In a joint statement, the US regulators said the new agreement reached Sunday in Basel, Switzerland, "provides for a more stable banking system that is less prone to excessive risk-taking." Federal Reserve Chairman Ben Bernanke; Sheila Bair, head of the Federal Deposit Insurance Corp., and John G. Walsh, the acting head of the Office of the Comptroller of the Currency, participated in Sunday's discussions in Switzerland. Their agencies issued the joint statement.

The US agencies already have the authority to institute tougher capital standards under the sweeping financial overhaul legislation that Congress passed and President Barack Obama signed into law in July. That bill requires the largest US banks to establish more stringent capital and liquidity standards.

The legislation capped nearly two years of intense debate over how to avoid a recurrence of the 2008 financial meltdown that pushed the US into the worst recession since the 1930s.

The new global rules are expected to be endorsed by Obama and other leaders of the Group of 20 major economies when they meet in November in Seoul, South Korea. Treasury Secretary Timothy Geithner has been leading the effort among G-20 finance ministers to get international backing for the new capital standards.

He has argued that the rules must be implemented in a coordinated manner so that countries don't try to obtain unfair competitive advantages by allowing their banks to operate under less stringent standards.