UnitedHealth Group Incorporated (UNH)

The Argus Dividend Growth Model PortfolioDividend income, an important element of total return, is often overlooked amid gyrations in the stock market. Between 1930 and 2012, dividend income accounted for 42% of the total return of the S&P 500, according to Hartford Funds. And that's just the average. In some decades, dividends accounted for more than 50% of total returns and even 100% of returns. More recently, dividends have accounted for 15%-20% of returns. Still, in 2018, dividend payments softened the blow when most market indices declined as the Federal Reserve hiked rates. The pattern is being repeated in 2022 as well. Not all dividends are created equal, though, and it is important to understand the difference between the two main categories: high-yield stocks and dividend-growth stocks.