John Cortese runs Apollo's trading and portfolio management businesses and co-heads its corporate credit team, and his background as former Co-Head of US Credit Trading at Barclays shows in how he talks about markets—focusing on things like the $40 trillion investment-grade private credit opportunity, how public and private credit are converging, why some older bonds can act more illiquid than people think, and how funding the AI buildout will need many different types of financing rather than just one source. He brings a trader's eye to private investing, caring a lot about scale, speed, and relative value, while outside of work he serves on the Make-A-Wish Metro & Western New York board and Dartmouth's Hopkins Center for the Arts advisory board.