On September 18, 2012, starting at about 9:34 EDT, There were several blasts of quotes
in the symbol VIIZ. No trades occurred during the period shown in the charts below.
1. VIIZ 1 second interval showing bids and asks color coded by exchange.
The SEC says looking any closer than this resolution isn't worth while.
2. VIIZ 25 millisecond interval showing bids and asks color coded by exchange.
That one line blob is now 4.
3. VIIZ 2 millisecond interval showing bids and asks color coded by exchange.
Lots of line blobs.
4. VIIZ 2 millisecond interval showing best bids and asks color coded by exchange.
Showing just the NBBO really cleans it up (but why are those other quotes even in there?)
5. VIIZ 1 millisecond interval showing best bids and asks color coded by exchange.
Chart shows 1 second of data.
This is the 2nd line blob from Chart 1.
6. VIIZ 1 millisecond interval showing bids and asks color coded by exchange.Chart shows 1 second of data.
This is the 3rd line blob from Chart 1.
7. VIIZ 1 millisecond interval showing bids and asks color coded by exchange.Chart shows 1 second of data.
This is the 4th line blob from Chart 1 (appears as just 3rd blob, but there are 2 separate
ones).
Nanex Research
