Adtran (ADTN -4.5%) is off after receiving a downgrade to Sell from Citi, which cites...

Adtran (ADTN -4.5%) is off after receiving a downgrade to Sell from Citi, which cites "challenges" in the company's wireline access business. That business has strong exposure to legacy technologies such as T1 and T3 lines, as well as to the soft wireline capex budgets of U.S. carriers. Adtran tumbled in September and October on poor guidance.