The JPMorgan Chase chief has long been skeptical of the nontraditional, and less regulated, lending business. Now he thinks its best days may be over.

President Donald Trump has said it is "highly unlikely" he will fire the head of the US central bank, hours after asking lawmakers whether he should sack Jerome Powell. Stock markets and the dollar slipped following reports Trump had broached the idea with Republicans on Tuesday but quickly bounced back after he downplayed the discussions.