Ever since his improbable victory in November 2016, U.S. President Donald Trump has been inextricably tied to the fortunes of the stock market. At no time in modern history has the leader of the free world made rising share prices such a singular barometer of his success, or claimed so much credit for the record-shattering run.

But now, it's all coming crashing down.

After a stunning sell-off that ranks with the most violent ever, the Trump bull market — punctuated by his trademark tweets — is being laid low by a worldwide pandemic that threatens to sink the global economy. The Dow Jones Industrial Average has lost more than 30 percent of its value in just over a month, wiping out all its gains since Trump was inaugurated three years ago and putting the rally since Election Day in jeopardy.