Nanex Research
Nanex ~ 14-Feb-2013 ~ SLCA Smackdown - 9% in Seconds
On February 14, 2013 at 10:xx:xx, the stock of U.S. Silica Holdings, Inc. (symbol SLCA) dropped about 9% in less than 2 seconds. Most of the drop occurred in about 1/3 of a
second.
1. SLCA showing trades color coded by exchange and NBBO (gray shading)
2. SLCA showing trades color coded by exchange and NBBO (gray shading) - Zoom
of above. Chart shows 5 seconds of time.
Note the late dark pool trade reports (green squares).
3. SLCA showing trades color coded by exchange and NBBO (gray shading). Same
as chart above, but removed Dark Pool trades for clarity.
Chart shows just 5 seconds of time.
4. SLCA showing bids color coded by exchange and NBBO (gray shading). Note how
many bids were placed and canceled on the way down.
5. SLCA showing best bids and asks color coded by exchange and NBBO (gray shading)
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