TIL that in 2010 the stock market experienced a flash crash, when over a trillion dollars were lost and mostly regained, all in 36 minutes. The crash was caused by automatic trading, although the exact causes are not definitely determined.

submitted by Jashfior from en.wikipedia.org

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[–]Earl_Harbinger 4 insightful - 1 fun4 insightful - 0 fun5 insightful - 1 fun -  (0 children)

That's why we need a required 1 second delay between trades on the same stock by the same entity, and/or a 1¢/transaction tax. Zerohedge used to have some great articles on this subject.