The S&P 500 and Nasdaq climbed to new record highs on Thursday, as Microsoft's blockbuster earnings propelled the tech giant past the $4 trillion milestone and fueled investor confidence in Big Tech's hefty investments in artificial intelligence. Microsoft became the second publicly traded company after Nvidia to surpass $4 trillion in market valuation, following a blockbuster earnings report. Meta Platforms also climbed 12.1 per cent to an all-time high in early trading, after the social media