File - In this Nov. 21, 1995 file photo, a New York Stock Exchange trader throws tickets into the air on the floor of the exchange as it closes, in New York. The Dow Jones industrial average closed in record territory over the milestone 5,000 mark for the first time  in  history. When it comes to Wall Street, big, round numbers make people take notice. Dow 13,000, reached earlier this week for a few brief minutes, was the latest example. Photo: AP