WASHINGTON, July 9 (Reuters) – The U.S. Federal Reserve is considering a rule change that could save the country’s eight largest banks combined billions of dollars in capital, in a potential long-sought win for the industry, according to four people with knowledge of the matter.

At issue is how the central bank calculates an extra layer of capital it imposes on U.S. global systemically important banks (GSIBs), known as the “GSIB surcharge,” which it introduced in 2015 to boost their safety and soundness.