Corporate borrowers are coming under stress even as the rest of the economy looks strong, top Apollo exec says

• There are "pockets of stress" within an otherwise strong US economy, Apollo's co-president Jim Zelter said.
• Many corporate borrowers are grappling with high debt and a slow recovery from the pandemic. 
• Zelter said he sees signs of "hardening of economic conditions" coming. 

Corporate borrowers represent "pockets of stress" within an otherwise robust economy, according to Apollo Global Management co-president Jim Zelter.