Quote from Jerkstore:
What? Absolutely not. Flash trading is nothing more than prearranged trading by another name. Both the flasher (the customer benefits if voluntary, and the broker almost always benefits) and flashees are benefitting at the detriment of every market participant not involved. The trader who is on the receiving end of adverse selection pays the largest price. The cost to the rest of the market participants who are not privy to the flashed info is more difficult to measure, though it is definitely significant.
The trader who posts to NBBO publicly is providing price discovery and should be rewarded with trades. No trader should be able to sit back and cherry pick flash trades. Remember the term "carp" from the floor? How about when brokers did "whisper trading" with their buddies? There is a very good reason why these practices were discouraged (sometimes violently) on the trading floor. Flash trading is the worst of both of these practices.
I actually don't think you've made a huge new point here, but of course I can't disagree re: price discovery and the auction mechanism. And I don't think you can actually elect for an order to be "flashable", so there's no benefit to the broker. It's part of the exchange matching process. But again, that's going to be specific and I don't know the options world at all at this point. If you could point to a definition or rule somewhere I'd like to see it though.
[...] After a second of flashing the trade on the ISE, not only may the NBBO change organically, but you will also have to compete with frontrunning a$$holes. Think about a one second flash auction at the ISE. (I forget the exact time, but it was a second when the flash auction program began.) Every ISE member who can write code has the ability to see this order as well as the chioce but not the obligation to step up and trade the order. If they choose not to trade your order, these participants can easily use the info to front run your trade to other exchanges where they can lift the deltas or vol risk liquidity in front of you.
Again, we're going to have to get into specific definitions. In its original incarnation, Flash orders were only sent to participants who partially filled an order that was to have its balance routed away. In other words, liquidity providers were given an opportunity to do more of the same thing, and no one who didn't participate in the first place could execute against a Flash order. In addition, they're only sent to a select group, and never posted publicly. So the only way NBBO/away markets could change is if someone partially filled a Flash order, saw there was more size, and then went away and scratched their trade. That's not going to be common, but you're right, that screws the aggressing order. I stand corrected.
[...] Almost any sophisticated trading company can access flash quotes. Those companies that trade with a customer designation can typically still access the information via a broker's membership. Of course you have to put up huge size for your broker to spend their time working with you on this project, but it happens quite often. It is the retail customers, and those without access to programmers who have no ability to access private flash info. It tends to be this same class of trader that has no idea their order is being flash auctioned and chewed up. These poor chaps are getting chewed apart. The regulators need to step in and outlaw this incidious practice.
I agree it should be banned, but it is 100% untrue that anyone ("sophisticated" or otherwise) can get access to the info. At least on some exchanges; maybe options is different.