ExOne and Stratasys combine for about 2% of ROBO’s weight. The three aforementioned stocks are up an average of 31.3% since the start of June, explaining why ROBO is up nearly 7% over that time.

Faro Technologies (NasdaqGM: FARO), Dassault Systems (OTCBB: DASTY) and Arcam (OTCBB: AMAVF), all 3D printers, combine for another 3% of ROBO’s weight. [Almost a 3D Printing ETF]

The bottom line is ROBO is something of a unique concept among ETFs. Perhaps it can even be called “odd” depending upon the person doing the describing. And no, ROBO probably is not suitable for every investor’s portfolio, but the ETF remains a decent way of getting some leverage to the 3D printing trade.

Robo-Stox Global Robotics & Automation Index ETF