Monday, ONB reported 2009 Q2 non-GAAP earnings of $9.6M or $0.15/share, which was nearly double analyst expectations. $0.15/share for Q2 2009 is about half of what it earned in Q2 2008 and $4.6M of these profits were a one-time occurrence. Nevertheless, Wall Street didn't let such a triviality get in the way:
As you can see, the July 27th close was an extreme outlier (>3σ from the mean). Perhaps, the intrinsic value of ONB increased 17% in the course of minutes, but I'd wager that rampant speculation is a more reasonable explanation. Recently, there has been some discussion on the internet as to how a bubble can be spotted before it deflates. It would appear that periodically screening asset prices for this type of situation might be useful and merits further investigation.