Did anyone else read the article in Barron's re; the exchanges whining about "bandits" using the auto-ex systems to arbitrage among the exchanges?? Preferred was one of the brokers listed as having clients on some sort of watch list by the exchanges. This morning I placed asell order at the bid on PCOE. It did not execute but immediately showed up as the best ask replacing CBOE's quote. So the question is; is auto-ex turned off or was it because the exchange is monitoring orders from Preferred et al??