This thread is possibly the dumbest of the year and this is the year of Quanto and wxytrader.
here’s the explanation of the note: OP is placing trades that no one would take the other side of. Placing trades costs money in terms of cancelation fees, routing costs, etc. while most of these fees are small they are real and tasty trade is bearing them for an order no one would execute against.
second the only trade that is trading are the ones where the OP is essentially locking in a loss because the spread will
Almost certainly be worth the full value and the OP is selling it for less than that. Tasty trade isn’t going to allow him to piss away all his money this way only to have him come back and sue them for allowing him to do this.
OP thinks that he can sell spreads at riskless prices but the world has an obligation to trade at a stale mid price.
OP should take tasty trade for arbitration for failing their duty as a broker. They should have never given him options trading access to begin with.
Your first sentence was superfluous, and I should probably not respond but ignore your comment because of the tone alone. But respectfully, while I cannot disprove you, I disagree with the rest of your comment.
High frequency algos and options dealers place and retract gazillions of unfilled limit orders per second. OP doesn't sound like he even uses automated trading. Respectfully, please quantify the broker's cost per placing a trade, or I don't believe in this theory as I believe the cost per order is perhaps an amount orders of magnitudes below one cent. Same for routing cost. We live in an age of high resolution wireless video streaming to just about every corner of the world. The cost of a few bytes of an order entry traveling the wires won't be measurable.
Regarding your remaining paragraphs. I know that box spread and similar vertical spread arbitrage trading has been a well known and popular strategy. Regardless whether this strategy works for certain markets or not - for the reasons that I mentioned before, I think the broker should have no reason to police and micromanage the individual orders of a customer. It is also kind of self contradictory - is it the order that would have been profitable for the OP, or is it the potentially loss making order, that was objectionable? Which one is it? Or should the broker perhaps leave the trading strategy choice to the customer? Nobody is forced to fill his order, and his orders had near zero margin risk, or the system should and would have instantly cancelled them. If not with the intent to arbitrage, box spreads or DITM vertical debit or credit spreads are commonly used to either invest spare cash or to borrow cash at implicit interest rates near the risk-free rate. Furthermore, walking up or down complex limit orders is a popular technique in options trading, which I use all the time, and which some brokers (e.g. Schwab) even offer as an automation tool of their trading platforms. In this context, the OP's orders and strategy don't even seem principally unusual or objectionable, regardless whether some of his specific limit orders got filled or not; and his question seems legitimate. Putting all these facts together, your comment makes little sense to me. The action of TastyTrade is hard to understand.
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