The bitcoin noon contract that went from 92% to 6% in a day

Twice in two weeks, a rung on Polymarket's bitcoin noon ladder printed near 90% in one morning's issue and near zero in the next. The $80,000 rung was 88% in the September 4 issue and 7% in the September 5 issue. The $78,000 rung was 92% on September 14 and 6% on September 15. Neither move was a mispricing of bitcoin. Both were a mispricing of the contract, which pays on one number at one moment, not on where the coin has been.

What the market said

The ladder asks whether bitcoin is above a strike at noon ET on a given day. The September 3 issue had the $78,000 rung at 71% (+54) after the coin hit a $78,450 high, and noted that "the coin was above the threshold with hours remaining, but the contract still depended on the noon print."

The next day the coin cleared $80,000 after Governor Waller signaled he could support a hold, touching $82,016 and force-closing $415M to $510M of bets against the coin. The September 4 issue had the $80,000 rung at 88% (+80) and the $78,000 sibling at 99.1% (+55.2). The September 5 issue then reported that the 162,000 jobs print "knocked Bitcoin below $80K; the market on Bitcoin holding above $80,000 today cratered 73 points to 7%."

The same shape repeated. The September 14 issue had the coin trading as high as $78,703.80 and sitting near $78,393 on OKX, which pushed the $78,000 rung from 26% to 92% (+66) while the $80,000 rung faded to 0.5%. Kalshi's finer ladder had $78,800 or above at 15%. The issue added that "a few hundred dollars of drift before noon decides these payouts." On September 15, the coin opened near $78,181 and slid to about $77,000, "dragging the noon above $78,000 contract to 6% (−50.4)."

What happened

Bitcoin did what a 37% to 51% volatility asset does in a few hours: it moved half a percent the wrong way. The September 16 issue quoted Deribit's implied volatility at 37% annualized, and the September 3 issue had it at 51%. At either number, a cushion of a few hundred dollars over a $78,000 line is not a 92% proposition for a print several hours away.

Compare the touch markets on the same board. The September 10 issue had "Bitcoin dips to $77,500 in September" at 95% (+7.4) with the coin at $77,770, because that contract pays if the price touches the strike at any point in the month. A touch contract at 95% with the coin a few hundred dollars from the line is priced correctly. A noon-print contract at 92% with the same cushion is not. The touches versus closes-above guide covers the general rule; this is what it looks like with money on it.

A worked example

Take the $78,000 rung on the morning of September 14, at 92% with spot quoted near $78,393. The cushion is $393, or 0.5% of the price.

Input	Value	Source
Strike	$78,000	Sep 14 issue
Spot at send	$78,393	Sep 14 issue
Cushion	$393, or 0.5%	arithmetic
Implied volatility, annualized	37% to 51%	Sep 16, Sep 3 issues
Daily volatility	37% ÷ √365 ≈ 1.9%; 51% ÷ √365 ≈ 2.7%	arithmetic
Four-hour volatility	1.9% × √(1/6) ≈ 0.8%; 2.7% × √(1/6) ≈ 1.1%	arithmetic
Cushion in standard deviations	0.5 ÷ 0.8 ≈ 0.6; 0.5 ÷ 1.1 ≈ 0.5	arithmetic

A move of half a standard deviation or so against you happens roughly 30% of the time. A fair price for the rung with four hours to go was therefore somewhere near 70%, not 92%. A trader who bought 100 YES at 92% paid $92 to win $8, a payoff that needs the coin to hold above the line more than 92 times in 100. The next issue had the coin near $77,000 and the contract at 6%. A NO buyer at 8% paid $8 for a contract the same issue priced at 94%.

Polymarket has historically charged no trading fee on most markets, as of September 2026, so this arithmetic has no fee line. Check the venue's own page before relying on it. The Polymarket guide has the mechanics.

The fine print that mattered

Three words do the work: "at noon ET." The contract does not care that bitcoin touched $82,016 on September 4 or $78,703.80 on September 14. It reads one price from one named source at one timestamp. The editions quote OKX and Deribit for spot; the contract's own rule names the feed that pays, and the two need not match to the dollar. How settlement works puts it as "the rule names a source and a moment," and the noon ladder is the purest example on either venue.

It also helps to know which family a contract belongs to. The bitcoin daily price tracker follows the noon ladder. The bitcoin $100K tracker, which sat at 6.5% on September 3 and 2.5% on September 16, covers a different question with a different clock.

The lesson

A price of 92% on a contract that settles in hours is a claim about the next few hours, not about the last few. On both September 4 and September 14 the ladder was pricing the morning's rally as if it were already the noon print. The price versus probability guide makes the general case: the number is the market's estimate, and estimates made from a fresh high are made at the worst moment.

Second, the same board carries touch contracts and print contracts at the same strikes, and they are not interchangeable. A 95% touch and a 92% print looked like the same confidence. One was earned by the rule; the other was borrowed from the chart.

What it settled on

The $80,000 rung stood at 7% in the September 5 issue and the $78,000 rung at 6% in the September 15 issue, each after the coin slipped below the strike the previous morning's tape had treated as cleared. Each contract settles on a single noon print from its named source, and nothing before that timestamp counts. The venue's settled record is where to confirm the final outcome; the editions report the price, not the verdict.

Nothing on this page is investment advice; the venue's current rule text and fee page are the only things that pay.