HSBC Holdings beat forecasts with a 31 per cent rise in first quarter profit, bolstered by a surge in income from its core Asian business and lower costs that outweighed a poor performance from investment banking. Reining in costs has been one of the biggest challenges for HSBC chief executive John Flint, with the bank last year missing its target of "positive jaws" - which tracks whether the bank is growing revenues faster than costs. Europe's biggest bank by assets said operating expenses dropped 12 per cent in the January-March quarter, helped by one-off sales in its retail and commercial businesses and the non-recurrence of US regulatory fines for past misdeeds. Profit before tax rose to $6.21 billion from $4.76bn in the same quarter last year, above the $5.58bn average of analysts' estimates compiled by the bank. The results for the London-headquartered bank, which makes the bulk of its profits in Asia, showed both the benefits and costs of its global reach and business mix, at a time when other European lenders are shrinking. While HSBC's US business continued to drag down the group and its investment bank fared poorly compared with peers, the bank grew revenues 7 per cent in Asia and saw income in its retail and commercial banking divisions rise around 10 percent. "HSBC has been one of the few banks reporting first quarter earnings that showed a favourable revenue mix," analyst Joseph Dickerson at Jefferies said. HSBC's shares rose 2.5 per cent in London, against a 0.5 per cent rise in the STOXX European banks index. HSBC's trading business had a poor first quarter, in common with many of its U.S. and European rivals that saw revenues fall in subdued markets. HSBC's stock traders did particularly badly, with revenues tumbling 34 per cent excluding a favourable one-off provision, the worst performance of an equities business in the quarter among major US and European banks. While HSBC has been boosting spending to raise its market share in businesses such as retail banking and wealth management, investment banking has struggled with staff departures and slower revenue growth. The banking division, which advises clients on finance and mergers, has lost senior dealmakers and slipped down the rankings in merger advisory and equity capital markets amid internal questions over its strategic direction. The lender reshuffled the unit on Tuesday as former JPMorgan banker Greg Guyett put his stamp on the business. "We are always looking at parts of the business and trying to improve them, but there should be no dramatic changes," HSBC chief financial officer Ewen Stevenson told <em>Reuters </em>when asked if further changes were needed to the investment bank. HSBC warned in February it might have to delay some investments this year as it missed 2018 profit forecasts due to slowing growth in its two home markets of China and Britain. While the bank's pretax profit in Asia rose 5 per cent during the first quarter to $5bn, accounting for 81 per cent of overall profits, other regions fared worse. The bank said the turnaround strategy for its US business, which has for years underperformed, was progressing, but the task remained its "most challenging strategic priority". In the first quarter, North America posted a pretax profit of $379 million compared with a loss of $596m in the same period last year, as the bank increased retail customer numbers and capitalised on its international network, it said. HSBC also said expected credit losses in its commercial bank rose by $300m thanks mainly to small corporate exposures in Britain amid ongoing uncertainty over the country's departure from the European Union.