Argentina's Convertibility Law of 1991 imposed a legal exchange-rate rule after repeated high inflation and hyperinflation had severely weakened confidence in domestic money. The law declared the austral convertible into U.S. dollars at 10,000 australes per dollar from 1 April 1991; when the peso replaced the austral in January 1992, the operational parity became one peso per dollar. Central-bank monetary liabilities were tied closely to foreign-exchange reserves and the scope for discretionary money creation was sharply restricted.
The regime reduced inflation rapidly and was accompanied by strong growth during much of the 1990s. It also changed how the economy could absorb later shocks. Without nominal depreciation, adjustment increasingly operated through domestic prices, wages, output, fiscal policy and financing conditions. By 2001–02, sovereign debt stress, recession, external shocks and the fixed exchange-rate constraint had become intertwined. The Independent Evaluation Office of the IMF describes the crisis as a failure of a broader policy configuration, not as evidence that the initial disinflation did not occur.
Initial condition: a nominal anchor problem after repeated inflation crises
Argentina entered 1991 after years of high inflation, episodes of hyperinflation and declining confidence in the domestic currency. The core policy problem was not only the current inflation rate. Economic agents had learned to shorten contract horizons, hold foreign currency and expect renewed monetary instability.
| Pre-convertibility condition | Implication for stabilization |
|---|---|
| High and unstable inflation | A new nominal rule needed to be immediately observable and credible |
| Currency substitution toward the U.S. dollar | Dollar parity could coordinate expectations but also deepen dependence on the anchor |
| Weak confidence in discretionary monetary policy | A legal constraint was designed to reduce room for monetary financing |
| Fiscal and external financing needs | A fixed rule would be durable only if debt and fiscal paths remained consistent with it |
| Trade and financial opening | Capital flows could support the regime in good conditions and amplify stress when confidence reversed |
The Convertibility Law therefore made the exchange-rate promise legally explicit rather than relying on a discretionary target.
Legal and monetary architecture
Law 23.928 established convertibility of the austral into the U.S. dollar at A 10,000 per dollar and required the central bank to sell foreign exchange for conversion at that relation. The later peso conversion maintained the equivalent one-peso-per-dollar parity. The broader framework linked monetary liabilities to reserve holdings and sharply constrained central-bank financing.
| Rule | Intended mechanism | Embedded trade-off |
|---|---|---|
| Fixed legal parity | Provide a simple nominal anchor visible to households and firms | Domestic prices could not be stabilized through exchange-rate adjustment later |
| Convertibility into dollars | Increase credibility of domestic monetary liabilities | Confidence became closely tied to reserve and financing conditions |
| Reserve-linked monetary base | Limit discretionary monetary expansion | Liquidity became more dependent on external flows and reserve movements |
| Limits on central-bank financing | Reduce fiscal monetization | Fiscal imbalances had to be financed through taxes, spending adjustment or debt |
The IMF's Independent Evaluation Office describes the arrangement as operating much like a currency board, while noting that it was not identical to the strictest classical currency-board design.
- History of high inflation + weak confidence in domestic money
- demand for a hard nominal commitment
- Legal dollar parity + reserve-linked monetary liabilities + limits on central-bank financing
- rapid change in inflation expectations
- disinflation
- Fixed parity persists while external conditions change
- nominal depreciation unavailable
- adjustment shifts to prices, wages, output, fiscal accounts and debt financing
- Financing stress + recession + debt vulnerability
- pressure on reserves and banking system
- collapse of the regime in 2001–02
The immediate inflation result was large
The IEO reports that monthly inflation fell from 27% in February 1991 to 2.8% in May. On a December-to-December basis, CPI inflation then declined from 84.0% in 1991 to 17.6% in 1992, 7.4% in 1993 and 3.9% in 1994.
View data
| Indicator / period | Value (% Dec/Dec) |
|---|---|
| 1991 | 84 |
| 1992 | 17.6 |
| 1993 | 7.4 |
| 1994 | 3.9 |
| 1995 | 1.6 |
| 1996 | 0.1 |
This is strong evidence of observed disinflation. It is not evidence that the exchange-rate rule alone caused every subsequent macroeconomic outcome. Convertibility coincided with fiscal changes, privatization, trade liberalization, financial reform and large capital inflows.
Growth and capital inflows strengthened the regime in its early years
Real GDP growth was strong in the early 1990s and averaged nearly 6% over 1991–98 according to the IEO, with a recession around the Mexican crisis in 1995. Large portfolio and direct-investment inflows supported domestic credit and reserves during much of the expansion.
That early performance changed the political and financial environment around the peg. A regime that had rapidly ended inflation acquired credibility from its visible results. But credibility also made exit progressively more costly as contracts, debts and financial practices adapted to dollar parity.
The mechanism therefore had path dependence: the longer the hard anchor persisted, the larger the stock of economic relationships built around it.
The same rule restricted later adjustment
A fixed exchange rate can remove one source of nominal instability while also removing nominal depreciation as an adjustment tool. When the U.S. dollar appreciated and Brazil devalued the real in 1999, Argentina faced a less favorable real exchange-rate environment. The IEO identifies this alongside fiscal weakness, rising debt and tighter financing as important vulnerabilities.
| Phase | Regime effect | Constraint exposed |
|---|---|---|
| 1991–94 | Rapid disinflation and renewed confidence | Sustainability still depended on fiscal and external consistency |
| 1995 | Mexican-crisis spillover tested the financial system | Capital-flow reversals could transmit strongly under the fixed regime |
| 1998–2000 | Recession and adverse external conditions | Real adjustment required deflation, productivity gains or fiscal compression rather than devaluation |
| 2001–02 | Debt and financing crisis intensified | Exit costs were large because contracts and balance sheets had adapted to parity |
The IEO's later assessment is critical of both Argentine policy choices and aspects of IMF engagement. Those are attributed institutional judgments, not a single uncontested causal decomposition of the crisis.
Fiscal policy, debt and balance sheets
Convertibility sharply constrained monetary financing, but it did not automatically enforce a sustainable consolidated fiscal path. Debt could still increase when spending, revenue and financing conditions diverged. Foreign-currency debt also meant that an eventual devaluation would worsen balance sheets measured in domestic currency.
This distinction matters for policy design. A hard monetary rule can constrain one margin of fiscal accommodation without eliminating the government's intertemporal budget constraint. If debt replaces money creation, nominal stability may coexist with increasing refinancing risk.
The banking system faced a similar issue. Dollar-linked liabilities and deposits could appear stable while the peg was credible, but a loss of confidence could convert exchange-rate risk into liquidity and solvency stress.
Distribution and social transmission
Disinflation reduced the erosion of cash incomes and improved the informational role of prices. At the same time, the later recession and unemployment imposed severe costs. The crisis of 2001–02 included deposit restrictions, default, sharp output contraction and political and social disruption.
These effects belong to different horizons. The initial stabilization should not be denied because the later regime collapsed; nor should the later costs be excluded from assessment because initial disinflation was successful. A policy case must keep target achievement and long-run resilience separate.
Why the regime became difficult to exit
An exchange-rate rule becomes harder to abandon when contracts, bank balance sheets and public debt are denominated or indexed in foreign currency. By the late 1990s and 2001, the IEO reports that extensive dollarization raised the expected cost of exit. This produced a coordination problem in reverse: the rule that initially created credibility later made alternatives increasingly disruptive.
The regime ended after sovereign default in December 2001 and abandonment of convertibility in early January 2002. Law 25.561 subsequently repealed key convertibility provisions.
Transfer limits
Argentina demonstrates that a hard nominal anchor can rapidly reduce inflation when confidence in discretionary money has collapsed. It also demonstrates that initial price stability does not guarantee long-run consistency among the exchange-rate rule, fiscal policy, debt structure, external competitiveness and financial balance sheets.
The case does not imply that fixed exchange rates are inherently unsustainable, or that the Argentine crisis can be attributed to one variable. The IEO itself emphasizes the interaction of fiscal weakness, debt, the peg, external shocks, political capacity and crisis management.
Compared with the other cases in the Atlas, Argentina made the nominal commitment harder and more legalistic. Israel synchronized several anchors but later adapted the exchange-rate regime. Bolivia attacked the fiscal-monetary financing loop. Brazil used a temporary unit of account before moving to a new currency and later changed its exchange-rate regime. The key comparative question is not which country had the “best” plan, but which adjustment margins each architecture preserved or removed.
Sources
- República Argentina, Ley 23.928 — Convertibilidad del Austral, texto original: https://www.argentina.gob.ar/normativa/nacional/norma-328/texto
- Banco Central de la República Argentina, Emisiones anteriores — Peso y Ley de Convertibilidad: https://www.bcra.gob.ar/billetes-y-monedas-emisiones-anteriores/
- IMF Independent Evaluation Office, The IMF and Argentina, 1991–2001: https://www.imf.org/External/NP/ieo/2004/arg/eng/
- IMF IEO, Issues Paper / statistical table for Argentina, 1991–2002: https://www.imf.org/external/np/ieo/2003/arg/index.htm
- IMF, Experimental Report on Transparency Practices: Argentina: https://www.imf.org/external/np/rosc/arg/index.htm