Greg van Inwegen is in the catastrophe avoidance business. As chief investment risk officer at Ivy Asset Management, a $15 billion fund of hedge funds, van Inwegen patrols his firm’s portfolios with an eye toward potential financial peril. His approach is informed by a hard-earned appreciation for the unexpected: On September 11, 2001, van Inwegen was working for Deutsche Bank in one of the buildings across from the World Trade Center.
