Nanex ~ 17-Oct-2013 ~ Walmart Stock Collapse
Walmart dropped 5.3% in less than 1 second on about 1,000 trades (200K shares) from
11 exchanges and one or more dark pools. Price came to 1 cent of triggering a limit
up, limit down (LULD) halt. LULD basically has legitimized sudden large price moves
in mega-cap stocks. High Frequency Traders placed and canceled more than 4 orders at
the top of book for every trade execution during the drop.
1. WMT ~ Trades color coded by reporting exchange from 15:02:28 to 15:02:55.
2. WMT ~ Tick Chart.
3. WMT ~ 1 Minute Chart.