The traditional Santa Claus Rally period encompasses the final five trading days of 2025 (December 26, 29, 30, 31, and January 2) and represents one of the most closely watched seasonal patterns in market history. Since 1969, the S&P 500 ($SPX) (SPY) has averaged gains of 1.3% during this seven-day period, with positive returns occurring roughly 78% of the time. The phenomenon is attributed to various factors including year-end portfolio adjustments, tax-loss harvesting completion, pension fund rebalancing, ...