“We saw an initial relief rally on the confirmation that demand is strong, but investors are now asking the next questions, which are, what about the power needs, what about margins, what’s the ROI?” said Natalie Hwang, managing partner of Apeira Capital Advisors. “Relief rallies can’t hold so long as the market has unanswered questions.”The uncertainty was highlighted by the stock market’s wild swing Thursday in the wake of Nvidia’s earnings report. The chipmaker’s shares initially jumped more than 5%, sup ...