Alan Greenspan, the former chairman of the U.S. Federal Reserve, died at age 100 [2].

Greenspan's tenure redefined how the Federal Reserve interacts with the economy, establishing a precedent for the central bank's role in stabilizing financial markets during periods of extreme volatility.

Greenspan served as the Federal Reserve chair for 18 years [1]. This tenure makes him the second-longest-serving chair in the history of the institution [1]. His approach to monetary policy and market intervention became a hallmark of the American economic landscape during his time in office.

One of the earliest tests of his leadership occurred shortly after he assumed the role. Greenspan had been the Fed chair for approximately two months [3] when the stock market experienced the crash known as Black Monday on Oct. 19, 1987 [3]. The event forced a rapid response from the central bank to prevent a broader systemic collapse.

Throughout his nearly two decades of leadership, Greenspan was credited with redefining the Federal Reserve's operational role [1]. His strategies focused on managing inflation and interest rates to maintain economic growth, though these policies remain a subject of study for economists analyzing the lead-up to later financial crises.

His death marks the end of an era for the U.S. financial system. The influence of his 18-year tenure [1] continues to shape the mandates, and expectations, placed upon current Federal Reserve leadership regarding market stability and inflation control.

Alan Greenspan, the former chairman of the U.S. Federal Reserve, died at age 100.

Greenspan's legacy is defined by the shift toward a more active Federal Reserve that intervenes to provide liquidity during market shocks. By reacting decisively to the 1987 crash, he established a blueprint for the 'Fed Put,' the expectation that the central bank will support markets during downturns, a philosophy that influenced global monetary policy for decades.