Tesla stock falls after Elon Musk tweets that a deal with Hertz is not signed
Tesla's market value hits $1 trillion after Hertz agrees to buy 100,000 of its cars
Hertz will buy 100,000 Teslas, marking a big bet on electric vehicles in rental cars
Tesla's Musk dials into Volkswagen executive conference
Tesla says it's moving its headquarters to Austin
9 in 10 cars now being sold in Norway are electric or hybrid