The CEO better come up with something the public doesn't know or this still will sell-off. Everyone is expecting some important news to stable this stock. If he doesn't deliver there will be massive sell-off to under $6.
I don't think your assumption is right. The Keryx team had now two more weeks to work with the data. Even if there are not spectacular new insights the fact of more time to look at the data will strongly support their validity and the correctness of the Jan 28 announcement. This is very encouraging.