The Financial Stability Board, whose members include the U.S. Federal Reserve and the Bank of England, recommended that regulators bolster oversight of exchange-traded, mutual and other funds to ensure they can withstand market stress.

As health savings accounts play a larger role in proposed replacements to the Affordable Care Act, they may become a larger part of retirement planning too.

What 401(k) call-center representatives say to participants will be subject to the DOL fiduciary rule, but plan providers are taking different approaches to managing this fiduciary risk -- which means plan sponsors will have to step up their monitoring.