bamich, one can't compare the likes of DDD, XONE (3-D printers) or any other stock, MTLS is a different bird in the 3-D printers. The way & why MTLS Daily changes (note "Opening & Closing" PPS) The PPS can change (w/no Vol at any time because of the Market Makers (computers set the Bid/Ask at their whim, most of the big swings happen early am & late pm, ) a trade is made for the guys lunch money. Some day when more shares are available for trading this should change, until then we have to live with this situation (sad but true) we have, unless the Company whats to pursue the mater at hand..
I've also accumulated 2x the shares you have over time, MTLS is a very well run company, hope in 2 years we will reap a healthy profit. GLTA & hold, Count.