The old lore about the best way to cure a hangover is with a few more nips of whatever it was you were imbibing the previous evening, commonly known as “hair of the dog.”

The extension of this rally in stocks and just about every other asset identified with risk feels like a hair-of-the-dog situation. Between 2003 and mid-2008, easy flow of capital facilitated revelry in stocks, emerging markets, real estate, bonds, and high-yielding currencies.