Selling a security short has rarely been a way to make friends, whether with investors, companies, regulators, or even governments. If the Fed’s job included (in more disciplined times) taking “away the punch bowl just as the party gets going,” the short seller was and is the person who tells partygoers that the punch they are so enjoying is, in fact, poison. No one wants to hear that.

Bubbles, on the other hand, whether in a stock, sector or market, are popular. And the bigger the bubble, the more popular it becomes: “Everyone” is making money, “everyone” is spending money, and governments take their slice. The boost to revenues that comes from taxing the higher salaries, the higher capital gains and the higher profits that a bubble generates can make a spendthrift government look frugal, and a careless government look wise. To be told that all this is based on a mirage, well . . .