This is the final installment in our four-part serialization of a treatise chapter by Steven W. Rabitz, partner at Stroock & Stroock & Lavan, and Andrew L. Oringer, partner at Dechert. The chapter describes the substantive considerations – as well as potential penalties for missteps – associated with employing swap transactions for employee benefit plans, certain other similar plans and “plan assets” entities subject to the fiduciary provisions of the Employee Retirement Income Security Act of 1974 (ERISA) or the corresponding provisions of Section 4975 of the Internal Revenue Code of 1986, and includes references to a wide range of relevant authority. This article examines issues relating to cleared swaps, collateral, rehypothecation and swap execution facilities. The third article in the serialization described implications of funds reaching the 25 percent threshold of plan investment; considerations for fund managers when facing governmental plans; and credit-related issues. The second article discussed exemptions that could keep swaps from being considered prohibited transactions and explored the extent to which swap counterparties and others would be considered fiduciaries under ERISA, as well as the potential implications of that consideration. The first article explored fiduciary responsibility and prohibited transactions generally.