There has been considerable debate over regulated organ markets. Especially current markets, where people sell one of their kidneys while still alive, have received increased attention. Futures markets remain an interesting and under-discussed alternative specification of a market-based solution to the organ shortage. Futures markets pertain to the sale of the right to procure people’s organs after they die. There is a wide range of possible specifications of the futures market. There are, however, some major unaddressed efficiency concerns. This article (...) presents this class of concerns and discusses the implication for organ futures markets. It identifies a number of inefficiency sources pertaining to crowding out, bad organs, costs and missed opportunities, family refusals, moral hazard and strength of the provided incentive. However, a complete assessment of futures market requires better knowledge regarding the potential reaction from donors, families and health professionals. (shrink)