A recent notice in the Federal Register is the latest step by the Federal Retirement Thrift Investment Board to clamp down on frequent trading in TSP funds. The notice makes the argument that the restrictions are necessary to protect the interests of the majority of TSP investors whose financial investments are being put at risk by the actions of those trying to time the market and forcing all TSP participants to accept additional financial risk they did not anticipate. A press release from a group opposed to the changes states that the cost of trading for each TSP shareholder has declined despite the market timing activities of some TSP participants.