Ferdinand von Spanien
The increases of the 1630s corresponded with a lull in the Thirty Years' War. In 1634/5 the German and Swedish armies lost ground in the South of Germany; then Cardinal-Infante Ferdinand of Austria moved north. After the Peace of Prague the French and the Dutch decided to support the Swedish and German Protestants with money and arms against the Habsburg empire, and to occupy the Spanish Netherlands in 1636. Hence market prices, at least initially, were responding rationally to a rise in demand. The fall in prices was faster and more dramatic than the rise. Data on sales largely disappeared after the February 1637 collapse in prices, but a few other data points on bulb prices after tulip mania show that bulbs continued to lose value for decades thereafter.