WASHINGTON (AP) — U.S. regulators have approved a rule that seeks to defuse the kind of risk-taking on Wall Street that helped trigger the 2008 financial crisis.

The Volcker Rule is expected to change the way the largest U.S. banks do business. It strives to limit banks’ riskiest trading bets that could implode at taxpayers’ expense. Some think the rule goes too far, others not far enough.