Trump’s low threshold for stock-market pain

President Trump’s protectionist trade policies are harming the US economy. But a powerful corrective – the stock market—will limit the damage. And Trump’s recent behavior reveals he can only bear modest market declines before he seeks a way to intervene and push stocks back up.

Investors have repeatedly registered instant disapproval when Trump has intensified his trade war, by selling stocks and pushing prices down. This gets Trump’s attention. He views the stock market as a grade on his presidency, claiming his policies are the reason stocks have risen since his election.

Yo-yoing stock prices amid the latest trade escalation with China now give us a pretty clear idea what Trump’s threshold for investor pain really is. Stocks tumbled after Trump announced on May 5 that he would raise tariffs on Chinese imports. When he actually did it, on May 10, the selloff continued, with the S&P 500 index down more than 4% from levels before the new tariff announcement.

Then Trump intervened. Midday on May 10, he said talks with China remain “constructive,” as did Treasury Secretary Steven Mnuchin. Trump also said his relationship with Chinese president Xi Jinping was “strong.” Markets interpreted those comments as a sign a deal was still possible and the new tariffs might not last. Stocks turned around and ended the day positive.

The optimism didn’t last. There was another trade-related selloff May 13, when China said it would retaliate with higher tariffs on U.S. exports to China. The S&P 500 fell 2.4% for the day, bringing it close to a 5% loss for the six days since Trump announced the new tariffs.

The next day, Trump fired off 10 tweets specifically about the trade dispute with China, making it his top Twitter topic of the day. Trump announced a new plan to aid farmers hurt by the retaliatory Chinese tariffs. He encouraged Americans to buy products from a “non-Tariffed country instead of China.” He also said, “when the time is right we will make a deal with China,” which gave markets another excuse for optimism. Stocks rose 0.8% that day.

Sensitive to declining stocks

Trump is reassuring markets with words, not actions, and markets aren’t assuaged long by unkept promises. So Trump will have to deliver a real deal at some point, to keep markets buoyant. But there’s reason to think he will, because he’s surprisingly sensitive to declining stocks.

His threshold for pain seems to be around a 5% drop in stock prices that can be linked with his trade wars or other policies. Trump claims the outcome of his trade wars will be good for the U.S. economy in the end, and worth some short-term pain. But many economists disagree, and Trump is showing reluctance to go beyond incremental tariff increases and take bigger steps that could send markets into a deeper tailspin.