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News Breaks March 22, 2013 07:33 EDT ADTN Adtran upgraded to Market Perform from Underperform at Raymond James News For ADTN From The Last 14 Days Check below for free stories on ADTN the last two weeks. Sign up for a free trial to see the rest of the stories you've been missing. There are no results for ADTN Sign up for a free trial to see the rest of the stories you've been missing.