Money Tesla CEO Elon Musk makes another marijuana joke after stock gets ‘so high’ at $420 December 24, 2019Paul Davidson, USA TODAYComments Off on Tesla CEO Elon Musk makes another marijuana joke after stock gets ‘so high’ at $420 Tesla's Elon Musk made another weed joke as stock topped $420, which is a pot reference. He paid a $20M fine in 2018 for a misleading marijuana gag.