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Hedge Funds

Long-Term Capital Management

A hedge fund run by Nobel laureates earned spectacular returns on enormous leverage — until the 1998 Russian default broke its models, cost it about $4.6 billion, and forced a Federal Reserve-organized bank rescue.

Company shutdown Shut down Moderate
Company
Long-Term Capital Management
Started
1994
Ended
2000
Losses in mid-1998
~$4.6 billion
Estimated loss
Estimated: $4,600,000,000 [5]
Collapse speed
Rapid
Preventability
High
Lesson transfer
Universal
Last reviewed
2026-07-23

Narrative

The story

The ambition

Long-Term Capital Management set out to turn financial theory into money. Founded in 1994 by a star Salomon Brothers trader and staffed with Nobel laureates, it used sophisticated models to find tiny pricing discrepancies between related securities and, with heavy leverage, turn those slivers into large returns.

The rise

It worked, at first, spectacularly — roughly 20% to 40% a year in its early years — and the fund became one of the most admired and imitated on Wall Street.

The cracks

The returns depended on enormous leverage. By 1998 the fund held around $125 billion in assets on about $5 billion of equity, with derivative positions in the trillions. Its risk models, built on relatively short data histories, treated a severe, correlated shock as all but impossible.

The collapse

That shock came. When Russia defaulted in August 1998, investors fled to safety, and the spreads LTCM had bet would converge blew apart instead. The fund lost about 44% of its capital in August alone and roughly $4.6 billion overall. In September the Federal Reserve Bank of New York organized a consortium of 14 banks to inject about $3.6 billion and wind it down without a fire sale.

The aftermath

The fund was liquidated by 2000. No public money was lent, but the episode became the defining lesson in how leverage and model overconfidence can turn brilliance into fragility — and a rare case of "too interconnected to fail."

The lessons

Being right on average is not enough when leverage removes the room to be wrong. Models built on quiet years underprice the violent ones, and correlations everyone assumed were independent snap together in a crisis — so the margin of safety, not the cleverness of the trade, decides survival.

Causal timeline

Failure Anatomy

  1. 1996

    Nobel laureates and spectacular returns

    LTCM, founded in 1994 by John Meriwether with Nobel laureates Myron Scholes and Robert Merton, earned roughly 20-40% a year using leveraged arbitrage. [1]

  2. 1998

    Leverage and blind spots

    By 1998 the fund was leveraged over 25-to-1 with ~$1 trillion in derivatives notional, on models that underestimated tail risk. [2] [3]

    Debt burdenInformation failure
  3. 1998-08

    Russia defaults

    Russia's August 1998 default sparked a flight to liquidity; LTCM lost ~44% of its capital in August and about $4.6 billion overall. [4] [5]

    External shock
  4. 1998-09

    A Fed-organized rescue

    In September 1998 the New York Fed organized a ~$3.6 billion investment by 14 banks to wind the fund down without a fire sale; the Fed lent none of its own money. [6]

Structured analysis

What Went Wrong

Root causes

Extreme leverage. The fund was leveraged over 25-to-1 — roughly $125 billion of assets on about $5 billion of equity, plus around $1 trillion in derivatives notional — leaving no cushion for a large loss. [2]

Models blind to tail risk. LTCM's risk models, built on relatively short data histories, underestimated the severe, correlated moves that actually occurred. [3]

Contributing factors

The 1998 Russian default. Russia's August 1998 default triggered a market-wide flight to liquidity that moved sharply against LTCM's positions. [4]

Immediate trigger

Flight to liquidity breaks the trades. The post-default flight to liquidity blew apart the spreads LTCM had bet would converge, costing ~44% of its capital in August 1998. [4]

Visible symptoms

Capital evaporating. The fund lost about 44% of its capital in August 1998 and roughly $4.6 billion in a few months. [4] [5]

Warning signs

Leverage above 25-to-1. The fund's extreme leverage meant even a modest adverse move could wipe out its equity. [2]

Affected groups

InvestorsPartners

Evidence

Claims & sources

Every numbered marker in the analysis links to the claim it rests on, and each claim to its sources.

  1. [1]

    LTCM, founded in 1994 by John Meriwether with principals including Nobel laureates Myron Scholes and Robert Merton, earned strong returns of roughly 20% to 40% a year in its first years.

    High Fact Long-Term Capital Management — Wikipedia Was the Sacrifice of Lehman Worth It? (LTCM analysis)
  2. [2]

    By 1998 the fund was extremely leveraged — roughly $125 billion in assets on about $5 billion of equity (over 25-to-1), plus derivatives with a notional value around $1 trillion.

    High Fact Long-Term Capital Management — Wikipedia Was the Sacrifice of Lehman Worth It? (LTCM analysis) Hedge Funds, Leverage, and the Lessons of Long-Term Capital Management Too Big to Fail? Long-Term Capital Management and the Federal Reserve
  3. [3]

    LTCM's risk models, built on relatively short data histories, underestimated the severe, correlated market moves that materialized.

    Moderate Reported explanation Long-Term Capital Management — Wikipedia Was the Sacrifice of Lehman Worth It? (LTCM analysis) Hedge Funds, Leverage, and the Lessons of Long-Term Capital Management
  4. [4]

    The August 1998 Russian debt default triggered a market-wide flight to liquidity that moved against LTCM's positions, and the fund lost about 44% of its capital in August alone (its capital falling from about $4.1 billion to $2.3 billion).

    High Fact Long-Term Capital Management — Wikipedia Was the Sacrifice of Lehman Worth It? (LTCM analysis) Hedge Funds, Leverage, and the Lessons of Long-Term Capital Management
  5. [5]

    LTCM lost roughly $4.6 billion over a few months in 1998 — more than half its capital, which fell to about $2.3 billion by the end of August.

    Moderate Fact Long-Term Capital Management — Wikipedia Hedge Funds, Leverage, and the Lessons of Long-Term Capital Management Too Big to Fail? Long-Term Capital Management and the Federal Reserve
  6. [6]

    In September 1998 the Federal Reserve Bank of New York organized a rescue in which a consortium of 14 banks invested about $3.6 billion to wind the fund down in an orderly way, with the Fed lending none of its own money.

    High Fact Long-Term Capital Management — Wikipedia Was the Sacrifice of Lehman Worth It? (LTCM analysis) Hedge Funds, Leverage, and the Lessons of Long-Term Capital Management Too Big to Fail? Long-Term Capital Management and the Federal Reserve Testimony on the private-sector refinancing of Long-Term Capital Management

Sources