From New York to Tokyo, global investors and retail traders are glued to their screens on Friday waiting for Elon Musk’s SpaceX, the largest initial public offering, to start trading. “The atmosphere is electric! It feels just like it does when tip off is kicking off for a Knicks playoff game,” , global head of equity trading at Stifel Nicolaus said by phone in New York. “It’s like the calm before the storm.