No longer feared as “too big to fail”, shareholders are weighing whether HSBC is now “too big to succeed”, and want to know next week how the bank’s bosses propose to increase profitability at a sprawling group beset by huge costs. Investors believe CEO Stuart Gulliver and Chairman Douglas Flint need to announce bold moves to restore the London-based bank’s flagging fortunes at a strategy day on June 9. “This investor day is potentially a very significant event,” said Chris White, head of UK equities at Premier Asset Management, which owns HSBC stock.