The History of Market Manipulation: Corners, Squeezes, and Bubbles

On March 27, 1980, the silver market collapsed. The Hunt brothers — Nelson Bunker Hunt and William Herbert Hunt, sons of the Texas oil billionaire H.L. Hunt — had spent the better part of two years accumulating silver futures and physical silver with the explicit goal of cornering the global market. At the peak of their campaign, in January 1980, they held contracts and physical positions representing roughly a third of the world’s entire annual silver production. The price of silver had risen from under $6 per troy ounce in early 1979 to $49.45 on January 18, 1980 — an eight-fold increase in under a year. Then the commodity exchanges changed their rules, restricting new silver purchases. The price fell. The Hunts faced margin calls they could not meet. By March 27, silver had fallen to $10.80 and the brothers faced losses exceeding a billion dollars. They had attempted the largest commodity corner in modern history, and they had failed — but not before briefly threatening the solvency of several major brokerage firms and sending a shock through global financial markets.

The Hunt silver corner is the most dramatic episode in a long history of market manipulation that stretches from the earliest organized markets to the present day. Every generation produces its own version of the same story, and every generation is surprised by it. The surprise reflects a persistent intellectual error: the belief that markets are natural self-correcting mechanisms that tend toward efficiency unless external forces distort them. This is wrong in a specific and important way. Markets are human institutions, and human beings are relentlessly creative at finding ways to exploit whatever rules and structures those markets provide. Manipulation is not an aberration from normal market behavior. It is a permanent feature of markets wherever there is enough money at stake to make the effort worthwhile.

The Anatomy of a Corner

A market corner is the purest and most technically interesting form of market manipulation. Understanding it requires understanding how futures markets work.

In a futures market, buyers and sellers agree to exchange a commodity at a specified future date at a price agreed upon today. This is useful for both sides: a wheat farmer can lock in today’s price for next fall’s harvest, reducing his exposure to price uncertainty. A bread manufacturer can lock in the price of next fall’s wheat purchase, eliminating uncertainty from his production planning. The market provides a price discovery function and a risk transfer function simultaneously.

A corner exploits the mechanics of the futures market’s delivery requirement. When a futures contract comes to expiration, the party that is short the contract — who has promised to deliver the commodity — must either deliver physical commodity or buy back the contract in the market. A corner works by accumulating long futures positions AND physical commodity simultaneously, such that when contracts come to expiration, the shorts have nowhere to source the physical commodity except from the cornerer. The cornerer controls both the futures market and the physical supply. The shorts must buy from the cornerer at whatever price the cornerer demands. The cornerer can extract the entire desperate premium that short-sellers will pay to avoid defaulting on their delivery obligations.

This is why corners have been illegal in most markets for most of the twentieth century, and why regulators intervene when they see the pattern developing. The Hunt brothers pushed against these limits by accumulating their position across multiple exchanges, through offshore entities, and faster than regulators could respond. Their eventual defeat came not from regulation catching them mid-corner but from the exchanges retroactively changing the rules — limiting new long positions — which removed the mechanism through which they were planning to extract their profit.

The pattern appears again and again across market history because the structural logic of the corner is invariant. Wherever there is a futures market, a deliverable commodity, and the possibility of accumulating a dominant position, the corner will be attempted by someone with sufficient capital and appetite for risk.

Tulips, South Sea, and the Structure of Speculative Bubbles

Market manipulation in the corner sense requires substantial capital and technical market knowledge. Speculative bubbles are different: they are mass phenomena in which large populations of ordinary people collectively bid asset prices far above any defensible estimate of fundamental value.

The Dutch tulip mania of 1636-1637 is the canonical example, though its popular representation is significantly exaggerated. Tulip prices did rise dramatically — specific rare bulb varieties were traded at prices equivalent to multiple years of a skilled artisan’s wages — but the episode was largely confined to a small community of specialized traders rather than involving the general Dutch population. What the tulip mania did involve, clearly and importantly, was the emergence of a futures market in tulip bulbs in which contracts for bulbs that had not yet been grown were being bought and sold at rising prices. The bubble was as much a story about the invention of a new financial instrument — the forward contract on an agricultural commodity — as it was about irrationality.

The structure of every speculative bubble, from tulips to the South Sea Company to the dot-com boom to crypto assets, follows the same pattern. A new asset class or investment vehicle emerges. Early investors make genuine profits, which are visible and celebrated. The narrative of easy profits attracts new investors who are not primarily valuing the underlying asset but buying into the narrative of appreciation. Their buying drives prices higher, confirming the narrative, attracting still more investors. The self-reinforcing feedback loop continues until either the supply of new investors is exhausted, interest rates rise enough to make safer alternatives attractive, or some specific event punctures confidence in the narrative. Prices then fall faster than they rose, because the selling pressure of investors trying to exit is not offset by equivalent buying from fundamentals-based investors who had previously priced themselves out of the market.

The consistent presence of promoters and manipulators at the beginning of major bubbles is not coincidental. The South Sea Company’s extraordinary bubble in 1720 — which destroyed fortunes across England, including Isaac Newton’s — was driven by promoters who bribed members of Parliament, spread favorable information to the press, and structured share sales to create artificial appearance of investor demand. The company’s fundamental business — a purported monopoly on trade with South America that the Spanish Empire had no intention of actually permitting — was largely fictitious. The entire operation was a promotion, not a company. But the promotional machinery was sufficiently sophisticated to draw in the entire English investing public, including some of the most brilliant minds of the age.

This is the most durable finding from bubble history: extreme intelligence does not protect against speculative mania. Newton’s losses in the South Sea Bubble — reportedly £20,000, a very large sum — are frequently cited as evidence of this. But Newton’s error was not irrational. He had correctly identified the bubble’s promoters as promoters and sold out with a profit early. He then watched prices continue rising, concluded that the market knew something he didn’t, bought back in near the top, and was caught in the collapse. His error was not ignoring his judgment; it was abandoning it when the social pressure of watching others profit became psychologically overwhelming. This is not a failure of intelligence. It is a feature of human social cognition that intelligence does not override.

Wash Trading and the Mechanics of Artificial Volume

There is a third category of market manipulation, less dramatic than corners or bubbles but pervasive across every market era: the artificial creation of apparent market activity to mislead other participants.

Wash trading — buying and selling the same asset simultaneously between related parties, creating volume without genuine transfer of ownership or risk — has been documented in every era of organized markets. Its purpose is to signal to other traders that a market is active, liquid, and attracting genuine interest. In a liquid, active market, prices rise. Traders are attracted to volume as a signal of consensus information. Create artificial volume and you can attract genuine buyers who mistakenly interpret the fake activity as evidence of real demand.

The technique was rampant in the New York Stock Exchange in the 1920s, where pools of investors would trade shares back and forth between themselves to attract public attention, then sell their genuine holdings into the public buying they had stimulated. The Securities Exchange Act of 1934, which created the SEC and established the modern framework of securities regulation, was largely a response to Congressional investigations that documented the pervasiveness of wash trading and pool manipulation in the boom years of the 1920s.

Wash trading did not disappear with the 1934 Act. It migrated to less-regulated markets. In the early cryptocurrency markets of the 2010s and 2020s, academic researchers documented wash trading rates on some exchanges that exceeded ninety percent of reported volume. The same technique, the same purpose, the same structural logic — applied to a new asset class that had not yet attracted regulatory attention.

This is the key insight about market manipulation across historical eras: regulatory evolution and manipulation technique co-evolve. Every regulatory innovation closes specific loopholes and forces manipulators to develop new approaches. The techniques change. The underlying economic incentive — the extraction of wealth from less-informed market participants by those with superior information or market power — never does.

The Permanent Arms Race

The history of market manipulation does not support the conclusion that regulation is futile or that markets cannot function. The regulated financial markets of modern developed economies are vastly more reliable and less manipulated than the markets of a century ago. Price discovery in deep, liquid, regulated markets is genuinely better than in thin, opaque, unregulated ones. The improvements are real.

But they are improvements in degree rather than kind. As long as markets offer the possibility of large gains to those who can move prices, attract buyers, or exploit information advantages, manipulation will be attempted. The Hunt brothers had unlimited capital and spent years planning their silver corner. The South Sea promoters had access to the highest levels of government and spent years building their promotional machine. The cryptocurrency wash traders had new technology and regulatory arbitrage and spent no time at all replicating techniques documented in 1920s Congressional hearings.

The repeated appearance of market manipulation across five centuries of organized trading is not a story of human wickedness. It is a story about incentive structures. Wherever there is a gap between an asset’s apparent price and its fundamental value, someone will try to create or exploit that gap. Wherever there is a mechanism for extracting value from less-informed counterparties, someone will develop and deploy it. This is not a criticism of markets. It is a description of the permanent challenge of governing them. The market is a human institution, built by and for human beings in all their ingenuity, and a portion of that ingenuity will always be directed toward finding the weaknesses in whatever rules are meant to keep competition honest.

Understanding manipulation historically is useful precisely because the techniques are more durable than the specific episodes. A twenty-first century investor who has internalized the mechanics of the South Sea Bubble, the Hunt silver corner, and 1920s wash trading has a substantial practical advantage over one who has not.