December is historically one of the best months of the year for the SPDR S&P 500 ETF Trust. However, most of those historical gains have come in the second half of the month in a seasonal trade known as the Santa Claus Rally.
The official period of the Santa Claus Rally is the final five trading days of December and the first two trading days of January. This year, the Santa Claus Rally period begins on Thursday, Dec. 24.
