Here's how various stock indices performed during the Santa Claus Rally in the past 40 years:

- S&P 500: up 75% of the time, average gain +0.91%

- Dow: up 77.5% of the time, average gain +0.95%

- NASDAQ 100: up 62.5% of the time, average gain +1.62%

- NASDAQ Composite: up 72.5% of the time, average gain 1.61%

- Russell 2000: up 72.5% of the time, average gain 1.47%