Stratasys Ltd. (NASDAQ: SSYS) saw short interest fall by 5.2% in the first two weeks of October to about 7.57 million shares, or 15.1% of the company's float. Days to cover fell from 20 to 18. The share price retreated by 12% in the period, and the stock closed at $19.79 on Wednesday, down about 3.3% for the day, in a 52-week range of $17.17 to $26.17.