Short Answer

The 30Y US Treasury yield is likely to settle at 5.41% or above by September 30, 2026, given the yield has already exceeded 5.39% and recorded intraday highs of 5.42%-5.444% as of September 24. Analysts expect the yield to reach 5.45% or higher by the resolution date, with the market pricing this outcome at 93.0%.

1. Market Behavior & Drivers

This market's probability jumped 29 points on September 24, 2026, after the 30-year US Treasury yield hit its highest level since 2004. Reports from Reuters and CNBC confirmed the yield reached an intraday high between 5.42% and 5.444%. This real-world bond market selloff directly triggered the repricing in the prediction market.

The upward trend in market probability reflects the broader increase in long-term rates. The 30-year yield stood at 5.29% on September 17 and averaged 5.22% in August 2026. The provided materials do not contain a specific news event coinciding with the 10-point probability drop recorded on September 17.

Yield above 5.42% is very probable, with intraday highs above 5.44% reported.
A 5.45% yield is the "best estimate," given analysts' expectations.
Yields up to 5.47% are plausible within the 5.40%-5.50% central forecast range.

Who Wins and Why

Outcome	Market	Model	Why
5.5% or above	38.0%	46.1%	The central forecast range is 5.40%–5.50%, and the yield remains under upward pressure.
5.42% or above	82.0%	87.3%	Intraday highs reached 5.42%-5.444% on September 24, suggesting the official daily yield will surpass 5.41%.
5.45% or above	54.0%	62.8%	Intraday yield reached 5.444% on September 24, and the best estimate is 5.45%.
5.41% or above	93.0%	95.3%	Intraday highs exceeded 5.41% on September 23, with further rises reported on September 24.
5.49% or above	25.0%	46.1%	The yield remains under upward pressure within the central forecast range.

Current Context

The 30-year Treasury yield recently hit its highest level since 2004. As of September 24, 2026, the 30-year Treasury yield reached 5.42%–5.444%, according to Reuters and CNBC reports, marking its highest point since 2004 ^[1]^[2]. This follows a period of increasing yields, including 5.29% on September 17 and a monthly average of 5.22% in August 2026 ^[3]^[4]. Prediction markets indicate a September peak around 5.39%–5.42%. Polymarket and ProbSee showed a 61% probability for 5.39% and 27% for 5.42% as of September 19, with lower odds for 5.45% (11%) and 5.50% (3%) ^[5]^[6]^[7]. Parity also priced 5.39% at 70.5¢, 5.42% at 35.5¢, 5.45% at 33.0¢, and 5.50% at 23.5¢ ^[6]. Earlier Kalshi data from September 9 suggested high odds for the daily yield exceeding 5.10%–5.13%, though this information predates the latest surge ^[8]^[9].

Strong economic activity and persistent fiscal pressures are driving yields higher. Near-term upside drivers include stronger-than-expected US economic activity, renewed inflation and oil price pressures, hawkish Federal Reserve commentary, heavy long-end Treasury supply, and elevated fiscal-risk or term-premium concerns ^[10]^[1]^[2]^[11]. The Atlanta Fed's GDPNow estimated Q3 2026 real GDP growth at 5.0796% SAAR on September 17, indicating a strong growth backdrop ^[12]^[13]. The FOMC raised the federal-funds target range by 25 basis points to 3.75%-4.00% on September 16, 2026 ^[14]. Markets were reportedly pricing approximately a 70% probability of an October Fed hike ^[10]^[1]^[2]^[11]. Structural fiscal pressure remains material; the CBO projected a $1.9 trillion FY2026 deficit, equating to 5.8% of GDP ^[10]^[15]. Wells Fargo's June 16, 2026, year-end 2026 30-year yield target was 5.00%–5.50% ^[10]. Key upcoming data releases by September 30 include the August JOLTS report and August personal income, outlays, and PCE data from the BEA, along with the third estimate of Q2 GDP ^[16]^[17]^[18].

The 30-year Treasury yield is most likely to peak near 5.45%. Our best estimate for the maximum official daily 30-year Treasury par yield by September 30, 2026, is about 5.45%, with a central range of 5.40%–5.50% ^[1]^[2]^[5]^[10]. This estimate refers to the Treasury's daily published par yield, distinct from intraday market highs which reached 5.42%–5.444% on September 24 ^[1]^[2]^[11]. A move above 5.50% is considered a lower-probability tail risk, though a push to 5.60%–5.70% is possible if month-end PCE, income/spending, JOLTS, fiscal supply, or term-premium concerns intensify ^[3]^[4]^[19]^[20]^[14]^[12]^[13]. Conversely, a retreat toward 5.30%–5.40% is plausible if oil or geopolitical pressures ease or Treasury demand improves ^[1]^[2]^[5]^[10]. A deeper downside risk entails a retreat toward 5.20%–5.30% if economic data soften or the post-hike long-end selloff reverses ^[3]^[4]^[19]^[20]^[14]^[12]^[13].

Sources (20)

2. Price Chart

Historical Price (Probability)

Outcome probability

Date

3. Significant Price Movements

Notable price changes detected in the chart, along with research into what caused each movement.

Outcome: 5.42% or above

📈 September 24, 2026: 41.0pp spike

Price increased from 41.0% to 82.0%

What happened: The "41.0 percentage point spike" in the prediction market on September 24, 2026, was primarily driven by the actual 30-year US Treasury yield reaching and exceeding the 5.42% threshold on that day ^[1]. Reuters and CNBC reported the yield hitting approximately 5.42%-5.444% intraday, marking its highest level since 2004, driven by a global bond selloff and inflation concerns ^[1]. This significant real-world market development directly coincided with and validated the "5.42% or above" outcome of the prediction market, causing the probability to surge ^[1]. Social media activity was irrelevant, as no related posts or narratives from influential figures were found in the provided research.

📉 September 21, 2026: 36.0pp drop

Price decreased from 43.0% to 7.0%

What happened: The primary driver of the 36.0 percentage point drop in the prediction market on September 21, 2026, was traditional news reporting on market fundamentals. On that date, falling oil prices and optimism surrounding Iran talks were reported to have temporarily pushed the 30-year U.S. Treasury yield lower ^[2]. This news, coinciding with the market movement, directly decreased the perceived likelihood of the yield reaching 5.42% or higher by September 30, 2026. Based on the provided research, social media activity was irrelevant as a driver for this specific price movement.

📈 September 19, 2026: 15.0pp spike

Price increased from 33.0% to 48.0%

What happened: The provided web research does not independently validate a 15.0 percentage point spike in the 30Y US Treasury yield on September 19, 2026, or a specific news/social media catalyst for such a movement ^[3]. No social media posts from key figures or viral narratives, nor any traditional news or policy announcements, were identified as occurring on that date to explain a surge of this magnitude ^[4]^[5]^[6]^[7]^[8]. Given the absence of supporting evidence for the event or its purported drivers, social media activity appears irrelevant as a primary or contributing factor to the described price movement.

Outcome: 5.41% or above

📈 September 23, 2026: 67.0pp spike

Price increased from 17.0% to 84.0%

What happened: The primary driver of the 67.0 percentage point spike in the prediction market on September 23, 2026, was the actual surge in the 30-year US Treasury yield, which hit an intraday high of 5.41% on that date and rose to 5.444% by September 24 ^[1]^[9]. This underlying yield increase was primarily attributed to strong US economic data, rising inflation expectations linked to higher oil prices, increased expectations for Federal Reserve rate hikes, and a weak Treasury auction ^[1]^[10]^[11]. These factors made the "5.41% or above" outcome for the prediction market a near certainty. Social media activity, including general commentary on US Treasury Secretary Scott Bessant's remarks, appears to have been mostly noise or tangential, rather than a primary driver of this specific price movement ^[12].

Outcome: 5.43% or above

📈 September 18, 2026: 28.0pp spike

Price increased from 13.0% to 41.0%

What happened: The provided research does not explicitly establish a 28.0 percentage point spike in the prediction market price or a specific news/social media catalyst for such a move on September 18, 2026 ^[3]^[13]. However, traditional news reported US Treasury yields rising that day, driven by expectations for higher policy rates, a smaller-than-expected Treasury buyback, surging oil prices above $100, and persistent inflation and fiscal-supply concerns ^[14]^[15]. These factors likely underpinned increased market conviction that the 30Y yield would reach 5.43% or above by September 30. Social media was irrelevant, as no activity linked to this prediction market movement was identified.

Sources (15)

4. Market Data

Contract Snapshot

A YES resolution occurs if the 30-year US Treasury yield reaches 5.45% or above. Conversely, a NO resolution occurs if the yield remains below 5.45%. The market will resolve based on the yield by the specified Wednesday, and no special settlement conditions are mentioned in the provided content.

Available Contracts

Market options and current pricing

Outcome bucket	Yes (price)	No (price)	Last trade probability
5.41% or above	$0.90	$0.26	93%
5.42% or above	$0.79	$0.35	82%
5.44% or above	$0.69	$0.61	62%
5.45% or above	$0.60	$0.62	54%
5.46% or above	$0.58	$0.76	42%
5.5% or above	$0.26	$0.86	38%
5.43% or above	$0.72	$0.53	34%
5.47% or above	$0.50	$0.80	27%
5.49% or above	$0.25	$0.90	25%
5.48% or above	$0.54	$0.93	8%

Market Discussion

The 30-year US Treasury yield reached 5.444% on September 24, 2026, its highest level since 2004, following a rise from 5.29% on September 17, 2026 ^[1]^[2]^[3]. While prediction market commentary had previously clustered around a September peak near 5.39% ^[4]^[5], the consensus as of September 24 suggested the yield would likely peak around 5.50% by September 30, driven by factors such as persistent fiscal deficits, strong growth, elevated term premium, and renewed Federal Reserve hike expectations ^[1]^[6]^[5]^[7]^[8]^[9].

Sources (9)

5. Trust Index

Order book is critically thin.

Primary risk· Trade quality

How it adds up

Integrity80% of score78Good

Market integrity is low (68), but Integrity averages all three scores, so the other two pull it up. Only a critically low score would cap the total.

Trade quality20% of score35High Risk

Includes the cost to trade: a $1,000 order can't be filled here because the order book is too thin.

Trust score70Good

Weighted blend with hard caps — a critically weak safety pillar, or a severe trading anomaly, caps the total regardless of the rest. Full methodology · About the Trust Index

Trust profile

Integrity4 screens run · 6 don't apply

6. What specific inflation reading in the final pre-resolution data releases could solidify a hawkish Federal Reserve stance and push the 30-year yield above 5.45%?

August Core PCE Y/Y Target	3.4% or higher (monthly core gain 0.3% or more) ^[1]^[2]^[3]
Data Release Date	September 30, 2026, 8:30 AM ET/EDT ^[3]^[4]^[5]
30-year Yield Threshold	Above 5.45% ^[1]

Higher August PCE inflation data could solidify a hawkish Fed stance. A hawkish Federal Reserve stance and a push for the 30-year yield above 5.45% could be solidified by August inflation readings meeting specific thresholds ^[1]^[2]^[3]. These include a core Personal Consumption Expenditures (PCE) price index at 3.4% year over year or higher, ideally accompanied by a monthly core gain of 0.3% or more, and a headline PCE at 3.8% or higher ^[1]^[2]^[3]. This critical data will be released in the Personal Income and Outlays report for August 2026 on September 30, 2026, at 8:30 AM ET/EDT ^[3]^[4]^[5].

Strong inflation readings would indicate non-decelerating underlying price pressures. A core PCE reading of approximately 3.4% year over year or greater, surpassing the 3.3% consensus, particularly with a monthly core increase around 0.3% or more, would signal that underlying inflation is not decelerating ^[2]^[6]^[3]. Such an outcome would reinforce a hawkish Fed policy, thereby likely extending expectations for restrictive monetary policy and driving yields above 5.45% ^[1]. Current nowcasting estimates from the Cleveland Fed project August 2026 year-over-year Core PCE at 3.40% and overall PCE at 3.78%; readings exceeding these figures could exert further upward pressure on 30-year Treasury yields ^[7]^[8]. For context, the 30-year yield closed August at 5.24%, making a movement beyond 5.45% a plausible scenario given the ongoing selloff in long-duration assets ^[1].

Sources (8)

7. How does the Congressional Budget Office's FY2026 deficit forecast align with the US Treasury's planned bond issuance schedule through September 2026?

FY2026 Federal Deficit (CBO August estimate)	$2.1 trillion ^[1]^[2]
July-September 2026 Net Marketable Borrowing (Treasury)	$739 billion ^[3]
Probability of 30Y Treasury Yield >= 5.35% (as of Sept 11)	99% ^[4]

The Congressional Budget Office's FY2026 deficit forecast indicates substantial federal borrowing demands. The CBO initially projected a $1.9 trillion deficit (5.8% of GDP) for FY2026 in February, later revising this estimate to approximately $2.1 trillion by August, signaling significant fiscal borrowing requirements ^[1]^[2]. This trend aligns with the US Treasury's revised financing estimates, which included a projection of $739 billion for privately held net marketable borrowing from July to September 2026, an increase from its May estimate ^[3]. This persistent demand for fiscal borrowing is consistent with ongoing upward pressure observed on term yields ^[1]^[3]^[5].

Treasury's bond issuance schedule reflects significant long-duration fiscal supply. The August-October 2026 nominal coupon schedule maintained auction sizes broadly steady, with September offerings including notable amounts across various durations, such as $69 billion in 2-year notes and $39 billion in 10-year notes ^[5]^[6]. While Treasury planned up to $38 billion in off-the-run liquidity-support buybacks and up to $25 billion in cash-management buybacks, alongside New York Fed reserve-management purchases, these operations primarily aim to improve secondary-market liquidity ^[5]^[7]^[8]. These measures are not expected to materially offset the gross issuance burden or September's long-duration fiscal supply ^[5]. The fiscal-to-market transmission suggests that increased deficits leading to greater issuance generally result in lower bond prices and higher yields, assuming constant demand ^[9]^[10].

Market evidence suggested historically high long-end yields were priced in. Prediction market data strongly indicated a high probability of the 30-year Treasury par yield exceeding 5.30% during the September 9-30 window, with a Kalshi-odds aggregator showing a 99% probability for 5.35% or above as of September 11 ^[4]. The 30-year Treasury yield was 5.29% on September 17, 2026, after reaching 5.36% on September 15, with the August monthly average at 5.22% ^[11]^[12]. These figures indicated that the market was already pricing in historically high long-end yields ^[11]^[12]. A reasonable central estimate for the 30-year US Treasury yield by September 30, 2026, for an intraday or high close, was approximately 5.5%, with a move above 5.75% likely requiring additional shocks beyond the already announced issuance ^[11].

Sources (12)

8. How did Wells Fargo's year-end 2026 forecast for the 30-year yield compare to the probabilities implied by Polymarket and Parity in mid-to-late September?

Polymarket expected September high	Around 5.39%–5.42% or higher (September 2026) ^[1]^[2]
Polymarket probability for Sep high	99% for at least 5.35% (September 2026) ^[3]^[4]^[5]
Wells Fargo year-end forecast range	5.00%–5.50% (year-end) ^[3]^[1]^[2]

Insufficient evidence prevents a full comparison of forecasts and probabilities. The available research was insufficient to precisely quantify probabilities from Polymarket or Parity, making it impossible to determine if they exceeded or fell below Wells Fargo’s year-end forecast for the 30-year yield ^[6]^[7]^[8]. Furthermore, the specific numerical forecast for Wells Fargo’s year-end 2026 30-year yield could not be established from the provided sources ^[7]^[8]. No directly retrievable Parity-specific order-book snapshot was found in the search results, precluding an exact Parity probability from being claimed ^[3]^[1]^[2].

Polymarket probabilities suggested a September high near Wells Fargo's range. Polymarket’s September 2026 market, utilizing threshold contracts, showed the 5.42% contract as active, with search snapshots indicating 5.39% as a 100% frontrunner ^[1]^[2]. This implied market expectations for a monthly high around 5.39%–5.42% or potentially higher. A September 11 snapshot for the matching market indicated a 99% probability for a yield of at least 5.35% ^[3]^[4]^[5]. The 30-year Treasury constant-maturity yield registered 5.35% on September 11 and 16, 2026, and 5.29% on September 17, positioning the mid-September level near 5.3% ^[7]^[9]. Based on this mid-to-late September evidence, markets assigned near-certainty to a September peak above approximately 5.3% and around 5.39%–5.42%, placing the market-implied September high near the upper boundary of, or modestly above, Wells Fargo's projected 5.00%–5.50% year-end range ^[3]^[1]^[2].

Sources (9)

9. What is the methodology and publication lag for the US Treasury's official daily 30-year par yield, and how has it differed from intraday market highs reported by Reuters and CNBC in September 2026?

Official yield input collection time	At or near 3:30 PM ET ^[1]^[2]
Official yield publication time	By 6:00 PM ET ^[1]
Publication lag for official yield	Approximately 2.5 hours ^[1]

The U.S. Treasury's 30-year par yield has a specific methodology. The U.S. Treasury's official daily 30-year par yield is calculated from indicative bid-side market price quotations obtained by the Federal Reserve Bank of New York at or near 3:30 PM ET each trading day, using a monotone convex interpolation method ^[1]^[2]. These official rates are typically published by 6:00 PM ET, resulting in a publication lag of approximately 2.5 hours from the collection of market inputs ^[1].

Official yields significantly differ from real-time intraday market data. This official yield represents a specific snapshot, distinct from intraday yields reported by news platforms like CNBC, which capture real-time market fluctuations ^[3]^[4]^[5]. Intraday Treasury yields often vary significantly from the official daily par yield because Treasury trading is continuous, with prices influenced by macro releases, auctions, and end-of-day strikes ^[6]^[7]. The official Treasury value therefore represents a delayed, 3:30 PM-anchored observation, and thus may not capture an earlier or later intraday peak ^[8]^[6]^[7].

Official yields are benchmarks, not necessarily intraday maximums. Financial prediction markets for the 30-year Treasury yield explicitly rely on the Treasury's official daily publication, treating it as a daily close-like benchmark rather than an intraday maximum ^[8]^[9]^[10]. Regarding September 2026, specific intraday highs reported by Reuters or CNBC could not be established from the retrieved evidence.

Sources (10)

10. What probabilities for a Federal Reserve rate hike in the fourth quarter of 2026 were priced into the CME's FedWatch Tool as of late September?

Q4 2026 Federal Reserve meeting probabilities	Not explicitly substantiated for each meeting as of late September ^[1]
December FOMC hike probability (Sept 10, 2026)	Close to 60% ^[2]
Upcoming 25-basis-point hike probability (Sept 9, 2026)	62.4% ^[3]

Specific late-September Q4 2026 Fed hike probabilities were not available. The retrieved sources did not provide a historical CME FedWatch table for September 24, nor explicit separate October, November, or December 2026 hike percentages ^[1]. However, contemporaneous reporting from September 10, 2026, indicated that CME FedWatch pricing put the probability of a second 2026 rate increase, identified as a December FOMC hike, at close to 60% ^[2].

Market expectations for rate hikes shifted notably leading into September. Earlier in 2026, the CME's August 5 Rates Recap indicated that FedWatch was pricing one rate hike for the remainder of the year ^[4]. By September 9, 2026, CME reported a 62.4% probability of a 25-basis-point hike at the upcoming Federal Reserve meeting, showing a material rise in near-term hike odds by early September ^[3].

CME FedWatch probabilities are market-derived, not official Federal Reserve forecasts. These probabilities represent market-implied estimates derived from 30-Day Federal Funds futures and should not be considered official Federal Reserve forecasts ^[5].

Sources (5)

11. What Could Change the Odds

Key Catalysts

The 30-year U.S. Treasury yield reached approximately 5.43%

5.44% as of September 24, 2026, marking its highest level since 2004 ^[1]^[2]. This surge is driven by resilient economic growth, persistent inflation pressures, and increased market expectations for further Federal Reserve interest rate hikes following a 25-basis-point increase in mid-September 2026 ^[1]^[3]. Prediction markets reflected this trend, with contracts regarding the 30-year yield breaching 5.30%, 5.33%, and 5.36% resolving as "Yes" early in September 2026 ^[4]^[5]^[6]^[7]. Current active prediction markets focus on thresholds of 5.39% and above through month-end ^[4]^[5]^[6]^[7]. As of September 17, 2026, the 30-Year U.S. Treasury Constant Maturity security yield was 5.29% ^[8].

Analysts' projections and market positioning suggest continued upward pressure on long-end rates, with some base-case forecasts targeting 5.50% by the October 2026 FOMC meeting ^[9]^[10]^[11]. This outlook is driven by factors such as the repair of inverted yield spreads and ongoing fiscal supply concerns ^[9]^[10]^[11]. Recent market activity has been influenced by rising expectations of Federal Reserve rate hikes; September 2026 data indicates a 62.4% probability of a 25 basis point increase at the FOMC meeting ^[12]. The FOMC's September 16, 2026, Summary of Economic Projections informs broader market sentiment ^[13]. Key economic data releases scheduled for early October 2026 include the September 2026 employment situation (October 2), the September Consumer Price Index (October 14), and the September Personal Income and Outlays report (October 29) ^[14]^[15]. These releases will be critical for evaluating macroeconomic conditions that influence long-term Treasury yields ^[14]^[15].

Key Dates & Catalysts

Strike Date: September 30, 2026
Expiration: October 02, 2026
Closes: September 30, 2026

Sources (15)

12. Keep Exploring

IPO Tracker Companies preparing to go public, with the market's view on timing. More Interest Rates markets See more interest rates setups in the same theme. Browse all Financials markets Keep exploring adjacent financials markets. Track this in the app Open the live app flow and keep following this market in real time.

13. Historical Resolutions

Historical Resolutions: 15 markets in this series

Outcomes: 15 resolved YES, 0 resolved NO

Recent resolutions:

KX30YRDIRHM-27JAN01H-T5.33: YES (Sep 21, 2026)
KX30YRDIRHM-27JAN01H-T5.32: YES (Sep 21, 2026)
KX30YRDIRHM-27JAN01H-T5.31: YES (Sep 21, 2026)
KX30YRDIRHM-27JAN01H-T5.30: YES (Sep 21, 2026)
KX30YRDIRHM-27JAN01H-T5.29: YES (Sep 21, 2026)

How high will the 30Y US Treasury yield get by Sep 30, 2026?

Short Answer

1. Market Behavior & Drivers

Who Wins and Why

Current Context

2. Price Chart

Historical Price (Probability)

3. Significant Price Movements

Outcome: 5.42% or above

📈 September 24, 2026: 41.0pp spike

📉 September 21, 2026: 36.0pp drop

📈 September 19, 2026: 15.0pp spike

Outcome: 5.41% or above

📈 September 23, 2026: 67.0pp spike

Outcome: 5.43% or above

📈 September 18, 2026: 28.0pp spike

4. Market Data

Contract Snapshot

Available Contracts

Market options and current pricing

Market Discussion

5. Trust Index

6. What specific inflation reading in the final pre-resolution data releases could solidify a hawkish Federal Reserve stance and push the 30-year yield above 5.45%?

7. How does the Congressional Budget Office's FY2026 deficit forecast align with the US Treasury's planned bond issuance schedule through September 2026?

8. How did Wells Fargo's year-end 2026 forecast for the 30-year yield compare to the probabilities implied by Polymarket and Parity in mid-to-late September?

9. What is the methodology and publication lag for the US Treasury's official daily 30-year par yield, and how has it differed from intraday market highs reported by Reuters and CNBC in September 2026?

10. What probabilities for a Federal Reserve rate hike in the fourth quarter of 2026 were priced into the CME's FedWatch Tool as of late September?

11. What Could Change the Odds

Key Catalysts

Key Dates & Catalysts

13. Historical Resolutions

Prediction Markets

Public Markets

Developers

Company

Short Answer

Who Wins and Why

Current Context

Historical Price (Probability)

Outcome: 5.42% or above

📈 September 24, 2026: 41.0pp spike

📉 September 21, 2026: 36.0pp drop

📈 September 19, 2026: 15.0pp spike

Outcome: 5.41% or above

📈 September 23, 2026: 67.0pp spike

Outcome: 5.43% or above

📈 September 18, 2026: 28.0pp spike

Contract Snapshot

Available Contracts

Market options and current pricing

Market Discussion

Key Catalysts

Key Dates & Catalysts

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Prediction Markets

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Developers

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