Contagion

What Is Contagion?

In finance, contagion refers to the way a crisis in one market or country can spread to others, sometimes reaching economies that appear only loosely connected to the original trouble. It can travel through direct channels, such as trade and cross-border lending, but also through investor psychology, as fear in one place prompts investors to pull money out of similar markets everywhere. The 1997 Asian financial crisis is a textbook case: it began with the collapse of Thailand's currency, the baht, in July 1997 and quickly spread to Indonesia, South Korea, and beyond, even to seemingly unconnected economies.

Why It Matters

Contagion matters because it turns a local shock into a regional or global crisis, often outpacing the ability of policymakers to respond. In 1997-98, the Asian crisis contributed to Russia's 1998 debt default and Brazil's 1999 currency crisis, and volatility from these events helped topple the U.S. hedge fund Long-Term Capital Management. The mechanism reappears throughout history, from the global reach of Black Monday in 1987 to the worldwide sell-off of the 2020 COVID-19 crash. Understanding contagion explains why crises are studied as interconnected events and why international bodies like the IMF coordinate responses meant to contain a panic before it spreads.

Test Your Knowledge

Questions on this topic from the EconRecall fact bank:

• Japan's economy, already dealing with the aftermath of its own 1990s asset bubble collapse, was also affected by what during the 1997-98 crisis?
  Regional economic contagion from the broader Asian crisis
• The Asian Financial Crisis is often cited as contributing to contagion in two other emerging-market crises that followed shortly after. Which two?
  Russia's 1998 debt default and Brazil's 1999 currency crisis
• The Asian Financial Crisis is frequently studied in economics courses as a case study in currency crises, along with which related concept describing how the crisis spread from Thailand to seemingly unconnected economies?
  Contagion