the market absolutely hates this deal for GSK... The reason is that the deal won't be accretive to GSK's EPS until 2022 at the earliest. GSK essentially got out of oncology in 2014—just as the sector was heating up. So, now they may be overcompensating to some degree in getting back in. Still, PARP inhibitors have a lot of upside, so I can’t say for sure that this deal is a mistake.