Senior Loan & Income Portfolio of CEFs Series 25

Under normal circumstances, the Trust invests at least 80% of the value of its assets in common shares of closed-end investment companies (“Closed-End Funds”) that invest substantially all of their assets in senior loan funds and/or income funds. Guggenheim, through proprietary research, will strive to select Closed-End Funds featuring the potential for current income, diversification and overall liquidity.

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

The Sponsor has selected for the portfolio Closed-End Funds believed to have the best potential to achieve the Trust’s investment objective. The Closed-End Funds’ portfolios invest substantially all of their assets in senior loans and/or income-producing securities, including high-yield securities.

As of the Trust’s initial date of deposit (the “Inception Date”), 100% of the Trust’s portfolio is invested in securities of Closed-End Funds with portfolios that invest substantially all of their assets in senior loans and/or income-producing securities, including high-yield securities. See “Principal Risks” and “Investment Risks” for a description of the risks of investing in high-yield securities or “junk” securities.

When selecting Closed-End Funds for inclusion in this portfolio the Sponsor looks at numerous factors. These factors include, but are not limited to:

• Investment Objective. The Sponsor favors funds that have a clear investment objective in line with the Trust’s objective and, based upon a review of publicly available information, appear to be maintaining it.

• Premium/Discount. The Sponsor favors funds that are trading at a discount relative to their peers and relative to their long-term average.

• Consistent Dividend. The Sponsor favors funds that have a history of paying a consistent and competitive dividend.

• Performance. The Sponsor favors funds that have a history of strong relative performance (based on market price and net asset value) when compared to their peers and an applicable benchmark.

Investing in Senior Loans

Senior loans are made by banks, other financial institutions, and other investors (“Lenders”), to corporations, partnerships, limited liability companies and other entities (“Borrowers”) to finance leveraged buyouts, recapitalizations, mergers, acquisitions, stock repurchases, debt refinancings and, to a lesser extent, for general operating and other purposes. Senior loans generally are not subordinate to other significant claims on a Borrower’s assets. Senior loans held by Closed-End Funds may be in the form of various bonds and other income-producing securities, including high-yield securities. High-yield securities are securities rated below investment-grade by a nationally recognized statistical rating organization.

Senior loans are also generally rated below investment-grade by a nationally recognized statistical rating organization. Senior loans are generally negotiated between a Borrower and the Lenders represented by one or more Lenders acting as agent (“Agent”) of all the Lenders. The Agent is responsible for negotiating the loan agreement (“Loan Agreement”) that establishes the terms and conditions of the senior loan and the rights of the Borrower and the Lenders. The Agent is paid a fee by the Borrower for its services.

The majority of senior loans have either fixed or floating rates. The key difference between floating-rate and fixed-rate debt instruments is the manner in which the interest rate is set. In the case of fixed-rate loans, the rate of interest to be paid is fixed at the time of issuance. In the case of a floating-rate loan, current market interest rates dictate the rate of interest paid on the loan. Therefore, if interest rates go up, the interest payments on a floating-rate loan will be reset at a higher level (typically over a three to six month period). Conversely, if interest rates fall, the interest payments on a floating-rate loan will be reset at a lower level.

While senior loans can provide investors with high current income potential, the majority of senior loans are considered below investment-grade, and therefore retain a higher credit risk relative to lower yielding, investment-grade securities. The provision of price stability and preservation of capital is typical to senior loans as well; however, the senior loan market is still considered relatively illiquid.

For floating-rate senior loans, the interest rates are generally adjusted based on a base rate plus a premium or spread over the base rate. The base rate is usually:

• the London Inter-Bank Offered Rate (“LIBOR”);

• the prime rate offered by one or more major U.S. banks (the “Prime Rate”); or

• the certificate of deposit (“CD”) rate or other base lending rates used by commercial lenders.

LIBOR, as provided for in Loan Agreements, is usually an average of the interest rates quoted by several designated banks as the rates at which they pay interest to major depositors in the London interbank market on U.S. dollar-denominated deposits. The prime rate quoted by a major U.S. bank is generally the interest rate at which that bank is willing to lend U.S. dollars to its most creditworthy borrowers, although it may not be the bank’s lowest available rate. The CD rate, as provided for in loan agreements, usually is the average rate paid on large certificates of deposit traded in the secondary market.

Interest rates on senior loans may adjust daily, monthly, quarterly, semi-annually or annually. Senior loans are generally rated below investment-grade and may be unrated at the time of investment.

High-yield or “junk” securities are frequently issued by corporations in the growth stage of their development or by established companies who are highly leveraged or whose operations or industries are depressed. Securities that are rated below investment-grade by one national rating agency will be deemed to be below investment-grade for purposes of the Trust even if the security has received an investment-grade rating by a different national rating agency. Obligations rated below investment-grade should be considered speculative as these ratings indicate a quality of less than investment-grade. Because high-yield securities are generally perceived by investors to be riskier than higher rated securities, their prices tend to fluctuate more than higher rated securities and are affected by short-term credit developments to a greater degree.

See “Description of Ratings” in Part B of the prospectus for additional information regarding the ratings criteria.

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 includes Closed-End Funds. Closed-End Funds are actively managed investment companies that invest in various types of securities. Closed-End Funds issue common shares that are traded on a securities exchange. Closed-End Funds are subject to various risks, including management’s ability to meet the Closed-End Fund’s investment objective and to manage the Closed-End Fund’s portfolio during periods of market turmoil and as investors’ perceptions regarding Closed-End Funds or their underlying investments change. Closed-End Funds are not redeemable at the option of the shareholder and they may trade in the market at a discount to their net asset value. Closed-End Funds may also employ the use of leverage which increases risk and volatility. Instability in the auction rate preferred shares market may affect the volatility of Closed-End Funds that use such instruments to provide leverage.

• The Closed-End Funds are subject to annual fees and expenses, including a management fee. Unitholders of the Trust will bear these fees in addition to the fees and expenses of the Trust. See “Fees and Expenses” for additional information.

• Certain Closed-End Funds held by the Trust invest in senior loans. Borrowers under senior loans may default on their obligations to pay principal or interest when due. This non-payment would result in a reduction of income to the applicable Closed-End Fund, a reduction in the value of the senior loan experiencing non-payment and a decrease in the net asset value of the Closed-End Fund. Although senior loans in which the Closed-End Funds invest may be secured by specific collateral, there can be no assurance that liquidation of collateral would satisfy the borrower’s obligation in the event of nonpayment of scheduled principal or interest or that such collateral could be readily liquidated.

Senior loans in which the Closed-End Funds invest:

— generally are of below investment-grade credit or “junk” quality;

— may be unrated at the time of investment;

— may be floating-rate instruments in which the interest rate payable on the obligations fluctuates on a periodic basis based upon changes in the base lending rate;

— generally are not registered with the Securities and Exchange Commission (“SEC”) or any state securities commission; and

— generally are not listed on any securities exchange.

In addition, the amount of public information available on senior loans generally is less extensive than that available for other types of assets.

• The value of the fixed-income securities in the Closed-End Funds will generally fall if interest rates, in general, rise. Typically, fixed-income securities with longer periods before maturity are more sensitive to interest rate changes.

• A Closed-End Fund or an issuer of securities held by a Closed-End Fund may be unwilling or unable to make principal payments and/or to declare distributions in the future, may call a security before its stated maturity, or may reduce the level of distributions declared. This may result in a reduction in the value of your units.

• The financial condition of a Closed- End Fund or an issuer of securities held by a Closed-End Fund may worsen, resulting in a reduction in the value of your units. This may occur at any point in time, including during the primary offering period.

• Certain Closed-End Funds held by the Trust invest in securities that are rated below investment-grade and are considered to be “junk” securities. Below investment-grade obligations are considered to be speculative and are subject to greater market and credit risks, and accordingly, the risk of non-payment or default is higher than with investment-grade securities. In addition, such securities may be more sensitive to interest rate changes and more likely to receive early returns of principal.

• Certain Closed-End Funds held by the Trust may invest in securities that are rated as investment-grade by only one rating agency. As a result, such split-rated securities may have more speculative characteristics and are subject to a greater risk of default than securities rated as investment-grade by more than one rating agency.

• Certain Closed-End Funds held by the Trust may invest in foreign securities. Investment in foreign securities presents additional risk. Foreign risk is the risk that foreign securities will be more volatile than U.S. securities due to such factors as adverse economic, currency, political, social or regulatory developments in a country, including government seizure of assets, excessive taxation, limitations on the use or transfer of assets, the lack of liquidity or regulatory controls with respect to certain industries or differing legal and/or accounting standards.

• Certain Closed-End Funds held by the Trust may invest in securities issued by small-capitalization and mid-capitalization companies. These securities customarily involve more investment risk than securities of large-capitalization companies. Small-capitalization and mid-capitalization companies may have limited product lines, markets or financial resources and may be more vulnerable to adverse general market or economic developments.

• Economic conditions may lead to limited liquidity and greater volatility. The markets for fixed-income securities, such as those held by certain Closed-End Funds, may experience periods of illiquidity and volatility. General market uncertainty and consequent repricing risk have led to market imbalances of sellers and buyers, which in turn have resulted in significant valuation uncertainties in a variety of fixed-income securities. These conditions resulted, and in many cases continue to result in, greater volatility, less liquidity, widening credit spreads and a lack of price transparency, with many debt securities remaining illiquid and of uncertain value. These market conditions may make valuation of some of the securities held by a Closed-End Fund uncertain and/or result in sudden and significant valuation increases or declines in its holdings.

• 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.