MORNING BID AMERICAS-Megacaps stumble at high bar as Fed decision awaited

It's a measure of the high bar of expectations now set for the expensive megacap U.S. stocks that even relatively positive earnings reports have seen some recoil in their lofty share prices. With the Federal Reserve's latest policy decision looming large later on Wednesday, yet another gloomy signal from China's ailing economy and the Big Tech earnings season grabbed investor lapels ahead of the bell as the so-called Magnificent 7 report fourth quarter profits. Microsoft managed to beat market estimates for profit and revenue as new artificial-intelligence features helped attract customers to its Azure cloud service and it built out its own AI services.