Short interest in the two-week period ending October 31 rose for two of the four 3D printing companies we follow. Year to date, share prices are down more than 60% for all but one of these stocks. During this two-week reporting period, share prices rose for three of the four. Short sellers see the two leading companies in the space as the best bets for near-term profits.

Short interest in 3D Systems Corp. (NYSE: DDD) rose 8.9% to 36.62 million shares. Some 35% of the company’s stock is short. Days to cover fell to 8.5. In the two-week short interest period to October 31, the share price fell 8.3% and is down about 63% for the year to date as of Tuesday’s close. The stock’s 52-week range is $33.80 to $97.28, and shares closed at $34.61.

Stratasys Ltd. (NASDAQ: SSYS) saw short interest rise 8.4% in the past two weeks of October to 6.27 million shares, or about 14.4% of the company’s float. Days to cover rose to six. Shares rose about 8.7% in the two-week period and closed at $102.08 on Tuesday night. The stock’s price has dropped about 24% for the year to date. The stock’s 52-week range is $85.30 to $138.10.

Short interest in The ExOne Co. (NASDAQ: XONE) fell 11.1% to 4.41 million shares. About 48.6% of the company’s shares are now short. Shares of ExOne jumped nearly 27% in the two-week period and closed at $20.65 on Tuesday night, down about 66% year to date. The stock’s 52-week range is $16.00 to $70.25, and days to cover rose to seven.

Voxeljet A.G. (NYSE: VJET) saw short interest drop 6.2% to 3.07 million shares, with days to cover rising to 12. Year to date, shares are down about 69% and they rose more than 9% in the two-week period to October 31. The stock closed at $12.10 in a 52-week range of $11.51 to $70.00.

ALSO READ: Why Analyst Still Thinks 3D Systems Is Bottoming

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