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Scoop.it!
The cost of #HFT - new charts showing growth of quotes vs trades since 2000 http://t.co/YYI2XNpGf1 
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Scoop.it!
The current N/P earnings guidance ratio of 11.4 for Q4 2013 is the worst on record.
Ellie Kesselman Wells's insight:
S&P 500 companies have issued negative expected earnings guidance 103 times and positive guidance only 9 times. This 11.4 negative-to-positive (N/P) ratio is the highest (worst) on record, ever. The highest N/P ratio prior to this quarter was 6.8 for Q1 2001. * The data is incomplete, as it was collected in late November.
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Now versus 1999: 100 times as many quotes, same trading volume
Chronology: Reg NMS - January 2006
Advent of high frequency trading - March 2006