Rule saves Wall Street banks billions of dollars a year because they no longer must post initial margin on trades with their affiliates.

CFTC may endorse reduction of collateral requirements for derivatives trades between big banks' affiliates.

Change is expected to save big banks billions.

Plan to require Wall Street to 'live up to its proper role in our economy' unlikely to pass gridlocked Congress.

U.S. regulators said to have decided to offer banks a lucrative concession that would remove collateral requirements on swaps trades with overseas affiliates.

U.S. investigation of alleged manipulation of currency markets is said to expand to include Russian ruble and Brazilian real.

Clearinghouses and Wall Street say leverage-ratio rule needs to change so cost of derivatives trades doesn't skyrocket.

CFTC commissioner Mark Wetjen is leaving after almost four years.