Nanex Research

Nanex ~ 13-May-2013 ~ STN Stub Quotes

On May 13, 2013, the quote spread in the stock of Stantec Inc. (Symbol STN, Market Cap $1.95 billion) over a 5 second period, widened from $0.30 to over $600. The best bid price reached a low of $4.25 and the best ask price reached $616.63. There doesn't seem to have been any news or justification for this meltdown. Over 1,500 quotes from 7 exchanges actively updated during this period.


1a. STN - Bids and asks color coded by reporting exchange along with NBBO in dark gray.


1b. STN - Bids and asks color coded by reporting exchange along with NBBO in dark gray. Zooming in on prices from $40 to 0.


2a. STN - Bids and asks color coded by reporting exchange along with NBBO in dark gray. Zoom of Chart 1a.


2b. STN - Bids and asks color coded by reporting exchange along with NBBO in dark gray. Zoom of Chart 1b.


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