Which U.S. financial firm collapsed in September 1998 after losses from the Russian crisis and helped prompt an LTCM rescue?

Long-Term Capital Management collapsed in September 1998 after losses from the Russian crisis and helped prompt a rescue.

Long-Term Capital Management, or LTCM, was a highly leveraged hedge fund founded in 1994. Its partners included prominent traders and Nobel Prize-winning economists, and it used mathematical models to pursue convergence trades—bets that related prices would move back toward historical relationships.

Russia’s August 1998 debt default and ruble devaluation triggered a flight from risky assets. Market relationships that LTCM’s models treated as relatively stable diverged dramatically, while many investors tried to sell similar positions at the same time. The fund faced losses and difficulty unwinding its enormous trades.

The Federal Reserve Bank of New York organized a private-sector recapitalization in September 1998, with major banks contributing funds. The government did not directly bail out LTCM, but officials feared an uncontrolled liquidation could destabilize already stressed markets. The episode became a classic warning about leverage, crowded trades, and model risk.