It blamed the profits dive on a string of one-off charges, such as the sale of its Brazilian operations, as well as hefty write-downs from a restructuring. In its annual report published alongside the results, HSBC said the FCA was investigating the bank's " compliance with UK monetary laundering investigations and financial crime systems and control requirements". It confirmed the FCA has launched an enforcement action against the group, which can result in potential fines, while it added US regulators also remain concerned over the bank's measures to improve anti-money laundering defences. HSBC's shares dived by as much as 7% after its annual results, branded "disappointing" by City experts. It also sparked share falls for rivals as the figures - the first from the major UK players - raised fears of a worse-than-expected annual results season for the sector. Chief executive Stuart Gulliver said he would "leave no stone unturned" as he looks to bring the bank's financial crime controls up to scratch.