What was the 1637 Dutch speculative market collapse centered on?

The 1637 Dutch speculative market collapse was centered on tulip bulbs.

Tulip mania developed in the Dutch Republic during the 17th century, when rare tulip varieties became objects of intense speculation. Contracts for bulbs changed hands at prices far above ordinary agricultural value. In February 1637, buyers stopped accepting the highest prices, and bulb contract prices collapsed.

The episode is often presented as history's first financial bubble, but historians debate its scale and social impact. Modern research suggests that the popular story may exaggerate how many people were ruined and how broadly the mania affected Dutch society. Some contracts may also have been informal or difficult to enforce.

Tulip mania was not a stock-market crash because publicly traded shares were not the central asset. It is included in crash history as an early example of speculative excess, leverage, changing expectations, and a sudden loss of confidence. The collapse involved tulip contracts rather than shares in a corporation.