MFA Financial, Inc. operates as a Real Estate Investment Trust (REIT) primarily focused on acquiring residential mortgage assets, employing a leveraged investment strategy. Its portfolio encompasses various types of mortgage-related instruments, including both agency and non-agency mortgage-backed securities, alongside residential whole loans. The company's activities are organized into two primary divisions: the Mortgage-Related Assets segment, which manages its extensive investment holdings, and the Lima One segment, dedicated to its distinct mortgage origination and servicing enterprise.