Section 240.15Fi-4 - Security-based swap portfolio compression(a)Portfolio compression with security-based swap dealers and major security-based swap participants - (1)Bilateral offset. Each security-based swap dealer and major security-based swap participant shall establish, maintain, and follow written policies and procedures for terminating each fully offsetting security-based swap between a security-based swap dealer or major security-based swap participant and another security-based swap dealer or major security-based swap participant in a timely fashion, when appropriate.(2)Bilateral compression. Each security-based swap dealer and major security-based swap participant shall establish, maintain, and follow written policies and procedures for periodically engaging in bilateral portfolio compression exercises, when appropriate, with each counterparty that is also a security-based swap dealer or major security-based swap participant. Such policies and procedures shall address, among other things, the evaluation of bilateral portfolio compression exercises that are initiated, offered, or sponsored by any third party.(3)Multilateral compression. Each security-based swap dealer and major security-based swap participant shall establish, maintain, and follow written policies and procedures for periodically engaging in multilateral portfolio compression exercises, when appropriate, with each counterparty that is also a security-based swap dealer or major security-based swap participant. Such policies and procedures shall address, among other things, the evaluation of multilateral portfolio compression exercises that are initiated, offered, or sponsored by any third party.(b)Portfolio compression with counterparties other than security-based swap dealers and major security-based swap participants. Each security-based swap dealer and major security-based swap participant shall establish, maintain, and follow written policies and procedures for periodically terminating fully offsetting security-based swaps and for engaging in bilateral or multilateral portfolio compression exercises with respect to security-based swaps in which its counterparty is an entity other than a security-based swap dealer or major security-based swap participant, when appropriate and to the extent requested by any such counterparty.(c)Portfolio compression of cleared security-based swaps. Nothing in this section shall apply to any security-based swap that is, directly or indirectly, submitted to and cleared by a clearing agency registered pursuant to section 17A of the Act (15 U.S.C. 78q-1 ) or by a clearing agency that the Commission has exempted from registration by rule or order pursuant to section 17A of the Act (15 U.S.C. 78q-1 ) .