I don't think Battery Day will be a typical buy the rumor sell the news scenario. This is not a simple case with an expected result, like an earnings report or delivery count. There will be numerous and generally unexpected announcements, maybe updates on semi and roadster, new model S & X, and all the battery advances. I'm sure there will be at least a few big things most people didn't expect. That should cause a stock surge on Wednesday. I'm expecting a spike over 500, at least temporarily.