This book provides a definition and classification for Sovereign Wealth Funds (SWFs) and discusses its phenomenon within the law context. It identifies the rules applicable to SWFs and to states hosting SWFs' investments. In eight extensive chapters, Fabio Bassan considers whether SWFs may enjoy immunity with respect to host state measures, and whether SWFs can use alternative forms of protection in Bilateral Investment Treaties. Written from an international law perspective, The Law of Sovereign Wealth Funds will appeal to students of international business, international organisations, banks and governments.