June 5 : SpaceX's entry into the S&P 500 will take longer after S&P Dow Jones Indices declined to relax rules for megacap IPOs, delaying billions in passive fund inflows from the potential inclusion. The decision keeps several barriers intact. To join the S&P 500, a company must trade publicly for at least 12 months, be profitable under U.S. accounting standards and hold a free float of at least 10 per cent. SpaceX, expected to debut on June 12, meets none. The company that runs the S&P 500