Fed hikes to 3.75%–4%, Clarity Act fails in the Senate, Bitcoin clears $85,000 (2026)

The Federal Reserve raised its benchmark rate on September 16 for the first time since 2023, and the board turned the next meeting into a coin flip inside two days. The Senate blocked the crypto market-structure bill on Tuesday, sending Bitcoin down more than 5% before it recovered through the Fed decision and cleared $85,000. Crude touched $105 and then handed the gain back as Saudi Arabia found another route to market.

This recap covers September 14, 9:00 a.m. through September 21, 2026, 9:10 a.m. ET. Polymarket prices, weekly changes, volume, liquidity, and order-book quotes were refreshed between 9:04 and 9:08 a.m. ET on September 21. An inferred starting probability equals the current Yes price minus Polymarket's displayed one-week change, and dollar figures are rounded to the nearest dollar.

The board at a glance

Theme and contract	Current Yes	Inferred Yes one week ago	Volume in past 7 days	Liquidity	Best bid / ask	Resolution clock
Fed: +25 bp after the October meeting	49.5%	36.5% (+13.0pp)	$1,636,161	$392,549	49¢ / 50¢	October 27–28 meeting 1 2
Fed: no change after the October meeting	48.5%	62.5% (−14.0pp)	$1,942,383	$320,012	48¢ / 49¢	October 27–28 meeting 3
Clarity Act (H.R.3633) signed into law in 2026	7.15%	26.5% (−19.35pp)	$6,337,612	$325,684	7¢ / 7.3¢	December 31, 2026 4
Bitcoin reaches $90,000 in September	38.4%	8.0% (+30.4pp)	$346,762	$56,338	38¢ / 38.8¢	September 30, 2026 5
Saudi East-West pipeline restarts by September 30	31.5%	60.5% (−29.0pp)	$342,583	$18,766	31¢ / 32¢	September 30, 2026 6
U.S. invades Iran before 2027	16.5%	data temporarily unavailable	$1,506,705	$678,935	16¢ / 17¢	December 31, 2026 7
Flávio Bolsonaro wins the 2026 Brazilian presidential election	60.25%	51.45% (+8.8pp)	$646,938	$253,042	60.2¢ / 60.3¢	October 4, 2026 8

Polymarket publishes no seven-day change for the U.S.–Iran invasion contract, so that cell is marked unavailable while its weekly volume and book are reported. The rest of the column is derived as described above.

The two October Fed contracts trade inside the "Fed Decision in October?" event, which turned over $6,745,121 in the past week on $1,945,975 of open interest and $1,707,220 of book liquidity. 9 The Bitcoin and crude thresholds sit inside monthly ladder events carrying $4,184,680 and $1,724,932 of weekly volume, with $2,569,923 and $1,989,022 of open interest. 10 11 Child figures count trades in the contract named in the row; event figures count every threshold in that month's ladder. Rows and events measure different things and are kept apart for that reason.

The Fed hikes, then prices a second move near even money

The FOMC voted 12–0 on September 16 to lift the target range for the federal funds rate by a quarter point, to 3.75%–4.00%. The increase was the first since July 2023 and the first under Chairman Kevin Warsh, who took office in late May. 12 13 The policy statement said inflation "remains elevated" and that the action would "support a timelier return to the Committee's 2 percent goal." 12

The projections released with the decision put 16 of 18 participants behind at least one more quarter-point increase before the end of 2026, with four of those seeing two more. The median path reaches 4.00%–4.25% this year and holds there through 2027. 12 13 Officials marked their 2026 inflation forecasts up to 3.7% headline and 3.4% core, a tenth higher than in June, and pushed the return to the 2% target out to 2029. 12 13

Polymarket's October contracts moved further than the decision itself. The quarter-point increase after the October 27–28 meeting traded at 49.5%, up 13.0 points from an inferred 36.5%, on $1,636,161 of weekly volume, with a 49¢ / 50¢ quote inside a $392,549 book. 1 The no-change contract fell 14.0 points to 48.5% on $1,942,383 of volume. 3 At the December 8–9 meeting, the board prices a further increase at 67.5% and no change at 29.5%. 2 14 Both meetings price the next move as either a hike or a hold; the October reduction contract sits at 0.55% on $1,130,945 of weekly volume. 15

Rate futures, which put the odds of a follow-up hike by the end of the year at about 90% on the day of the decision, agree with the direction of both boards. 13 The two-year Treasury yield reached its highest level in more than two years after the statement, and the average 30-year fixed mortgage rate had climbed to 7.19%, up about a full point from a year earlier. 12 13

Hike case (49.5%): Two-thirds of the committee projects another increase this year, the policy statement dropped its earlier reference to energy supply shocks, and Warsh described broad financial conditions as something he would be "hard-pressed" to call restrictive. 13

Hold case (48.5%): The October meeting arrives six weeks after a hike whose effect has not yet shown up in data, and a 30-year mortgage above 7% ahead of the November midterms tightens conditions without a second move. 12

Conditional trade inference: Because the October contract sits at 49.5¢, the market has not chosen a branch, and each branch maps onto a different part of the curve. A hold would let two-year yields give back part of their post-September climb, which is where long-duration Treasuries and rate-sensitive equities such as homebuilders and utilities take their cue. A second hike six weeks after the first would make the 2027 path the live question, and the December contract already prices a further increase at 67.5%, so a trade that needs a faster sequence is paying for something the board half-believes.

The Clarity Act fails a procedural vote and the 2026 window closes

On September 15 the Senate voted 50–49 on the motion to proceed to H.R.3633, the Digital Asset Market Clarity Act, ten votes short of the 60 needed to advance. Four Republicans — Jerry Moran, Susan Collins, Josh Hawley and Thom Tillis — joined every Democrat in voting no. Tillis switched his vote from yes to no in a procedural move that preserves his ability to bring the measure back. Senate Republicans had released new bill text on Sunday night to answer banking-industry objections. 16

The contract asking whether the Clarity Act is signed into law in 2026 fell from an inferred 26.5% to 7.15%, a drop of 19.35 points on $6,337,612 of weekly volume — the largest weekly turnover on the board this week. Liquidity of $325,684 supports a 7¢ / 7.3¢ quote. The market resolves on the bill passing both chambers and being signed by December 31, with Congress.gov as its primary source. 4

Reuters reported that the vote put the bill on ice, because Congress departs Washington this month ahead of the November midterms. 16 Bitcoin fell more than 5% as the vote failed, its largest daily decline since June, and shares of Coinbase and Circle fell as much as 10%. 16

Yes case (7.15%): Tillis's procedural switch keeps the measure available for reconsideration, and the crypto industry spent hundreds of millions of dollars campaigning for it, which leaves a lame-duck session after the midterms as the remaining window in 2026. 16

No case (92.85%): Ten votes separated the bill from advancing, the Senate calendar closes this month, and executives who wanted the statute say agency rulemaking is the weaker substitute because rules written by the SEC and CFTC stay exposed to the next administration and to court challenges. 16

Conditional trade inference: At 7¢ the contract has little left to pay for a correct call, so the tradeable information sits downstream. The first branch is a rulemaking cycle at the SEC and CFTC filling the void, which favours US-listed exchanges and custody businesses on the regulatory-reduction side. The second is a return of the bill in a lame-duck session, which would be worth watching through the contracts most exposed to a statutory framework. Both branches hinge on the same date: the midterms determine whether the Senate that reconvenes has the votes that failed this week.

Bitcoin clears $85,000 as ETF flows flip by $1.3 billion in two sessions

Bitcoin fell on the Senate vote and then climbed through the Fed decision. On Kraken's daily candles, which open at 7:00 p.m. ET the previous evening, Bitcoin closed at $76,800.20 on September 13, traded down to $74,891.50 on September 15, and closed September 18 at $80,878.10. It stood at $85,209.10 on the morning of September 21 after printing a session high of $85,836.70. 17

US spot Bitcoin funds followed the same shape with a sharper swing. Net flows ran +$159.9 million on September 14, −$450.4 million on September 15, −$295.9 million on September 16, +$159.5 million on September 17 and +$433.0 million on September 18, per Farside Investors. The two sessions around the Fed decision took out $746.3 million; the two after it put back $592.5 million, leaving the week at a net +$6.1 million. 18

Polymarket's September ladder repriced across its whole range rather than at one strike. The $85,000 contract reached 100% after spot crossed it. The $87,500 contract rose 51.0 points to 66.5% and the $90,000 contract rose 30.4 points to 38.4% on $346,762 of weekly volume; the $95,000 and $100,000 contracts sit at 11.9% and 4.15%. On the downside, the $70,000 contract fell 16.25 points to 2.25% and the $65,000 contract 5.1 points to 0.9%. 5 10

Yes case (38.4% on $90,000): The flow series turned positive on September 17 and September 18, the two sessions in which spot climbed from $76,354.80 to $80,878.10, and the S&P 500 rose after the Fed announcement. $90,000 sits 5.2% above the September 21 morning price with the contract running to September 30. 12 17 18

No case (61.6% on $90,000): The two largest flow prints of the week were redemptions, the ladder only reached $85,000 for the first time on September 21, and the rally ran alongside a strengthening dollar and two-year yields that spiked to a two-year high on the decision. 13 18

Conditional trade inference: The September contracts resolve on Binance BTC/USDT one-minute highs, so the level rather than the trend settles them, and $90,000 requires another 5.2% before the month ends. Today's flow file is the trigger to watch: a third consecutive positive session would put the upper rungs of the ladder in play, while a return to redemptions would make $87,500 the first level to lose its support. For spot exposure, sizing crypto-equity positions to the flow series keeps the risk tied to the variable that actually moved this week.

Oil touched $105, then Aramco found a way around the pipeline

West Texas Intermediate settled at $105.83 on September 15, up 4.38% on the day and its highest close since May 19, after shipping sources said crude loadings at Saudi Arabia's Red Sea terminal at Yanbu had been suspended and Riyadh had cancelled some late-September cargoes to European buyers. Brent settled at $108.75, up 2.9%. 19 Polymarket's September $105 contract reached 100% as WTI cleared the threshold. 11

Saudi Arabia routed around the outage inside a week. Aramco raised shipments through the Strait of Hormuz by roughly 60 million barrels across September and October after halting some Yanbu liftings, and JPMorgan said in a September 18 note that Saudi oil moving through the strait averaged 2.9 million barrels a day over the prior six days, against 700,000 barrels a day in August. 20 By September 21, Brent for November had fallen 2.6% to $101.18 and the expiring October WTI contract 2.7% to $97.61, an 11-day low. 20

The escalation continued while prices fell. Houthi forces struck fuel storage at Riyadh's King Khalid International Airport on Saturday, September 19, and a Saudi Aramco facility at Yanbu, and Iran's central military command warned that any new American attack would bring sustained retaliation against US bases. 20 21 Trump said in a call with a Fox News reporter that Iran's leaders should make a deal, rot economically or be wiped out, and added that he would be open to meeting President Masoud Pezeshkian during this week's United Nations General Assembly. 21

The pipeline contract is where the week's uncertainty now sits. "Saudi Oil Pipeline (East-West) restarts by September 30?" fell 29.0 points to 31.5% on $342,583 of weekly volume, with $18,766 of liquidity against a 31¢ / 32¢ quote. It resolves Yes only if the Saudi government announces the pipeline is operating, and partial capacity qualifies; announcements describing work still under way, or operation expected later, fall outside the rule. 6 US Energy Secretary Chris Wright told CNBC on September 15 that oil should be flowing through the pipeline within days, while Goldman Sachs put repair assessments somewhere between "very soon" and eight weeks. 19

Around it, the physical measures remain where the blockade left them. The contract on Strait of Hormuz traffic returning to normal by September 30 sits at 0.55%; it needs IMF PortWatch to publish a seven-day moving average of transit calls at 60 or above. 22 Commodity vessel traffic through the strait fell to 4 on September 14 from 10 the day before, on Kpler preliminary data cited by Reuters. 19 Iran says it will not reopen the strait until the terms of the June agreement, as it reads them, are met. 21

Two contracts measure the war itself. "US x Iran ceasefire continues through September 30?", created on September 17, sits at 84.5% on $399,933 of weekly volume and resolves No if the United States carries out an air strike or surface-to-surface missile strike that hits Iran. 23 "Will the U.S. invade Iran before 2027?" sits at 16.5% on $1,506,705 of weekly volume and $678,935 of book liquidity, and resolves Yes if the United States begins an offensive to establish control over any part of Iran before December 31. 7

Yes case on a restart (31.5%): The 1,200-kilometre line is the kingdom's route to the Red Sea while Hormuz stays disrupted, Riyadh has already cancelled late-September cargoes to European buyers, and the US Energy Secretary said flows would resume within days. 6 19

No case (68.5%): The resolution rule requires a Saudi government statement that the pipeline is operating now, the Aramco rerouting through Hormuz removed the urgency that would produce one, and Goldman Sachs's repair window runs as long as eight weeks. 6 19 20

Conditional trade inference: The pipeline contract answers one narrow question — whether Riyadh says the line is running — and with $18,766 of liquidity it reads the physical situation better than it carries a position. Crude itself offers the wider expression. A restart announcement, or a Trump–Pezeshkian meeting that produces a framework, points at the mid-$90s and favours defined-risk downside structures on energy equities against upside on transport names. A missed September 30 deadline combined with a US strike would put the high side of the ladder back in play, where the $115 contract still trades at 3.15%. 6 11

Brazil's runoff is a tie in the polls and 60% on the board

Datafolha, polling 2,002 people between September 15 and 17, put Lula at 46% and Flávio Bolsonaro at 44% in a runoff, inside the poll's two-point margin of error — a technical tie, unchanged from the September 11 survey. In a first round, Lula led 39% to 36%, against 39% to 35% previously. Augusto Cury stood at 6%, Ronaldo Caiado 4%, Renan Santos 3% and Romeu Zema 2%. 24

A Quaest poll published September 14, with 2,004 interviews, showed Flávio ahead for the first time in the campaign at 42% to Lula's 40% in a runoff, also inside a two-point margin. In that survey Lula led the first round 36% to 31%. Disapproval of the Lula government held at 50% against 43% approval, and Flávio led among independent voters by 36% to 26% and in the Southeast by 47% to 31%. 25

Polymarket is far from a tie. The contract on Flávio Bolsonaro winning the election rose 8.8 points to 60.25% on $646,938 of weekly volume, with $253,042 of liquidity behind a 60.2¢ / 60.3¢ quote, while the Lula contract fell 8.0 points to 39.5% on $526,262. Both resolve on the winner including any second round, based on a consensus of reporting or the official count from Brazil's Superior Electoral Court. 8 26

Flávio case (60.25%): One poll now has him ahead in a runoff for the first time, his gains are concentrated among independent voters and in the Southeast, and the incumbent's disapproval has held at 50% with no improvement through the campaign. 25

Lula case (39.5%): Datafolha still has Lula ahead in both rounds, 39% to 36% in the first and 46% to 44% in the runoff, and Quaest also has him ahead in the first round by 36% to 31% even while its runoff measure favours Flávio. Both polls sit inside their margins of error, and 54% of Quaest's own respondents expected Lula to win. 24 25

Conditional trade inference: A 20-point gap between the board and two polls that bracket zero is the widest disagreement on this week's slate, and the October 4 first round settles it. Both polls put the two leaders in the 40s, short of the 50% of valid votes needed to win outright, so the priced risk is a campaign that runs past October 4, which keeps event risk in the real and in local-rate instruments elevated through the date. A trader who takes the polls at face value is buying the incumbent at 39.5¢; a trader who takes the board at face value is buying the challenger at 60.25¢.

What to carry into the next data window

United Nations General Assembly week: Pezeshkian is expected in New York and Trump said he would be open to meeting him. A framework for reopening Hormuz would hit the oil contracts before the shipping data. 21
Xi Jinping's state visit: Polymarket prices his arrival in the United States by September 23 at 99.1% on $402,258 of weekly volume, and NPR reported on September 17 that the leaders were still seven days from their meeting. The moratoriums on Chinese rare-earth export controls and on the US delay of chip-related export controls both expire on November 10. 27 28
Germany after the state elections: the CDU fell below the 5% threshold in Mecklenburg-Vorpommern for the first time and finished second in Berlin to the Left Party, which took 26%. Merz said he retains his party's backing while the CDU faces "fundamental and long-term questions"; the AfD won Mecklenburg-Vorpommern with 38.2% and is pressing for an early federal election, with the next one scheduled for 2029. 29 The contract on Merz leaving office before December 31 sits at 19.5% after $319,093 traded in 24 hours. 30
The Greenland agreement: Trump announced on September 18 that the United States, Denmark and Greenland had entered an agreement on a US military presence, with no expiry date and a bar on adversaries building bases. The contract pays only if both governments sign by December 31 and trades at 98.3%; Reuters reported that the extent of the agreement, including whether new bases will be built, remained unclear. 31 32
October 27–28 FOMC: the next policy meeting, six weeks after the first hike since 2023. 2

Public Polymarket records disclose probability, volume, liquidity, bids, asks, and spread for each contract. Those records do not identify authenticated net Yes-versus-No flow or a dependable list of large trades, so liquidity depth and quoted spread are the market-structure checks used throughout this recap. 9

References

1
Polymarket: Fed +25 bp after the October meeting
gamma-api.polymarket.com
2
Federal Reserve: FOMC meeting calendars
federalreserve.gov
3
Polymarket: no change after the October meeting
gamma-api.polymarket.com
4
Polymarket: Clarity Act signed into law in 2026
gamma-api.polymarket.com
5
Polymarket: Bitcoin reaches $90,000 in September
gamma-api.polymarket.com
6
Polymarket: Saudi East-West pipeline restarts by September 30
gamma-api.polymarket.com
7
Polymarket: Will the U.S. invade Iran before 2027
gamma-api.polymarket.com
8
Polymarket: Flávio Bolsonaro wins the 2026 Brazilian presidential election
gamma-api.polymarket.com
9
Polymarket: Fed Decision in October?
gamma-api.polymarket.com
10
Polymarket: What price will Bitcoin hit in September?
gamma-api.polymarket.com
11
Polymarket: What price will WTI Crude Oil hit in September?
gamma-api.polymarket.com
12
CNBC: Fed rate decision September 2026
cnbc.com
13
Reuters: Fed raises rates in search of a 'timelier' drop in inflation
reuters.com
14
Polymarket: Fed Decision in December?
gamma-api.polymarket.com
15
Polymarket: Fed decrease of 25 bp after the October meeting
gamma-api.polymarket.com
16
Reuters: US Senate fails to advance sweeping cryptocurrency bill
reuters.com
17
Kraken: BTC/USD daily OHLC
api.kraken.com
18
Farside Investors: Bitcoin ETF flow
farside.co.uk
19
Reuters: Oil settles $3 higher on Yanbu disruption
reuters.com
20
Reuters: Oil prices slide to 11-day low
reuters.com
21
Reuters: Iran and US trade threats after Houthi attacks
reuters.com
22
Polymarket: Strait of Hormuz traffic returns to normal by September 30
gamma-api.polymarket.com
23
Polymarket: US x Iran ceasefire continues through September 30
gamma-api.polymarket.com
24
Reuters: Brazil's Lula holds lead over Flavio Bolsonaro, Datafolha poll shows
reuters.com
25
Valor International: Flávio leads Lula numerically in runoff, new Quaest poll shows
valorinternational.globo.com
26
Polymarket: Lula wins the 2026 Brazilian presidential election
gamma-api.polymarket.com
27
Polymarket: Will Xi Jinping visit US by September 23
gamma-api.polymarket.com
28
NPR: Big questions loom ahead of China-U.S. summit
npr.org
29
DW: Germany's state elections in Berlin and Mecklenburg-Vorpommern
dw.com
30
Polymarket: Friedrich Merz out as Chancellor before December 31, 2026
gamma-api.polymarket.com
31
Reuters: US and Denmark reach deal on Greenland, Trump says
reuters.com
32
Polymarket: Trump x Greenland deal signed by December 31
gamma-api.polymarket.com