Zzzz...
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note: mm can naked short as they are exempted from normal rules.
the market maker has an exemption. he's allowed to naked short for the purpose of making markets.
The very moment I read first quote, the scheme started to make sense. Basically MM carry short position for a guy, but MM do not have to pay short interest!
That sucks, and the system is screwed. (While I have not understood why the guy saving on short interest only for 3 days, not for whole week, but those are nuances).
WAG from the noob, may be cuz calls were actually "exercised", right away the day calls were sold and from the point of particular software they might simply not counted toward open interest. Could be a bug, or even technicality that depends on how you define OI.and i still can't find another explanation for why thousands upon thousands of deep-in-the-money calls keep trading on the philadelphia options exchange and never show up in open interest the next day.
It makes perfect sense. At least in my mind.i know my theory sounds a bit insane.
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