Walmart (WMT 0.94%) stock gained 13% in November according to data from S&P Global Market Intelligence. It reported strong third-quarter earnings amid a challenging operating environment.Shifting into new trendsWalmart is the largest company in the world by sales, so it's all the more impressive that it can keep building on top of that. It is constantly upgrading its stores and platforms with new product lines, expense management, new ventures, and more. There are always things to do to function better and ...