The powerhouse American private equity firm KKR has ruled out a bid for NMC Health only a day after the troubled private hospitals group said that it had been approached. Shares in the healthcare company fell by 16 per cent, or 148p, to 778¼p yesterday after KKR said that it had “not made a proposal, nor discussed with NMC the terms of any possible offer” and that it did not intend to make a bid. NMC said on Monday that it had received “highly preliminary approaches” from both KKR and a little-known investment vehicle called GK Investment Holding, sending its shares up by 32 per cent. The disclosure was a bright spot on an otherwise calamitous day for NMC after it made the extraordinary admission