Tesla stock surged again this week, this time by more than 8% to set a new price record of $1,228. If you were Elon Musk, you’re likely already hard at work on a sick new club track to celebrate — but those who’ve bet against it are probably pissed. Thursday’s Tesla pump not only solidified its position as the world’s most valuable car company, it also meant its chief exec Musk has added $20 billion to his wealth since March.