Deutsche Bank said its first-quarter profit rose 10% as its investment-banking business beat expectations. The quarter saw a reversal from 2023, with investment banking doing better than its bread-and-butter lending and deposit-taking business, which gained last year from higher interest rates that are now normalizing. Chief Executive Christian Sewing said those businesses are holding up better than expected, and the good first-quarter results give the bank confidence it can advance in talks with the regulator to launch further share buybacks.