Citigroup reported second-quarter results on Tuesday that topped analyst expectations after a three-month period that saw the bank's stock dramatically outperform the market.Citigroup's net income of $4.

Stocks and bonds have whipsawed since April, when U.S. President Donald Trump stunned markets by announcing sweeping tariffs against major trading partners. Volatility tends to help Wall Street trading desks as clients rush to adjust their portfolios.

Citigroup, the third-largest U.S. bank by assets, reported second-quarter net income of $4 billion, up 25% from a year earlier. The bank said higher revenue drove the earnings jump, partially offset by increases in the cost of credit and expenses.