NEW YORK ( TheStreet) -- Bank of America ( BAC) has underperformed its peers in periods where the broader market has fallen and in periods it has risen so far in 2013, suggesting a shift in how investors view the stock. Bank of America was one of the worst performers among global U.S.-based banks coming out of the subprime mortgage crisis, due to its heavy exposure to Countrywide Financial, the largest underwriter of mortgages that turned sour. Bank of America shares lost nearly 68% from the start of 2008 through the end of 2010, worse than Morgan Stanley ( MS), Goldman Sachs ( GS), JPMorgan Chase ( JPM) and Wells Fargo ( WFC). Only Citigroup ( C) performed worse. However, after the U.S. Treasury exited its Citigroup stake and concerns about Bank of America's industry-leading exposure to subprime mortgage litigation moved to the fore, Citi began to outperform Bank of America. From Sept.1 2010 through the end of 2011, a particularly rough period for big U.S. bank stocks, Bank of America shares lost 56% vs. a 27% loss for Citigroup. When the tide turned, however, in 2012, Bank of America led the way by a large margin. Its shares more than doubled that year. In 2013, however, Bank of America shares have been less predictable in their performance. From the start of the year through May 21, as the S&P 500 rose 17% and was bested by Goldman, Morgan Stanley, JPMorgan, Citi and Wells, Bank of America lagged slightly, rising 15.75%. However, from May 22 through Friday, Bank of America shares lost 2.97%, slightly worse than the S&P and better only than Citigroup (-5.20%) and Goldman Sachs (-4.20%). In other words, Bank of America is suddenly a laggard in good times and bad. Most analysts believe Bank of America has put its mortgage-related legal troubles behind it. Still, many have expressed concerns about the bank's ability to find revenues given that it had to sell so many assets in order to shore up its balance sheet against mortgage-related losses. "We believe the challenge of reducing expenses while maintaining revenues will keep shares range-bound in the near term," wrote FBR Capital Markets analyst Paul Miller in an April 18 report following the bank's first-quarter earnings release. However, Richard Bove, analyst at Rafferty Capital Markets, doesn't share this concern.