His bank has launched a Â£3.3 billion ($5.29 billion) rights issue in an attempt to raise its tier one capital ratio from nine per cent to 11 per cent, reports the Financial Times.
It is doing so after the Basel Committee on Banking Regulation agreed to introduce a seven per cent minimum limit for banks from 2019.
"We think most regulators will see Basel as the minimum," predicted Mr Sands.
"Many will go further faster."
The Basel announcement has already been followed up by the UK's Financial Services Authority, which stated it will introduce tougher measures of its own, with a ten per cent threshold thought to be likely.
Last month, European Central Bank president Jean-Claude Trichet said that global capital standards will be strengthened by the new rules, bringing about greater long-term stability to the financial sector.
By Tony Aynsley