Bear market stock rallies are sharp up moves within steeper, longer term market declines. Like dips within broader bull markets, bear market rallies can be surprisingly powerful. In March 2009, the Dow Jones Industrial Average (DJIA) gained 20.3 percent in 11 days as it began to rebound from a 12-year low. The Dow rose that fast only three other times since its October 1987 crash. And the market didn’t stop there, climbing another 35 percent by Dec. 2. The magnitude of this advance clearly has been unusual, and the behavior of many stocks has defied expectations. Read on to place the stock market’s rebound in historical context.