Observations

2026-08-27: 5.919

Updated: Aug 28, 2026 7:02 AM CDT

Units:

Percent,

Not Seasonally Adjusted

Frequency:

Daily

Notes

Title	Release Dates

15-Year Fixed Rate Conforming Mortgage Index	2020-07-13	2026-08-27

Source

Optimal Blue	2020-07-13	2026-08-27

Release

Optimal Blue Mortgage Market Indices	2020-07-13	2026-08-27

Units

Percent	2020-07-13	2026-08-27

Frequency

Daily	2020-07-13	2026-08-27

Seasonal Adjustment

Not Seasonally Adjusted	2020-07-13	2026-08-27

Notes

Optimal Blue Mortgage Market Indices (https://www2.optimalblue.com/obmmi/)™ (OBMMI™) is calculated from actual locked rates with consumers across over one-third of all mortgage transactions nationwide. OBMMI includes multiple mortgage pricing indices developed around the most popular products and specific borrower and loan level attributes. Each index is calculated as the average of all appropriate rate locks locked through the Optimal Blue product eligibility and pricing engine on a given day. More details about methodology and definitions are available here (https://www2.optimalblue.com/obmmi/).	2020-07-13	2026-08-27

Release Tables

Optimal Blue Mortgage Market Indices