SpaceX's IPO is expected to create intense pressure on professional investors to participate, even at a valuation north of $1T, simply because sitting out may be too risky, The Information's reports. That urgency has only grown after Nasdaq approved rule changes allowing very large companies to join its major index just 15 days after listing, which is far sooner than the previous three month wait and float requirements. Fund managers fret that if they sit out the SpaceX offering and the shares soar, their performance will look dismal. Musk and his bankers are well aware of the buying pressure they're putting on fund managers, with a record $75B worth of stock to sell. $Tesla(TSLA.US)