President Donald Trump's first 100 days in office, set to deliver the worst start for stocks since former President Richard Nixon's second term in 1973, have stoked volatility across markets and created expectations of a semi-permanent state of uncertainty.

The stock market’s lackluster performance under Trump only ranks ahead of the starts of Franklin D. Roosevelt’s terms in 1933 and 1937, during the depths of the Great Depression. It also outstrips both Ford and the start of Nixon’s second term in 1973, when the U.S. confronted another economic crisis in the form of stagflation.

U.S. stocks closed out Donald Trump’s first 100 days back in the Oval Office on a sour note, with the president’s trade policies taking the blame for derailing a thriving market and stoking fears the world’s largest economy could slip toward recession.