Anyone know what happened with HRB today - at around 14:00 EST? I bought at 46 for a swing trade, then watched in disbelief as the spread almost instantly went to 45.50x45.90. As I didn't know what was going on, I covered on Instinet without losing much, as I could not split the bid and offer. Specialist would not let me out. Currently it is trading at 46.30x46.34. Now, usually I prefer to trade NYSE, but dropping the bid like that seems to clash with the "fair and orderly market" slogan.