New York (CNN Business) The US-China trade war was the biggest driver for stocks this year. Before Washington and Beijing agreed a preliminary trade deal, investors got whiplash from headlines about the tense negotiations.

Anxiety about deteriorating trade relations also showed up in economic data this year, which led the Federal Reserve to cut interest rates three times this year to boost the economy.

All this left its mark on the stock market.

January 10: The best day of the year

S&P 500 SPX Dow INDU Stocks peaked early in 2019. The biggest rally happened on just the fourth trading day of the year, when thejumped 3.4%. Thealso recorded its biggest jump of the year that day, rallying nearly 750 points, or 3.3%.