Dow 10 Portfolio Series 21

The Trust consists of an equally dollar weighted portfolio of stocks of companies in the Dow Jones Industrial Average (“DJIA”) that have the highest dividend yields seven business days prior to the initial date of deposit (the “Security Selection Date”) and hold them for approximately 15 months.

The Sponsor believes that dividends play an important part in total return and that stocks that have higher dividend yields may also be undervalued. The Sponsor also believes that blue chip stocks that are undervalued have the potential for higher total returns over time. As a result of this strategy, the Trust invests significantly in the consumer products sector, the energy sector, the health care sector and the industrials sector.

The securities included in the Trust’s portfolio are the common stocks of companies listed on the DJIA with the highest dividend yields as of the Security Selection Date. The dividend yields were calculated by annualizing the last quarterly or semi-annual ordinary dividend declared and dividing the result by the market value of the security as of the close on the Security Selection Date.

As with all investments, you may lose some or all of your investment in the Trust. No assurance can be given that the Trust’s investment objective will be achieved. The Trust also might not perform as well as you expect. This can happen for reasons such as these:

• Securities prices can be volatile. The value of your investment may fall over time. Market value fluctuates in response to various factors. These can include stock market movements, purchases or sales of securities by the Trust, government policies, litigation, and changes in interest rates, inflation, the financial condition of the securities’ issuer or even perceptions of the issuer. Units of the Trust are not deposits of any bank and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

• The Trust invests significantly in the consumer products sector. As a result, the factors that impact the consumer products sector will likely have a greater effect on this Trust than on a more broadly diversified Trust. General risks of companies in the consumer products sector include cyclicality of revenues and earnings, economic recession, currency fluctuations, changing consumer tastes, extensive competition, product liability litigation and increased government regulation. A weak economy and its effect on consumer spending would adversely affect companies in the consumer products sector.

• The Trust invests significantly in the energy sector. As a result, the factors that impact the energy sector will have a greater effect on this Trust than on a more broadly diversified Trust. Companies in the energy sector are subject to volatile fluctuations in price and supply of energy fuels, and can be impacted by international politics and conflicts, including the unrest in Iraq and hostilities in the Middle East, terrorist attacks, the success of exploration projects, reduced demand as a result of increases in energy efficiency and energy conservation, natural disasters, clean-up and litigation costs associated with environmental damage and extensive regulation.

• The Trust invests significantly in the health care sector. As a result, the factors that impact the health care sector will likely have a greater effect on this Trust than on a more broadly diversified Trust. General risks of companies in the health care sector include extensive competition, generic drug sales, the loss of patent protection, product liability litigation and increased government regulation.

• The Trust invests significantly in the industrials sector. As a result, the factors that impact the industrials sector will likely have a greater effect on this Trust than on a more broadly diversified Trust. Adverse developments in this sector may significantly affect the value of your units. Companies involved in the industrials sector must contend with the state of the economy, intense competitors, domestic and international politics, excess capacity and spending trends.

• Share prices or dividend rates on the securities in the Trust may decline during the life of the Trust. There is no guarantee that share prices of the securities in the Trust will not decline and that the issuers of the securities will declare dividends in the future and, if declared, whether they will remain at current levels or increase over time.

• Inflation may lead to a decrease in the value of assets or income from investments.

• The Sponsor does not actively manage the portfolio. The Trust will generally hold, and may, when creating additional units, continue to buy, the same securities even though a security’s outlook, market value or yield may have changed.

See “Investment Risks” in Part A of the prospectus and “Risk Factors” in Part B of the prospectus for additional information.