198 bps: The Mortgage Spread Is the Story
The gap between the 10-year Treasury and the 30-year mortgage hit 215 bps on April 2 and has only retraced to 198. Even if Treasuries ease further, buyers may not see most of the relief.
The Number
198 basis points. That's the current gap between FRED's 30-year mortgage rate of 6.30% on April 16 and the 10-year Treasury yield of 4.32% the same day.
Two weeks earlier, the spread was wider — 215 bps on April 2, when the 30-year hit its 2026 peak at 6.46%. That's deep into "elevated" territory. The pre-pandemic 2015–2019 average ran roughly 170 bps. Today's number sits nearly 30 bps above that norm.
The spread moves independently of the underlying Treasury. Investors demand a premium to hold mortgage-backed securities rather than risk-free government paper. When that premium widens, the Treasury can fall and the mortgage rate barely follows.
The Context
This matters because the bond market has been volatile. The 10-year ran from 3.97% on February 27 to 4.44% on March 27 — a 47 bp surge — and is now at 4.32, only partway back down. Every analyst watching rates assumed that if the 10-year eased, the 30-year would fall in lockstep.
It hasn't. Bill McBride at Calculated Risk has been flagging the spread persistence for months. He's right to. Here's the math that investors should internalize: if the 10-year falls 25 bps from here, and the historic spread of 170 bps holds, the 30-year should land at ~5.77%. But at today's 198 bp spread, it lands at ~6.05%. That's a 28 bp gap sitting in the markup.
On a $300,000 30-year loan, 28 bps is roughly $52/month — or $18,720 over the life of the note. That's not noise. That's a structural tax being withheld from the rate rally buyers have been waiting on since Friday's rate-relief brief.
Also Moving
- Existing home sales fell 3.6% MoM to 3.98M SAAR in March — the weakest March print since 2024. (FRED EXHOSLUSM495S)
- Months of supply jumped to 4.1 from 3.8 — Friday's buyer-window brief covered the listings acceleration
- Unemployment ticked down to 4.3% from 4.4% in February. Labor holding, but rates aren't following. (FRED UNRATE)
The Investor Read
The spread is your underwriting constant, not the rate. If you've been modeling a 30-year drop to 5.75% based on a Treasury rally, you need to shave that to 6.00–6.10% until spreads compress. Spreads compress when mortgage-backed securities become attractive relative to Treasuries — typically when prepayment risk stabilizes or the Fed signals quantitative easing. Neither is imminent.
For deals you're underwriting this quarter: stress-test the cash-flow at 6.50% financing. If the deal still pencils, the spread is your friend — competing buyers are modeling to 5.75% and will fall out of escrow when their lender quotes 6.15%. For deals you already own: the spread doesn't help you refi in 2026. Plan for your current rate to be the rate you hold through 2027.
What's your refi trigger — a specific rate, or a specific spread? Hit reply, I read every one.
SAAR is the Seasonally Adjusted Annual Rate — a single month's economic activity converted to an annual equivalent by first stripping seasonal patterns, then multiplying by 12.
Read definition →BPS is the Census Bureau's monthly survey of residential building permits issued by local permit-issuing jurisdictions — the source of every county and metro permit count used in real estate supply analysis.
Read definition →Rent is the periodic payment a tenant makes to a landlord in exchange for the right to occupy a property -- the single revenue line that funds your mortgage, expenses, and profit as a rental property investor.
Read definition →An Employer Identification Number (EIN) is a nine-digit federal tax ID assigned by the IRS to identify a business entity for tax and banking purposes.
Read definition →APR (Annual Percentage Rate) is the total annualized cost of a loan expressed as a percentage, incorporating both the interest rate and lender fees — origination charges, discount points, broker fees — spread across the full loan term. Mandated by the Truth in Lending Act, it gives borrowers a standardized number that's always higher than or equal to the stated interest rate.
Read definition →A basis point (BP or BPS) is one-hundredth of one percentage point — 0.01% or 0.0001 in decimal form — used as a precise unit of measurement for interest rates, yields, spreads, and other financial figures where small changes carry large consequences.
Read definition →Martin Maxwell
Founder & Head of Research, REI PRIME
Specializing in rental properties, I excel in uncovering investments that promise high returns. Sailing the seas is my escape, steering through challenges just like in the world of real estate.
More from Invest
Continue exploring the Invest phase of the PRIME framework.
April Jobs Print Beats: 115K Hired, 4.3% Unemployment Holds
BLS reports 115K nonfarm payrolls in April, doubling consensus. Unemployment holds at 4.3%. The print gives Fed hawks cover as Iran-conflict yields push the 30-year mortgage rate to 6.41%.
Sophia Warren · May 8, 2026
FHA Loans Now Carry Half of All Seriously Delinquent Mortgages
FHA loans hold 11% of active mortgages but 50% of seriously delinquent ones in MBA Q4 2025 — and ICE pins 80% of recent severe-delinquency growth on FHA.
Sophia Warren · May 8, 2026
Residential Construction Spending Slips to $854.6B as Single-Family Pulls Back
Census C30 puts March private residential construction at $854.6B SAAR. Single-family decelerated while multifamily eased — the supply pipeline keeps thinning.
Sophia Warren · May 8, 2026