Stocks are ending higher on Wall Street as Walmart and major airlines post solid gains, the AP reports. Walmart jumped 4.5% Tuesday after the giant retailer said it expected a 40% surge in online sales next year. United Continental rose 4.7% and American Airlines climbed 4.8% after delivering strong forecasts for the third quarter. The Standard & Poor's 500 index rose 6 points, or 0.2%, to 2,550. The Dow Jones industrial average gained 69 points, or 0.3%, to 22,830, another record. The Nasdaq composite rose 7 points, or 0.1%, to 6,587. (More stock market stories.)