The largest U.S. bank's strong third quarter did not insulate its leaders from being pressed about the downside of pricey investments in technology, whether capital rules make commercial lending growth hard for big banks to achieve, and whether another economic downturn is edging closer.

The banking agencies should expand the use of regulatory sandboxes to keep pace with international counterparts.

The Pittsburgh bank reported a double-digit increase in 3Q profits on a mix of higher loan yields in its retail and corporate banking units, higher corporate service fees and several other factors.

The interest-rate moves stoking President Donald Trump’s ire are also fueling Citigroup Inc.’s profits.

The biggest U.S. bank leaned on old-fashioned lending in the third quarter to weather a slump in fixed-income trading.