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I am not an expert, so take my opinion with a grain of salt. I think this falls into a bit of a gray area. One comment on a technical forum in response to an article where Axion Power was explicitly mentioned is probably OK. If the GP had a pattern of posting comments like this in many places, particularly investment forums, and under different usernames, it would be illegal market manipulation. Moreso, if that person was found to have bought, posted the comments, and then sold shortly after the market had gone up.

The information is public and not misleading.

More information can be found on Seeking Alpha via John Petersen's articles or the shareholders' blog at http://seekingalpha.com/instablog/1631091-axion-power-host/2...

If the OP works for the company or is a stock promoter it might break some rules. Talking about your own investments (even hyping them) is not against any rules. The Internet is awash in stock forums.