Walmart Inc (NYSE:WMT) stock is gapping to record highs today, after the retail giant posted better-than-expected second-quarter earnings of 67 cents per share and revenue of $169.34 billion. The company also lifted its full-year forecast, though noting it was more cautious about the second half of the year. As the largest U.S. retailer, Walmart earnings are injecting some optimism into the market today, alongside strong U.S. retail sales data. WMT isn't the only outperformer on the Dow Jones Industrial Ave ...