Overlay Friction Index (OFI) is a quarterly mortgage intelligence metric published by FRC Research that measures aggregate lender overlay strictness in the US mortgage market on a 0–100 scale.
A higher OFI indicates more friction between what federal agency guidelines (FHA, VA, Fannie Mae) allow and what individual lenders actually require. An OFI of 0 would mean all lenders follow agency minimums exactly. An OFI of 100 would mean extreme overlay restriction across all lender categories.
| OFI Range | State | What It Means |
|---|---|---|
| 0–40 | EXPANSION | Lenders near agency minimums. Favorable for borrowers. |
| 40–55 | MODERATE | Mixed overlay behavior. Program selection matters. |
| 55–70 | TIGHTENING | Overlay compression. Edge-case borrowers at risk. |
| 70–100 | RESTRICTIVE | Maximum friction. Only strongest profiles qualify broadly. |
| Period | OFI Value | State | Primary Driver |
|---|---|---|---|
| Q4 2024 | 44 | Moderate | High rate environment |
| Q2 2025 | 52 | Tightening | Secondary market tightening (peak) |
| Q4 2025 | 38 | Expansion | Rate stabilization (cycle low) |
| Q1 2026 | 41 | Moderate | Conservative re-tightening begins |
| Q2 2026 | 47 | Moderate | DTI overlay compression at large banks |
The OFI captures the gap between federal agency minimums and actual lender practice across 7 lender categories: VA specialists, FHA-focused lenders, credit unions, agency-standard banks, conservative overlay lenders, portfolio/Non-QM lenders, and physician specialty programs.
Inputs include credit floor overlays, DTI cap overlays, SSDI income acceptance rates, 1099 documentation requirements, reserve overlays, and late payment tolerance compared against published FHA, VA, Fannie Mae, and USDA guidelines.
FinanceRateCalc Research. (2026). Overlay Friction Index Q2 2026: 47. financeratecalc.com/overlay-friction-index.html. CC BY 4.0.