(CNBC) Stocks could get a big boost in December, especially during the second half

Wall Street could get a big Santa Claus rally in December, especially in the second half of the month, history shows.

The Dow Jones industrial average, S&P 500, Nasdaq 100 and Russell 2000 all averaged returns of at least 1.8 percent in the final month of the year since 1987, according to CNBC analysis using Kensho.

The small-cap Russell 2000 has been the best-performing index in December, averaging a 2.87 percent gain and trading positive 86 percent of the time, the data show.

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