I remember during the US Election night a lot of stocks that didn't usually trade were trading on November 5th after hours. I was following DJT as a proxy for Trump's chances and when he won Pennsylvania DJT stock skyrocketed 50% higher in a few minutes. I'm pretty sure the CME is getting to roll out single stock futures soon so probably any liquid stock will have its own futures contract.
This would benefit smaller accounts that require larger deposits to get risk based margin while futures are all risk based. The PDT rule is very antiquated and does not apply to futures. A con will be some of those traders should not be trading with more leverage.
Now I understand why many beginner day traders trade future instead of the underlying: The exchange wants people who do not know how to trade to assume more risks with highly leveraged instruments.
Yea..I am only in Thailand only in winter months, but this winter I have noticed serious pre-market volume and good limit fills in most of the mag 7 and others that are grouped near them in volume and interest. And very recently I have noticed even less well known stocks with recent big news gaining very good volume very quickly starting around 6:30-7:00am. This makes for interesting trading here because its 4pm through 9:30pm. And then in the extended hours, still very good volume in those same names all the way through 8pm (which would be 6:30-8am here). So, trading in asian hours has very much changed for the better. I haven't looked at 24 hour trading.