Investors who owned stocks in the 2010s generally experienced some big gains. In fact, the SPDR S&P 500's (NYSE: SPY) total return for the decade was 250.5%. But there's no question some big-name stocks did much better than others along the way.AT&T's Difficult DecadeOne underperformer of the last decade was telecom and media giant AT&T Inc. (NYSE: T).AT&T's decade was defined by two major buyout deals that significantly expanded the company's reach into the media space.In 2015, AT&T announced a $48.5 billion buyout of direct broadcast satellite service provider DirecTV. In 2018, AT&T completed an $85.4 billion buyout of media giant Time Warner and its subsidiaries, including CNN and HBO. Following the two massive buyout deals, AT&T now has nearly $200 billion in debt.AT&T shares started the 2010s trading at $28.58 and hit their decade low of $23.78 by the middle of 2010. AT&T shares then went on a tear over the next two years, peaking at $38.58 in mid-2012.From there, AT&T spent most of the next three-plus years trading sideways in a wide range of between $32 and $38. The stock finally broke out to the upside in early 2016. AT&T ultimately peaked at $43.89 in mid-2016, its high point of the decade. Since then, slowing growth and mounting debt have weighed on the stock.AT&T shares plummeted all the way down to $26.80 in late 2018 before rebounding once again to as high as $39.70 by the end of 20192020 And BeyondAT&T shares were hammered in early 2020 during the broad market COVID-19 sell-off, and the stock dropped to as low as $26.08, its lowest point since 2010. While the stock has since rebounded to around $30, it has still delivered underwhelming overall performance over the past 10 years.In fact, $1,000 worth of AT&T stock in 2010 would be worth about $2,065 today, assuming reinvested dividends.Looking ahead, analysts expect AT&T's rebound to continue in the coming months. The average price target among the 25 analysts covering the stock is $34.30, suggesting 15.3% upside from current levels.Related Links:Here's How Much Investing ,000 In The 2018 Moderna IPO Would Be Worth Today Here's How Much Investing ,000 In Roku's 2017 IPO Would Be Worth TodayPhoto by Tdorante10/Wikimedia.See more from Benzinga * Warren Buffett Says There's No Bubble In FANG Stocks, But He's Still Not Buying(C) 2020 Benzinga.com. Benzinga does not provide investment advice. All rights reserved.