They are reshaping Wall Street’s ecosystem. : “SELL in May and go away,” say the denizens of Wall Street, and to the usual summer lethargy is added the excuse of a heatwave. But for those working in private equity, there is no let-up. The “shops”, as private-equity funds like to call themselves, are stuffed with money and raising more: $1.1trn in “dry powder” ready to spend around the world, according to Preqin, a consultancy, with another $950bn being raised by 3,050 firms. So hot is the market that there are rumours of money being turned away.