U.S. markets ended Tuesday's session slightly lower as stocks bounced back and forth on positive earnings reports to digesting geopolitical uncertainties. Stocks reversed course and moved slightly higher after giving up earlier gains on news The European Union had agreed on economic sanctions against Russia. McDonald's (MCD) Japan announced it will not report earnings and sales forecasts after allegations a Chinese supplier sold expired meat. McDonald's in Japan will start selling Tofu nuggets on Wednesday. Windstream (WIN) shares shot up after saying it plans on turning into a real-estate investment trust to avoid taxes. Other telecoms like Verizon (VZ) and AT&T (T) also rallied, on investors hopes that they would follow suit. Companies set to report earnings Wednesday include Whole Foods (WFM), Barclays (BSC) and Weight Watchers (WTW). TheStreet's Susannah Lee reports from Wall Street.