This slow-and-steady stock could outperform the S&P 500 after lagging it for years.Most investors who buy Altria Group (MO 1.25%) stock aren't doing it in hopes of enjoying explosive share price gains. The stock has underperformed the S&P 500 for years. But the dividend? That's another story. Altria is a world-class dividend stock with a massive yield and a track record of payout hikes spanning more than five decades.The Dividend King has shown some life this year. This month, the stock climbed above $56 to ...