Open this photo in gallery: A worker exits the Citi headquarters in New York, on Jan. 22, 2024.Brendan McDermid/Reuters Citigroup’s C-N profit surged in the first quarter as its traders reaped a windfall from volatile markets that fuelled client activity. The third-largest U.S. lender’s earnings echoed those of Wall Street rivals, including JPMorgan Chase JPM-N, Goldman Sachs GS-N and Morgan Stanley MS-N, where results were also lifted by stronger equities trading. Stock trading jumped in the first three months of the year as investors rejigged their portfolios during a period of heightened uncertainty over President Donald Trump’s tariffs and the...