The 30-year fixed mortgage averaged 6.66 percent for the week ending July 30, up from 6.58 percent the week before. That is the highest level in roughly a year.
The 15-year fixed averaged 6.04 percent, up from 5.96 percent.
Here is the part worth sitting with: a year ago the 30-year averaged 6.72 percent. So after twelve months of headlines about the Fed, the direction of rates, and what was coming next — we are essentially back where we started.
Why this matters to an investor and not just a homebuyer
You are probably not financing your flip with a 30-year fixed. But your buyer is.
The 30-year rate sets what your exit buyer can afford, which sets what your finished house is actually worth, which sets your after-repair value. Every dollar of monthly payment your buyer cannot carry comes out of your ARV. That is the transmission mechanism, and it is why I read this number every week even though I do not originate a single 30-year loan.
The 10-year Treasury sat at 4.70 percent on August 3, down about five basis points on the session. Mortgage rates track the 10-year more than they track the Fed, which is a distinction most commentary skips.
The move
Pull the comps your exit buyer would actually qualify for at 6.66 percent, not at the rate you had in your head from last spring. If the spread between those two numbers eats your margin, you found your answer before you bought the house instead of after.
Sources: Freddie Mac Primary Mortgage Market Survey, week ending July 30, 2026; US 10-year Treasury yield, August 3, 2026. Retrieved August 3, 2026. Nothing here is investment, legal, or tax advice.