Tulip mania and what the story actually was

Tulip mania is the first thing anyone reaches for when they want to say that markets go mad. A flower bulb changed hands for the price of a canal house; the whole of Holland traded bulbs; when the price broke, merchants were ruined and threw themselves into the canals; the Dutch economy was devastated.

Most of that is false or unverifiable, and the parts that are true are true for reasons that have very little to do with the moral usually attached. The episode is still worth studying, but as a lesson in market structure rather than a lesson in crowd psychology. What happened in Holland in the winter of 1636 to 1637 was a forward market in an undeliverable good, with no clearing house, no margin, no way to inspect the underlying, and, as it turned out, no legal enforcement. That combination produces spectacular quoted prices and almost no economic damage, and understanding why is the point of this lesson.

What was actually being sold

A tulip is not a share. It is a bulb, and the biology drives everything.

Tulips reached western Europe from the Ottoman lands in the sixteenth century and were established in Dutch botanical collections by the 1590s. The varieties that commanded extraordinary prices were the "broken" tulips: white or yellow grounds streaked with flames and feathers of red or purple, sold under names like Semper Augustus, Viceroy and Admirael van der Eijck.

The streaking is a disease. It is caused by a virus carried between plants by aphids, which suppresses the base colour irregularly. This was not understood at the time and was only identified as viral in the twentieth century. The commercial consequences were severe and entirely non-obvious to a seventeenth-century buyer. A broken tulip cannot be reproduced true from seed: seed gives a plain flower, and it takes years to reach flowering size. The only reliable way to multiply a named broken variety is through offsets, the daughter bulbs a mother bulb produces around itself, and a bulb yields few of them per season. Worse, the virus that creates the pattern also weakens the plant, so the most desirable varieties propagated the most slowly.

So the supply of any named broken variety was fixed in the short run and expanded slowly and unpredictably over years. That is the classic setup for a squeezed market in any era, and it is why bulbs were sold not by the piece but by weight, in a tiny unit called the aas, with the price quoted per aas for the smaller offsets and per bulb for the large ones.

The plumbing: a forward market in goods that could not be delivered

Bulbs are lifted from the ground in June and replanted in autumn. Between roughly September and June, the asset is underground. It cannot be delivered, inspected or verified.

The trade nevertheless ran all winter. Buyers and sellers signed contracts for bulbs still in the soil, specifying variety and weight, with payment and delivery due at lifting in the summer. Contemporaries called it windhandel, wind trade, because nothing changed hands but paper and air.

The trading took place in what participants called colleges, meeting in taverns, with their own bidding rituals and their own charges. A buyer typically paid a small sum at the point of agreement, often called wine money, sometimes a fixed few percent, sometimes a token amount, with the entire balance due only on delivery months later.

Consider what that structure means for a buyer. Suppose a contract to take delivery of a bulb in June at 1,000 guilders, against a payment now of 3 guilders. For scale, a skilled Amsterdam craftsman earned on the order of 250 to 350 guilders in a year, so the contract price is several years of wages, while the cash actually paid is a few days of them. If the price rises to 1,500 by spring, the contract can be sold on for a 500-guilder gain on a 3-guilder outlay. If it falls, the buyer owes the full 1,000, but only if someone can make him pay.

There was no clearing house standing between the two parties, no daily variation margin, no collateral, and no exchange rule requiring performance. Each contract was a bilateral promise between two named individuals, often people who knew each other through the same church congregation or trade. Enforcement rested on the courts and, far more, on reputation.

What the prices did, and what can actually be documented

Prices for the fashionable varieties rose steeply through 1636 and vertically in January 1637. Common varieties, previously not really traded by weight at all, joined the market late, which is the familiar pattern of a boom broadening into the lowest-quality end of an asset class.

What deserves care is the provenance of the famous numbers. The often-quoted basket of goods said to have been paid for a Viceroy bulb, the wheat and rye and oxen and cheese and silver cup, comes from a satirical pamphlet published after the collapse, not from a notarial record. The same is true of most of the vivid anecdotes. Anne Goldgar's archival work on the actual notarial and court records found a much smaller and more specific market than the legend: a network numbering in the hundreds rather than the thousands, concentrated in Haarlem, Amsterdam, Alkmaar and Enkhuizen, made up largely of merchants, skilled artisans and a distinct cluster of Mennonite families, with connections to the flower trade and to each other.

Some prices are documented. An auction at Alkmaar in early February 1637, disposing of the bulb collection of a deceased grower for the benefit of his orphaned children, raised a sum on the order of 90,000 guilders on paper. That is a genuinely enormous figure for a single estate of flowers. It is also, revealingly, a figure that was substantially never collected, because the market broke within days and buyers refused to pay.

February 1637: what "collapse" means when contracts are voidable

The turn is usually dated to Haarlem in the first days of February 1637, when an auction found no bidders at the prevailing levels. Within weeks the entire forward market stopped functioning.

Note what did not happen. Nobody had borrowed from a bank against bulbs. There were no bulb loans on the books of the Amsterdam Wisselbank, which in any case was an exchange and deposit institution rather than a lender against speculative collateral. There was no margin to call, because there had been no margin. What existed was a large stock of unperformed forward contracts at prices nobody would now pay.

The dispute that followed was therefore legal, not financial. Growers wanted delivery and payment; buyers wanted release. Delegates of the trade meeting in Amsterdam in late February proposed that a buyer could annul a contract by paying a tenth of the agreed price. The Court of Holland declined to impose a general rule and pushed the disputes down to the towns, where they were settled slowly and locally, in Haarlem eventually on the basis that a buyer could void a contract for a few percent of its face value, a figure reported as 3.5 percent.

That settlement rate changes the economics retrospectively, and the point is worth stating precisely. A forward contract to buy at 1,000 guilders that can be walked away from for 35 guilders is not a forward at all. It is a call option with a strike of 1,000 and a premium of 35, plus the 3 guilders of wine money already paid, so a maximum loss of 38 guilders against unlimited upside. Once participants believed the obligation was unenforceable, the rational bid for such a contract is much higher than the rational bid for a binding one, and the economist Earl Thompson built an argument on exactly this: that some of the extraordinary late-stage quoted prices reflect the market's growing understanding that these were options, not purchases.

Whether that fully explains the level is contested. That it changes what the quoted prices mean is not.

Where the legend came from

The chain of transmission is short and traceable. Pamphlets published in 1637, including a series of moralising dialogues between two invented characters, satirised the trade for the entertainment and instruction of a Calvinist reading public that disapproved of getting rich without labour. Those pamphlets were mined by later Dutch writers, then by an eighteenth-century German compiler of the history of inventions, and finally by Charles Mackay, whose Extraordinary Popular Delusions and the Madness of Crowds of 1841 gave the story its permanent English form.

Mackay wrote entertainingly and sourced casually. Almost every modern retelling descends from him, which means almost every modern retelling descends from satire.

There is also a context the legend omits entirely. Bubonic plague was killing a large share of the population of Haarlem in exactly these years. That matters in two directions: it disrupted the market by killing participants mid-contract, and it makes the moral tale of idle speculators harder to sustain, since a good deal of the disputed estate business involved the bulbs of the dead.

Why the damage was small, and what that actually teaches

The Dutch Republic's golden age continued after 1637 without interruption. Amsterdam's trade, shipping and capital markets carried on. Goldgar found no wave of bankruptcies traceable to bulbs and no documented suicides.

The reason is structural, and it is the transferable lesson. A price bubble does macroeconomic damage in proportion to how much of the losses land inside the credit and payment system. Tulip contracts were bilateral promises among a few hundred people, funded almost entirely by future payment obligations rather than by borrowed cash. When the price fell, the loss was a transfer among those people, plus a large stock of contracts that were simply annulled. No depositor lost access to money, no bank stopped lending, no firm outside the flower trade lost its funding.

Compare that to an episode where the same asset is bought with borrowed money from institutions that themselves fund short. There, a price fall becomes a solvency problem for the lender, which becomes a funding problem for everyone who borrows from that lender, whatever business they are in. The magnitude of the price move tells you very little; the identity of the leveraged holder tells you almost everything.

What tulips genuinely demonstrate is narrower and still useful: that a market can produce absurd quoted prices when the good has inelastic short-run supply, when it cannot be inspected at the time of trade, when the contract requires no money up front, and when the obligation to perform turns out to be soft. Every one of those four conditions has reappeared in later markets. The flower is incidental.

What to take away

• The bulbs that commanded extraordinary prices were diseased: the flamed patterns came from a virus that also slowed propagation, so supply of any named variety was inelastic in the short run and expanded only slowly.
• The winter trade was a forward market in goods still in the ground, with a token payment at agreement, no clearing house, no margin and no daily settlement.
• Once contracts could be voided for a few percent of face value, the instrument was economically an option rather than a purchase, which changes how the late quoted prices should be read.
• Most of the famous anecdotes trace back through Mackay in 1841 to satirical pamphlets published in 1637, not to notarial or court records.
• The episode caused little macroeconomic damage because the losses stayed among a few hundred private counterparties instead of landing on institutions that funded themselves short.

Sources

• Anne Goldgar, Tulipmania: Money, Honor, and Knowledge in the Dutch Golden Age (University of Chicago Press, 2007).
• Peter M. Garber, Famous First Bubbles: The Fundamentals of Early Manias (MIT Press, 2000), and his earlier article in the Journal of Economic Perspectives (1990).
• Earl A. Thompson, "The Tulipmania: Fact or Artifact?", Public Choice (2007).
• Charles Mackay, Extraordinary Popular Delusions and the Madness of Crowds (1841), read as a primary source for the legend rather than for the events.
• Simon Schama, The Embarrassment of Riches: An Interpretation of Dutch Culture in the Golden Age (Knopf, 1987).
• Charles P. Kindleberger and Robert Z. Aliber, Manias, Panics and Crashes: A History of Financial Crises.
• Jan de Vries and Ad van der Woude, The First Modern Economy: Success, Failure, and Perseverance of the Dutch Economy, 1500–1815 (Cambridge University Press, 1997).