TheStreet -- BioCryst Pharmaceuticals’ stock price has been falling for some very obvious reasons: (1) Requests from doctors for its H1N1 flu drug peramivir has been weaker than expected; (2) H1N1 flu activity in the U.S. has been on the wane; (3) foreign governments have not yet purchased large stockpiles of peramivir; and (4) BioCryst pushed through a five million-share, discounted stock offering despite evidence that demand from institutional investors wasn’t all that high.