not to mention you have no evidences of MTG obtaining insider information which I even don't bother to talk about.
Although on theory illegal insider trading activities can be either buying or selling, in reality all well known illegal insider trading activities are selling stocks before the stocks fall. A good example is Nancy Pelosi. Her husband unloaded Visa stock worth between $500,000 and $1 million just one day before DOJ sued Visa company and the company's stock fell. When you sold stocks you profit or avoid loss timely from insider information, which provides ground to be suspected. When you hold or even add to your position by buying, you don't make profit and actually risk losing your investment in the future.
So, please do us a favor. I know you like googling. Find a case of insider trading illegal because of buying stocks. If you couldn't find, could you just shut up and move on?