Alan Greenspan’s tenure as chair of the Federal Reserve, beginning with his confirmation on August 3, 1987, marked a pivotal era in U.S. monetary policy characterized by significant financial upheavals, political tensions, and economic expansions. His leadership was immediately tested two months into his term during the 1987 stock market crash, known as Black Monday, when the market fell by 22.5 percent in a single day.

Greenspan was in Dallas scheduled to deliver a speech when the White House arranged for an Air Force jet to bring him back to Washington amid the crisis. Recognizing the risk of a systemic collapse if banks curtailed lending, Greenspan, alongside New York Fed President E. Gerald Corrigan, opted for a succinct and reassuring public statement. Issued on October 20, 1987, it pledged the Federal Reserve’s readiness to provide liquidity to support the financial system. This statement, coupled with private interventions encouraging banks to maintain credit lines, helped stabilize markets and limited the crash’s economic impact, enhancing Greenspan’s reputation as a financial strategist.

Throughout his early years, Greenspan confronted persistent pressure from members of the Reagan and Bush administrations, who favored lower interest rates to stimulate short-term economic growth. Notably, in August 1988, Greenspan advocated raising a key bank lending rate by half a percentage point, an action opposed by Treasury Secretary James A. Baker III, reflecting the administration’s desire to maintain robust growth ahead of the 1988 presidential election. Conservative criticism of Greenspan’s cautious approach to rate cuts persisted, and President George H.W. Bush’s delayed decision to reappoint him in 1990 was reportedly influenced by concerns about Greenspan’s willingness to keep rates low. Greenspan himself suggested that Bush viewed him as the “least worst choice” for the role.

During the Clinton administration in the mid-1990s, Greenspan benefited from a hands-off approach by the government, which allowed him to capitalize on an expanding economy marked by low unemployment and accelerating productivity gains. Contrary to concerns that rapid growth would trigger inflation, Greenspan attributed sustained economic expansion to technological advances and productivity improvements, justifying his preference for relatively lower interest rates. His decision to reduce rates during the 1998 East Asian financial crisis further supported an ongoing bull market despite external shocks.

Entering the 2000s, Greenspan faced a new set of challenges following the bursting of the dot-com bubble and the September 11 terrorist attacks. He led the Fed through aggressive rate cuts, reducing the federal funds rate to 1 percent by mid-2003. This accommodative policy helped mitigate the 2001 recession but also contributed to a prolonged period of slow economic growth and raised concerns about potential deflation. Greenspan favored maintaining low rates for a "considerable period," a stance linked to a significant housing market boom in which national home prices nearly doubled between 2000 and 2006.

Critics have argued that the Federal Reserve under Greenspan failed to adequately regulate mortgage lending practices, despite having statutory authority to do so. Ben S. Bernanke, Greenspan’s successor, later described this as one of the Fed’s most serious oversights. In response to such criticism during his 2010 testimony before the Financial Crisis Inquiry Commission, Greenspan acknowledged the inherent difficulties regulators face in predicting crises. He defended his track record by noting that accuracy in economic forecasting is inherently limited, stating he was "right 70 percent of the time" throughout more than two decades in government.

Greenspan’s complex legacy includes his role in bipartisan policymaking efforts such as the Social Security Commission, where he participated despite a fundamental opposition to social insurance programs, and a personal relationship that began with journalist Andrea Mitchell in the early 1980s. Throughout his career, he navigated political pressures, economic cycles, and market volatility, leaving behind a record that continues to inspire debate over the balance between monetary policy, regulatory oversight, and economic growth.