Dow 10 Portfolio Series 16

The Trust consists of an equally dollar weighted portfolio of stocks of the 10 companies in the Dow Jones Industrial Average (“DJIA”) that have the highest dividend yields four business days prior to the initial date of deposit (the “Inception 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.

See “Investment Policies” in Part B of the prospectus for additional information.

The securities included in the Trust’s portfolio are the common stocks of the ten companies listed on the DJIA with the highest dividend yields four business days prior to the Inception 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 of business four business days prior to the Inception Date.

The “Dow Jones Industrial Average”, “DJIA” and “Dow 10” are service marks of Dow Jones Trademark Holdings, LLC (“Dow Jones”) and have been licensed for use for certain purposes by Guggenheim Funds Distributors, LLC. The portfolio is not sponsored, endorsed, sold or promoted by Dow Jones and Dow Jones makes no representation regarding the advisability of investing in such products.

INDEX DEFINITIONS: The S&P 500 Index is a capitalization- weighted index designed to measure the performance of the broad domestic economy through changes in the aggregate market value of 500 stocks representing all major industries. • The DJIA is a price-weighted index of 30 stocks compiled by Dow Jones & Company. Indexes are unmanaged and it is not possible to invest directly in an index.

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.

• Due to the current state of the economy, the value of the securities held by the Trust may be subject to steep declines or increased volatility due to changes in performance or perception of the issuers. Starting in December 2007, economic activity declined across all sectors of the economy, and many countries experienced increased unemployment. The economic crisis affected the global economy with European and Asian markets also suffering historic losses. In addition, Standard & Poor’s Rating Services lowered its long-term sovereign credit rating on the United States to “AA+” from “AAA.” Effects of the economic crisis can still be felt in many countries around the world and may have an impact on the securities held by the Trust.

• The Trust is concentrated in the information technology sector. As a result, the factors that impact the information technology sector will likely have a greater effect on this Trust than on a more broadly diversified Trust. Some of the risks associated with the information technology sector are listed below. The Trust is diversified across the information technology sector and includes stocks of companies from the following industries: communications equipment, computers and peripherals, electronic equipment and instruments, internet software and services, IT services, office electronics, semiconductors and semiconductor equipment and software. Adverse developments in the sector may affect the value of your investment. Companies involved in this sector must contend with rapid changes in technology, intense competition, government regulation and the rapid obsolescence of products and services. Furthermore, sector predictions may not materialize and the companies selected for the Trust may not represent the entire sector and may not participate in the overall sector growth.

• 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.