Stats Intraday and market microstructure Flash crash 2010

The Dow fell 995 points and got it back in twenty minutes

TimeWhat happened
14:00DJIA down 161 points at 10,712. An unsettled day already, on European sovereign debt news.
14:30DJIA down about 2.5%. Buy side liquidity in the E-Mini has fallen from nearly $6 billion that morning to $2.65 billion, a 55% decline.
14:32A mutual fund complex begins selling 75,000 E-Mini contracts, about $4.1 billion, through an algorithm set to take 9% of the previous minute's volume with no regard to price or time.
14:41 to 14:44The E-Mini falls about 3% in four minutes. By 14:44 high frequency traders have traded nearly 140,000 E-Mini contracts, over 33% of total volume.
14:42:40Resting buy orders in the E-Mini are down to 15,000 contracts, and keep declining for the next three minutes.
14:45:13 to 14:45:27In fourteen seconds HFTs trade over 27,000 contracts, about 49% of all volume, while buying only about 200 contracts net. The E-Mini falls another 1.7%.
14:45:28CME Stop Logic Functionality pauses the E-Mini for five seconds. Buy side depth is about $58 million, under 1% of that morning's level.
14:45:33E-Mini trading resumes. Prices stabilise and begin to recover.
14:45 to 14:47The DJIA, S&P 500 and Nasdaq 100 all print their lows for the day. DJIA low 9,872.57.
14:46:063M trades at $67.98, down 18.39%.
14:47:15Procter and Gamble trades at $39.37, down 36.14%. The deepest fall of any Dow 30 name.
14:47:28The iShares Russell 1000 Growth ETF trades at $0.0001.
14:47:54 to 14:48:01Accenture trades at $0.01, for seven seconds.
14:50DJIA back at 10,232.
14:55:32The Vanguard Total Stock Market ETF trades at $0.15.
14:58:14The iShares MSCI EAFE Growth ETF trades at $0.0001.
15:00Most securities are back to trading at prices reflecting consensus values. Between 14:40 and 15:00 roughly 2 billion shares changed hands, over $56 billion.
16:00DJIA closes at 10,520.32, down 347.68 points or 3.2%.

Sources: SEC and CFTC preliminary findings, 18 May 2010, and joint findings, 30 Sep 2010.

On 6 May 2010 the US stock market fell about 9.2% and recovered most of it within twenty minutes. The Dow bottomed 995 points below the previous close, and Accenture printed at one cent. 20,761 trades in 326 securities were later cancelled.

9,872.57Dow low, 6 May 2010
-3.2%Dow close that day
20,761Trades cancelled
5 secondsThe pause that stopped it

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