Nvidia shares rose 8.74%, delivering a nearly half-trillion-dollar boost to the artificial-intelligence trade after concerns about venture profitability, complex data-center debt deals and future chip demand had raised doubts on Wall Street. Nvidia’s growth has become so embedded in investor expectations that the stock has declined in six of the past eight post-earnings trading sessions as traders anticipate results that exceed forecasts. A large group of options traders was betting the shares would fall after Wednesday’s quarterly report.