LTCM Collapse (1998)
The collapse of Long-Term Capital Management (LTCM) in 1998 was a near-systemic financial crisis in which a hedge fund managed by Nobel Prize-winning economists imploded after taking on enormous leveraged positions that unraveled when global markets moved in ways their models had assigned near-zero probability.
Long-Term Capital Management was founded in 1994 by John Meriwether, a former Salomon Brothers bond trader, along with several partners including Myron Scholes and Robert Merton — who in 1997 won the Nobel Prize in Economics for their work on options pricing. The fund's strategy relied on identifying small pricing discrepancies between related financial instruments and exploiting them with enormous leverage. In its early years, LTCM generated spectacular returns, attracting capital from major financial institutions worldwide.
By 1998, LTCM had approximately $125 billion in assets but equity of only $4.7 billion — a leverage ratio of roughly 25 to 1. Through off-balance-sheet derivatives, the fund's total notional exposure was estimated at over $1 trillion. The fund's models, built on decades of historical data, indicated that its positions carried very low probability of large simultaneous losses.
The models proved catastrophically wrong. Russia's default on its domestic government debt in August 1998, combined with the ongoing fallout from the Asian Financial Crisis, triggered a global flight to quality unlike anything captured in the models' historical datasets. Spreads between instruments that LTCM had bet would converge instead widened dramatically. Because the fund was on the same side of many trades, its attempts to reduce positions worsened the very dislocations it was trying to exit.
By September 1998, LTCM had lost $4.6 billion — nearly its entire equity — in less than five months. The Federal Reserve Bank of New York, concerned that a disorderly liquidation of LTCM's trillion-dollar book would destabilize global markets, orchestrated a private sector bailout in which 14 major financial institutions contributed $3.6 billion to recapitalize the fund and manage its unwind in an orderly fashion.
The LTCM episode became a canonical illustration of model risk — the danger of relying on mathematical models that assign very low probabilities to events that, in the real world, occur with uncomfortable regularity. It also demonstrated how leverage could transform a manageable loss into a systemic threat, foreshadowing the dynamics of the 2008 financial crisis a decade later.