Nanex Research
The RIO Event
On March 21, 2012 at 12:01:23, the stock chart of RIO looked like the schematic for
a rollercoaster. There is a 500 millisecond period of silence (no trades) right at
the top. The drop was over 1% and lasted about 1 second on significant volume.
25 millisecond interval chart showing trades colored by reporting exchange.
25 millisecond interval chart showing the NBBO
Shaded black if normal, yellow if locked
(bid = ask) or red if crossed (bid > ask).
5 millisecond interval chart showing trades colored by reporting exchange.
Note the eerie period of silence at the top.
5 millisecond interval chart showing the NBBO.
Shaded black if normal, yellow if locked
(bid = ask) or red if crossed (bid > ask).
Nanex Research