U.S. securities regulators adopted rules on Wednesday designed to curb the risk of investor runs on money market funds, capping the end of a years-long heated debate between regulators and the industry dating to the financial crisis.
The Securities and Exchange Commission approved the measure in a 3-2 vote, with Republican SEC Commissioner Michael Piwowar dissenting and Democrat Kara Stein dissenting.
Read MoreCNBC Explains: Money market funds
The SEC's rule will require prime money market funds to move from a stable $1 per share net asset value, to a floating NAV. It also will let fund boards lower redemption "gates'' and fees in times of market stress.