Is there any knowledgeable market analyst around, to keep us informed about that ?
This is a graph from moneycentral.msn.com:
While MSFT indeed had a small price drop lately, I doubt that it is significant, and I don't think that there is a strong connection to this issue as the timing is off. The market analysts seem not to have reacted much to the press around the OOXML process. It's business as usual, MSFT is not really expected to behave in an ethical manner or play fair. While a strongly negative public opinion would probably make the stock market respond, we are not there yet. This is still a relatively small issue on a global scale. Furthermore, it is not certain that a public outcry over unethical behavior would make the stock price drop. It might well be that investors interpret unethical actions as "strong market decisions", and the price goes up instead.