Sixty Seconds of Chaos
San Francisco design firm Stamen teamed up with Nasdaq to visualize the frenzy of automated trading. This is one minute of bids and offers on March 8, 2011.
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Bloomberg Businessweek
In the hours before the opening bell rings at 9:30, trading algorithms ping Nasdaq with a range of buy and sell orders to test prices. Most orders are canceled and never result in a trade.
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On Aug. 1, 2012, Knight Capital’s algorithm relentlessly dumped the stock of flash memory company Spansion until exchange authorities cut them off. Price and volume data taken from multiple exchanges.