
Agency vs. Non-Agency
Guarantees from Ginnie Mae, Fannie Mae, and Freddie Mac determine credit risk exposure and investor yield expectations for mortgage-backed securities.
Read more →The core concepts section breaks down the foundational mechanics of the secondary mortgage market using real-world structures—not theory. Here, you’ll find clear explanations of how loans are grouped, guaranteed, sliced, and modeled to create investable securities, with emphasis on how each element shapes risk, pricing, and market behavior. All content is grounded in standard industry practices documented in official securitization structures and regulatory disclosures.

Guarantees from Ginnie Mae, Fannie Mae, and Freddie Mac determine credit risk exposure and investor yield expectations for mortgage-backed securities.
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Loan pools consolidate mortgages with matching attributes like coupon, amortization, and vintage to form predictable cash flow units for securitization.
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Tranches partition cash flows and losses across risk tiers—senior, mezzanine, equity—so investors select exposure aligned with their risk tolerance and strategy.
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The PSA model translates real-world prepayment speed into a standardized % of the 100% CPR baseline, enabling consistent cash flow projection across securities.
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