Asian financial crisis causes: currency pegs, short-term debt and contagion

Which Asian financial crisis causes mattered most in 1997?

Federal Reserve History lists four conditions: currency pegs that masked risk, heavy and often short-term foreign borrowing, rapid domestic credit growth with weak supervision, and rising current account deficits and external debt. When the pegs failed, firms saw their debt burdens jump. Wikipedia adds hot money inflows and weak corporate governance to the list.

The order matters. Pegs and cheap dollar loans came first and built exposure quietly over years. Deficits and credit growth added to it. The devaluation of 2 July 1997 was the trigger, not the cause, and the stock market crash that followed measured the exposure that had accumulated. Separating cause from trigger keeps a reader focused on the slow variables.

How did currency pegs help cause the Asian financial crisis?

A peg promises a fixed price for a currency. The baht was pegged at 25 to the US dollar, and Wikipedia notes that fixed exchange rates encouraged external borrowing and excessive foreign exchange risk. A borrower who sees a stable rate stops pricing in a fall. The risk looks small until the day the peg moves.

Defending a peg costs foreign reserves. Thailand ran out of reserves and let the baht go on 2 July 1997. Hong Kong faced attacks on its peg in the same crisis and kept it, with overnight interest rates raised from 8% to 23% on 23 October 1997. Both cases show that a peg holds only while reserves and policy resolve last.

Why did short-term foreign debt turn a currency fall into a crash?

Federal Reserve History describes heavy foreign borrowing, often short-term, that exposed firms and banks. Short debt must be renewed often, so lenders can stop at any moment. Foreign debt compared with GDP in four large ASEAN economies rose from 100% to 167% between 1993 and 1996, then passed 180% at the worst of the crisis (Wikipedia).

South Korea shows the mechanism in its clearest form. It reached the brink of default, and on 24 December 1997 a meeting hosted by the New York Fed led US banks to roll over short-term loans. Restructuring into medium-term loans was completed in April 1998. A reader can measure this risk by comparing short-term foreign debt with foreign reserves.

How did fast credit growth and weak supervision add to the crisis?

Rapid domestic credit growth built leverage and doubtful loans, and weak supervision let both grow (Federal Reserve History). Wikipedia also points to weak corporate governance and, in Malaysia and Indonesia, crony capitalism. Credit that funds low-return projects creates loans that cannot be repaid when conditions change.

When a currency falls, the burden of foreign-currency debt in local terms jumps. Firms whose revenue is in local currency then face insolvency, and banks that lent to them face losses. The bank problem and the currency problem feed each other, which explains why Thailand faced a balance-of-payments problem and a banking crisis together.

What role did current account deficits play in the Asian financial crisis?

A current account deficit means a country buys more abroad than it earns, and it fills the gap with foreign money. Wikipedia records large private current account deficits in Thailand, Indonesia, and South Korea before the crisis. The gap depends on investors continuing to lend.

Hot money made the gap easy to fill. Short-term capital flows chase quick profit and leave as quickly. In the years before 1997 growth in the most affected economies exceeded 5% and often approached 10%, which kept the money coming. When growth and confidence turned, the inflow reversed, and the stock market crash followed the reversal.

How did contagion spread the 1997 crash between countries?

Contagion moved the crisis between countries with similar weak points. After Thailand, pressure reached Malaysia, the Philippines, Indonesia, and South Korea (Federal Reserve History). Investors who sold one currency sold the others that looked alike. The Hang Seng fall of 23% between 20 and 23 October 1997 shows how quickly a regional mood travelled.

In 1998 spillovers reached Latin America and Eastern Europe, including Brazil and Russia. Contagion needs two things: a shock and a shared vulnerability. Markets with lower debt and larger reserves had more room to respond. Mapping the shared weak points of a region therefore tells you where the next shock would travel first.

How can you test an Asian market for these causes today?

Run 6 checks each quarter: the exchange rate regime, foreign reserves compared with short-term foreign debt, foreign debt compared with GDP, credit growth compared with income growth, the current account balance, and the share of foreign holders in the stock market. Record each number with its date. As of October 2026 all 6 come from public statistics.

A structural score can combine these readings. The EQOS Asia method page explains how, the Λ simulator tests a case of your own, and a 30-minute pre-diagnostic applies the scoring to your exposure. Before any decision, read the full record of the crash that began in Thailand.

Frequently asked questions

About the author

Stéphane Jambu

President, EQOS Forecast Asia

Stéphane Jambu leads EQOS Forecast Asia and works as a consultant in e-commerce, search visibility, and AI. LinkedIn profile