3D High-flyer ExOne Co (XONE) Targeted By Short-seller

After losing more than half its value in just five months, ExOne Co (NASDAQ:XONE) had a spectacular bull run in June, and a particularly sharp rise on July 1, that left analysts scratching their head. The 3D printing company had falling revenues, rising losses, and fewer machine sales while market sentiment was turning against the entire sector. Now a pair of SEC filings (caught by Copperfield Research) both explain the recent rally and raise questions about who was behind it. Pair of SEC filings difficult to explain Early on July 7 a group of investors made up of Novel Century Ventures…