definiens: for any Trading Day means thevolume - weighted average of the per share selling prices on the Nasdaq NationalMarket, as reported by Nasdaq ( the ), of Buyer Common Stock for thatday, or, in case no such reported sale takes place on such day, the average ofthe reported closing bid and asked prices regular way on such day, in eithercase on the NASDAQ National Market or, if such stock is not listed or admittedto trading on the NASDAQ National Market, on the principal national securitiesexchange on which such stock is then listed or admitted to trading, or, if suchstock is not then listed or admitted to trading on any national securitiesexchange, the average of the closing bid and asked prices on such day in theover - the - counter market as furnished by any New York Stock Exchange member firmselected from time to time by the Buyer and reasonably acceptable to theStockholder Representative