SpaceX market cap odds cluster in the $2.00 to $2.25T band

The SpaceX market cap contract on Polymarket is a bracket bet about the end of October, not a quote you can paste into a model. When the event page was opened on Oct. 2, 2026, the leading outcome row was "$2.00-$2.25T" at 34 percent, with a Yes price of 35 cents. The page's own FAQ text called that same outcome the leader at 35 percent. CoinRithm, opened the same day, printed a vig-adjusted 33.7 percent for the band. Three figures, one bracket.

TL;DR - Polymarket's header and outcome label put "$2.00-$2.25T" at 34 percent. The Yes button on that row was 35 cents, and the FAQ said 35 percent. CoinRithm's normalized price was 33.7 percent. - Total volume on the Polymarket page was $12,090. CoinRithm listed 24-hour volume of $733.2 and liquidity of $9.4K. This is a small book next to markets that show seven-figure volume. - CoinRithm's rules reprint says the figure is public market capitalization at the close of regular trading on the last trading day of October, using official closing prices and shares outstanding from filings. A value that lands on a boundary goes to the higher bracket.

What actually happened

The market was not born this week. Polymarket's page says it opened Aug. 24, 2026, at 7:15 p.m. ET, and that it ends Oct. 31, 2026. CoinRithm labels the open as Aug. 24, 2026, 11:15 p.m. UTC, which is the same 7:15 p.m. Eastern hour, and the resolution time as Oct. 31, 2026, 11:59 p.m. UTC. Seven outcomes were loaded.

The header strip ranked four bands: "$2.00-$2.25T" at 34 percent, "$2.25T+" at 26 percent, "$1.75-$2.00T" at 19 percent, and "$1.50-$1.75T" at 12 percent. The outcome rows, which are the cells this note treats as the market, were fuller and not always identical to those labels.

From the cheap side up, the loaded rows were: under $1.00T at 3 percent, Yes 5.0 cents, No 99.5 cents, volume $290; $1.00-$1.25T at 2 percent, Yes 3.0 cents, No 99.7 cents, volume $339; $1.25-$1.50T at 5 percent, Yes 7.3 cents, No 97.1 cents, volume $891; $1.50-$1.75T at 12 percent, Yes 13 cents, No 89 cents, volume $2,510; $1.75-$2.00T at 19 percent, Yes 21 cents, No 83 cents, volume $1,760; $2.00-$2.25T at 34 percent, Yes 35 cents, No 67 cents, volume $664; and $2.25T+ at 26 percent, Yes 26 cents, No 75 cents, volume $5,636.

Read the volume column before the percent column. The highest outcome volume is on "$2.25T+", at $5,636, not on the leading probability. The band the page calls the leader has $664 of outcome volume. A 34 percent label on a thin row is not the same object as a 34 percent label on a deep one. The page total was $12,090.

The FAQ on that page said the leading outcome was "$2.00-$2.25T" at 35 percent, followed by "$2.25T+" at 26 percent, and it said a share priced at 35 cents implies a 35 percent chance. That FAQ percent matches the Yes price. It does not match the 34 percent printed on the row and in the header. This article does not pick a winner between 34 and 35. It reports both, and it uses 34 in the header because that is the large number on the loaded outcome row.

CoinRithm said raw quotes summed above 100 percent and that it normalized them. Its leader was the same band, at 33.7 percent, down 1.5 points. Next were "$2.25T+" at 25.7 percent, "$1.75-$2.00T" at 18.8 percent and down 8.0 points, "$1.50-$1.75T" at 11.9 percent and down 0.5 points, "$1.25-$1.50T" at 5 percent and down 0.2 points, and "$1.00-$1.25T" at 2 percent. The under-$1.00T band was 3 percent, down 0.5 points. A 24-hour change was not shown on the $2.25T+ line or the $1.00-$1.25T line. CoinRithm's market quality score was 70 out of 100, the spread was 1.0 point, 24-hour volume was $733.2, liquidity was $9.4K, and the 7-day change was minus 5.0 points.

The SpaceX market cap label and the Yes price are allowed to disagree, and on this page they do. The Polymarket page also shows an experimental AI-generated summary. The page says that summary is not trading advice and plays no role in resolution. It includes share-price and history sentences this article does not repeat, because they are not outcome rows. The SpaceX market cap percent in the header of this file is the 34 on the leading row.

What the brackets actually measure

CoinRithm reprints the venue terms. The market resolves on Space Exploration Technologies' public market capitalization at the close of regular trading on the final trading day of the specified month. If the value lands exactly on a boundary, it resolves to the higher bracket.

The reprint says public market capitalization is the final official regular-hours closing prices of the listed equities on the primary exchange, for that last trading day, multiplied by total shares outstanding. If more than one share class exists, the calculation includes all outstanding classes and applies any stated conversion ratios to the publicly traded class. Where no conversion right exists, those shares are counted at the stated outstanding amount without a discount, unless official filings explicitly say otherwise. The share count comes from official company filings or disclosures, and the reprint gives SEC filings as the example.

That is an accounting instruction, not a vibe about a private round. It is the close on the last trading day, not an intraday print and not a headline valuation from a funding story. A number that sits on the line between $2.00T and the next band goes up, not down. The SpaceX market cap question is therefore sensitive to the share-count footnote, not only to the last trade.

The Polymarket extract used here showed the Rules heading and then market context: volume $12,090, end date Oct. 31, 2026, opened Aug. 24, 2026, at 7:15 p.m. ET, resolver beginning 0x69c47de9d. The bracket math above is CoinRithm's reprint. It says its paper-trading product uses its own rules, and that the venue terms are informational. If a word differs on Polymarket, Polymarket is the contract.

What Polymarket thinks

The loaded book thinks the end-of-October close is more likely to land in "$2.00-$2.25T" than in any other single band, at 34 percent on the row and 35 cents on the Yes button. It does not think that band is a near-lock. "$2.25T+" is 26 percent on both the header and the Yes price, and it holds the most outcome volume. "$1.75-$2.00T" is 19 percent on the label and 21 cents on Yes. The three bands under $1.50T add up to a small slice of the displayed percents, and their volumes are hundreds of dollars, not thousands, except the $1.25-$1.50T row at $891.

CoinRithm's adjusted stack is the same shape at different tenths: 33.7, 25.7, 18.8, 11.9. Nothing on either page says the bracket has already been decided. A $12,090 book can be pushed by a small order. That is a description of the volume figure, not a forecast.

For another October valuation screen that is not this contract, see the OpenAI October valuation note. For a sports book with a much larger crowd on a different question, see the World Series odds note. Neither one prices SpaceX, and neither one fills in the share count.

What to do as a reader (not a trade)

This is not investment advice. A percent on a bracket is not a target price, and it is not a reason to buy or sell a share. The SpaceX market cap rows are a snapshot of a thin market on the day the pages were opened.

If you cite them, cite the band, the percent, the Yes price, and the site. Say whether the number is raw or vig-adjusted. Do not import sentences from the experimental summary into the same paragraph as the rows. If you care about the resolution, read the boundary rule and the share-class rule before you argue about a round trillion.

The two opened pages are Polymarket's SpaceX market-cap market and CoinRithm's adjusted odds and rules reprint. The first is where the 34 percent row and the 35 cent Yes were loaded. The second is where 33.7 percent and the filing-based definition were printed.