10-Year Treasury Jumps to 5.23% as Oil Rebounds on Iran Standoff

Why this matters: The 10-year Treasury yield rose early Monday as oil climbed after President Trump rejected Iran's latest proposal. Oil uncertainty pushed long-term yields higher this morning, which can pressure mortgage pricing, but your lender's actual quote is the number to compare.

Measure	Level	What it is
10-year Treasury	5.23%	7:25 a.m. EDT Monday market quote
Friday official 10-year CMT	5.17%	Treasury near-3:30 p.m. observation
WTI crude	about $96	up about 4% early Monday
Freddie Mac 30-year average	7.03%	week ending September 24

A six-basis-point morning move

At 7:25 a.m. EDT on September 28, Investopedia reported the 10-year Treasury yield at 5.23%, up from 5.17% late Friday, with WTI crude up about 4% near $96. That is an early-morning market quote, not a closing level, and it can change during the session.

The comparison point is Friday's official figure. The Treasury's daily par yield curve put the 10-year constant maturity rate at 5.17% on September 25. Treasury says those rates are based on indicative bid-side quotations obtained at or near 3:30 p.m. each trading day.

A quick reminder on direction: yields rise when Treasury prices fall. A higher yield means investors paid less for the same bond this morning.

Why oil matters to bonds

Over the weekend, President Trump rejected Iran's proposal to reopen the Strait of Hormuz within a week if the U.S. ended its naval blockade, lifted oil sanctions and accepted a wider ceasefire. CBS reported that Trump expected talks to resume this week. That is an expectation, not a completed negotiation or agreement.

Higher oil prices can lift inflation concerns, and bond investors tend to demand more yield when they expect more inflation. The timing makes the oil rebound and renewed Iran uncertainty the clearest immediate catalyst. Price action alone cannot prove one cause, though. Treasury supply, inflation expectations, Fed expectations and positioning can all move yields too.

What it can mean for mortgage quotes

Mortgage rates do not rise point for point with the 10-year yield. Lenders price loans through mortgage-backed securities, and the final quote also reflects hedging costs, lender capacity, loan characteristics, points and competition.

The latest broad benchmark is Freddie Mac's weekly survey, which averaged 7.03% for the 30-year fixed as of September 24, up from 6.95% the week before. That weekly, application-based average is not a live quote, and it cannot show what every lender is offering today.

Three releases that could reset the move

These are scheduled times, not forecasts. Sunday's week-ahead article covers the full calendar.

• August JOLTS: Tuesday, September 29, 10:00 a.m. ET (BLS)
• August Personal Income and Outlays, including PCE inflation: Wednesday, September 30, 8:30 a.m. ET (BEA)
• September Employment Situation: Friday, October 2, 8:30 a.m. ET (BLS)

Monday is a normal bond-market business day, with no close or early close on SIFMA's holiday schedule.

Practical takeaway

Before reacting to a headline, compare quotes that are built the same way. Request updated pricing with the same loan amount, credit score, loan-to-value, property type, occupancy, points and lock period.

Compare both cash to close and APR, and ask how long each quote is valid. A lower rate with more points is a different offer, not a better one by default.

Whether to lock or float depends on the borrower's timeline and tolerance for change. Nobody knows how the bond market will close today, or how this week's data will land.

Cover: archival photo from June 17, 2026, of President Donald Trump signing the U.S.-Iran memorandum of understanding at the Palace of Versailles, France. It does not show this week's events. Official White House Photo by Daniel Torok, United States government work, via the White House on Flickr. Cropped to 16:9.