Alan Greenspan, who served as chair of the U.S. Federal Reserve from 1987 to 2006, has died, according to NBC News. He was 96 years old. Greenspan guided the American economy through several periods of growth and recession, including the dot-com bubble and the aftermath of the 9/11 attacks. Known for his independent and often enigmatic style, he became one of the most influential economic policymakers of the late 20th and early 21st centuries. His tenure was marked by a focus on deregulation and low inflation. Details surrounding his death have not yet been widely released. Greenspan’s long career also included work as an economic consultant before his appointment to the Federal Reserve.