Closing Sales Price means, for any security as of any date, the last sales price of such security on the principal trading market where such security is listed or traded as reported by Bloomberg Financial Markets (or a comparable reporting service of national reputation selected by the Corporation if Bloomberg Financial Markets is not then reporting closing sales prices of such security) (collectively, “Bloomberg”), or if the foregoing does not apply, the last reported sales price of such security on a national exchange or in the over-the-counter market on the electronic bulletin board for such security as reported by Bloomberg, or, if no such price is reported for such security by Bloomberg, the average of the bid prices of all market makers for such security as reported in the “pink sheets” by the National Quotation Bureau, Inc., in each case for such date or, if such date was not a trading day for such security, on the next preceding date that was a trading day. If the Closing Sales Price cannot be calculated for such security on any of the foregoing bases, the Closing Sales Price of such security on such date shall be the fair market value as reasonably determined by an investment banking firm selected by the Corporation, with the costs of such appraisal to be borne by the Corporation.