The Turkish lira was never a hyperinflation in the technical sense, and that is precisely what makes it an instructive case: it was a high inflation that simply refused to end, grinding on for three decades until the currency had accumulated so many zeros it became a national embarrassment. From an average of roughly 9 lira to the US dollar in the late 1960s, the first lira slid to about 1,650,000 to the dollar by late 2001. The Guinness Book of Records named it the world’s least valuable currency for most of the years between 1995 and 2004. The largest banknote ever issued was the 20,000,000-lira note of 2001 — twenty million lira, worth perhaps a dozen dollars. The verdict is Redenominated, and the redenomination came not after a collapse but after a cure: on 1 January 2005 the New Turkish Lira replaced the old at 1,000,000 old : 1 new, striking off six zeros at a stroke.
The mechanism was chronic peacetime deficit monetization. For decades Turkish governments ran large budget deficits — driven by public-sector enterprises, agricultural support, populist spending cycles, and a heavy interest bill on domestic debt — and financed them in part through the central bank’s printing and through borrowing at punishing real interest rates. Annual inflation settled into a persistent band, routinely above 60% in the early 1990s and peaking at about 105% in 1994 amid a currency crisis. It is essential to be precise here: even at its worst, Turkish inflation never reached the Cagan hyperinflation threshold of 50% in a single month. It was a severe, chronic high inflation — the kind that does not produce a wheelbarrow-of-cash photograph, but quietly destroys savings, indexes the whole economy to the dollar, and forces banknotes to grow zeros year after year.
The crisis that finally forced the reckoning came in 2000–2001. An IMF-backed, exchange-rate-anchored disinflation program launched in December 1999 ran into a banking crisis and a speculative attack; in February 2001 Turkey was forced to float the lira, which promptly lost much of its value, and the economy contracted sharply. Out of that crisis came a genuine stabilization: a strengthened, more independent central bank, fiscal discipline, and a credible inflation-targeting framework that finally pulled annual inflation down to single digits by 2004 — the first time in a generation.
Only once the inflation was beaten did Turkey address the zeros. A law passed on 28 January 2004 authorized lopping six zeros off the currency, and on 1 January 2005 the New Turkish Lira (Yeni Türk Lirası) was introduced at 1,000,000 old lira to 1 new lira. The two circulated together through 2005; the “Yeni” prefix was itself dropped at the start of 2009, leaving simply the Turkish lira. This was a redenomination layered onto a stabilization that had already held — which is why it stuck, and why it belongs in the amber column rather than among the currencies that merely renamed their problem.
The Argentine convertibility peso is the rare Zero Hour case that died not of too much inflation but of too little flexibility. It was born as the antidote to the hyperinflation chronicled in PP-002 — the austral that disintegrated in 1989, when prices rose roughly 200% in the single month of July and around 5,000% across the year — and for a decade it worked spectacularly. Then, in January 2002, after a sovereign default and a deposit freeze that pried the country’s savings out of its own hands, the government repealed the law that had defined the currency and let the peso float. It fell from one-to-one with the US dollar to nearly four-to-one within months. The verdict is Devalued: not a hyperinflation, not a redenomination, but the collapse of a hard peg and the roughly 70–75% depreciation that followed.
The cure had been brutally simple. The Convertibility Law, which took effect on 1 April 1991 under President Carlos Menem and Economy Minister Domingo Cavallo, fixed the currency at one peso to one US dollar and required the central bank to back the monetary base substantially with dollar reserves; in 1992 the peso convertible (ARS) formally replaced the austral at 10,000 australes to one peso. The arrangement functioned as a near-currency-board: the central bank could not simply print to cover deficits, because every peso in circulation had to be answerable to a dollar in the vault. The inflation tax that had defined Argentine life for forty years was abolished by statute. Annual inflation, which had averaged some 600% from 1983 to 1991, fell to about 4.6% a year from 1992 to 1998; for a time, capital poured in and the economy boomed.
The trap was the rigidity itself. A peg that cannot move forces all adjustment onto everything else — wages, prices, employment, output. When the dollar strengthened in the late 1990s, when Brazil devalued its real in 1999, and when commodity prices sagged, Argentine exports priced in expensive dollars became uncompetitive, and a recession that began in the third quarter of 1998 ground on with no exchange-rate escape valve. The government, barred from monetizing its deficits, borrowed instead — and the debt mounted until markets stopped lending. By late 2001 the peg’s two preconditions, external financing and fiscal discipline, had both failed.
The end came in weeks. On 1 December 2001 Cavallo imposed the corralito — the “little fence” — capping bank withdrawals at 250 pesos a week to stop a run; meant to save the banks, it detonated the politics. Riots and a revolving door of presidents followed; in late December 2001 Argentina suspended payments on its sovereign debt, the largest default in history to that point (figures range from roughly US$93 billion to as much as US$132 billion depending on what is counted). In early January 2002 President Eduardo Duhalde’s government repealed the Convertibility Law and floated the peso. It overshot to nearly four per dollar by mid-2002 — devalued, not abolished, but the decade-long promise of one peso, one dollar was over.
The Ecuadorian sucre is the Zero Hour case that ended by abolishing the question. Faced with a banking collapse, a deposit freeze that locked citizens out of their own accounts, and a currency in free-fall, Ecuador did not redenominate the sucre or re-peg it; in January 2000 it gave up monetary sovereignty altogether and adopted the US dollar as legal tender. The conversion was set at 25,000 sucres to one dollar — the rate at which a 116-year-old currency, born in 1884, was retired. The verdict is Dollarized: the sucre did not survive in any form. It was exchanged for greenbacks and withdrawn from circulation, and Ecuador has used the US dollar ever since.
The collapse was a banking crisis first and a currency crisis second. Through the 1990s Ecuador carried chronic deficits and a fragile, newly liberalized financial sector; then a cluster of shocks — the 1997–98 El Niño that wrecked agriculture, the 1998 oil-price crash that gutted government revenue, and emerging-market contagion — pushed weak banks toward insolvency. As depositors fled and the state poured money into bailouts and deposit guarantees, the sucre buckled, losing roughly 67% of its foreign-exchange value over 1999 — from around 6,800 per dollar at the start of the year toward 18,000 by year-end, then plunging again at the turn of 2000.
The defining act of the crisis came on 8 March 1999, when President Jamil Mahuad declared a feriado bancario — a bank holiday — that shut the banks and was followed by a freeze on deposits, locking much of the country’s savings inside accounts for between six months and a year. The freeze stopped the immediate run but shattered confidence: a population that could not reach its own money had no reason to hold a currency it watched depreciate by the day. Money velocity collapsed into the dollar; Ecuadorians priced, saved, and increasingly transacted in greenbacks while the sucre raced toward worthlessness.
With the currency near 25,000 to the dollar and falling, Mahuad announced on 9 January 2000 that Ecuador would adopt the US dollar. The decision cost him his office within weeks — an indigenous-led uprising with military backing forced him out on 21 January — but his successor, Gustavo Noboa, carried dollarization through. The dollar became legal tender on 13 March 2000; the sucre ceased to be legal tender on 11 September 2000, redeemable at 25,000 per dollar through 30 March 2001. Inflation spiked to about 96% in 2000 as prices completed their adjustment, then fell sharply once the dollar anchor took hold. A currency that had outlived three generations was gone.