ProphetX Wants Traders to Bet on How Much Polymarket US, Rothera and DKeX Trade

ProphetX wants to let people bet on how much trading happens on other prediction markets.

In three self-certification submissions this month, the exchange proposed binary contracts tied to November event-contract volume at Polymarket US, Rothera and DKeX. 

Instead of predicting an election or a game, traders would take a position on whether those exchanges clear specified monthly volume thresholds.

It is a new layer of speculation on the industry itself. But the filings are considerably more precise than “betting on how much will be bet.”

They measure reported notional trading volume, not customer deposits, exchange revenue or the cash traders actually spend.

Three exchanges, three thresholds

Each filing covers one specific contract, not an unrestricted template for new markets.

A total exactly equal to the threshold resolves to “No.” The qualifying volume must exceed it.

All three contracts are fully collateralized, have a $1 settlement value for the winning side and trade in one-cent increments between 1 cent and 99 cents. Each lists a position-accountability level of 25,000 contracts per participant per strike.

The submissions say the contracts may be listed no earlier than one business day after the Commodity Futures Trading Commission receives them, and no later than Nov. 30. They are self-certifications, not announcements of affirmative CFTC approval or proof that trading has begun. 

ProphetX also said none of the referenced exchanges or their affiliates have endorsed the contracts or are a party to them.

What the volume actually measures

ProphetX will calculate volume by multiplying the reported number of event contracts traded by their notional value. That value defaults to $1 per contract unless the source identifies a different amount.

For example, 1 million trades in $1-notional contracts would contribute $1 million to the reference total regardless of the prices at which those contracts changed hands. The figure measures trading turnover, not necessarily $1 million of new customer money.

The venue boundaries are equally important. The Polymarket contract explicitly excludes the separate non-U.S. platform. The DKeX contract excludes activity on other exchanges, even if DraftKings or an affiliate makes those contracts available to its customers.

Rothera has an additional counting detail: It reports one contract for each matched pair of YES and NO positions, rather than one for each side. ProphetX will adopt that convention without doubling or otherwise adjusting the number. It also will not add Rothera’s separately reported block-volume figure unless that activity is already included in the main volume field.

Those distinctions could decide the payout. A headline about a company’s overall activity is not necessarily the number these contracts will settle against.

Settlement depends on published data

The primary sources are the exchanges’ own public daily volume reports. ProphetX will use specified trade-level records or historical files as backups, followed by narrowly defined public announcements if necessary. Rounded figures, partial totals or figures reported on the wrong basis will not qualify.

Polymarket US and DKeX use the November calendar month in Eastern Time. Rothera uses sessions bearing November trade dates, which begin at 4 p.m. Central Time on October 31 and end at 3:59:59 p.m. Central Time on November 30. ProphetX’s Rothera contract closes when that final session ends.

For all three, ProphetX will determine the reference total at 5 p.m. Eastern Time on the second business day after the reference period ends. Corrections published before that cutoff count. 

Later restatements do not change the outcome or trigger a new settlement.

The filings also acknowledge that summary reports and trade-level backups may differ because daily reports exclude transfer and office trades. Those are not interchangeable sources without consequences, particularly if a discrepancy puts the total on opposite sides of a threshold.

If usable data disappears and the outcome cannot be determined, the terms provide for voiding the contract and returning collateral. ProphetX says it will publish the final reference volume and supporting settlement information.

Guardrails against moving the number

The obvious concern is that someone trading a volume contract could also generate volume on the referenced exchange.

ProphetX expressly prohibits transactions undertaken to push the reference total above, or keep it below, the threshold, or otherwise affect the contract’s price or settlement. It also bars relevant exchange personnel, people holding material nonpublic information about volume or reporting, and specified family and household members.

DKeX’s restrictions go further by explicitly covering people with confidential information about expected order flow obtained through market-making, liquidity, routing or distribution arrangements. The filing notes that DKeX’s order flow is concentrated through an affiliated distributor.

These restrictions address who can trade and what they can do. They do not turn settlement into an independent audit of the reference exchange. ProphetX says it will use the published figures without discretionary adjustments or exclusions based on counterparties, contract categories or trading protocols.

That is the central tension: The calculation is designed to be mechanical, while enforcement must address attempts to manipulate the activity feeding it.

A market on the market

ProphetX said it intends to use each contract as the foundation for a subsequent venue-specific series with different thresholds and months. That would require further certification, as these filings alone do not authorize every possible variation.

For traders, the attraction is straightforward. They let traders express a view on an exchange’s activity without taking a position on every event it lists. It is not a bet on that company’s profit or valuation, but on a carefully defined measure of turnover.

Prediction markets already turn news into tradable outcomes. ProphetX’s proposal turns their own growth story into one, and makes the fine print behind “volume” part of the bet.