"I'm a bit perplexed by the timing as well. Some are speculating a morning PR. But that negates the need for a call. It is odd."

I'm of the same mindset. I don't recall a mid-day investors call like this one where we're expecting major news. I think they're trying to get the best bang for the buck, and knowing most people expect they'll announce the BLA has been submitted, perhaps they're trying to give the sp time to make a run before an expected short attack on Tuesday. Or maybe they have more news they're holding back for a Tuesday morning PR and they don't want to combine the two. I guess time will tell.