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In page Wall Street crash of 1929:

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With the bankers' financial resources behind him, Whitney placed a bid to purchase 25,000 shares of U.S. Steel at $205 per share, a price well above the current market.[6] As traders watched, Whitney then placed similar bids on other "blue chip" stocks. The tactic was similar to one that had ended the Panic of 1907 and succeeded in halting the slide. The Dow Jones Industrial Average recovered, closing down only 6.38 points (2.09%) for the day.[citation needed]