Not ready to start a journal yet, but just wanted to state that true risk-free options arbitrage still works in 2019. It's rare and not a big income generator, but possibly done all day long by some market makers, and probably little differently.
I wrote my own arbitrage bot and in my case it's second time it worked the day after AMZN earnings, buying variety of multi-leg combos at market open. Ten seconds after market opens it no longer works. Occasionally this worked on a few other stocks during the day, and once at market close, though market makers quickly plug such leaks.
I'm basically placing hundreds of orders as the market opens for various multi-leg option combos, seeking to arbitrage between stale orders sitting at exchanges and possibly overnight orders from people trying to get out of losing positions. Basically ending up buying at credit some combos that must have positive value, then selling them the same day at profit regardless of stock price.
At the same time I suspect that I catch market makers themselves in cross-fire, or arbitraging between multiple market makers in the chaos of market opening.
And I don't believe this can work with any other broker than Interactive Brokers, so they really are irreplaceable in some aspects. I also don't believe that anyone using Greeks would be able to do this, as they're so focused on options Greeks they don't see stuff where Greeks are detrimental and obstruct the picture. (I suspect I see more stuff thanks to being free of Greeks, which I may post in the future)
(the last position above is a regular long-term bet that is currently losing)
Here is another AMZN batch from October 26, 2018
I wrote my own arbitrage bot and in my case it's second time it worked the day after AMZN earnings, buying variety of multi-leg combos at market open. Ten seconds after market opens it no longer works. Occasionally this worked on a few other stocks during the day, and once at market close, though market makers quickly plug such leaks.
I'm basically placing hundreds of orders as the market opens for various multi-leg option combos, seeking to arbitrage between stale orders sitting at exchanges and possibly overnight orders from people trying to get out of losing positions. Basically ending up buying at credit some combos that must have positive value, then selling them the same day at profit regardless of stock price.
At the same time I suspect that I catch market makers themselves in cross-fire, or arbitraging between multiple market makers in the chaos of market opening.
And I don't believe this can work with any other broker than Interactive Brokers, so they really are irreplaceable in some aspects. I also don't believe that anyone using Greeks would be able to do this, as they're so focused on options Greeks they don't see stuff where Greeks are detrimental and obstruct the picture. (I suspect I see more stuff thanks to being free of Greeks, which I may post in the future)
(the last position above is a regular long-term bet that is currently losing)
Here is another AMZN batch from October 26, 2018
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I was literally stealing their money.