It will be.......there is already overnight trading in nearly 1000 stocks on robinhood. Let me tell you having access to over night trading is very sweet. All night long the fomo keeps everything green and sparkly, you buy and it just keeps going up up up. ...
Tonight nvda will slowly rise above 900 all while everyone misses out on that free 2% gain by waiting to buy it at market open. Watch the gap up occur in the overnight. That stock and all other semis
Round-the-clock trading is not that useful unless the big boys also trade after RTH. In most cases, You are going to get an extra wide bid-offer spread after RTH.
Case in point CRWD was up like 30% in the illiquid AH trade and it barely eeked out a 10% gain in regular hours.