Tuesday is Tesla’s “Battery Day”, and a few investors expect Chief Executive Elon Musk’s pitch on the electric car maker’s energy storage advance’s to re-power its rally following a recent 21% stock fall.

Tesla’s stock has increased in current sessions ahead of the event organized on Tuesday after the close on trading. A lot of analysts anticipate Musk’s unveil of battery advancements extending the Palo Alto, California automaker’s surpassing General Motors (GM), Volkswagen (VOWG_p) and other competitors. 

Tesla options are pricing in a stock move of roughly 17% -up or down- by Friday, stated co-head of derivatives strategy, Christopher Murphy at Financial Group.