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LTCM 1998

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LTCM 1998

Long-Term Capital Management was, by most conventional measures, the most sophisticated hedge fund ever assembled. Its partners included two Nobel Prize winners—Robert Merton and Myron Scholes, co-creators of the Black-Scholes options pricing model—along with former Federal Reserve Vice Chairman David Mullins and a team of PhDs who had built some of Wall Street's most profitable proprietary trading operations. LTCM's strategy was intellectually elegant, its risk models were more rigorous than those of most major banks, and for its first four years it produced extraordinary returns.

In the summer and autumn of 1998, it nearly destroyed the global financial system.

The strategy and the leverage​

LTCM's core approach was convergence arbitrage: identifying pairs of securities that were theoretically equivalent—or should converge toward equivalence over time—and taking opposite positions in each, betting that the spread between them would narrow. The positions were individually low-risk and low-return, but by applying enormous leverage—at peak, LTCM had roughly $125 billion in assets against $4.7 billion in equity, a leverage ratio of about 25:1, with notional positions exceeding $1 trillion—the fund amplified those small spreads into large returns.

Russia and the correlation breakdown​

In August 1998, Russia defaulted on its domestic ruble-denominated debt and devalued the ruble. The event itself was not LTCM's primary problem—its direct exposure to Russia was limited. The problem was the behavior of global capital markets in the aftermath. In a genuine financial panic, correlations across asset classes break down: assets that normally trade independently begin moving together, and the mathematical models that depend on historical correlation relationships become worthless. Every spread position LTCM held, in every market, moved against the fund simultaneously.

Within weeks, LTCM had lost 90 percent of its equity. The fund's positions were so large that it could not liquidate without driving markets further against itself. The Federal Reserve Bank of New York, concerned that an uncontrolled LTCM collapse could trigger a systemic cascade, convened a meeting of 14 major Wall Street banks and orchestrated a $3.6 billion private sector rescue.

The lessons LTCM taught​

LTCM's failure demonstrated that correlation-based risk models work only in normal markets—and normal markets are not the ones that destroy wealth. It established the concept of too-big-to-fail in hedge fund context, sparked a debate about moral hazard that would resurface repeatedly in future crises, and revealed how deeply interconnected the balance sheets of major financial institutions had become through derivatives exposure.

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