Find out whether AT&T's dividend-powered returns can really compete with the broader market in the long run. Investing in AT&T (T 2.15%) over the past two decades has delivered mixed results for long-term investors. Let's break down what a 10,000 investment in AT&T would look like today, starting in June 2004. 20-year results AT&T's stock price has not shown significant appreciation over the past 20 years. Your hypothetical 10,000 investment would be worth $9,752 today. That's a negative return, leaving y ...