the problem is that you have a lot of traders buying and selling based on emotion and not logic. ever heard of rumor of a buy out, yeah, price goes sky high. so if there is some kind of a conflict in Saudi Arabia, let's say ISIS blew up an oil reserve, you will see this stock and other oil relate stocks go up.
My company owned HP printing from the most expensive to the cheapest, they were all junk, I bet that HP 3D printing will be the same, which is kind of like the story of 3D printer's quarterly report. same old sh1t.
take SodaStream for example, it came out with lousy preliminary report for every quarter since fall 2013, and I've not seen it raised guidance since then, the way I see it is that company with bad pre-report will never, ever raise guidance. I bought in this DDD stock at high high, I'm just gonna have to stick with it 'til death.