Is a "Santa Claus" Rally on the way? Since 1929, the S&P 500 has risen in 79% of Santa Claus Rally periods, with an average return of +1.6%. The Santa Claus Rally covers the last 5 trading days of December and the first 2 trading days of January. Similarly, since 1950, the S&P 500 has posted positive results in 79% of these periods, averaging +1.3%. Over the last 8 years, the index has declined during the Santa Claus window only once. All while the last 2 weeks of December have been the best weeks for stocks over the last 75 years. We may see the S&P 500 at 7,000 by year-end.