How the Stock Might React to the NewsTesla Event Today: EV Maker Launches New Models Under $40KLast Updated:17 hours agoThere really is no hard and fast rule of thumb to project how Tesla stock reacts to news about products product or investor events.It depends on what the company says and how the stock has been performing. The movement of the overall market, of course, matters too.All investors can do is arm themselves with some historical context.