Stock Market Today: Dow ends 420 points lower as traders take profits ahead of New Year's Eve
Every year, investors look forward to the “Santa Claus rally,” a period that encompasses the final five trading days of December and the first two trading days of the new year. Since 1950, the S&P 500 has gained, on average, 1.3% during this stretch, while finishing higher nearly 80% of the time, according to Dow Jones Market Data.