One thing that all investors can agree on is that markets fluctuate. Stock prices rise and fall for innumerable reasons. Fortunately, investors can use this market volatility to their advantage by investing in companies that create shareholder value through reliable dividends. In the presentation below we pit fast-food giant McDonald's (MCD 0.25%) against java giant Starbucks (SBUX -0.83%) to see which company is a better dividend stock for your portfolio today.