Nonbanks drive agency ARM increase as borrower leverage grows

Why this matters

The resurgence of agency adjustable-rate mortgages (ARMs), led by nonbank lenders and more leveraged borrowers, signals a notable shift in the US housing finance landscape with implications for institutional real estate capital. While ARMs have historically been a smaller slice of agency originations, their reemergence suggests growing borrower appetite for rate structures that initially offer lower payments but carry reset risk. Nonbank lenders, less constrained by traditional bank capital and regulatory frameworks, appear willing to underwrite higher leverage profiles, potentially filling a financing gap left by more cautious bank lenders amid tighter credit conditions. For institutional investors, this trend underscores a bifurcation in capital flows and risk tolerance within the mortgage market. The increased role of independent mortgage banks in driving ARM originations may reflect a recalibration of risk premia and a search for yield in a rising-rate environment. However, the growing leverage among borrowers also raises questions about credit quality and the potential for volatility in mortgage performance, especially if interest rates rise further or housing fundamentals soften. Overall, this development merits close attention as it may presage shifts in lending standards, borrower behavior, and ultimately the stability of agency-backed mortgage pools that underpin a significant portion of multifamily and single-family rental financing.

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