Altria business faces tough challenges, but it pays hefty dividends. The S&P 500 has gained more than 26% in the last year. However, it's important to remember that not all stocks benefit from a strong market. During this time, Altria Group (MO 0.28%) lost about 2%. Does this present a buying opportunity? Or should you sell the shares and invest that money elsewhere? To make that determination, it's time to better understand Altria's business and prospects. Declining business Altria produces cigarettes, cig ...