Global tech stocks erase $1.8 trillion in days as U.S. stock futures rebound and AI spending fears rattle markets

Global tech stocks erased $1.8 trillion in market value this week. Heavy selling hit AI and Big Tech leaders. Investors questioned rising capital spending. Profit visibility weakened. U.S. stock futures rebounded Friday. S&P 500 and Nasdaq futures turned positive. Relief was cautious. Bitcoin stayed volatile. EV and silver markets remained stressed.