Deutsche Bank has reported a 10% increase in first-quarter profit due to a surge in fixed-income trading and deal-making within its investment banking division. The bank’s net profit reached 1.275 billion euros ($1.37 billion), surpassing analyst expectations and offsetting declines in other divisions. The investment banking arm regained its position as Deutsche’s primary revenue generator, outperforming the retail division. This marks the 15th consecutive quarter of profitability for the bank, a significant milestone after years of losses.