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Technology Stocks : DoubleClick Inc (DCLK) -- Ignore unavailable to you. Want to Upgrade?


To: David Lee who wrote (334)7/2/1998 4:05:00 PM
From: Chip Anderson  Respond to of 2902
 
Here a simplistic explanation:

When a stock price rises a certain amount above the price that a short paid for their position, their brokerage firm forces the short to "cover." Shorts cover by actually buying the shares that they borrowed when they opened their short position. It's basically a reverse margin call. If lots of shorts get caught when a stock rises quickly, they all must cover at the same time and that causes a huge surge in buying pressure forcing prices even higher (causing more shorts to cover, etc, etc.)

Chip