Walmart can continue to outpace Amazon and the S&P 500 if it does well in these two areas.Walmart (WMT 1.35%) shares are up by 25% so far this year, putting them ahead of the S&P 500 during that time. Some investors wrote off Walmart just a few years ago, thinking Amazon (AMZN 1.24%) was the better stock. Even Warren Buffett dumped his Walmart stock back in 2018, but that ended up being the wrong call.Walmart has two major catalysts riding into 2026 that can determine if the rally continues. Online ads can ...