I was listening to two different people at the same time, and I'm away from my real-time charting program so I coudln't check.
I just changed the title to reflect.
Holy Shit. Accenture dropped from $40 to $0.01, and now it's back in the high $30s.
Regardless of the details, this is an example of how markets aren't perfectly efficient.
[citation needed]
You might as well consult a historian.
No. Just that the last reported transaction may not be `true' price.
There are other arguments against efficiency of markets, but this isn't.
According to the data I'm seeing for ACN now, the whole drop happened over a 1 minute period, and was back up the next minute.