FuelCell Energy Inc. (NASDAQ: FCEL) posted a decrease of 7.1% in short interest during the period. Some 7.16 million shares were short as of June 15. The stock closed at $1.30 on Monday, up 8.3% for the day, in a 52-week range of $0.80 to $6.44. Shares jumped 14% in the short interest period, and days to cover rose from seven to eight.