With markets crashing after U.S. President Donald Trump announced his latest tariffs, Citigroup’s banking head Viswas Raghavan called a global meeting of senior bankers on Monday and told them to get on the phone with their clients.

A day after recording its best gain since 2008, the S&P 500 fell 3.5 percent on Thursday, showing that fears about tariffs hampering economic growth were still alive.

The S&P 500 sank 4.8%, more than in major markets across Asia and Europe, for its worst day since the pandemic crashed the economy in 2020. The Dow Jones Industrial Average dropped 1,679 points, or 4%, and the Nasdaq composite tumbled 6%.