In his latest book, Niall Fergusson suggested a strategy that went something like this (let's see if I remember it): Step 1: Get a bunch of investors' capital and buy government bonds. Step 2: Use bonds as collateral to sell options protecting against an improbable collapse in the market. Step 3: Repeat Step 1 with the money you got from sale of options (every repetition will be much smaller than the previous). Step 4: If the market doesn't crash... make a hefty profit. Do this every year until the market crashes collecting large bonuses along the way. When the market crashes, laugh at the poor fools that invested their money with you.