Bro I'm not saying to sell your puts but read 2 h ago a possible trade deal with China by Thanksgiving and even without that the market pushes irrationally higher
There is no one system; there's the clearing houses though. From my experience, puts at the edge of being in or out of the money tend to get assigned in volatile markets. "options are assigned even if they are in the money by a penny" is not always true. the converse is also not a rule.
But if you get assigned that put, this is the best way to get it assigned. You're already in profit when trading resumes, and if your broker allows 24 h trading you can enter an order to sell right when trading begins.
Alternatively, the stock market is clearly haunted, on account of the NYSE probably being on top of an Indian burial ground.
Native Americans or overworked H-1b freshers, both are equally likely.
He also talked up having 600,000 Chinese students study at U.S. universities and said the U.S. needed to bring in more workers from overseas through the H-1B visa program because native-born Americans lack “certain talents.”