The proposed solution is to let big companies in after just 15 trading days, and swap the 10 per cent threshold with a sliding scale, among other changes. This would benefit Musk, because index-tracking funds might buy SpaceX sooner and IPO investors would pay more for the shares as a result. It’s good for Nasdaq the bourse, since it makes Musk more likely to go there rather than the New York Stock Exchange. While the index-compiling bit is separate, what’s good for the exchange helps it too.