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Short interest in the two-week period ending March 31 fell for all four of the 3D printing stocks we follow. The previous period saw share prices for the 3D printing stocks mostly fall, and the decline continued for the recent period as well.

These stocks tend to move as a group as far as short interest is concerned, and the next event that is likely to move short sellers is the first earnings report for one of them, currently set for later this month.

Short interest in 3D Systems Corp. (NYSE: DDD) fell 0.3% to 38.5 million shares. Some 36.5% of the company’s float is short. Days to cover rose to 22. In the two-week short interest period to March 31, the share price fell about 1.5%. The stock’s 52-week range is $26.29 to $69.56, and shares closed at $29.79 on Friday. 3D Systems is scheduled to release its earnings on April 27.

Stratasys Ltd. (NASDAQ: SSYS) saw short interest decline 4.8% in the final two weeks of March to about 10 million shares, or about 22.3% of the company’s float. Days to cover remained at 10. The share price fell about 11.2% in the two-week period. The stock closed most recently at $57.06, and the 52-week range is $51.50 to $130.83.

Short interest in The ExOne Co. (NASDAQ: XONE) fell 1.5% to 3.52 million shares. About 39% of the company’s shares are now short. Shares of ExOne fell about 5.7% in the two-week period. The stock’s 52-week range is $13.19 to $48.66, and shares closed at $15.72 on Friday. Days to cover rose to 12.

Voxeljet A.G. (NYSE: VJET) saw short interest fall 4.2% to 1.99 million shares, with days to cover falling to 11. The share price fell about 5.7% in the two-week period to March 31. The stock ended last week at $9.15, in a 52-week range of $7.13 to $27.41.

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