In the late 1970s, brothers Nelson Bunker Hunt and William Herbert Hunt, heirs to a Texas oil fortune, began accumulating silver on a scale the market had never seen. By early 1980 the Hunts and their partners were estimated to control roughly two-thirds of all deliverable silver in private hands, much of it purchased using borrowed money and futures contracts rather than outright cash. What followed became one of the clearest historical illustrations of how concentrated, leveraged positions can unwind violently when market structure shifts against them.
The run and the reversal
Silver traded near 6 dollars an ounce in early 1979. As the Hunts and allied buyers absorbed supply, the price climbed relentlessly, reaching an intraday peak near 50 dollars an ounce in January 1980 — an increase of roughly 700 percent in about a year. The move drew comparisons to a classic short squeeze, except here the buying pressure came from a small number of related parties rather than broad market demand. Exchanges including COMEX grew concerned about systemic exposure and began raising margin requirements sharply while also imposing new rules, notably "Silver Rule 7," which restricted new positions to liquidation only. This combination of higher collateral demands and restricted trading room removed the mechanism that had allowed the position to keep growing.
What happened on March 27 1980
On March 27, 1980 — later nicknamed Silver Thursday — the price of silver collapsed by roughly 50 percent in a single trading session, falling from about 21 dollars to near 10.80 dollars an ounce. The Hunts, unable to meet an estimated 100 million dollars in margin calls, faced the prospect of default. Because their position was financed through more than twenty banks and brokerage firms, regulators and lenders worried that a disorderly unwind could ripple through the financial system. A consortium of banks ultimately arranged a 1.1 billion dollar credit line collateralized by Hunt family oil and business assets, allowing the position to be unwound over time rather than liquidated immediately.
Why leverage amplified the outcome
The Hunts' strategy rested on borrowed capital and futures contracts, both of which allowed control over far more silver than their cash resources alone would have permitted. This amplified gains on the way up but converted a price decline into a solvency crisis on the way down. A 50 percent drop in the underlying asset translated into losses that exceeded the equity backing the position many times over. This is the same mechanical relationship that governs any leveraged exposure: the multiplier that accelerates paper gains during a favorable move works identically, and just as fast, in reverse. Historical episodes involving leveraged commodity or currency positions — from 1980 silver to later currency and derivatives blowups — repeatedly show this asymmetry playing out on compressed timelines, often within days rather than months.
Concentration risk beyond commodities
A second lesson sits alongside leverage: concentration. Because a small number of related accounts controlled such a large share of a single market, ordinary price discovery broke down. Prices no longer reflected diffuse supply and demand but the buying capacity of one coordinated group. When the exchange changed the rules governing that group's ability to add positions, the imbalance had nowhere to go but into a rapid correction. This dynamic is not unique to commodities; concentrated ownership in a single stock, sector, or strategy can similarly distort apparent stability until a change in market rules, liquidity, or sentiment forces a rapid repricing.
The regulatory aftermath
The episode led to lasting changes in how exchanges monitor position size and margin. Position limits — caps on how large a single trader's futures exposure can become — were tightened across commodity markets in the years that followed, and margin requirements began to be adjusted more dynamically in response to volatility rather than left static. The Commodity Futures Trading Commission, established only a few years earlier in 1974, used the episode to justify closer surveillance of large positions across related accounts, a practice that continues in modern market oversight. In this sense, Silver Thursday functioned as a stress test for young regulatory infrastructure, exposing gaps that were subsequently addressed.
Reading the episode today
For a long-horizon investor, the silver episode is less a story about a metal and more a case study in how borrowed money and concentrated bets interact with market structure. The price appreciation from 1979 into early 1980 might look, in isolation, like evidence of strong momentum. The collapse that followed shows why momentum built on leverage and narrow ownership has historically been fragile in ways that broadly distributed, unleveraged exposure is not. Diversification across assets and the avoidance of outsized borrowed positions do not eliminate volatility, but they remove the specific mechanical trigger — the margin call — that turned a price decline into a forced, rapid liquidation in 1980.
The rule to internalise
Concentrated, leveraged positions do not simply carry more risk in a linear sense; they change the character of that risk, converting ordinary price volatility into a potential solvency event governed by margin rules and lender patience rather than by the underlying asset's fundamentals. Silver Thursday remains a durable reminder that the speed of a leveraged unwind can outpace the speed of the run that preceded it.
Educational content only. Not investment advice.