The Dow finished 2016 strong after enduring a tumultuous year, as markets struggled in the face of unpredictable global events like Brexit in Europe and the election of Donald Trump in the U.S. On Friday, the last trading day of the year, the Dow was set to close more than 4,300 points above its January 2016 low, good for a 14 percent gain. The S&P 500 also closed the year with a huge surge, with a 25 percent increase above its February 2016 low, and the Nasdaq closed the year on a 30 percent gain. The final week of the year is customarily quiet, with little to no trading; the markets will re-open Tuesday after the New Year's holiday.

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