Tell me how the heck this happens. UNG happily tracks the same kind of movement, the same magnitude swings during the demise of natural gas in the last year. Now, when natural gas doubles with nearly 100% gain in what seemed like a nanosecond, UNG sits with only a 36% gain. Where's the other 64%? Even in the short term, how could anyone do anything but short these stupid etfs? I mean, look at the nat gas spike on the left, and the fizzle on the right. UNG should be anywhere from 17-20/share. WTF, I want the double that I deserve by buying UNG at $9.10.