On the evening of October 6, 1979, eight weeks into his Fed chairmanship, Paul Volcker convened an emergency Saturday meeting of the Federal Open Market Committee. US inflation had reached 13%; the dollar was collapsing; previous tightening attempts had been timid. Volcker shifted operational targets from the federal funds rate to bank reserves, accepting whatever rate volatility resulted. Over the next twenty-six months the funds rate hit 20%, unemployment hit 10.8%, Volcker was burned in effigy on the steps of the Eccles Building, and inflation broke — 13.5% in 1980 to 3.2% by 1983. October 1979 is the conventional starting point of the modern central-banking era: independent technocratic authorities, inflation targeting as operational objective.
A modern central bank performs four core functions: monetary policy (setting short-term rates and, since 2008, the balance-sheet size), banking supervision (capital and liquidity requirements, intervening at failure), lender of last resort (emergency liquidity to solvent-but-illiquid institutions — Walter Bagehot's 1873 Lombard Street dictum: lend freely, at high rates, against good collateral), and payment-system infrastructure (Fedwire, TARGET2). The monetary-policy toolkit evolved from pre-2008 open-market operations to a post-2008 regime built on interest on reserves, forward guidance, and quantitative easing — large-scale asset purchases invented by the Bank of Japan in 2001 and now standard. The inflation-targeting framework that organized the post-Volcker era began with the Reserve Bank of New Zealand in 1990 and spread through the Bank of England, Canada, Sweden, Australia, and the European Central Bank (Maastricht-mandate price stability alone). The Federal Reserve's dual mandate (employment plus price stability) adopted a 2% inflation target through the Alan Greenspan–Ben Bernanke era and formally in January 2012. John Taylor's 1993 rule — funds rate = neutral rate + 1.5 × inflation gap + 0.5 × output gap — became the standard benchmark. Central-bank independence became the norm: the Bank of England in 1997, the Bank of Japan in 1998, the Reserve Bank of India in 2016. The 2008 GFC and 2020 COVID shock rewrote the playbook: rates to the zero lower bound, the Fed balance sheet from $0.9T to $8.9T at peak, then the 2022-23 tightening (Fed funds 0.25% → 5.50%, ECB −0.5% → 4%) that broke the 9.1% June 2022 inflation surge. Institutional credibility of inflation-targeting central banks survived the largest stress test in their history.
Jerome Powell's Fed has been defined by COVID emergency response, the 2022-23 tightening cycle, and a soft-landing thesis playing out — disinflation without recession. Quantitative tightening is unwinding the pandemic-era balance sheet at ~$60B/month. US Treasury debt service hit $1 trillion per year in fiscal 2024, surpassing defense spending — fiscal-monetary tension that will shape policy through the late 2020s. Central-bank independence is contested again: Turkey under Erdoğan, Argentina's dollarization push under Milei, and the question of how the next US administration engages with Fed independence. Central Bank Digital Currencies are in active development (China's e-CNY operational, ECB digital euro in preparation). Modern Monetary Theory (Stephanie Kelton) peaked in 2020 and receded after the 2022 inflation surge.