Nanex has a lot of research on high frequency trading. Below is the rise of HFT machines, computer trading programs, from 2007 to 2012. There's no legend, but the x-axis is time (9:30AM to 4PM trading hours) and I believe the y-axis is millions of shares traded.
Q1 GDP Tracking: Movin' on Up
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From BofA:
Since our update last week, *1Q GDP tracking is up two-tenths to 2.1% q/q
saar*. [Apr 19th estimate]
emphasis added
From Goldman:
We left ou...
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