Regulators are finalizing the details of a proposal designed to help buffer against a prolonged market crisis by instituting a liquidity requirement for financial institutions. The proposal is expected as early as this summer.

"U.S. banking agencies are largely expected to adhere closely to the revised global liquidity rules, but there are still several key aspects that regulators must adjust in order to match the requirements of Dodd-Frank Act," writes American Banker's Donna Borak.

"These quantitative liquidity requirements would complement the stricter set of qualitative liquidity standards that the Federal Reserve has already proposed pursuant to section 165 of the Dodd-Frank Act" Fed Gov. Daniel Tarullo said in prepared testimony before the Senate Banking Committee in July.

It is still unclear as to what institutions must comply with the rule.

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