Jr.             President, Retail Sales & Marketing,
                                 Director & Member of the Executive
                                 Committee*
Steve P. Baum                    Executive Vice President, Director of
                                 PaineWebber Incorporated*
Robert H. Silver                 Executive Vice President Director of
                                 Paine Webber Incorporated*
Mark B. Sutton                   Executive Vice President, Director of
                                 PaineWebber Incorporated*
Margo N. Alexander               Executive Vice President, Director of
                                 PaineWebber Incorporated*
Terry L. Atkinson                Managing Director, Director of PaineWebber
                                 Incorporated*
Brian M. Barefoot                Executive Vice President, Director of
                                 PaineWebber Incorporated*
Michael Culp                     Managing Director, Director of PaineWebber
                                 Incorporated*
Edward M. Kerschner              Managing Director, Director of PaineWebber
                                 Incorporated*
James P. MacGilvray              Executive Vice President, Director of
                                 PaineWbber Incorporated*


                                 By

                                 /s/ Robert E. Holley
                                 --------------------------------
                                 Robert E. Holley
                                 Attorney-in-fact*

 *       Executed copies of the powers of attorney have been filed with the
         Securities and Exchange Commission in connection with Post Effective
         Amendment No.19 to the Registration Statement File No. 2-61279.
    

<PAGE>




                                 EXHIBIT INDEX


1.       Ex.-27 - Financial Data Schedule

2.       Ex.-99.A1 - Standard Terms and Conditions of Trust dated as of July
         10, 1990 between PaineWebber Incorporated, Depositor and Investors
         Bank & Trust Company, as Trustee (incorporated by reference to Exhibit
         2 in File No.
         33-30404).

3.       Ex.-99.A2 - Copy of Trust Indenture and Agreement between PaineWebber
         Incorporated, Depositor, and Investors Bank & Trust Company, as
         Trustee, incorporating by reference Standard Terms and Conditions of
         Trust dated as of July 10, 1990.

4.       Ex.-99.A5 - Form of Certificate of Ownership (included in
         Standard Terms and Conditions of Trust).

5.       Ex.-99.A6 - Certificate of Incorporation of PaineWebber
         Incorporated, as amended (incorporated by reference to
         Exhibit 8 in File No. 2-88344).

6.       Ex.-99.A6 - By-Laws of PaineWebber Incorporated, as
         amended (incorporated by reference to Exhibit A(6)(a) in
         File No. 811-3722).

7.       Ex.-99.2 - Opinion of Counsel as to legality of
         securities being registered.

8.       Ex.-99.C1 - Opinion of Counsel as to income tax status of
         securities being registered.

9.       Ex.-99.C2 - Consent of Ernst & Young LLP, Independent
         Auditors.



<TABLE> <S> <C>

<PAGE>

<ARTICLE>                     5
       
<S>                             <C>
<PERIOD-TYPE>                   OTHER
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                               0
<SECURITIES>                                   962,500
<RECEIVABLES>                                        0
<ALLOWANCES>                                   100,000
<INVENTORY>                                          0
<CURRENT-ASSETS>                               962,500
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                               1,062,500
<CURRENT-LIABILITIES>                          100,000
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                 1,062,500
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0
        


</TABLE>


<PAGE>




                                                                      Exhibit 1








                         THE PAINEWEBBER EQUITY TRUST,
                             GROWTH STOCK SERIES 21


                         TRUST INDENTURE AND AGREEMENT


                          Dated as of January 8, 1998


                                 Incorporating


                     Standard Terms and Conditions of Trust
                           Dated as of July 10, 1990,


                                    Between

                           PAINEWEBBER INCORPORATED,
                                  as Depositor


                                      and


                         INVESTORS BANK & TRUST COMPANY
                                   as Trustee







<PAGE>





                  THIS TRUST INDENTURE AND AGREEMENT dated as of January 8,
1998 between PaineWebber Incorporated, as Depositor and Investors Bank & Trust
Company, as Trustee, which sets forth certain of its provisions in full and
incorporates other of its provisions by reference to a document entitled
"Standard Terms and Conditions of Trust" dated as of July 10, 1990, among the
parties hereto (hereinafter called the "Standard Terms"), such provisions as
are set forth in full and such provisions as are incorporated by reference
constituting a single instrument.

                         W I T N E S S E T H T H A T :

                  WHEREAS, the parties hereto have heretofore or concurrently
herewith entered into the Standard Terms in order to facilitate creation of a
series of securities issued under a unit investment trust pursuant to the
provisions of the Investment Company Act of 1940 and the laws of the State of
New York, each of which series will be composed of redeemable securities
representing undivided interests in a trust fund composed of publicly traded
common or preferred stocks issued by domestic companies, and, in certain cases,
interest-bearing United States Treasury Obligations ("Treasury Obligations");
and

                  WHEREAS, the parties now desire to create the Twenty-first
Growth Stock trust of the aforesaid series;

                  NOW THEREFORE, in consideration of the premises and of the
mutual agreements herein contained, the Depositor and the Trustee agrees as
follows:

                  Section 1. Incorporation of Standard Terms and Conditions of
Trust. Subject to the provisions of Sections 2, 3 and 4 of this Trust Indenture
and Agreement set forth below, all of the provisions of the Standard Terms
incorporated by reference in their entirety and shall be deemed to be a part of
this instrument as fully to all intents and purposes as though said provisions
had been set forth in full in this instrument. Unless otherwise stated, section
references shall refer to sections in the Standard Terms.

                  Section 2. Specific Terms of this Series. The following terms
are hereby agreed to for this series of The PaineWebber Equity Trust, which
series shall be known and designated as "The PaineWebber Equity Trust, Growth
Stock Series 21".

                  A. (1) The aggregate number of Units outstanding on the date
hereof for this Series is 100,000.

                     (2) The initial fractional undivided interest represented
by each Unit of this series shall be 1/100,000th of the Trust Fund. A receipt
evidencing the ownership of this total number of Units outstanding on the date
hereof is being delivered by the Trustee to the Depositor.







<PAGE>



                  B. The term "Record Date" shall mean March 31, 1998 and
quarterly thereafter; provided, however, that with respect to a distribution
required by Section 2.02(b), the Record Date shall be the last business day of
the month during which the contract to purchase the Security fails.

                  Record Date shall also include such date or dates determined
by the Sponsor and the Trustee as necessary or desirable and in the best
interest of the Unitholders for federal or state tax purposes, or for other
purposes (hereinafter a "Special Record Date") which date may replace a
regularly scheduled Record Date if such regularly scheduled Record Date is
within 30 days of a Special Record Date.

                  C. The term "Distribution Date" shall mean the 20th day
following each Record Date, commencing April 20, 1998, and quarterly
thereafter with respect to Income Account Distributions and shall mean
January 20, 1999 and annually thereafter with respect to Capital Account
Distributions, except that the Trustee may declare a Record Date of December
31 in any year for a Distribution Date of January 20 of the following year, if
required for compliance with the rules and regulations governing regulated
investment companies. With respect to a distribution required by Section
2.02(b), the Distribution Date shall be twenty days after the Record Date with
respect thereto.

                  In the event a Special Record Date is declared, Distribution
Date shall also include such Date as is determined by the Sponsor and the
Trustee to be the Distribution Date in respect of such Special Record Date.

                  D. The Discretionary Liquidation Amount shall be fifty per
centrum (50%) of the aggregate value of the Securities originally deposited on
the date hereof and subsequently deposited pursuant to any Supplemental
Indenture pursuant to Section 2.02.

                  E. The Mandatory Termination Date shall be January 30, 2003.
Unless advised to the contrary by the Sponsor, the date on which the Trustee
shall begin to sell equity Securities in accordance with Section 9.01 shall be
January 10, 2003.

                  F. The Trustee's annual compensation as referred to in
Section 8.05 shall be $.0170 per Unit computed monthly based on the largest
number of Units outstanding during the preceding month.

                  G. The Sponsor's annual compensation pursuant to Section 7.02
shall be computed as $.0035 per Unit, based on the largest number of Units
outstanding in a calendar year.

                  H. The balance in the Capital Account below which no
distribution need be made, as referred to in Section 3.04, is $.05 per Unit
Outstanding.

                  I. Article I shall be amended as follows:







<PAGE>



                  1. The definition of "Securities" shall be deleted in its
entirety and the following text shall be inserted in replacement thereof:

                  "Shall mean the Securities, including Contract Securities,
                  (a) which are listed or referred to as Securities in Schedule
                  A to the Trust Indenture or any Supplemental Indenture, (b)
                  which have been received by the Trust in exchange or
                  substitution pursuant to Section 3.07 hereof as may from time
                  to time continue to be held as part of a Trust and (c) which
                  are additional deposits of Securities made pursuant to
                  Section 2.02, 3.02 and 3.15."

                  2. The definition of "Supplemental Indenture" shall be
deleted in its entirety and the following text shall be inserted in replacement
thereof:

                  "Shall mean a written direction from the Sponsor to the
                  Trustee instructing the Trustee to create additional Units
                  pursuant to and in accordance with 2.02(c) hereof."

                  3. The definition of "Percentage Ratios" shall be deleted in
its entirety and the following text shall be inserted in replacement thereof:

                  "Shall have the meaning assigned to it in Section 2.02."


                  J. Section 2.02 shall be deleted in its entirety and the
following text shall be inserted in its place:

                  "Section 2.02. Deposit of Securities. (a) The Sponsor
                  concurrently with the execution and delivery hereof, hereby
                  grants and conveys all of its right, title and interest in
                  and to and hereby conveys to and deposits with the Trustee in
                  an irrevocable Trust, the Securities (together with accrued
                  and unpaid income thereon) and Contract Securities, listed in
                  Schedule A to the Indenture, duly endorsed in blank or
                  accompanied by all necessary instruments of assignment and
                  transfer in proper form, to be held, managed and applied by
                  the Trustee as herein provided for the benefit of each
                  Unitholder to the extent of such Unitholder's interest in the
                  Trust Fund. The Sponsor hereby also delivers to the Trustee a
                  certified check or checks, cash or cash equivalents or an
                  irrevocable letter or letters of credit issued by a
                  commercial bank or banks in an amount necessary to consummate
                  the purchase of any Contract Securities. The Percentage
                  Ratios for the Trust Fund shall be the percentage ratios
                  between the number of shares of each issue of stock in such
                  Trust deposited in such Trust Fund on






<PAGE>



                  the initial date of deposit thereof (the "Initial Date of
                  Deposit") and determined by reference to Schedule A to the
                  Indenture for such Trust Fund. Such Percentage Ratios are
                  subject to adjustment to reflect the occurrence of (i) a
                  stock split or a similar event which affects the capital
                  structure of the issuer of a stock but which does not affect
                  the Trust's percentage ownership of the common stock equity
                  of such issuer at the time of such event, (ii) a merger or
                  reorganization, (iii) a sale of any Securities from the Trust
                  portfolio, or (iv) Securities deposited pursuant to Section
                  2.02(b). Stock dividends received by the Trust, if any,
                  pursuant to Section 3.07(d) will be sold by the Trustee and
                  the proceeds therefrom shall be treated as income to the
                  Trust.

                  (b) In the event that the purchase of Contract Securities
                  pursuant to any contract shall not be consummated in
                  accordance with said contracts, moneys held for the purchase
                  of such Contract Securities shall be credited to the Capital
                  Account and the Trustee, as directed by the Sponsor, shall
                  either (1) use the cash held or available under a letter or
                  letters of credit to purchase other stock or stocks having
                  characteristics sufficiently similar to the stocks originally
                  deposited or (2) distribute such moneys pursuant to Section
                  3.04 to Unitholders of record as of the Record Date next
                  following the failure of consummation of such purchase. The
                  Sponsor shall cause to be refunded to each Unitholder his pro
                  rata portion of the sales charge levied on the sale of Units
                  to such Unitholder attributable to such Contract Security.

                  (c) From time to time, following the Initial Date of Deposit,
                  the Sponsor is hereby authorized, in its discretion to cause
                  the Trustee to issue additional Units pursuant to a
                  Supplemental Indenture directing such additional Units to be
                  created based upon the following:

                  (1)      the deposit of additional Securities in respect of
                           such additional Units and/or contracts for the
                           purchase of such additional Securities; and/or

                  (2)      the deposit of cash in an amount to purchase such
                           additional Securities based upon the price of such
                           additional Securities at the Valuation Time on such
                           date of deposit.

                  To accomplish the issuance of additional Units by means of a
                  deposit of additional Securities, the Sponsor is authorized
                  to assign, convey to and deposit with the Trustee (i)
                  additional Securities, duly endorsed in blank or accompanied
                  by all necessary instruments of assignment, and/or (ii)
                  contracts for the purchase of such additional Securities, and






<PAGE>



                  the Sponsor shall transfer and deliver such necessary
                  instruments of assignment and/or contracts for the purchase
                  of such additional Securities to the Trustee along with a
                  certified check or checks, cash, cash equivalents or an
                  irrevocable letter or letters of credit issued by a
                  commercial bank in an amount necessary to consummate the
                  purchase of any such additional Securities represented by
                  contracts for the purchase of additional Securities.

                  To accomplish the issuance of additional Units by means of
                  depositing sufficient cash amounts with the Trustee to enable
                  the Trustee to purchase and deposit the additional
                  Securities, the Sponsor is hereby authorized to, and shall,
                  instruct the Trustee to create a specified number of
                  additional Units whereupon the Trustee shall purchase and
                  deposit the additional Securities in respect thereof.

   
                  Brokerage commissions with respect to the Trustee's purchase
                  of additional Securities, if any, shall be an expense borne
                  by the Trust. In all cases of creating additional Units, the
                  Sponsor shall also pay to the Trustee for deposit into the
                  Income Account an amount equal to the Cash Component per Unit
                  (as defined below), multiplied by the number of new Units
                  created in respect of the additional Securities deposited
                  into the Trust Fund pursuant to this Section 2.02(c). For
                  purposes of this paragraph, Cash Component means cash on hand
                  in the Trust Fund (excluding cash held for the purchase of
                  Contract Securities) and/or cash receivable by the Trust as
                  of the date of the deposit of additional Securities, reduced
                  by payables and accrued expenses and amounts allocated for
                  redemption of Units or for distribution to holders of record
                  as of a preceding Record Date. Such purchase and deposit of
                  additional Securities shall be made, in each case, pursuant 
                  to a Supplemental Indenture. Except as provided in Section 
                  3.07(d) the Sponsor, if depositing additional Securities with
                  the Trustee pursuant to this Section 2.02(c), and the Trustee,
                  if purchasing additional Securities with amounts provided to 
                  it by the Sponsor pursuant to this Section 2.02(c), in each 
                  case shall ensure that each deposit of additional Securities 
                  pursuant to this Section shall be made so as to maintain as 
                  closely as practicable the Percentage Ratios for such 
                  Securities determined by reference to Schedule A of the Trust
                  Indenture for each Trust Fund and subject to adjustment as 
                  provided herein.
    

                  The Securities deposited pursuant to this Section 2.02 are
                  comprised of (1) the Securities set forth in Schedule A of
                  the Trust Indenture, (2) any additional deposits of
                  Securities made in connection with the reinvestment of cash
                  proceeds in accordance with Section 3.02 and 




<PAGE>



                  pursuant to the provisions of Section 3.15, (3) any Treasury
                  Securities which may be deposited as temporary reinvestment
                  for sale proceeds pursuant to Section 3.02, and (4)
                  additional deposits of Securities pursuant to Section 2.02(b)
                  and this Section 2.02(c). Such additional Securities shall be
                  held, managed and applied by the Trustee as herein provided
                  and as provided in the applicable Trust Indenture.

                  (d) The Trustee is hereby irrevocably authorized to effect
                  registration or transfer of the Securities in fully
                  registered form to the name of the Trustee or to the name of
                  its nominee or the nominee of its agent."

                  K. Section 3.01 shall be deleted in its entirety and the
following text shall be inserted in its place:

                  "Section 3.01. Certain Moneys to Be Credited to Income
                  Account. The Trustee shall collect the Income on the
                  Securities as it becomes payable and credit all income to a
                  separate non-interest bearing account to be known as the
                  "Income Account", on the date on which the Trust Fund
                  receives such Income, or on the date it accrues with respect
                  to Securities issued at an original issue discount (including
                  all moneys realized by the Trustee from the sale of options,
                  warrants or other similar rights received in respect of the
                  Securities and including any stock dividends sold pursuant to
                  Section 3.07)."

                  L. The text of Section 3.02 shall be deleted and the
following text shall be inserted in its place:

                  "Section 3.02. Certain Moneys to Be Credited to Capital
                  Account. All moneys other than amounts credited to the Income
                  Account received by the Trustee in respect of the Securities
                  under this Indenture shall be credited to a separate
                  non-interest bearing account to be known as the "Capital
                  Account". If Securities in a Trust are to be sold pursuant to
                  Section 3.06 or 3.07, the proceeds of such sale, or moneys
                  received as a distribution of capital as the result of any
                  corporate or other business action of the issuer of a
                  Security in the Trust, may be reinvested, upon the
                  instruction of the Sponsor, (x) in additional Securities held
                  at such time in the Trust Fund on a pro rata basis in the
                  manner set forth in, and to the extent permitted by, Section
                  3.15 or (y) if not so permitted by Section 3.15, if (1) at
                  the time there is no legal or regulatory impediment and (2)
                  in the opinion of the Sponsor it is in the best interests of
                  the Unitholders to do so, in U.S. Treasury Obligations which
                  mature on or prior to the next scheduled Distribution Date
                  (the "Short-Term Treasury






<PAGE>



                  Obligations"). Any Short-Term Treasury Obligations purchased
                  pursuant to this Section 3.02 shall be deposited into the
                  applicable Trust and shall be subject to the terms of such
                  Trust Indenture and Agreement to the same extent as any
                  Security deposited into such Trust on the Initial Date of
                  Deposit and the terms "Trust Fund" and "Securities" shall
                  thereafter be defined as including such Short-Term Treasury
                  Obligations. Brokerage commissions with respect to the
                  purchase of such Securities or Short-Term Treasury
                  Obligations, if any, shall be an expense borne by the Trust.
                  Anything in this Section 3.02 to the contrary
                  notwithstanding, moneys which are required to cover the
                  purchase of Contract Securities shall be held specially by
                  the Trustee for such purchase and shall not be deemed to be
                  part of the Capital Account until the Sponsor shall have
                  notified the Trustee that such contracts have failed,
                  whereupon such moneys shall be credited to the Capital
                  Account and, unless reinvested pursuant to Section 2.02(b),
                  shall be held specially for distribution in the manner
                  provided in Section 2.02(b)."

                  M. The text of Section 3.04 shall be deleted and the
following text shall be inserted in its place:

                  "Section 3.04. Certain Deductions and Distributions. Each
                  month the Trustee shall satisfy itself as to the adequacy of
                  the Reserve Account, making any further credits thereto as
                  may appear appropriate in accordance with Section 3.03 and
                  shall then:

                  (a) deduct from the Income Account or, to the extent such
                  funds are not available in such Account, from the Capital
                  Account, or to the extent such funds are not available in
                  such Account, sell Securities in accordance with Section
                  5.02, and pay to itself individually the amounts that it is
                  at the time entitled to receive pursuant to Sections 8.01 and
                  8.05 on account of its services theretofore performed and
                  expenses, losses and liabilities theretofore incurred, if
                  any;

                  (b) deduct from the Income Account or, to the extent funds
                  are not available in such Account, from the Capital Account,
                  and pay to itself individually an amount equal to the portion
                  of the advance for Initial Costs specified in 10.02(b) for
                  which it is then entitled to reimbursement pursuant to such
                  section;

                  (c) deduct from the Income Account or, to the extent funds
                  are not available in such Account, from the Capital Account,
                  and pay to the Sponsor or successor Sponsor the amount that
                  it is entitled to receive pursuant to Sections 7.02 and
                  8.01(f); and





<PAGE>




                  (d) to the extent that the Trustee has been advised that
                  costs incurred in keeping the registration of Units and the
                  Trust on a current basis are permitted to be deducted at that
                  time by the Securities and Exchange Commission, deduct from
                  the Income Account, or to the extent funds are not available
                  in such Account, from the Capital Account, an amount equal to
                  the unpaid fees and expenses incurred in keeping the
                  registration statement current as provided in Section 10.03.

                  Any amounts that the Trustee has paid pursuant to (c) above
                  in excess of the amount to which the Sponsor is entitled
                  pursuant to Section 7.02, shall be returned to the Trust and
                  distributed on the next Distribution Date to Unitholders of
                  record on the preceding Record Date.

   
                  On each quarterly Distribution Date with respect to Income
                  Account Distributions ("Income Distributions"), and on each 
                  annual Distribution Date with respect to Capital Account 
                  Distributions ("Capital Distributions"), or within a 
                  reasonable period of time thereafter, the Trustee shall 
                  distribute by mail to each Unitholder of record at the close 
                  of business on the preceding Record Date at his address 
                  appearing on such Record Date on the registration books of 
                  the Trustee or by such other means as may be mutually agreed 
                  upon by the Trustee and the Unitholder, such Unitholder's 
                  pro rata share of the balance of the Income and/or Capital 
                  Accounts, as the case may be, computed as of such Record Date 
                  in the manner set forth below provided, however that the 
                  Trustee, if so directed with respect to such distributions 
                  from the Income Account only in a writing signed by the 
                  Sponsor on behalf of Unitholders electing the reinvestment 
                  plan offered in the Prospectus ("Reinvestment Plan") and 
                  received by the Trustee on or before the Record Date for the
                  first distribution to which such notice is to apply, use 
                  such distributions to purchase Units from the Sponsor, which 
                  may be Units held by the Sponsor or additional Units created 
                  pursuant to the provisions of Section 2.02, for the accounts 
                  of such Unitholders under the terms and conditions set forth 
                  in the Prospectus. Only whole Units shall be purchased 
                  pursuant to this Section.

                  The Trustee shall on or before each Distribution Date in 
                  respect of Income Distributions and/or Capital Distributions,
                  as the case may be, compute the amount of the distribution 
                  per Unit for such Distribution Date (i) by deducting, as 
                  applicable, from the cash on hand in the Capital and Income 
                  Accounts as of the Record Date immediately preceding such 
                  Distribution Date the total of (X) cash required for the 
                  redemption of unredeemed tendered Units and (Y) the sum of 
                  the amounts to be deducted from such Accounts on or before 
                  such Distribution Date pursuant to the foregoing provisions 
                  of this Section 3.04 and (ii) dividing the amount
    






<PAGE>



                  so obtained by the number of Units outstanding on the Record
                  Date immediately preceding such Distribution Date.

                  No distribution need be made from the Capital Account if the
                  balance therein is less than an amount set forth in the
                  Indenture.
   
                  The amount to be so distributed to each Unitholder shall be
                  that pro rata share of the cash balance of the Income or
                  Capital Accounts, as the case may be, computed as set forth 
                  herein, as shall be represented by the number of Units 
                  evidenced by the number of Units held of record by such 
                  Unitholder. In making the computation of such holder's pro 
                  rata share of the balance of the Income and Capital Accounts,
                  fractions of less than one cent shall be omitted.
    
                  In the event a Unitholder of a particular series of any Trust
                  fund is also a Unitholder of one or more other series of a
                  trust for which the Trustee is the trustee and for which the
                  Sponsor is the sole depositor, and such Unitholder has not
                  elected to participate in the Reinvestment Plan, then the
                  Trustee shall consolidate in one check the distribution
                  required to be made to a Unitholder hereunder with all other
                  distributions required to be made on such Distribution Date
                  to such Unitholder pursuant to the indenture governing such
                  other series; provided that an appropriate statement of
                  distribution be furnished therewith as required by the
                  applicable Trust Indenture."

                  N. The second paragraph of Section 3.05 shall be amended as
follows:

   
                           the phrase "Within a reasonable period of time after
                           the last day of each calendar year. . ." shall be
                           deleted and the following phrase shall be
                           substituted therefor: "Within 60 days following the
                           last day of each calendar year commencing with
                           calendar year 1998.
    


                  O. The text of Section 3.06 shall be deleted in its entirety
and the following text shall be inserted in its place:

   
                  "Section 3.06. Sale of Securities and of Certain Rights. The
                  Sponsor by written notice may direct the Trustee to sell
                  Securities at such price and time and in such manner as shall
                  be deemed appropriate by the Sponsor if the Sponsor shall 
                  have determined that any one or more of the following 
                  conditions exist:
    





<PAGE>


                  (a) that there has been a failure to declare or pay 
                  anticipated dividends or interest;

                  (b) that any materially adverse action or proceeding has been
                  instituted at law or in equity seeking to restrain or enjoin
                  the declaration or payment of dividends or interest on any
                  such Securities or that there exists any other materially
                  adverse legal question or impediment affecting such
                  Securities or the declaration or payment of dividends or
                  interest on the same;

                  (c) that there has occurred any breach of covenant or
                  warranty in any trust indenture or other document relating to
                  the issuer or obligor or guarantor which might materially and
                  adversely affect either immediately or contingently the
                  declaration or payment of dividends or interest on such
                  Securities;

                  (d) that there has been a default in the payment of the
                  principal or par or stated value of, premium, if any, or
                  income on any other outstanding securities of the issuer or
                  the guarantor of such securities which might materially and
                  adversely, either immediately or contingently, affect the
                  declaration or payment of dividends on the Securities;

                  (e) that a decline in price has occurred or such materially
                  adverse market or credit factors have occurred, that in the
                  opinion of the Sponsor the retention of such Securities would
                  not be in the best interest of the Unitholders;

                  (f) that the sale of such Securities is desirable in order to
                  maintain the qualification of the Trust Fund as a "Regulated
                  Investment Company" in the case of a trust which has elected
                  to qualify as such;

                  (g) that there has been a decrease in the Sponsor's internal
                  rating of the Security; or

                  (h) that there has been a happening of events which, in the
                  opinion of the Sponsor, negatively affects the economic
                  fundamentals of the issuer of the Security or the industry of
                  which it is a part.




<PAGE>





                  Upon receipt of such direction from the Sponsor with respect
                  to any Securities, or in the case of options, warrants or
                  other rights to purchase securities distributed to the Trust
                  in respect of Securities as soon as is practicable after
                  receipt of such options, warrants or other rights, the
                  Trustee shall proceed to sell the specified Securities or any
                  such rights. The Trustee shall not be liable or responsible
                  in any way for depreciation or loss incurred by reason of any
                  sale made pursuant to any such direction or by reason of the
                  failure of the Sponsor to give any such direction, and in the
                  absence of such direction the Trustee shall have no duty to
                  sell any Securities under this Section 3.06 except to the
                  extent otherwise required by Section 3.10. The Sponsor shall
                  not be liable for errors of judgment in directing or failing
                  to direct the Trustee pursuant to this Section 3.06. This
                  provision, however, shall not protect the Trustee or Sponsor
                  against any liability for which they would otherwise be
                  subject by reason of willful misfeasance, bad faith or gross
                  negligence in the performance of their obligations and duties
                  hereunder."

                  P. The text of Section 3.07 shall be deleted in its entirety
and the following text shall be inserted in its place:

                  "Section 3.07. Tender Offers, Reorganizations and Similar
                  Events, Stock Dividends.

                  The Sponsor irrevocably instructs the Trustee as follows:

                  (a) In the event of a tender offer for any Security (a
                  "Tender Stock") deposited in the Trust, by 1:00 p.m. three
                  Business days before the
<PAGE>



                  expiration of the best tender offer then in effect (that
                  being the tender offer of the highest value as determined by
                  the Sponsor and timely communicated to the Trustee) (the
                  "Best Offer") that (except as further provided in clause (d)
                  below) the Sponsor shall instruct the Trustee and the Trustee
                  shall tender the Tender Stock; provided however, the Trustee
                  shall place a limit order on such date, expiring at the close
                  of business on such date, for 90% of such Best Offer's value
                  as determined by the Sponsor; provided further, that in the
                  event the Best Offer is of an unconditional tender offer for
                  all outstanding Tender Stock and is not conditioned upon the
                  offeror's receipt of financing, such Tender Stock shall be
                  tendered and not sold. Any securities received pursuant to a
                  consummated tender offer shall be sold by the Trustee as soon
                  as practicable. Any Tender Stock which cannot be sold as set
                  forth above will be tendered;

                  (b) In the event Tender Stock has been tendered but a better
                  tender offer (that being a tender offer with a higher value
                  than a previous Best Offer, as determined by the Sponsor) (a
                  "Better Offer") is thereafter made prior to the expiration of
                  any withdrawal rights, the Sponsor shall timely notify the
                  Trustee and the Trustee shall use its best efforts to
                  exercise its withdrawal rights and apply the procedures set
                  forth in (a) above for the Better Offer;

                  (c) Upon the consummation of a tender offer, in the event any
                  Tender Stock is not accepted pursuant to the terms of a
                  tender offer, the Trustee shall sell the Tender Stock as soon
                  as practicable;
   
                  (d) Except as provided in subparagraph (2) below, 

                      (1) during the periods during which the Sponsor creates 
                      Additional Units for the Trust, the Trustee shall not 
                      tender or sell Tender Stock.

                      (2) On any Distribution Date relating to an Income
                      Distribution, if the Trustee creates Additional Units for
                      the Reinvestment Plan in accordance with Section 2.02,
                      and if the Trustee sells or tenders Tender Stock(s) in
                      accordance with subparagraphs (a), (b) or (c) on such
                      Distribution Date, then the Trustee shall not include
                      such Tender Stock(s) in the deposit of additional
                      Securities but instead shall adjust the Percentage Ratios
                      so that the Trust's percentage ownership of such Tender
                      Stock(s) shall be allocated on a pro rata basis to the 
                      remaining Securities held in the Trust Fund.
    

                  (e) In the event of a sale of substantially all of the assets
                  of an issuer of a Security or merger of an issuer of a
                  Security into another issuer, the Trustee shall sell the
                  affected Security pursuant to a limit order for 90% of the
                  value to be received by shareholders in such transaction (as
                  determined by the Sponsor), after the announcement of such
                  transaction. If after such acquisition or merger the Trustee
                  still holds Security upon such acquisition or merger or any
                  resulting securities are received in respect to Security the
                  Trustee shall sell them as soon as practicable.

                  (f) In the event the issuer of a Security announces that
                  another company or companies will be merged into it, the
                  Trustee shall retain such Security

<PAGE>

                  unless the Sponsor directs the Trustee to sell the Security
                  for one or more of the reasons set forth in Section 3.06.

                  (g) In the event of a corporate reorganization, the Trustee
                  shall sell securities received in respect of a Security as
                  soon as practicable.

                  (h) The Sponsor shall immediately advise the Trustee if it is
                  unable to determine (i) if an offer is a Best Offer or Better
                  Offer or (ii) the value of a tender offer, sale of
                  substantially all assets or merger. In such event, (a) in the
                  case of a tender offer, the Trustee shall sell the Tender
                  Stock as close to the opening of the stock exchanges as is
                  practicable on the last business day a tender offer is in
                  effect and (b) in the event of a sale of substantially all
                  assets or mergers, the Trustee shall continue to hold the
                  Security.

                  (i) In the event the Trustee is notified of any vote to be
                  taken or proposed to be taken by holders of the Securities
                  held by the Trust Fund in connection with any activity or
                  matter not otherwise covered by this Section 3.07, the
                  Trustee shall take such action with respect thereto as the
                  Sponsor shall direct.

                  (j) If, stock or securities are received by the Trustee, with
                  or without cash, as a result of any activity or matter not
                  otherwise covered by subsections (a) through (h) of this
                  Section 3.07 (including any stock or securities received
                  notwithstanding the Trustee's rejection of an offer or
                  received without an initial offer), the Trustee at the
                  direction of the Sponsor may retain or sell such stock or
                  securities in the Trust Fund. Any stock




<PAGE>

                  or securities so retained shall be subject to the terms and
                  conditions of the Indenture to the same extent as the
                  Securities originally deposited hereunder. The Trustee shall
                  give notice to the Unitholders of the retention of stock or
                  securities acquired in exchange for Securities within five
                  days after such acquisition.

                  (k) Additional shares of Securities received as a
                  distribution on Securities (other than shares received in a
                  non-taxable distribution which shall be retained by the Trust
                  Fund) shall be sold and the proceeds credited to the Income
                  Account."

                  Q. The first paragraph of Section 3.10 shall be amended by
deleting the first word of the paragraph, "In", and inserting the following
text in its place:

                  "Except as otherwise provided for in Section 3.07, in".

                  R. In the event that the Sponsor directs the Trustee to
distribute Securities in lieu of a cash redemption pursuant to Section 5.02 of
the Standard Terms, the Trustee shall so distribute the stocks and distribute
only stocks in a proportionate amount, rounding to avoid the delivery of
fractional shares and where such rounding is not possible by delivering stocks
and an amount equal to the difference between the Redemption Value and the
value of such stocks delivered (determined in accordance with Section 4.01 on
the date of tender).

                  S. The text of Section 3.13 shall be deleted and the
following text shall be inserted in its place:

                  "Section 3.13. Election to Qualify as Regulated Investment
                  Company; Diversification Tests. (a) The Trust intends to
                  elect to be treated and to qualify as a Regulated Investment
                  Company as defined in the Internal Revenue Code and the
                  Trustee is directed to make such elections, including any
                  appropriate election to be taxed as a corporation, as shall
                  be necessary to effect such qualification.

                  (b) The Trustee shall furnish to independent certified public
                  accountants designated by the Sponsor pursuant to Section
                  8.01(e) the value of the Securities in the Trust Fund as of
                  (1) the Friday (or the immediately preceding Business Day if
                  such Friday is not a Business Day) before the last Business
                  Day of the first quarter of the Trust Fund's first taxable
                  year (2) the last Business Day of the first quarter of the
                  Trust Fund's first taxable year, and (3) the last Business
                  Day of any subsequent quarter during which any Securities are
                  acquired by the Trust Fund. For purposes of this Section 3.13
                  each said day shall,




<PAGE>



                  except as the context may otherwise require, be hereinafter
                  referred to as the "Diversification Test Date".

                  On each Diversification Test Date upon written request from
                  the Trustee no later than five Business Days prior thereto,
                  which date shall be specified by the Trustee in such request,
                  such accountants shall send a written report, in form and
                  substance satisfactory to the Trustee and its counsel, to the
                  Trustee and to the Sponsor stating whether or not the
                  aggregate value of all Securities (other than U.S. Government
                  Securities) of each issuer, Securities issued by which are
                  valued at greater than 5% of the total assets of the Trust
                  Fund, exceeds 50% of the value of the total assets of the
                  Trust Fund on such Diversification Test Date. In making the
                  necessary computations, such accountants shall compute the
                  value of the Securities by taking the value of the Securities
                  in the Trust Fund, as so furnished by the Trustee, including
                  the amount of any accrued interest thereon, by treating as
                  Securities of the same issuer only those Securities whose
                  name so indicates; by treating contracts to purchase
                  Securities as if the Securities subject to such contracts had
                  been acquired by the Trust Fund; and by the settlement of
                  contracts to purchase Securities as the acquisition of
                  Securities on their respective settlement dates.

                  In the event the foregoing certification by such accountants
                  states that the aggregate value of Securities (other than
                  U.S. Government Securities) of each issuer, Securities issued
                  by which are valued at more than 5% of the total assets of
                  the Trust Fund, on the Friday (or the immediately prior
                  Business Day if such Friday is not a Business Day) before the
                  last Business Day in the first quarter of the first taxable
                  year of the Trust Fund exceeds 50% of the total assets of the
                  Trust Fund on such date, as provided in Section 3.06, the
                  Sponsor shall direct the Trustee to sell all or any portion
                  of the Securities whose value is greater than 5% of total
                  assets of the Trust Fund or take such other action as is
                  necessary so that the aggregate value of Securities (other
                  than U.S. Government Securities) of each issuer, Securities
                  issued by which have values greater than 5% of the total
                  assets of the Trust Fund, does not exceed 50% of the value of
                  the total assets of the Trust Fund on the last Business Day
                  of the first quarter of the first taxable year of the Trust
                  Fund. On the last day of the first quarter of the first
                  taxable year of the Trust Fund the Sponsor shall provide a
                  certificate satisfactory in form and substance to the Trustee
                  and its counsel to the effect that the aggregate value of all
                  Securities (other than U.S. Government Securities) of each
                  issuer, Securities issued by which are valued at greater than
                  5% of the total assets of the Trust




<PAGE>



                  Fund does not exceed 50% of the value of the Fund's total
                  assets on the last day of the quarter.

                  In order to ensure the continued qualification as a Regulated
                  Investment Company of a trust which has elected to so
                  qualify, the Trustee shall cause a review of the Trust to be
                  performed by such accountants prior to the end of the
                  calendar year. The purpose of such review shall be to
                  determine whether the Trust is deriving at least 90% of its
                  gross income from dividends, interest and gains from the sale
                  or other disposition of the Securities. The Trustee shall
                  submit the written results of such review to the Sponsor.

                  In the event that the foregoing audit states that less than
                  90% of the gross income of the Trust is derived from
                  dividends, interest and gains from the sale or other
                  disposition of the Securities, the Sponsor shall direct the
                  Trustee to sell certain of the Securities pursuant to Section
                  3.06 in an amount deemed necessary by the Sponsor to maintain
                  the status of the Trust as a Regulated Investment Company."

         In performing the duties set forth in this Section 3.13, the Trustee
may seek the advice of the independent certified public accountants designated
by the Sponsor pursuant to Section 8.01 hereof and may rely upon the advice of
such accountants."

                  S. The Trustee will calculate the Trust's value, as provided
in Section 5.01 on the dates set forth in said Section 5.01 and additionally
upon termination (or the last business day prior thereto).

                  T. The Standard Terms shall be amended to add new Section
3.15 as follows:

                  Section 3.15. Reinvestment of Cash Proceeds. If and to the
                  extent that the Sponsor, on behalf of the Trust, receives a
                  favorable response to its no-action letter request submitted
                  to the Securities and Exchange Commission with respect to
                  reinvesting cash proceeds received by the Trust, the Trustee
                  shall, upon receipt of instructions from the Sponsor,
                  reinvest such cash proceeds in additional Securities held in
                  the Trust Fund at such time. Such reinvestment shall be made
                  so that each deposit of additional Securities shall be made
                  so as to match as closely as practicable the Percentage
                  Ratios, and such reinvestment shall be made in accordance
                  with the parameters set forth in the no-action letter
                  response. If the Sponsor and the Trustee determine that it
                  shall be






<PAGE>



                  necessary to amend the Standard Terms and Agreement and/or
                  the Indenture to comply with the parameters set forth in the
                  no-action letter response, such documents may be so amended
                  without the consent of Unitholders.

                  U. In the event that any issuer of a Security in the Trust
issues a stock dividend in lieu of a cash dividend, such dividend shall be sold
by the Trustee, and the proceeds thereof shall be Income, as defined in the
Standard Terms, and shall be deposited into the Income Account and distributed
as of the next succeeding Income Account Distribution Date.

                  V. All Units will be held in book-entry form, except that
upon request a Unitholder may receive a certificate representing beneficial
ownership of its Units.

                  W. Section 10.02 of the Standard Terms shall hereby be
amended as follows:

                  1.       the text of Section 10.02 shall be deleted in its
                           entirety and;

                  2.       the following text set forth below shall be inserted
                           in replacement of such Section 10.02: "Section
                           10.02. Initial Costs (a) The Initial Costs incurred
                           by the Sponsor and the Trustee in connection with
                           the organization and establishment of the Trust (the
                           "Initial Costs") shall be paid by the Trust, or if
                           paid for by the Trustee initially, shall be
                           reimbursed by the Trust to the Trustee in accordance
                           with Sections 3.04(b) and 8.05.

                           (b)      Initial Costs to be charged to the Trust
                                    include, but are not limited to

                                    (1)      the costs of the initial
                                             preparation, typesetting and
                                             execution of the registration
                                             statement, prospectuses (including
                                             preliminary prospectuses), the
                                             trust indenture and other legal
                                             documents relating to the
                                             establishment of the Trust, and
                                             the costs of submitting such
                                             documents in electronic format to
                                             the SEC,

                                    (2)      SEC and state blue sky
                                             registration fees for the initial
                                             registration of Trust Units,

                                    (3)      the cost of the initial audit of
                                             the Trust,

                                    (4)      the legal costs incurred by the
                                             Sponsor and the Trustee related to
                                             any and all of the foregoing, and

                                    (5)      other out-of-pocket expenses
                                             related to any and all of the
                                             foregoing.
<PAGE>

                           (c)      Costs and expenses incurred in the
                                    marketing and selling of Trust Units, shall
                                    not be borne by the Trust but shall be paid
                                    for by the Sponsor. Such costs and expenses
                                    include but are not limited to (1) any
                                    expenses incurred in the printing of
                                    prospectuses (including preliminary
                                    prospectuses), (2) the preparation and
                                    printing of brochures and other advertising
                                    or marketing materials, including any legal
                                    costs incurred in the review thereof, and
                                    (3) any other selling or promotional costs
                                    or expenses.

                           (d)      Promptly after the Initial Date of Deposit,
                                    upon written certification to the Trustee,
                                    the Sponsor shall receive reimbursement for
                                    any of the Initial Costs set forth in
                                    subsection (b) above which are payable from
                                    the Trust but which were paid for by the
                                    Sponsor, without profit. The Trustee shall
                                    advance out of its own funds such
                                    reimbursement, provided, however that the
                                    Trustee shall be entitled to be reimbursed
                                    without interest out of the Trust Fund for
                                    any and all amounts advanced by it pursuant
                                    to this Section 10.02(d), in the manner set
                                    forth in Section 3.04(a). Such advances
                                    shall be considered a lien on the Trust
                                    Fund, and the Trustee shall have a priority
                                    over Unitholders on funds received in
                                    respect of the Securities in the Trust, as
                                    such funds are received.

                           (e)      The Trustee shall reimburse itself for the
                                    advances made pursuant to subsection (d)
                                    above in 60 months approximately equal
                                    installments over a five (5) year period
                                    unless (i) the Trust is sooner terminated,
                                    in which case all amounts still due and
                                    owing shall be payable to the Trustee from
                                    the assets of the Trust or (ii) by law or
                                    regulation the Trust is required to
                                    amortize costs set forth in subsection (b)
                                    over a period of time shorter than 60
                                    months, in which case the Trustee shall
                                    follow the requisite time period for such
                                    reimbursement.

                           (f)      The Sponsor shall bear the Initial Costs,
                                    if any, in excess of $100,000."

                  X. For the purpose of this Trust, Section 10.03(e) shall be
amended so that the text below shall be added to the paragraph following the
last sentence thereof:

                           "So long as the Sponsor is maintaining a secondary
                           market for Units, the Sponsor shall bear any audit
                           expense which exceeds $.0050 per Unit".

<PAGE>

                  Section 3. The Trust hereby elects to qualify as a Regulated
Investment Company under the Internal Revenue Code of 1986, as amended.


                  Section 4. All references in the Standard Terms to the First
National Bank of Chicago shall be deleted in their entirety, all references to
the term "Co-Trustees" shall be deleted and the term "Trustee" shall be
inserted in replacement thereof, the definition of "Trustee" in Article I shall
be amended to delete the reference to First National Bank of Chicago and all
terms relative to the Trustee shall be interpreted in the singular.





<PAGE>





                  IN WITNESS WHEREOF, PaineWebber Incorporated has caused this
Trust Indenture and Agreement to be executed by one of its Vice Presidents and
its corporate seal to be hereto affixed and attested by one of its Assistant
Secretaries, and Investors Bank & Trust Company has caused this Trust Indenture
to be executed by one of its Authorized Signatories and its corporate seals to
be hereto affixed and attested by one of its Authorized Signatories, all as of
the date first above written.

                                           PAINEWEBBER INCORPORATED
                                             as Depositor and Sponsor



SEAL                                       By
                                              -------------------------------
                                               Senior Vice President



Attest:


- --------------------------
         Secretary






<PAGE>



STATE OF NEW YORK                   )
                                    :ss.:
COUNTY OF NEW YORK                  )


                  On this 8th day of January, 1998 before me personally
appeared Robert E. Holley, to me known, who being by me duly sworn, said that
he is a Senior Vice President of PaineWebber Incorporated, one of the
corporations described in and which executed the foregoing instrument; that he
knows the seal of said corporation; that the seal affixed to said instrument is
such corporate seal; that it was so affixed by authority of the Board of
Directors of said corporation, and that he signed his name thereto by like
authority.





                                    -------------------------------
                                    Notary Public







<PAGE>



                         SCHEDULE A TO TRUST INDENTURE


                         THE PAINEWEBBER EQUITY TRUST 
                            GROWTH STOCK SERIES 21 
                           SCHEDULE OF INVESTMENTS 
                AS OF INITIAL DATE OF DEPOSIT, JANUARY 8, 1998 

COMMON STOCKS (1) 

<TABLE>
<CAPTION>
      PRIMARY INDUSTRY SOURCE AND        NUMBER OF   COST OF SECURITIES 
             NAME OF ISSUER                SHARES       TO TRUST(2) 
- --------------------------------------  ----------- ------------------ 
<S>                                     <C>         <C>
Appliances (1.42%) 
 Sunbeam Corporation...................      340         $13,685.00 
Applications Software (4.28%) 
 Clarify, Inc.*........................    1,050          13,781.25 
 PeopleSoft, Inc.*.....................      400          13,650.00 
 The Vantive Corporation*..............      490          13,781.25 
Auto/Truck Parts & Equipment (5.00%) 
 Arvin Industries, Inc.................      420          13,728.75 
 Excel Industries, Inc.................      750          13,781.25 
 The Standard Products Company.........      510          13,865.63 
 Walbro Corporation....................      490           6,737.50 
Cellular Communications (4.32%) 
 360 Communications Company*...........      740          14,013.75 
 Nextel Communications, Inc.*..........      540          13,736.25 
 PriCellular Corporation*..............    1,260          13,781.25 
Computers (5.70%) 
 Cabletron Systems, Inc.*..............      920          13,742.50 
 Data General Corporation*.............      730          13,687.50 
 Digital Equipment Corporation* .......      350          13,628.13 
 Stratus Computer, Inc.*...............      360          13,837.50 
Containers (2.85%) 
 Bemis Company, Inc....................      320          13,700.00 
 Shorewood Packaging Corporation* .....      540          13,770.00 
Data Processing/Management (1.43%) 
 Baan Company, N.V.*...................      390          13,796.25 
Direct Marketing(1.42%) 
 Catalina Marketing Corporation* ......      310          13,659.38 
Drug Delivery Systems (1.43%) 
 Alkermes, Inc.*.......................      650          13,731.25 
Electric (4.31%) 
 Idaho Power Company...................      380          13,798.75 
 New York State Electric & Gas Corp. ..      410          13,837.50 
 NIPSCO Industries, Inc................      280          13,860.00 
Electronics (4.98%) 
 Credence Systems Corporation*.........      520          13,650.00 
 Etec Systems, Inc. *..................      320          13,840.00 
 Genus, Inc.*..........................    1,750           6,671.88 
 LTX Corporation*......................    2,820          13,747.50 

                                       
<PAGE>
                         THE PAINEWEBBER EQUITY TRUST 
                            GROWTH STOCK SERIES 21 
                           SCHEDULE OF INVESTMENTS 
          AS OF INITIAL DATE OF DEPOSIT, JANUARY 8, 1998 (CONTINUED) 

COMMON STOCKS (1) 

      PRIMARY INDUSTRY SOURCE AND        NUMBER OF   COST OF SECURITIES 
             NAME OF ISSUER                SHARES       TO TRUST(2) 
- --------------------------------------  ----------- ------------------ 
Finance (12.92%) 
 Beneficial Corporation................      170         $13,833.75 
 First Chicago NBD Corporation.........      180          14,152.50 
 Fleet Financial Group, Inc............      190          13,858.13 
 H.F. Ahmanson & Company...............      240          13,845.00 
 Golden State Bancorp, Inc.*...........      400          13,600.00 
 Mellon Bank Corporation...............      230          13,800.00 
 The Money Store, Inc..................      710          13,756.25 
 Southtrust Corporation................      230          13,785.60 
 State Street Corporation..............      250          13,718.75 
Food (2.85%) 
 Dominick's Supermarkets, Inc.* .......      400          13,850.00 
 Hannaford Brothers Company............      320          13,620.00 
Gas Distribution(4.25%) 
 Consolidated Natural Gas Company .....      240          13,485.00 
 MCN Corporation.......................      370          13,875.00 
 Sonat, Inc............................      310          13,543.13 
Internet Software (1.31%) 
 America Online, Inc*..................      140          12,582.50 
Machinery (2.87%) 
 Harnischfeger Industries, Inc. .......      370          13,851.88 
 New Holland N.V.......................      540          13,770.00 
Medical (11.49%) 
 CardioThoracic Systems, Inc.*.........    1,140           6,697.50 
 Eclipse Surgical Technologies, Inc.* .    1,040           6,695.00 
 Genzyme Transgenics Corporation* .....    1,310          13,755.00 
 Heartport, Inc.*......................      580          13,775.00 
 Schering-Plough Corporation...........      220          14,025.00 
 Sofamor Danek Group, Inc.*............      210          13,741.85 
 St. Jude Medical, Inc.*...............      440          13,915.00 
 Texas Biotechnology Corporation* .....    2,340          13,747.50 
 Warner-Lambert Company................      110          14,231.25 
Manufacturing (1.43%) 
 Samsonite Corporation*................      400          13,775.00 
Networking Products (5.71%) 
 Ascend Communications, Inc.*..........      500          13,781.25 
 Bay Networks, Inc.*...................      490          13,750.63 
 FORE Systems, Inc.*...................      810          13,770.00 
 Xylan Corporation*....................      830          13,695.00 

                                    
<PAGE>
                         THE PAINEWEBBER EQUITY TRUST 
                            GROWTH STOCK SERIES 21 
                           SCHEDULE OF INVESTMENTS 
          AS OF INITIAL DATE OF DEPOSIT, JANUARY 8, 1998 (CONTINUED) 

COMMON STOCKS (1) 

      PRIMARY INDUSTRY SOURCE AND        NUMBER OF   COST OF SECURITIES 
             NAME OF ISSUER                SHARES       TO TRUST(2) 
- --------------------------------------  ----------- ------------------ 
Oil (5.72%) 
 Nuevo Energy Company*.................      370        $ 13,666.88 
 Sante Fe Energy Resources, Inc.* .....    1,460          13,778.75 
 Unocal Corporation....................      370          13,782.50 
 Western Atlas, Inc.*..................      200          13,775.00 
Publishing (2.84%) 
 Knight-Ridder, Inc....................      250          13,562.50 
 The Reader's Digest Association, 
 Inc...................................      580          13,738.75 
Seismic Data Collection (1.41%) 
 Veritas DGC, Inc.*....................      410          13,606.88 
Soap & Cleaning Preparation (2.88%) 
 Church & Dwight Co., Inc..............      480          13,830.00 
 The Clorox Company....................      180          13,916.25 
Telecommunications (7.18%) 
 AirTouch Communications, Inc.* .......      330          13,695.00 
 Century Telephone Enterprises, Inc.  .      270          13,837.50 
 GTE Corporation.......................      270          13,736.25 
 Teleport Communications Group, Inc.* .      240          13,860.00 
 U.S. West Communications Group .......      300          13,931.25 
                                                    ------------------ 
  TOTAL INVESTMENTS....................                 $962,500.00 
                                                    ================== 
</TABLE>

- ------------ 
(1)     All Securities are represented entirely by contracts to purchase 
        Securities. 
(2)     Valuation of the Securities by the Trustee was made as described in 
        "Valuation" as of the close of business on the business day prior to 
        the Initial Date of Deposit. 
(3)     The loss to the Sponsor on the date of deposit is $384. 
*       Non-income producing security. 

                                         



















<PAGE>





                                                                   Exhibit 99.2







PaineWebber Inc.
1200 Harbor Boulevard
Weehawken, New Jersey  07087                                    January 8, 1998


Investors Bank & Trust Company
Hancock Towers
200 Clarendon Street
Boston, Massachusetts  02116


                  Re:      PaineWebber Equity Trust,
                           Growth Stock Series 21

Ladies and Gentlemen:

                  We have served as counsel for PaineWebber Incorporated as
sponsor and depositor (the "Sponsor") of PaineWebber Equity Trust, Growth Stock
Series 21 (hereinafter referred to as the "Trust") in connection with the
issuance by the Trust of an initial 100,000 units of fractional undivided
interest in the Trust (hereinafter referred to as the "Units").

                  In this regard, we have examined executed originals or copies
of the following:

                           (a) The Restated Certificate of Incorporation, as
                  amended, and the By-Laws of the Sponsor, as amended,
                  certified by the Secretary of the Sponsor on the date hereof;






<PAGE>



                           (b) Resolutions of the Board of Directors of the
                  Sponsor adopted on December 3, 1971 relating to the Trust and
                  the sale of the Units, certified by the Secretary of the
                  Sponsor on the date hereof;

                           (c) Resolutions of the Executive Committee of the
                  Sponsor adopted on September 24, 1984, certified by the
                  Secretary of the Sponsor on the date hereof;

                           (d) Powers of Attorney as set forth in the
                  certificate of the Secretary of the Sponsor dated the date
                  hereof;

                           (e) The Registration Statement on Form S-6 (File No.
                  333-35615) filed with the Securities and Exchange Commission
                  (the "Commission") in accordance with the Securities Act of
                  1933, as amended, and the rules and regulations of the
                  Commission promulgated thereunder (collectively, the "1933
                  Act") and amendments thereto including Amendment No. 2
                  ("Amendment No. 2") proposed to be filed on January 8, 1998
                  (the "Registration Statement");

                           (f) The Notification of Registration of the Trust
                  filed with the Commission under the Investment Company Act of
                  1940, as amended (collectively, the "1940 Act") on Form N-8A,
                  as amended, (the "1940 Act Notification");

                           (g) The registration of the Trust filed with the
                  Commission under the 1940 Act on Form N-8B-2 (File No.
                  811-3722), as amended (the "1940 Act Registration);

                           (h) The prospectus included in Amendment No. 2 (the
                  "Prospectus");

                           (i) The Standard Terms and Conditions of the Trust
                  dated as of July 10, 1990, as amended, between the Sponsor
                  and Investors Bank & Trust Company, (the "Trustee") (the
                  "Standard Terms");

                           (j) The Trust Indenture dated as of January 8, 1998
                  between the Sponsor and the Trustee (the "Trust Indenture"
                  and, collectively with the Standard Terms, the "Indenture and
                  Agreement");

                           (k) The Closing Memorandum dated January 8, 1998,
                  between the Sponsor and the Trustee (the "Closing
                  Memorandum");

                           (l) Officers Certificates required by the Closing
                  Memorandum;

                           (m) The form of certificate of ownership for units
                  (the "Certificate") to be issued under the Indenture and
                  Agreement; and







<PAGE>



                           (n) Such other pertinent records and documents as we
                  have deemed necessary.

                  With your permission, in such examination, we have assumed
the following: (a) the authenticity of original documents and the genuineness
of all signatures; (b) the conformity to the originals of all documents
submitted to us as copies; (c) the truth, accuracy, and completeness of the
information, representations, and warranties contained in the records,
documents, instruments and certificates we have reviewed; (d) except as
specifically covered in the opinions set forth below, the due authorization,
execution, and delivery on behalf of the respective parties thereto of
documents referred to herein and the legal, valid, and binding effect thereof
on such parties; and (e) the absence of any evidence extrinsic to the
provisions of the written agreement(s) between the parties that the parties
intended a meaning contrary to that expressed by those provisions. However, we
have not examined the securities deposited pursuant to the Indenture and
Agreement (the "Securities") nor the contracts for the Securities.

                  We express no opinion as to matters of law in jurisdictions
other than the laws of the State of New York (except "Blue Sky" laws)and the
federal laws of the United States, except to the extent necessary to render the
opinion as to the Sponsor and the Indenture and Agreement in paragraphs (i) and
(iii) below with respect to Delaware law. As you know we are not licensed to
practice law in the State of Delaware, and our opinion in paragraph (i) and
(iii) as to Delaware law is based solely on review of the official statutes of
the State of Delaware.

                  Based upon such examination, and having regard for legal
considerations which we deem relevant, we are of the opinion that:

                  (i) The Sponsor is a corporation duly organized, validly
existing, and in good standing under the laws of the State of Delaware with
full corporate power to conduct its business as described in the Prospectus;

                  (ii) The Sponsor is duly qualified as a foreign corporation
and is in good standing as such within the State of New York;

                  (iii) The Indenture and Agreement has been duly authorized,
executed and delivered by the Sponsor and, assuming the due authorization,
execution and delivery by the Trustee, is a valid and binding agreement of the
Sponsor, enforceable against the Sponsor in accordance with its terms;

                  (iv) The Trust has been duly formed and is validly existing
as an investment trust under the laws of the State of New York and has been
duly registered under the Investment Company Act of 1940;

                  (v) The terms and provisions of the Units conform in all
material respects to the description thereof contained in the Prospectus;






<PAGE>



                  (vi) The consummation of the transactions contemplated under
the Indenture and Agreement and the fulfillment of the terms thereof will not
be in violation of the Sponsor's Restated Certificate of Incorporation, as
amended, or By-Laws, as amended and will not conflict with any applicable laws
or regulations applicable to the Sponsor in effect on the date hereof;

                  (vii) The Certificates to be issued by the Trust, when duly
executed by the Sponsor and the Trustee in accordance with the Indenture and
Agreement, upon delivery against payment therefor as described in the
Registration Statement and Prospectus will constitute fractional undivided
interests in the Trust enforceable against the Trust in accordance with their
terms, will be entitled to the benefits of the Indenture and Agreement and will
be fully paid and non-assessable; and

                  (viii) While the Registration Statement has not yet become
effective we have no reason to believe that such Registration Statement will
not become effective within 30 days after the date hereof.

                  In addition, we have participated in conferences with
representatives of the Sponsor, the Trustee, the Trust's accountants and others
concerning the Registration Statement and the Prospectus and have considered
the matters required to be stated therein and the statements contained therein,
although we have not independently verified the accuracy, completeness or
fairness of such statements. Based upon and subject to the foregoing, nothing
has come to our attention to cause us to believe that the Registration
Statement, as of the date hereof, contained an untrue statement of a material
fact or omitted to state a material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading, or that the Prospectus, as of the date
hereof, contained an untrue statement of a material fact or omitted to state a
material fact required to be stated therein or necessary in order to make the
statements therein, in light of the circumstances under which they were made,
not misleading (it being understood that we have not been requested to and do
not make any comment in this paragraph with respect to the financial
statements, schedules and other financial and statistical information contained
in the Registration Statement or the Prospectus).


                  Our opinion that any document is valid, binding, or
enforceable in accordance with its terms is qualified as to:

                  (a) limitations imposed by bankruptcy, insolvency,
reorganization, arrangement, fraudulent conveyance, moratorium, or other laws
relating to or affecting the enforcement of creditors' rights generally;

                  (b) rights to indemnification and contribution which may be
limited by applicable law or equitable principles; and







<PAGE>



                  (c) general principles of equity, regardless of whether such
enforceability is considered in a proceeding in equity or at law.

                  We hereby consent to the filing of this opinion as an exhibit
to the Registration Statement and to the use of our name wherever it appears in
the Registration Statement and the Prospectus.

                                               Very truly yours,



                                               CARTER, LEDYARD & MILBURN

KHM:def






<PAGE>


   
                                                                 Exhibit 99.C1
    


PaineWebber Incorporated                                        January 8, 1998
1200 Harbor Boulevard
Weehawken, New Jersey  07087


Investors Bank & Trust Company
Hancock Towers
200 Clarendon Street
Boston, Massachusetts  02116


Ladies & Gentlemen:

                  As counsel for PaineWebber Incorporated (the "Depositor"), we
have examined an executed copy of the Trust Indenture and Agreement dated as of
January 8, 1998 (the "Indenture") and Standard Terms and Conditions of Trust,
dated as of July 10, 1990 (the "Agreement"), both between the Depositor, and
Investors Bank & Trust Company, as Trustee. The Indenture established a trust
called The PaineWebber Equity Trust, Growth Stock Series 21 (the "Trust") into
which the Depositor deposited certain stocks, (the "Securities"), and moneys to
be held by the Trustee upon the terms and conditions set forth in the Indenture
and Agreement. Under the Indenture, units were issued representing fractional
undivided interests in the Trust (the "Units").

                  Based upon the foregoing and upon an examination of such
other documents and an investigation of such matters of law as we have deemed
necessary, we are of the opinion that, under existing statutes and decisions:








<PAGE>



                  1. The Trust intends to qualify for and elect tax treatment
as a regulated investment company under the Internal Revenue Code of 1986, as
amended (the "Code"). Assuming that such election is made and the Trust so
qualifies, the Trust would not be subject to federal income tax on such part of
its net income and capital gain, if any, as is timely distributed to
Unitholders.

                  2. The Trust will be subject to New York State and New York
City franchise and income tax. However, in any fiscal year in which the Trust
qualifies as a regulated investment company under Section 851 of the Code, and
in which the Trust distributes all of its net income and capital gains to
Unitholders, the sum of such New York State and New York City tax to which the
Trust will be subject will not exceed $2,055.00.

                  We hereby consent to the filing of this opinion as an exhibit
to the Registration Statement (File No. 333-35615) relating to the Units
referred to above and to the use of our name and to the reference to our firm
in said Registration Statement and in the related Prospectus.

                                                   Very truly yours,




                                                   CARTER, LEDYARD & MILBURN


KHM:def









<PAGE>





                                                                  Exhibit 99.C2


                        CONSENT OF INDEPENDENT AUDITORS


We consent to the use in this Amendment to the Registration Statement of our
report dated January 8, 1998 relating to the Statement of Financial Condition
of The PaineWebber Equity Trust, Growth Stock Series 21, including the Schedule
of Investments, included herein, and to the reference made to us under the
caption "Independent Auditors" in the Prospectus.




                                                   ERNST & YOUNG LLP


January 8, 1998
New York, New York




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