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Mortgage-backed securities · October 8, 2026
MBS Prices Today
The UMBS proxy, its momentum versus the moving averages, and what it means for rates. Updated October 8, 2026.
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Market Eyes LiveUpdated October 8, 2026MBS price, UMBS proxy (MBB)
Rate environment stable with no clear directional edge. Lock now is the safer default.
What changed since the last session
What this MBS number is
The figure above is the price of the iShares MBS ETF (MBB), a fund that holds agency mortgage-backed securities. It moves with UMBS prices, so its direction and its position against the 25 and 50 day averages tell you which way rate sheets are leaning. It is a proxy, not the live current-coupon quote a lender's pricing engine uses, and it refreshes through the trading day.
How MBS set mortgage rates
Lenders sell most mortgages into pools of mortgage-backed securities, and the price investors pay for those pools (the UMBS, at the current coupon) is what sets the rate a lender can offer. It is an inverse relationship: when MBS prices rise, mortgage rates fall; when MBS prices sell off, rates rise. Watching MBS intraday is how loan officers anticipate a reprice before the rate sheet changes.
Today's read
Rate environment stable with no clear directional edge. Lock now is the safer default.
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For loan officers
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Get the free MBS widgetFrequently asked questions
What are MBS prices doing today?
As of 2026-10-08, the UMBS proxy is at 89.22 with bearish momentum, below its 50-day average of 92.02.
What is UMBS and the current coupon?
UMBS (Uniform Mortgage-Backed Security) is the standardized security most conventional loans are pooled into. The current coupon is the coupon trading nearest to par, and it is the price loan officers watch to gauge today's rate.
Why do rates rise when MBS fall?
Lenders are paid by selling loans into MBS. When investors pay less for MBS (prices fall), lenders must raise the rate to keep the loan sellable, so your rate goes up.
Which UMBS coupon is the current coupon today?
The current coupon is whichever 30-year UMBS coupon trades closest to par, and it shifts as rates move. This page tracks a fund that holds agency MBS, which shows the direction of the whole market rather than one coupon, so for the exact coupon and its price use your pricing engine or a live feed such as MBS Live.
Where can I see MBS prices for free?
This page shows a free intraday MBS proxy with its trend, and Mortgage News Daily publishes delayed end-of-day UMBS prices for free. Live coupon quotes and instant reprice alerts come from paid feeds. Our comparison of free MBS price trackers covers each option.
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