So much for the art of the deal.

After U.S. stocks rallied Monday, following President Trump’s announcement that tariffs on $200 billion in annual imports from China would not be lifted to 25% from 10% for at least 90 days, stocks fell sharply Tuesday.

Trump assigned himself the nickname “Tariff Man,” while saying via Twitter that a deal with China would “probably” happen. Alas, the stock market doesn’t like uncertainty.