Which 1998 Russian debt default and currency collapse helped trigger the failure of Long-Term Capital Management?

The Russian financial crisis was the 1998 debt default and currency collapse that helped trigger the failure of Long-Term Capital Management.

Russia had accumulated substantial short-term debt while government finances were strained by weak tax collection, falling commodity prices, and the broader effects of the Asian financial crisis. On August 17, 1998, the government devalued the ruble, declared a moratorium on some foreign debt payments, and restructured domestic debt.

The sudden default disrupted global financial markets. Investors sought safer assets, spreads widened, and previously related prices moved in unexpected directions. Long-Term Capital Management, a highly leveraged hedge fund with large positions in bonds and derivatives, suffered severe losses as its trading assumptions broke down.

The Federal Reserve Bank of New York helped organize a private-sector rescue in September 1998, rather than using public funds to bail out the fund directly. The Russian crisis was not itself a worldwide stock-market crash on the scale of 1929, but it was a major international shock whose effects exposed the dangers of leverage and interconnected markets.