Suspicion is rising that Trump and his aides are manipulating stocks via tariff announcements. Is that even possible?

Second, the U.S. stock market recovered remarkably quickly from the tariffs imposed during the first Trump administration. Specifically, while the S&P 500 declined 19.8% over a three-month period between September and December 2018, the index had already recouped its losses and reached a new high by May 2019.