Fort Dearborn Income Securities, Inc. (NYSE:FDI) held a special meeting of shareholders on April 18, 2016 at which the shareholders approved the Fund's reorganization into the class P shares of a newly created open-end mutual fund, UBS Total Return Bond Fund (ticker symbol: UTBPX). The reorganization, approved at the Fund's special meeting of shareholders, is currently scheduled for Friday, May 20, subject to satisfaction of certain closing conditions, and will result in FDI shareholders becoming shareholders of UTBPX.

To facilitate the transition from a closed-end fund to an open-end fund, FDI will close its transfer books on Tuesday, May 17 and FDI shares will cease trading on the New York Stock Exchange. After that time, holders of FDI shares will not be able to sell their shares on the stock exchange and their investment will be temporarily illiquid. However, assuming the reorganization takes place on May 20, effective Monday, May 23, the first business day following the reorganization, UTBPX shareholders may redeem their shares at net asset value, subject to a temporary 2% redemption fee. The temporary redemption fee will remain in effect for 90 days following the date of the reorganization (or until August 22, 2016).

The new fund, UBS Total Return Bond Fund, invests at least 80% of its net assets in bonds and/or instruments that provide exposure to bond markets. The Fund's investments in bonds include a variety of fixed income securities, which may include, but are not limited to, securities of the US government, its agencies and government-sponsored enterprises, securities guaranteed by the US government, corporate debt securities of US and non-US issuers, including convertible securities, obligations of non-US governments or their subdivisions, agencies and government-sponsored enterprises, obligations of international agencies or supranational entities, mortgage-backed (including commercial and residential mortgage-backed securities) and asset-backed securities, and other securitized and structured securities.

The foregoing does not constitute an offering of any securities for sale. The combined prospectus/proxy statement relating to the reorganization contains important information about the reorganization and free copies may be obtained by calling the fund at 888-793 8637 or at the SEC's website www.sec.gov. A registration statement relating to the UBS Total Return Bond Fund has been filed with the Securities and Exchange Commission, but UBS Total Return Bond Fund has not yet commenced a continuous offering of its shares. Following the closing of the reorganization, UBS Total Return Bond Fund intends to commence a continuous offering of its shares. Other than in the reorganization, shares of UBS Total Return Bond Fund may not be sold nor may offers to purchase shares be accepted prior to that time.

After the reorganization, if your shares of FDI were represented by one or more share certificates, you must submit your certificates to BNY Mellon Investment Servicing (US) Inc., UBS Total Return Bond Fund's transfer agent, in order to make any transactions in your new UBS Total Return Bond Fund account. UBS Total Return Bond Fund will not issue share certificates in the reorganization. Instead, all shares of UBS Total Return Bond Fund, including UTBPX, will be held in book entry form either directly with the Fund's transfer agent or through a financial intermediary.

Investing in the Fund entails specific risks, such as interest rate, credit and US government securities risks as well as derivatives investment risk. Until the reorganization, further information regarding the Fund may be found at http://www.ubs.com/closedendfundsinfo.

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