By the 1930s of 17, a tulip was worth 1 10,000 to 20,000 guilders, and the most expensive tulip could reach the current price of tens of thousands of dollars. At that time, the annual income of washerwomen and nurses was only a few dollars. According to records, the value of a tulip flower root can be equivalent to any of the following: 4 tons of wheat, or 4 cows, or 8 pigs, or 12 sheep. In the craziest time, someone traded a tulip for a new carriage, plus a full set of harness and two gray horses.

There is also a story in a book. A sailor came back from a long voyage and brought back many precious things to a businessman. The businessman was so happy that he gave the herring to the sailors. At that time, the businessman was "frying" tulips and there was a white tulip on the table. When the sailor finished eating the fish, the businessman suddenly found that the tulip was gone, so he was surprised and looked around. Seeing this, the young sailor patted his head and said, "I said today's onions taste different." It turns out that the merchant's treasure has turned into an onion and has entered the sailor's stomach. You know, that tulip was worth 3,000 guilders at that time, equivalent to about 20,000 dollars now. A sailor's cargo may not be worth that much money. As a result, sailors were sent to prison, while businessmen suffered heavy losses.

When tulips are in short supply, middlemen keep appearing. The bad thing is that Dutch people with a long business tradition trust each other very much. So many transactions have evolved into contract sales. The contract passed from you to him, and the price kept rising. The buyer pays not money, but a piece of paper (credit), and the seller gets a piece of paper. Where are the flowers? Nobody cares, it's all short anyway. What's more, some stock markets have introduced options. In order to lower the trading threshold, a tulip is divided into several parts, and traders can buy and sell some tulips. As soon as the option appeared, the price of tulips rose several times.

1636, this speculative fever reached its climax. The buying and selling of contracts entered the Amsterdam Stock Exchange, which became similar to the buying and selling of stock futures. Tulip markets have also appeared in various parts of the Netherlands. In some places, transactions are only held at cocktail parties. There are usually hundreds of participants, and everyone is shouting at the price while drinking, which is very lively. 1637 February, no one can tell the reason. The heat plummeted and the price of flowers plummeted. Some went bankrupt overnight; Some signed a contract and refused to pay the price. Then, the recession struck, and no one was spared.