The Chicago Board of Trade and the Birth of Futures, 1848–1865

On Monday 3 April 1848, eighty-two merchants climbed to a room above a flour store at 101 South Water Street and adopted a constitution. Out the window was the Chicago River, where lake schooners took on grain that had arrived by farm wagon over prairie roads. The objects they wrote down were modest and entirely respectable: "To maintain a Commercial Exchange; to promote uniformity in the customs and usages of merchants; to inculcate the principles of justice and equity in trade; to facilitate the speedy adjustment of business disputes; to acquire and to disseminate valuable and economic information; and generally to secure to its members the benefit of cooperation in the furtherance of their legitimate pursuits."

Nothing in that sentence anticipates a derivative. It reads like the founding charter of a chamber of commerce, which is close to what the Board of Trade was for its first decade. Within seventeen years the same body had assembled the standardised, margined, rule-enforced futures contract — the instrument every later exchange copied, and the reason a farmer in Iowa and a miller in Liverpool could agree a price for wheat that neither of them yet owned.

Fourteen Weeks in 1848

Chicago acquired three pieces of machinery in the first months of 1848, and the Board of Trade was the least impressive of them at the time.

A telegraph line opened on 11 January, built by the Erie and Michigan Telegraph Company, which within a year had put Chicago in direct contact with Buffalo. Prices in New York stopped being a week old. On 10 April, seven days after the merchants signed their constitution, the Illinois and Michigan Canal opened when the boat General Fry, towed by the propeller A. Rossiter, came up from Lockport. The canal joined the Mississippi watershed to the Great Lakes, and grain that had floated south to New Orleans began moving east instead.

Wire, water and a merchants' club, all inside fourteen weeks. Each one alone would have mattered little. Together they made Chicago the place where the American interior's crop was priced, and created a problem the club spent the next two decades solving.

Grain in Sacks

To understand the invention, start with what a bushel of wheat was in 1840. It was a specific bushel, belonging to a specific farmer, in a specific sack, and it stayed that way from the wagon to the schooner's hold. A buyer inspected the sack and bought that grain. Identity was preserved because there was no alternative to preserving it — no one had worked out how to mix one man's wheat with another's and still know who owned what.

Sacks made the trade physical and slow. Chicago's first grain storage was built in 1838, when George W. Dole and Walter Newberry put up a warehouse on Rush Street that loaded grain onto lake boats by gravity. That year Chicago shipped seventy-eight bushels of wheat, the first to leave the settlement at the river mouth by lake. Three years later shipments had reached forty thousand bushels. By the autumn of 1847 roughly 1,974,304 bushels of grain were coming down to the Chicago wharves.

Sacks could not move two million bushels. In 1848 R. C. Bristol built the first Chicago elevator driven by steam, and the machinery changed the commercial logic as much as the labour. A steam elevator lifts grain in a continuous stream by bucket belt and drops it into bins. To use it economically you must pour many farmers' wheat into the same bin, and the moment you do, the individual lot is gone. What the depositor holds instead is a claim: a paper receipt for so many bushels of a stated quality.

That paper is where futures trading begins. William Cronon's account of the transformation puts the emphasis exactly there — grain ceased to be an object and became a quantity, and the elevator receipt, not the wheat, was what changed hands (Cronon, 1991).

Three Grades of Wheat

A receipt is only as good as the grading behind it. If a bin holds wheat of mixed quality, the receipt promises nothing precise, and depositors have every reason to dump their worst grain into the common pile. The Board of Trade solved this in 1856 by designating three quality categories of wheat and publishing the criteria for assigning grain to each. Wheat was graded before storage and binned only with grain of the same grade, and the depositor received a receipt for a specified quantity of a specified grade.

Grading is the least glamorous and most consequential act in the whole history. It made one bushel of Number 2 Spring Wheat legally and commercially identical to any other bushel of Number 2 Spring Wheat anywhere in Chicago. Fungibility is a precondition for a futures market, because a contract that promises delivery of grain in June cannot specify which grain without destroying its own liquidity. Jeffrey Williams, working through the mechanics of how these markets actually formed, treats standardised grades and the warehouse receipt as the binding constraint rather than the contract language (Williams, 1982).

The Board still had no legal authority to make its grades stick. It acquired that on 18 February 1859, when the governor of Illinois signed an act granting the Board a corporate charter. The charter gave it self-regulatory power over its members, recognised its standardised grades, and provided for Board-appointed grain inspectors whose findings bound members. For decades the Commodity Futures Trading Commission's own annual reports dated the beginning of futures trading in Chicago wheat, corn and oats to that charter rather than to 1848.

To Arrive

Forward dealing had started long before the legal apparatus caught up. The earliest known time contract on the Board dates from 13 March 1851: three thousand bushels of corn for delivery in June, at a price one cent below the cash price on the day the contract was written.

That single document contains the whole idea and none of the machinery. It is a private bargain between two named parties, on terms they negotiated, enforceable only by suing. If corn rose sharply before June, the seller's incentive to walk away was limited by nothing but his reputation. Such "to arrive" deals multiplied through the 1850s, and so did defaults. In 1858 the Board began writing standardised terms for them, which cut the negotiation down to price and month.

These figures are not one uniformly defined statistic, and the chart should be read for magnitude rather than precision: the 1838 and 1841 numbers are wheat shipped out by lake, the 1847 figure is grain arriving at the wharves, and 1854 and 1857 are annual receipts of flour and grain — 15,725,135 bushels and 21,659,109 bushels respectively. By 1861 Chicago's grain trade was running at roughly fifty million bushels a year. Whatever the definitional untidiness, the growth is what forced the institutional changes. A club settling disputes by handshake cannot clear fifty million bushels.

13 October 1865

The rules adopted on 13 October 1865 are the moment the futures contract becomes recognisable. They governed margin and delivery: a trader taking a position had to post a performance bond, and the procedure for making and taking delivery was written down and enforced by the Board rather than left to the courts.

Margin is the part that matters most, and it is easy to underrate because it sounds like administration. A forward contract between two merchants is a promise whose value depends on the promisor's solvency. Requiring both sides to deposit money with a third party, and to top it up as prices move, converts the promise into something close to a cash-settled obligation. The identity of the counterparty stops being the thing you are analysing. Once that is true, a contract can be resold to a stranger, and once it can be resold, it is a traded instrument rather than a bilateral agreement. Thomas Hieronymus, whose study of futures trading remains the standard technical account, treated the combination of grade standards and margined performance as the point at which grain contracts became financial contracts (Hieronymus, 1971).

Speculation arrived immediately and in volume, along with corners. Cornering a market in a commodity with a fixed local supply was straightforward in the 1860s: buy the deliverable stock in Chicago elevators, buy contracts from sellers who do not own any, and name your price when the month ends. The Board adopted a rule banning corners on 13 October 1868, three years to the day after the General Rules, which tells you how quickly the problem had become intolerable. The rule was close to unenforceable. Manipulation of this kind survived Chicago's rules by more than a century, reappearing in the Hunt brothers' attempt to corner the world silver market in 1980 and in the London Metal Exchange's decision to cancel twelve billion dollars of nickel trades in March 2022.

The Elevator Men

Self-regulation had a defect the Board never acknowledged: the grain inspectors answered to an organisation whose members included the men who owned the elevators. Jonathan Lurie's history of the Board's first half-century as a self-governing body reads as a long account of that conflict failing to resolve itself (Lurie, 1979).

Ira Y. Munn is the case in point. Senior partner of Munn & Scott, elevator proprietors, he served as president of the Board of Trade in 1860 and president of the Chamber of Commerce in 1868. His firm operated four elevators with a combined capacity of 2,700,000 bushels, able to take in 300,000 bushels a day and ship out twice that. He was, in other words, simultaneously a regulator of the grain trade and one of the largest private beneficiaries of how it was regulated. On 3 December 1872 Munn and Scott were expelled from the Board of Trade for fraudulent dealing — issuing receipts against grain that was not in their bins.

Illinois had already stopped waiting. Article XIII of the state constitution adopted in 1870 declared, in language that left no room for negotiation, that "all elevators or storehouses where grain or other property is stored for a compensation, whether the property stored be kept separate or not, are declared to be public warehouses." In April 1871 the legislature passed an act to regulate those warehouses, fix maximum storage charges, and put grain inspection under state authority — three cents a bushel for the first thirty days, a cent for each additional ten.

Munn sued, and lost. The Supreme Court decided Munn v. Illinois on 1 March 1877, with Chief Justice Morrison Waite writing that property "becomes clothed with a public interest when used in a manner to make it of public consequence, and affect the community at large." An exchange's private rulebook had been held insufficient, and the principle that a market's infrastructure can be regulated because it is infrastructure entered American law through a dispute about grain bins on the Chicago River.

What Chicago Exported

The template assembled between 1848 and 1865 — a standardised contract, a defined deliverable grade, posted margin, an exchange rulebook, and a clearing arrangement that eventually replaced the counterparty entirely — turned out to be indifferent to what it was applied to. Chicago spent the next century proving it. Pork bellies and soybean oil came first, and then the abstractions: currency contracts when the International Monetary Market opened in 1972 and traded money the way its parent exchange traded corn, and listed options when the Chicago Board Options Exchange opened in 1973 alongside the Black-Scholes formula. The Board of Trade's own clearing corporation, which finally interposed itself between every buyer and seller, did not arrive until 1925 — sixty years after the rules that made it necessary.

The nineteenth-century mechanism also exported its failure modes. A margined contract transfers price risk cheaply, which is a genuine service to a farmer who wants a price in March for a crop he will cut in August, and it also lets a firm accumulate an exposure far larger than its capital. That arithmetic produced the losses at Metallgesellschaft, where an oil hedging programme built on futures cost 1.3 billion dollars in 1993 and 1994 not because the hedge was wrong about prices but because the margin calls came due before the hedge paid off. Nothing about that failure would have puzzled the men who wrote the 1865 rules; they had watched traders ruined by margin within months of imposing it.

The Board's first meetings were so poorly attended that it began serving a free lunch of crackers, cheese and ale to get members into the room, and even that did not reliably work. By 1856 it had grown to about 150 members. The institution that could not fill a room above a flour store had, by the time its charter was eight years old, built the machine that priced the American harvest — and the reason was never the trading floor. It was the grading rule, the receipt, and the deposit: three pieces of paperwork that made a bushel of wheat into a number, and a promise into an asset.

Number 2 Spring Wheat is still a grade, still delivered against a contract, still the thing a price refers to when nobody involved has seen the grain.