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Crude oil price decline graphic accompanying Rigzone report on Iran diplomacy hopes, September 21 2026
Photo: Rigzone

10-Year Treasury Yield Falls to 4.95% After Oil Drops on Iran Talks

Rigzone2 min read6 sources

Why is the 10-year Treasury yield falling today?

The 10-year Treasury yield (^TNX) fell 4 basis points to 4.95% on Tuesday as WTI crude dropped to $95.78 and back-channel US-Iran diplomacy stripped the inflation risk premium from bonds.

Key numbers

10-Year Treasury yield (Sept 22)4.95%-4bp on the day
10-Year yield 19-year high5.04%reached Sept 16–18 (per [5])
WTI crude oil$95.78/bbl-4.51% (-$4.52)
Brent crude oil$100.34/bbl-3.40% (-$3.53)
Fed funds rate (new range)3.75%–4.00%+25bp, Sept 16 unanimous vote
S&P 500 (Sept 21 close)7,764+1.49%

What happened

The 10-year Treasury yield (^TNX) fell 4 basis points to 4.95% on Tuesday as WTI crude dropped to $95.78 and back-channel US-Iran diplomacy stripped the inflation risk premium from bonds. The retreat follows last week's 19-year high of 5.04% — the highest since 2007 — reached after the Federal Reserve raised its key rate 25 basis points on September 16 to 3.75%–4.00% in a unanimous vote, erasing the S&P 500's monthly gains. Oil fell 4.5% on Monday as President Trump said he would probably meet Iranian President Pezeshkian at the UN General Assembly, while Saudi Arabia's exports recovered above 4 million barrels per day, removing two supply-risk premiums at once.

Why it matters

The 10-year Treasury yield sets the cost of borrowing across the whole economy — from 30-year mortgages, which climbed to 7.19% after the Fed hike, to the valuations of fast-growing technology companies. When yields fall, growth stocks become more attractive because investors discount their future earnings at a lower rate, which is why the Nasdaq jumped 2.3% to a record close on Monday. The drop in oil and yields together reduces the risk of inflation reaccelerating, giving the Fed room to reconsider the additional hike its own projections already signal.

Who this affects

Marketbullish
Medium impact
Growth stocks and bonds both rally as rate-hike fears ease.
Companybullish
Medium impact
Rate-sensitive tech companies gain as future-earnings valuations re-expand.
Competitorsbearish
Low impact
Energy stocks and high-yield cash accounts lose relative appeal.
Industrybullish
Medium impact
Bond market volatility eases, reducing refinancing pressure on corporate borrowers.

US 10-Year Treasury vs 2-Year, 30-Year, Fed Funds Rate

Fed Funds (ceiling)—4.00%+25bp (Sep 16)——
US 2-YearDGS24.75%—+75bp—
US 10-Year^TNX4.95%-4bp+95bp—
US 30-YearDGS305.33%—+133bp—

As of 2026-09-22

How we got here

  1. 10-year yield breaches 5% for first time since 2007.

  2. Fed raises rates 25bp to 3.75%–4.00%; yield hits 5.04% peak.

  3. 30-year mortgage rate reaches 7.19%; yield holds above 5%.

  4. Oil falls 4.5% on Iran UNGA signal; S&P 500 gains 1.49%.

  5. 10-year yield retreats to 4.95%; Nasdaq holds near record high.

What to watch

  • US-Iran UNGA back-channel outcome — deal could cut oil risk premium further.2026-09-25
  • Next Fed meeting — dot plot projects one more 25bp hike before year-end.Q4 2026
  • September CPI report — will the oil drop flow through to core inflation.2026-10-14

Educational content only. Not investment advice.

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