As the Daily Beast explains "speculators" in the secondary market may have sold tickets that they never had, . . . hoping to buy them late in the week cheaper than the price they sold them at, so they could complete the delivery.
When one does this on the stock market, it is called "short selling". There is a well known aphorism warning short sellers of the potential danger in such "investing":
""He who sells what isn't his'n, Must buy it back or go to prison"__ Daniel Drew
This is unlikely to turn out well.
