
Doug is a Chartered Alternative Investment Analyst who spent more than 20 years as a derivatives market maker and asset manager before “reincarnating” as a financial media professional a decade ago.
Before joining Britannica, Doug spent nearly six years managing content marketing projects for a dozen clients, including The Ticker Tape, TD Ameritrade’s market news and financial education site for retail investors. He has been a CAIA charter holder since 2006, and also held a Series 3 license during his years as a derivatives specialist.
Doug previously served as Regional Director for the Chicago region of PRMIA, the Professional Risk Managers’ International Association, and he also served as editor of Intelligent Risk, PRMIA’s quarterly member newsletter. He holds a BS from the University of Illinois at Urbana-Champaign and an MBA from Illinois Institute of Technology, Stuart School of Business.
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

The Dutch Tulip Bubble (“Tulip Mania”) was a speculative frenzy in 17th-century Holland over the sale of tulip bulbs. Tulips were introduced into Europe from Turkey shortly after 1550, and the delicately formed, vividly colored flowers became a popular if costly item. The demand for differently colored varieties of tulips soon exceeded the supply, and prices for individual bulbs of rare types began to rise to unwarranted heights in northern Europe.
By about 1610 a single bulb of a new variety was acceptable as dowry for a bride, and a flourishing brewery in France was exchanged for one bulb of the variety Tulipe Brasserie. The bubble reached its height in Holland during 1633–37. Before 1633, Holland’s tulip trade had been restricted to professional growers and experts, but the steadily rising prices tempted many ordinary middle-class and poor families to speculate in the tulip market. Homes, estates, and industries were mortgaged so that bulbs could be bought for resale at higher prices. Sales and resales were made many times over without the bulbs ever leaving the ground, and rare varieties of bulbs sold for the equivalent of hundreds of dollars each.
The crash came early in 1637, when doubts arose as to whether prices would continue to increase. Almost overnight the price structure for tulips collapsed, sweeping away fortunes and leaving behind financial ruin for many ordinary Dutch families.
The tulip craze was an early example of the greater fool theory—the willingness to buy an asset not because of its fundamental value but because of the belief that someone else is likely to pay an even higher price than you did.
This article was most recently revised and updated by Doug Ashburn