Citigroup posted a 42% jump in first-quarter profit, with earnings of $3.06 per share beating analyst estimates of $2.65 per share, the bank reported Tuesday. Revenue of $24.63 billion — the bank's highest quarterly figure in a decade — also topped Wall Street expectations of $23.55 billion. Geopolitical tensions that stoked volatility across asset classes helped push total markets revenue up 19% year-over-year to $7.2 billion, Reuters reported. Equities brought in $2.1 billion, a 39% year-over-year gain, ...