I was getting the same impression. Surely these traders couldn't be so dense? This isn't even necessarily a HFT issue. If I go look at the quote for a stock on

I was getting the same impression. Surely these traders couldn't be so dense? This isn't even necessarily a HFT issue. If I go look at the quote for a stock on Google Finance, the only thing I'm completely sure of is that the value displayed is not in fact the accurate price. It's a reflection of the past.