investingdog, there is nothing of the sort going on AT ALL! If your leak theory is correct then all the people hearing the leaked information should have PPHM shares to sell. These are no trader and don't short stock.
About the 15/25% improvement! Some companies dance on the table if they have 10% improvement, certainly in a hard to cure cancer like NSCLC. Why wouldn't 15 to 25% not be a good result then?
But OK if you have higher hopes then be my guest and prepare the setting for a possible disappointment. Not all clinical trials of PPHM are going to score 60% improvement like 2nd ln NSCLC that would be totally miraculous. Even realizing such a score once is a small miracle. I prefer to set the setting for a possible surprise and stay realistic. 15+% is what we need, about 20/25% is what I expect, 50% is what I hope for and in case of 50+% you know what I do with the champagne.