A planned amortization class whereby a REMIC security is created in order to receive cash flows from a pool of underlying mortgages that secure the REMIC. These tranches have a structure that is similar to that of a sinking fund in order to set up a fixed schedule of payments.
Related information about PAC tranche:
- Planned Amortization Class (PAC) Tranche Definition | Investopedia
 A class of tranche in a planned amortization class (PAC) bond that receives a   primary payment schedule. As long as the actual prepayment rate is between a ...
 
- The Various Types of CMOs
 With a PAC tranche, the yield, average life, and lockout periods estimated at the   time of investment are more likely to remain stable over the life of the security.
 
- Collateralized mortgage obligation - Wikipedia, the free encyclopedia
 The PAC tranche will receive whichever rate is lower, so it will change ... For   example a $100mm PAC tranche off 6% collateral with a 6% coupon ('6 off 6' or ...
 
- What is PAC tranche? definition and meaning
 Definition of PAC tranche: A planned amortization class whereby a REMIC   security is created in order to receive cash flows from a pool of underlying   mortgages ...
 
- Planned Amortization Class (PAC) Tranche: Definition from Answers ...
 Planned Amortization Class (PAC) Tranche A class of tranche in a planned   amortization class (PAC) bond that receives a primary payment schedule.
 
- Collateralized mortgage obligations (CMOs) - Wells Fargo Advisors
 A PAC tranche uses something like a sinking fund in a fixed principal-payment ...   away from the PAC tranche and toward a “companion” or “support” tranche.
 
- ANSWERS TO END OF CHAPTER QUESTION
 with a WAM of 340 months or (ii) a PAC tranche of a Freddie Mac CMO issue ...   has been mitigated by the creation of a planned amortization class (PAC) tranche ...
 
- REMIC Structures - Ginnie Mae: For Investors
 A useful analytical tool for assessing the stability of a PAC tranche is the "effective   band", which measures the range of constant prepayment speeds that will ...