Let's not kid ourselves. Tesla is down because they had a terrible Q1, and now institutional investors are scared.
They're less scared now that Tesla has abundant cash on hand. But they need to prove that they can get back on the growth path. Tesla was up in Q4 because they had "turned the corner" to sustained profitability. They need to show, "Hey, we're back on track." to see those SPs again.
April was a pretty good start. If May numbers show sustained or growing Model 3 numbers vs. April, and a surge in S/X from the new model variants (assuming Tesla can produce them fast enough), that'll be more confidence that things are turning around. Then come official deliveries numbers at the start of July, and then (most likely late July) the Q2 ER. Each of these are important steps to show that things are back on track. At any point in that timeperiod, signs of high hiring / increasing shifts / etc will also work towards restoring said confidence.
As a side note, I hope that the pickup isn't until after at least deliveries, and preferably the ER. I want sentiment on Tesla to be improved before yet another product is added to the TODO list. Otherwise the response will be, "Yeah, it's great, but they have too much to do already with too little resources."
ED: Come to think of it, we may not see a real S/X surge until June. I mean, it's the 7th already, and AFAIK, nobody has gotten a revised S/X yet. Has anyone even gotten a delivery date yet?