MCT launches live mortgage rate index showing 1.79-point builder gap

Mortgage Capital Trading has launched a Live Mortgage Rate Lock Index that updates throughout the day using real borrower lock data. The index shows builder-financed buyers are seeing rates 1.79 percentage points below non-builder buyers, a gap MCT says standard averages can obscure.

Why it matters: - The new index gives lenders, builders and investors a live benchmark based on actual locked loans, not surveys or models. - The 1.79% spread between builder and non-builder buyers points to how much buydowns and builder incentives can move real purchase pricing. - MCT is making the index free to the industry and public, which could widen access to faster mortgage market signals.

What happened: - Mortgage Capital Trading, Inc. launched its Live Mortgage Rate Lock Index on Aug. 11, 2026. - The index compares mortgage rates for buyers financing through homebuilders with rates for buyers not using builders. - MCT said the first reading shows a 1.79% gap between the two groups. - The company also said a live Lock Volume Index is expected soon. - MCT said the index is available now and can be embedded on other websites as a live widget.

The details: - The index is built from weighted-average borrower note rate locks submitted through MCTlive! and updates during the business day as new locks come in. - MCT said the data comes from actual locks, not applications, quotes, surveys or models. - The underlying activity spans independent mortgage banks, banks and credit unions. - Those lenders originate a combined average of $9.4 billion in monthly volume across all 50 states. - The footprint covers retail, wholesale, correspondent and consumer-direct channels. - The index tracks 30-year conventional and FHA purchase loans for owner-occupied properties. - Builder and non-builder series are reported separately, and the spread between them is shown. - Values are finalized at the close of business. - Trend charts and high-low ranges are calculated from completed days only. - MCT said the index values are informational only and are not a rate quote, credit offer or investment, pricing or hedging advice. - MCT also said the values reflect market-wide averages and may not match pricing on any individual loan. - More information is available through MCT's contact page.

Between the lines: - The launch is designed to challenge the way headline mortgage rates are usually presented, since weekly survey averages can blur differences between borrower types. - Separating builder-affiliated locks from everyone else gives the market a clearer read on where incentives are changing actual consumer rates. - A live, production-based benchmark could become useful for pricing, hedging and competitive analysis if lenders adopt it broadly.

What's next: - MCT plans to add the Lock Volume Index soon. - The company is encouraging originators, lenders and publishers to embed the live widget on their own sites. - The index may give market participants a faster reference point as mortgage conditions change through the day.

The bottom line: - MCT is betting that real-time lock data will tell the mortgage market more than delayed survey averages do.