https://zenodo.org/record/4718936/files/005 - SEC SR-DTC-2021-005-2 - submission of rule finding.pdf?download=1
Don't think this would create a blanket requirement for deliverable/unpledged securities against short call options.
Obviously this is a deep ITM put. What you are ignoring is the carry (underlying+put, or more easily STRIKE). Suggest a book, options pricing theory, 101.
Bloomberg editor is a math-incompetent-clown. How do you make 3.5 billion from 110,000 $5 wide verticals??? More like "cheddar please, medium well" is what he needs to listen to.
as PTJ would regularly send his goons into the pits in an attempt to further panic a falling market or to recklessly bid a rising market I don't think being a SJW was on his mind. I wound up with maybe 10s of millions of his money so it worked for me... Perhaps his hypocritical nature finally...