IMO...most of that volume was from the tweet sent out by stockaholics. Many of those guys sold the second day. There are always traders as well. I would not be too concerned about the day to day trading unless there is obvious large dumps on the bid. Yesterday was all retail IMO. I don't see any dilution. I guess you could say it is a retail trader slowly selling his/her position by keeping this facade going....but that's a stretch. I actually like the recent liquidity.
Let's hope GM gets the attorney letter filed soon and the Q2 report on time...not likely but hopeful none the less.