Normally, it’s a mistake to blame the fluctuations of the stock market on the actions of just one person—even if they are president of the United States. But there is nothing normal about the Trump era. The stock market is in a tizzy, and the fault is not hard to find: Donald Trump. The S&P 500 is down 10.1 percent from its peak a month ago, which means technically we’re in a “correction.” If this slide continues on its current trajectory, it won’t be long before the correction turns into an outright crash, bringing in its wake a recession.

In 1929, at the start of the stock market crash that inaugurated the Great Depression, Variety ran the famous headline: “WALL STREET LAYS AN EGG.” It’s possible now to imagine the sequel: “DONALD TRUMP LAYS AN EGG.”

This economic turmoil is due to two factors: Trump’s erratic policy shifts and Wall Street’s initial misjudgment about Trump. When Trump won his second presidential term in November, Wall Street enjoyed a strong rally because it expected Trump to govern as he did in his first term. In 2017, Trump came into office talking like a radical economic populist—but his actual performance was as a standard big-business Republican, more interested in tax cuts and deregulation than industrial policy or empowering workers. True, Trump did initiate a new trade war with China (a policy Joe Biden continued) and renegotiated NAFTA (now rebranded the United States-Mexico-Canada Agreement or USMCA).

But both changes were less revolutionary than they seemed. The move toward seeing China as an economic threat had already started under Barack Obama; and USMCA is basically a cosmetic change of NAFTA. In other words, both policies were part of a longer continuity. Beyond that, Trump often relied on standard Republican businessmen like Federal Reserve chairman Jerome Powell and Treasury Secretary Steven Mnuchin, both avatars of the stability of well-entrenched capitalism. On foreign policy, Trump’s reliance on military men like John Kelly and Mark Milley made sure he didn’t stray too far from the national security consensus either. True, Trump’s White House was a hothouse of intrigue and infighting, but in terms of policies it was much more like a conventional Republican administration than anyone had expected.

Anticipating Trump 2.0 to be a repeat of Trump 1.0, Wall Street looked forward to another round of tax cuts and deregulation, with the threat of a new trade war viewed as largely rhetorical. Unfortunately, Trump and his circle had been radicalized by being out of office. Trump seems to have decided that for his second term as president, he really was going to live up to the MAGA agenda of protectionism and foreign policy unilateralism.

Instead of Steven Mnuchin, Trump’s main economic adviser now is Elon Musk—a product not of blue-chip Wall Street but of swashbuckling Silicon Valley. Musk, now tasked with gutting the administrative state, came from a world where disrupting entrenched practices and government/business synergy are seen as the keys to wealth. Suddenly, acne-infested Sanford students—some of them literal teenagers—were in charge of slashing government agencies.

Trump’s Secretary of Commerce, Howard Lutnick, shares his boss’s passion for kicking-and-biting tariff fights. The United States suddenly found itself in a series of tussles with Canada, Mexico, China, and the European Union. These trading partners also expected a return to the transactional Trump of the first term and were startled to discover that this time he’s really committed, although erratically so, to trade wars. The pattern over the past few weeks is for Trump to raise tariffs—and then start lowering them when met with retaliation and when the stock market sinks.

As The New York Times reports, European officials were shocked when Trump turned out not to be “transactional” but simply irrational:

As a tit-for-tat trade war kicks into gear, Europe is facing a difficult reality. It is not clear to many European officials what exactly Mr. Trump wants. Tariffs are sometimes explained by administration officials as an effort to level the playing field, but they are also cited as a tool for raising money for U.S. coffers to pay for tax cuts, or floated as a way to punish the E.U. for its regulation of technology companies.

Trump’s incoherent policy, which shifts wildly from day to day, is spooking Wall Street. Another New York Times article reports that the current stock market slide is motivated by “investors’ growing pessimism about the whipsawing policy pronouncements coming from Washington over the past few weeks. On-again, off-again tariffs and mass layoffs of federal workers have fomented unease on Wall Street.”

Wall Street might be uneasy, but it is also, so far, remaining quiet. A major feature of Trump’s second term is not only a much more radical set of policies but also a pervasive fear in many institutions of offending the president, who has shown every inclination to use both his bully pulpit and the instruments of state power to punish perceived enemies.