It's official. Risk retention became effective for residential mortgage-backed securities (“RMBS”) on December 24, 2015. Since the final rules (the “Rules”) were issued, there has been a lot of talk throughout the broader securitization industry regarding risk retention structures. There are unique considerations for various asset types. What is patently obvious is that there is no one-size-fits-all solution to risk retention. Solutions must be structured to fit the unique platform needs of the individual securitization sponsors. Even within asset classes, variation will be the norm. This article recaps some of the risk retention requirements for RMBS and highlights some unique considerations for the RMBS industry.