I called the below contact number and it appeared the older person I spoke with had no idea what caused the rise in stock price. They weren't sure if they were reporting earnings or not and patched me through to a voicemail (extension 13 if memory serves me correctly). I called the investor relations folks and they stated they no longer work for High Plains Gas. Interesting. Again, this is just my personal opinion and no one should consider it as anything more than opinion; suggest you do your own homework on this one.
SS1
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High Plains Gas, Inc. 3601 Southern Drive Gillette, WY 82718