Stocks Hitting 52-Week Lows

Terra Nitrogen Company LP TNH shares tumbled 5.83% to reach a new 52-week low of $162.21. Terra Nitrogen shares have dropped 20.23% over the past 52 weeks, while the S&P 500 index has gained 29.66% in the same period. BlackBerry BBRY shares tumbled 2.36% to reach a new 52-week low of $6.28. BlackBerry's trailing-twelve-month ROE is -10.54%. American Superconductor AMSC shares declined 3.19% to touch a new 52-week low of $1.82 after the company announced new term loan and "At-The-Market" issuance program. bluebird bio BLUE shares fell 5.49% to touch a new 52-week low of $17.90. bluebird bio's trailing-twelve-month operating margin is -323.09%.