Wednesday’s rally appeared to be short-lived as markets went lower on Thursday with the Dow Jones Industrial Average dropping as much as 600 points on continuing trade war tensions between the U.S. and China.

Per a Reuters report, U.S. President Donald Trump is considering the possibility of executing an executive order to ban U.S. companies from using equipment built by Chinese firms Huawei and ZTE, which could squash the hopes of a trade deal between the two biggest economies. Earlier this month, President Trump and Chinese president Xi Jinping agreed to cease fire on their tariff-for-tariff battle.

Trump and Jinping met at the G-20 Summit in Buenos Aires, putting global markets on pause as the two economic superpowers met to hopefully ameliorate their trade differences. As part of the agreement, both nations agreed to withhold imposing further tariffs on each other for 90 days while they work out a firm, ironclad deal.

“Just when everyone had counted the market down, the market bounded back,” said John Carey, a portfolio manager at Amundi Pioneer.

Just when it appeared that the prospect of a Santa Claus was bleak, the markets were surprised by Wednesday’s run. In addition to the Dow’s 1,000-point surge, the S&P climbed almost 4 percent, while the Nasdaq Composite gained almost 300 points.

“I think it has to do with valuations, we got to a point where the market had sold off about 20 percent and price-to-earnings multiples had come down on the S&P from the low 20s to 15-16 times earnings and all of a sudden people looked around and thought stocks might be a good buy,” Carey said.

Historic Market Surge

On Wednesday, the Dow Jones Industrial Average rose almost 300 points, erased its gains within the same hour and proceeded to surge over 1,000 points, effectively logging its biggest single-day point gain ever. It was a welcome sign for equities investors who saw a Christmas Eve Dow drop of 653 points, while the S&P 500 entered bear market territory.

The markets were hoping that the Santa Claus rally or more specifically, the January Effect—investors dumping stocks in order to accumulate tax losses to offset capital gains—would make an appearance.

Ahead of Christmas, the prospect of a Santa Claus rally appeared bleak, but to investors, coming a day after Christmas is certainly a case of “better late than never.” However, according to history, this late rally towards the end of the year and possibly into early January is par for course.

“For the past five decades, the final week of the year and the first couple of trading sessions in January have registered more than 1 percent gains,” according to research by The Washington Post. “Markets generally languish for a couple of weeks after Thanksgiving as traders sell investments and losers in preparation for tax season. Toward the end of December, some stocks may be on sale, causing investors to scoop them up and push indexes higher.”

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