<Li> In 1949, the third longest (eight - year) bull market begins . </Li> <Li> In 1954, the DJIA surpasses its 1929 peak in inflation - adjusted dollars . </Li> <Li> In 1956, the DJIA closes above 500 for the first time on March 12 . </Li> <Li> In 1957, after Poor's Publishing merged with the Standard Statistics Bureau, the Standard & Poors composite index grew to track 500 companies on the NYSE, becoming known as the S&P 500 . </Li>

When has the new york stock exchange closed