Studies show that companies that initiate a dividend and grow the payout over time outperform all other stocks on the market. And why not? Dividend growth stocks have a successful track record of financial discipline and profitability. It allows their competent executives to exploit a competitive edge in their industry. UnitedHealth Group (UNH) Health insurer UnitedHealth Group (NYSE:UNH) raised its dividend 12% to $2.10 per share last month. This marks the company's 14th consecutive year of raising the pay ...