Santa Claus could be comin' to Wall Street. Tomorrow's session will mark the start of the so-called Santa Claus rally period. Popularized by the Stock Trader's Almanac, the final five trading days in a calendar year through the first two trading days have historically led to strong gains for the major indexes. "The Santa Claus Rally often grabs headlines because markets tend to deliver solid gains during this short window — or perhaps because it falls during a typically quiet news cycle,†writes Adam Turnqui ...