Investors worry the drop in crude prices could spark a rash of defaults; the bank denies it opened accounts without customer permission to meet sales quotas.
Recognizing the sizable opportunity in batteries, some project finance banks have recently begun supporting battery developments, and others expect to follow soon.
The San Francisco bank reduced its outlook for net interest income this year and cautioned that the outbreak's economic effects could take an even bigger bite out of profits.
The acquisition of the Texas-based lender will help Regions expand its offerings to small businesses while adding about $2 billion of loans to the bank's balance sheet.
Executives outlined changes in energy lending policies, said that the largest U.S. bank has only scratched the surface in middle-market credits and discussed their preparations in case of an economic slowdown.