stock...if you think that is crazy then you should watch some of the craziness that go on in thinly traded nasdaq stocks. i'm going to say the stocks i watch now for this kind of craziness but it is on the level of when GPRE ipo'ed. there are other recent examples but GPRE is the one i can remember off the top of my head since that was the first crazy one i saw on the nasdaq.
it's certainly not abnormal for the amex. i think the biggest joke in recent history on the amex was PLX.
you also see the amex freakin break all the time too. i mean yesterday day they just broke down and they couldn't figure out if they received the messaging on orders that were sent. luckily it was only a market of 300 efa that got hung up and it ended up turning out they never got the order. but who cares i've certainly made a lot more off of their fuck ups as opposed to the times when they screwed me. i wonder what the last day is gonna be like for the amex...hopefully i'll kill it.