Short Interest in Solar, Alt Energy Stocks Mixed

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Short interest moves among solar and alternative energy stocks were mixed during the two-week reporting period that ended on August 31. Of the companies we watch, short interest rose on two of three solar stocks and on half of the four alternative energy stocks.

First Solar Inc. (NASDAQ: FSLR) saw short interest increase by 1% to 11.16 million shares, which represents about 14.5% of the company’s float. Days to cover rose from seven to eight. In the two-week short interest period, the stock’s share price dropped by about 3.9%. Its 52-week range is $25.56 to $50.21, and it closed at $47.48 on Tuesday, up about 0.7% for the day.

SunPower Corp. (NASDAQ: SPWR) short interest decreased by 12.2% to 13.41 million shares or 22.7% of the company’s float. In the short interest period to August 31, the share price fell by about 6.8%. The stock’s 52-week range is $5.84 to $11.70, and it closed at $8.43 on Tuesday, up about 0.8% for the day. Days to cover rose from four to seven.

Canadian Solar Inc. (NASDAQ: CSIQ) saw a decrease of 0.8% in short interest during the two weeks. Some 12.4% of the total float, or 5.5 million shares, were short, and days to cover rose from four to five. The company’s share price dropped by about 5.6% in the period, and shares closed Tuesday at $16.50, down about 0.9% for the day, in a 52-week range of $10.25 to $18.12.

FuelCell Energy Inc. (NASDAQ: FCEL) posted an increase of 10.7% in short interest during the two-week period. Some 7.11 million shares were short as of August 31. The stock closed at $1.50 on Thursday, unchanged for the day, in a 52-week range of $1.22 to $5.67. Shares added about 5.5% in the short interest period, and days to cover rose from nine to 15.

Plug Power Inc. (NASDAQ: PLUG) saw short interest rise by 0.8% to 41.2 million shares. Days to cover rose from nine to 20, and about 19% of the company’s shares were short. In the latter two weeks of August, the share price rose about 0.5%. The stock’s 52-week range now is $0.83 to $2.70, and shares closed Tuesday at $2.17, unchanged for the day.

Clean Energy Fuels Corp. (NASDAQ: CLNE) saw a decrease of about 7.3% in short interest to 9.76 million shares. About 7.6% of the company’s float was short, and days to cover rose from eight to 12. The share price rose by about 1.3% between the settlement dates. The stock closed at $2.46 on Tuesday, down about 1.2% on the day, in a 52-week range of $2.18 to $4.62.

Pacific Ethanol Inc. (NASDAQ: PEIX) saw short interest rise by 5.1% in the period to 1.16 million shares, or about 2.7% of the company’s float. Days to cover rose from one to two. The stock price added about 2% in the two weeks to August 31. Shares closed at $5.20 on Tuesday, unchanged on the day, in a 52-week range of $4.15 to $10.95.