Edit: question who's buying up the stocks that are left behind?
All that is gone. Stocks are mostly based on consumption of goods…. people wouldn’t be out shopping like that, and in all likelihood would just take whatever they want with so much left behind. There would definitely be a period of resource hoarding (learned from cacs), but that would dissipate when folks realize it’s unnecessary.
Modern currency is not backed by anything, which already strains the financial industry and keeps us on the brink of economic collapse, along with steady inflation. The world uses the dollar bc the US basically forces it with threat of military intervention. That’ll end. There would be a reset of currency backed by legitimate valuable commodities (gold, silver etc). The brehs working at Fort Knox and other mineral reserve facilities would need to quickly lock that down. Brehs working at bases and hidden research facilities (Area 51 and whatnot) would also need to grab that up.
Black Americans would be in a good position. We still have a former president and First Lady, numerous political reps, CEOs, hedge fund managers, techie brehs, HBCUs, truck drivers, train conductors etc to have a thriving nation.