The Federal Reserve is monitoring the COVID-19 issue and its economic effects, according to a release from the central bank, attributed to Chairman Jerome Powell, released Friday.

Sens. Pat Toomey of Pennsylvania and Richard Shelby of Alabama had been among a handful of Republicans who had expressed uneasiness with Judy Shelton's views on monetary policy.

Three key Republicans on the Senate Banking Committee said Monday that they remain undecided on President Donald Trump's nomination of Judy Shelton to the Federal Reserve Board.

A proposed change could resurrect bond buckets, but loan industry observers also point to "covered fund" changes shielding loans from a potentially disruptive court decision.

Both Democrats and Republicans aired concerns about controversial statements made by Judy Shelton on monetary policy, deposit insurance and other issues, raising doubts about her confirmation.

Federal Reserve Chairman Jerome Powell told senators that the central bank is willing to explore a credit-sensitive interest benchmark in addition to the secured overnight financing rate, which some banks say could cause problems during economic stress.

The biggest issuers of bonds tied to the benchmark tapped to replace U.S. dollar Libor are suddenly pulling back, a potential blow to efforts by regulators to wean the financial system off a much-maligned reference rate.

Nonbanks hold a disproportionate percentage of the worst-rated loans, but banks hold a majority of the market, and risk management safeguards are largely untested, according to an interagency report on shared national credit.

In another rollback of the bank trading ban, the federal agencies unveiled a plan to allow financial institutions to invest in multiple companies through certain fund structures.

Regulators already finalized a rollback of the proprietary trading ban section of the rule but signaled then that their overhaul was not finished.