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Finance Dictionary and Glossary of Investment Terms
To add to an existing long or short position, after a move opposite that which was hoped for, in order to multiply by two the impact of subsequent changes, in the belief that the move in the wrong direction is temporary and short-lived.
A stock buying strategy that doubles the risk when the price moves in the opposite direction from the direcetion the investor hoped for. For example, an investor with confidence in ABC buys 1000 shares at $100 and another 1000 shares when the price declines to $90.