Alan Greenspan, the Federal Reserve chairman who presided over the longest peacetime economic expansion in U.S. history and coined the phrase “irrational exuberance,” died Monday at his home in Washington, D.C. He was 100 years old. His death was confirmed by his wife, NBC News anchor Andrea Mitchell, who said he passed from complications of Parkinson’s Disease. The Fed said it was “deeply saddened” and credited Greenspan’s “contributions to monetary policy and economic thought” as leaving a “lasting mark on this institution.”
Greenspan was appointed Fed chairman by President Ronald Reagan in 1987 and held the post through four more presidents, serving until 2006 in the second-longest tenure in the institution’s history. During his 18 years at the helm, he navigated the 1987 stock market crash, the dot-com boom and bust, the 9/11 attacks, and the early 2000s recession. His loose monetary policy in the early-to-mid 2000s is frequently cited as a contributing factor to the 2008 financial crisis, a legacy he acknowledged with characteristic candor. At various points, the federal funds rate under his watch ranged from as high as 9.75% to as low as 1%. His December 1996 speech warning of “irrational exuberance” in stock valuations famously sent global markets tumbling overnight, only for them to recover and rally sharply higher for years afterward.
For investors today, Greenspan’s legacy serves as both a case study and a cautionary tale. His era demonstrated that central bank credibility and the words of Fed chairs can move markets instantly. That dynamic is just as alive today, as current Fed Chair Kevin Warsh navigates a more hawkish posture in 2026. Greenspan’s long tenure also underscores the compounding power of staying invested through volatile cycles. The S&P 500 gained roughly 1,000% during his chairmanship despite several major crashes. Investors who panic-sold at each inflection point missed enormous recoveries. In a week when Treasury yields are rising and the Fed’s next move is in question, Greenspan’s career is a reminder that monetary cycles end, and long-term investors who maintain discipline across them are consistently rewarded.
