In July 1946 the Hungarian pengő achieved a record no currency before or since has matched: a monthly inflation rate of roughly 41.9 quadrillion percent — 4.19 × 10¹⁶ percent — which the Guinness World Records office and the Hanke-Krus World Hyperinflation Table both certify as the highest ever measured. At that pace prices doubled about every 15 hours and the pengő shed 90 percent of its value roughly every four days. The episode ended on 1 August 1946, when Hungary replaced the pengő with a new currency, the forint, at the almost incomprehensible rate of 400 octillion pengő — 4 × 10²⁹ — to a single forint.
The pengő had once been a model of stability. Introduced in 1927 to retire Hungary’s earlier post-Habsburg hyperinflation (the korona), it was for a decade one of central Europe’s most dependable units. The Second World War destroyed that. Hungary entered the war on the Axis side, became a battleground as the Red Army drove the Wehrmacht west in 1944–45, and emerged with an estimated 40 percent of its national wealth ruined or carried off. On top of that ruin came the bill: the armistice and the 1947 peace settlement obliged Hungary to pay 300 million US dollars in reparations, chiefly to the Soviet Union, plus the running cost of supplying occupying Soviet forces. A wrecked economy with almost no tax base was ordered to produce hard value it did not have, and the provisional government did the only thing it could — it printed.
What followed was not a slow slide but a vertical drop. By mid-1946 the pengő was being issued in denominations that had to invent new prefixes — the milpengő (a million pengő) and the bilpengő or B-pengő (a million milpengő, 10¹² pengő) — and the largest note actually put into circulation read 100 million B-pengő, that is 10²⁰, one hundred quintillion pengő. A note for one billion B-pengő (10²¹) was printed but never released because the currency died first. To run the tax and accounting system at all, the state ran a parallel inflation-indexed unit, the adópengő (“tax pengő”), recalculated daily; by 31 July 1946 a single adópengő was worth 2 × 10²⁹ ordinary pengő.
The cure was a deliberate, foreign-supported reset. The forint was launched against a backstop of gold and foreign exchange — much of it Hungarian gold reserves returned from the West — and a hard commitment to balance the budget and stop monetizing the deficit. It worked, and it held: the forint that replaced the most worthless money in history is still Hungary’s currency today.
The Greek drachma was destroyed not to finance a war Greece chose to fight, but to pay for its own occupation. Between April 1941 and October 1944, German, Italian, and Bulgarian forces occupied the country and extracted “occupation costs” — funds to billet, feed, and supply their armies, plus forced loans the occupiers never intended to repay. With taxation impossible, exports requisitioned, and the economy in ruins, the Bank of Greece was made to cover those demands the only way left to it: by printing drachmae without limit. By October 1944, as German forces withdrew and the Greek government returned to Athens, monthly inflation reached roughly 13,800 percent — prices doubling about every four and a half days — a rate the Hanke-Krus World Hyperinflation Table ranks among the worst ever recorded. The largest banknote issued read 100,000,000,000,000 — one hundred trillion — drachmae.
The mechanism was brutally direct. The occupiers presented their bills; the Bank of Greece printed to meet them. The note circulation rose by a factor in the hundreds of millions over the occupation, while the real economy contracted. Money lost meaning so completely that Greeks abandoned the drachma in daily life altogether, pricing goods in gold sovereigns, olive oil, and British military scrip — anything that held value when the national currency would not.
Before the hyperinflation reached its peak, the occupation produced a catastrophe that dwarfs any monetary statistic. Requisitions of food by the occupying armies, combined with the Allied naval blockade and the collapse of distribution, caused the Great Famine of the winter of 1941–42. An estimated 300,000 Greeks died of starvation and malnutrition over the occupation, the worst of it in Athens and Piraeus, where the dead were collected from the streets each morning. The currency’s destruction and the famine shared the same root — an occupation that took what it wanted and left a population to absorb the loss.
The end came in stages. On 11 November 1944, just weeks after liberation, a stabilization led by the British adviser Sir David Waley introduced a new drachma at 50,000,000,000 — fifty billion — old drachmae to one new. That first reform failed to hold; inflation persisted, and a second, lasting stabilization came only with the 1953–54 reform, when Greece joined the Bretton Woods system and issued a further new drachma at 1,000:1. The drachma survived to become Greece’s currency until the euro.
China’s gold yuan is the rare hyperinflation that was itself a hyperinflation cure — and one that failed faster than the disease it was meant to treat. By the summer of 1948 the Nationalist government’s existing currency, the fabi, had been printed into ruin by a decade of war: first the war against Japan (1937–45), then the civil war against the Communists. On 19 August 1948 the government of Chiang Kai-shek scrapped the fabi and issued the gold yuan at 3 million fabi to one, paired with price controls and a confiscation order requiring citizens to surrender their gold, silver, and foreign currency in exchange for the new notes. Within ten months the gold yuan had collapsed; in Shanghai, wholesale-price inflation peaked at roughly 5,070 percent per month in April 1949, by the Hanke-Krus measure, and the largest note in general issue read one million gold yuan. After the Communist victory the currency was superseded by the renminbi of the new People’s Bank of China, with the gold yuan converted out at 100,000 to one.
The mechanism that destroyed the fabi was straightforward war finance. The Nationalist state could not tax enough to fund its armies through eight years against Japan and the civil war that followed, so it covered the deficit by printing. The “gold yuan” reform did nothing to change that — despite its name it was not backed by gold — and so it inherited the same engine of deficit monetization while adding a fresh injury. The confiscation clause compelled ordinary Chinese to hand over their real wealth, their gold and silver and foreign exchange, for paper that the government then proceeded to print into worthlessness. Those who complied were ruined; those who hoarded their metal were spared.
The reform’s brief, brutal arc is best remembered through its enforcement. In Shanghai the operation was driven by Chiang Ching-kuo, the Generalissimo’s son, in a high-pressure campaign — the “tiger-beating” drive — that arrested speculators and hoarders to prop up confidence in the new money. It held for a matter of weeks. By late 1948 the price controls broke, goods vanished from shelves, and the gold yuan began the same vertical descent the fabi had taken. The new notes climbed through the thousands, ten-thousands, and hundred-thousands within months of issue.
By the time the People’s Liberation Army took the great cities in 1949, the gold yuan was finished as money. The People’s Bank of China, founded on 1 December 1948 and already issuing the renminbi across liberated areas, retired the gold yuan and unified the country’s chaotic currencies under the new unit — the money that anchors China to this day.
The “Mickey Mouse” peso — the fiat currency the Japanese occupation government issued in the Philippines from 1942 — was destroyed by unbacked over-printing and a wartime counterfeit flood, and it was retired by repudiation: on liberation in 1944–45 the notes were declared worthless and never redeemed. Unlike the great hyperinflations of self-financing treasuries, this was the money of a conqueror. After invading in December 1941 and seizing Manila in January 1942, Japan confiscated hard currency, suppressed the prewar Commonwealth peso, and replaced it with military scrip — notes that promised to pay the bearer but were backed by no gold, no silver, and no reserves of any kind. They were money only for as long as the bayonets behind them held the islands.
The over-issue was relentless, and so was the inflation. As the occupation’s costs mounted and the war turned against Japan, the authorities printed without restraint, and prices ran away: by late 1943 monthly inflation in the Philippines was running above 40%, reaching roughly 60% in early 1945. Filipinos nicknamed the notes “Mickey Mouse money” for their cartoonish worthlessness, and the artifacts of the collapse are vivid — by one wartime account 75 occupation pesos (about 35 US dollars at the time) bought a single duck egg, and in 1944 a box of matches cost more than 100 of them. The Japanese chased the spiral with ever-larger denominations, issuing 100- and 500-peso notes in 1944 and topping out at a 1,000-peso note by war’s end; in one four-week stretch in February 1945 they flooded in some 1.3 billion pesos of new currency.
The collapse was hastened by a second printing press the occupiers did not control. The United States, through the Office of Strategic Services, counterfeited the invasion notes en masse — supplying Filipino guerrillas, funding resistance, and deliberately debasing the occupation economy. Genuine and forged notes circulated indistinguishably, and the currency’s credibility, never strong, dissolved entirely.
The verdict was a decree, not a reform. As American and Filipino forces retook the islands in 1944–45, the restored Commonwealth government and the returning authorities repudiated the Japanese-issued peso: it ceased to be legal money, was never exchanged for the restored currency, and tons of it were burned. Holders left with nothing but suitcases of scrip received no redemption — the money died with the regime that issued it.
The old Taiwan dollar died on 15 June 1949, replaced by the New Taiwan dollar at the deliberately punishing rate of forty thousand old to one, as the Chinese Nationalist government lost the mainland and fell back on the island it had ruled for only four years. The old dollar was not destroyed by a war fought on Taiwan; it was wrecked by the war’s financial backwash — the collapse of the mainland’s gold yuan, the cost of arming and feeding a retreating army, and the simple fact that an island currency could not insulate itself from the disintegrating finances of the regime that issued it.
The old Taiwan dollar had circulated only since 1946, issued by the Bank of Taiwan after the island passed from Japanese to Chinese rule at the end of the Second World War. Two pressures then bore down on it. The first was inherited: the Japanese colonial administration had over-issued notes to fund its war effort, leaving a monetary overhang that exploded once wartime price controls lapsed. The second was imported: on the mainland, the Nationalists were financing the civil war against the Communists by printing the fabi and then, after the catastrophic August 1948 “gold yuan” reform, printing that too into worthlessness. Kuomintang military spending and budget deficits drained Taiwan’s resources into the mainland war, and the island’s prices soared.
By 1948 the Bank of Taiwan was printing 10,000-dollar notes and issuing bearer’s cheques denominated at one million Taiwan dollars; at the height of the inflation a kilogram of rice cost around 1.6 million old dollars and a single duck egg some 5,000. The old dollar fell faster the closer the mainland came to total Nationalist defeat, which arrived with the Communist victory and the Nationalist evacuation in December 1949.
The reform that retired it was engineered for credibility. The New Taiwan dollar, launched on 15 June 1949 by the Taiwan Provincial Government, was backed by gold and silver that Chiang Kai-shek’s government had shipped from the mainland — reported at some 800,000 taels of gold plus US$10 million and over ten million silver dollars — and its issuance was capped at NT$200 million. Provincial governor Chen Cheng made the new notes convertible into physical gold. The peg and the reserve, reinforced by American aid after the Korean War broke out in 1950, held the New Taiwan dollar, which remains Taiwan’s currency to this day.