On July 20, 2012 we saw three ETFs exhibit abnormal behavior after hours - all three ran the ask price (and the NBBO) to the moon in a matter of 20 seconds.

What was even more curious were the symbols involved - CURE SICK COWS (we're not making this up).

Below is an animation of the sequences in each, note the symbol cycling through each new animation:

As of August 3, 2012 it would appear that they have decided to kill the SICK COWS rather than CURE them: Dead SICK COWS Read more HERE.

How to read this sequence

Nanex Ongoing Research