The one-day rule
A licensed U.S. exchange can launch a brand-new event market in about one business day — not by asking the regulator, but by certifying its own compliance. That power, and the veto the regulator keeps in reserve, is the machinery behind every prediction market that matters. Here's how it works, who has it, and what it would take to build in Vietnam.
Two days ago, on June 10, the U.S. derivatives regulator proposed a new rule on which event contracts an exchange is allowed to list — sports scores and season outcomes likely yes, single-play wagers and injuries likely no.3 The headlines read it as a verdict on sports betting. The more useful thing to notice is the question hiding underneath it: who decides what gets listed in the first place? Because the surprising answer — the one that explains how a startup put thousands of live markets on the board, and why an offshore giant worth more than all of them still can't — is that, most of the time, the exchange decides, and it decides on one day's notice.
We've argued before that an event contract is a derivative, not a wager, and that in Vietnam the only open lane to operate one runs through the commodity-exchange door. In that piece we said a derivative lists "by self-certification, not by permission," and moved on. This piece is about the four words we skipped. Self-certification is the quiet machinery of the entire category — the reason a licensed venue is fast and an unlicensed one is stuck — and it is worth understanding in full, because whoever wants to build this in a new country has to rebuild exactly this.
List by certification
Start with the assumption almost everyone brings, because it's wrong. People assume that to list a financial product, an exchange submits it to the regulator and waits for approval. For most of what trades on a U.S. derivatives exchange, that is not what happens. Under the Commodity Exchange Act, a licensed exchange — a Designated Contract Market, or DCM — may list a new contract by filing a self-certification: a signed statement that the contract complies with the Act and the regulator's rules.1 No prior approval. The exchange certifies its own homework, and the contract goes live.
The timing is the part that surprises people. The rule requires only that the regulator receive the filing by the open of business on the business day before the contract lists.1 File today, trade tomorrow. There is a slower, voluntary path — an exchange can ask the regulator to formally approve a product, which starts a 45-day review clock that can be extended — but for event contracts almost nobody uses it, because the whole advantage of the category is being able to put a market on tonight's question up before tonight.1
This looks like a loophole. It isn't. It's a bargain, and the bargain is the whole point of being licensed. A DCM is a self-regulatory organization: in exchange for the right to list products itself, it takes on the legal duty to police its own market — to list only contracts "not readily susceptible to manipulation," to surveil trading, to keep records the regulator can pull at any time.2 Self-certification is the exchange internalizing the regulator's judgment and signing its name under it. Speed is what you get for becoming a credible regulator of yourself. That is why it's a privilege of the licensed, and not a thing an offshore book can simply choose to do.
The veto the regulator keeps
Filing your own certificate is not the same as the regulator looking away. The certificate is a promise, and the regulator can call it in. For one specific category — event contracts — the Act writes that power down explicitly. A contract may be barred if the regulator finds it "contrary to the public interest," and the statute names the cases where it can: a contract that involves activity unlawful under any state or federal law, or that involves terrorism, assassination, war, or gaming — plus a catch-all for "other similar activity" the regulator defines by rule.2
activity
+ similar, by rule
So the real shape of self-certification is an asymmetry. The exchange controls the speed of going live; the regulator keeps the power to undo it — to open a 90-day review, demand the market be suspended while it looks, and at the end approve the contract or prohibit it outright.2 Even short of that, it can stay a self-certified listing the moment it suspects the certificate was false, or petition to rewrite the contract's terms — a reminder, issued to every exchange in a March 2026 advisory, that the certificate is a promise the regulator can always call in.2 Listing speed is not the same as regulatory finality. And the single most contested word in that list of bars — gaming — is where the whole category nearly died, and then didn't.
It is also exactly the word the regulator was arguing about this week. The June 10 proposal doesn't touch the one-day mechanism; it tries to draw, contract by contract, where the "public interest" line falls for sports — proposing that a market on a final score or a season-long record can stand, while a market on a single play, an injury, or an officiating call probably can't.3 It is a proposal, not a settled rule, and it follows a year of the agency reversing itself: a 2024 plan to ban political and sports contracts wholesale was withdrawn in early 2026 under new leadership, replaced first by a request for comment and now by this.3 That whole about-face — from a 2023 order branding these contracts "gaming" to a 2026 advisory calling them a financial asset class — is its own story. Here the point is narrower. The mechanism is stable. The line inside it is still being drawn.
Kalshi: one template, a thousand markets
To see the engine run, watch the venue that built itself around it. Kalshi won a federal contract-market license in 2020 and, four years later, stood up its own clearing house — the two registrations that make it a full exchange.4 What it does with the one-day rule is the part worth studying. Kalshi rarely self-certifies a single market. It self-certifies a template — a contract with the specifics left as blanks, like Will <team> win <title>? — and then fills in the blanks to spin up concrete markets without filing again for each one.4 One certification becomes a category; a category becomes hundreds of live questions. The company has said outright that it certifies more markets than it ever bothers to list.4 That leverage now carries a caveat the regulator wrote down in March 2026: its market-oversight staff cautioned that an overly broad template — one that waves at many different underlying events, or settles on a source still to be named — can fail the very manipulation test the certificate is supposed to vouch for, and told exchanges to pin down a reliable settlement source for each permutation up front.4
That scale is also what made Kalshi the test case for the regulator's veto. In 2023 it self-certified contracts on which party would control Congress. The regulator opened the public-interest review, then issued an order disapproving them — the contracts, it argued, involved gaming and activity unlawful under state law, and were contrary to the public interest.5 Kalshi sued its own regulator. In 2024 a federal court vacated the order, holding that an election is not a "game" in the ordinary sense of the word; the contracts went live and traded through the November election, and in 2025 the agency dropped its appeal and let the ruling stand.5 The veto fired, and lost.
The fight has since moved one level out. Kalshi self-certified sports contracts in early 2025, and this time the pushback came less from the federal regulator than from state gambling commissions, which sent cease-and-desist letters arguing these were unlicensed sportsbooks. In April 2026 a federal appeals court sided with Kalshi — the first to hold that the federal commodity law preempts state gambling law for contracts on a licensed exchange — though it ruled only at a preliminary stage, and parallel cases in other circuits had not yet been decided.6 The argument is no longer "may the exchange list it." It's "may a state stop what the exchange has already self-certified." That is a measure of how much ground self-certification quietly won.
None of this makes the category pure forecasting infrastructure today. Since sports contracts launched, sports has been the large majority of volume on the biggest U.S. venue.4 The argument here is about the mechanism — how a regulated contract gets listed and policed — and where it's going, not a claim that most of what trades today is civic information. Keep the two separate.
Who gets to certify
If self-certification is a privilege of the licensed, then the license is the whole story of who can do it. And here the contrast that matters most isn't Kalshi versus a rival — it's Kalshi versus Polymarket, the larger book that for years couldn't touch the mechanism at all. Polymarket's dominant exchange runs offshore, out of Panama, with no U.S. license; it doesn't self-certify contracts, because there is no regulator it is certifying to.7 It lists what it likes, outside the system, and blocks U.S. users at the door. When it finally moved to come onshore in 2025, it couldn't self-certify its way in either — it had to buy a company that already held the licenses, paying roughly $112M for a registered exchange and clearing house.7 Even then, owning the engine was not the same as running it: a year on, the U.S. relaunch was still rolling out behind invitations and a single app.7
That is the deeper reason the license is the moat. Two pieces make a venue able to self-certify and stand behind what it lists: the exchange itself (the DCM, which lists and matches) and a clearing house (a derivatives clearing organization, or DCO, which holds the margin and guarantees settlement). The venues that own both are vertically integrated and answer to no outside clearer about which contracts they're willing to back. The ones that own only the exchange rent their clearing — which is leverage someone else holds.
The field is filling in fast — Interactive Brokers' ForecastEx, Crypto.com's Nadex, CME, DraftKings, Underdog — and the split runs cleanly along that line. Kalshi, Polymarket's U.S. entity, ForecastEx, Nadex, CME, and Underdog's exchange own both halves.8 Coinbase's derivatives exchange and DraftKings' both list contracts but clear through someone else's house.8 All of them, to put a market up, do the same thing Kalshi does: file a certificate and wait one day. The offshore book is the only one in the picture that can't — and that single fact is why it had to spend nine figures to buy its way to a thing a license grants for free.
What one listing actually involves
Step inside a single contract, because "self-certify a template" hides real work. Listing one event contract — done properly, the way a regulator can later defend — runs through five steps, and only the fourth is fast.
The hard part is hiding in step one, in the word source. Every event contract needs a settlement rule — a pre-named, public, hard-to-game authority that decides yes or no when it expires. A market on a Fed decision settles on the Fed's own statement; a market on a game settles on the final score. Pick a flimsy source and the contract fails the manipulation standard in step two and shouldn't be certified at all. This is the same problem we've called the resolution bottleneck: the easy half is the price, and who decides what's true is the rest. Self-certification doesn't remove that judgment — it puts the exchange's own name under it. The certificate is, in the end, a promise about step one.
The same engine, a different regulator
Now carry the machine to Vietnam, because the point of understanding it is to know what would have to be rebuilt. We've made the larger case elsewhere: of the four rulebooks a prediction-market exchange could be read under here, three are shut — securities by state monopoly, gambling by design, the crypto pilot by wrong-asset-type — and the one open door is the commodity exchange, regulated by the Ministry of Industry and Trade, whose December 2025 financial-center decree already mandates the exact exchange-plus-clearing-subsidiary structure a U.S. venue runs.9 The structure ports. The question this piece raises is narrower and more practical: once you hold that license, how does a single contract get listed?
The honest answer is that the listing process is the part Vietnam hasn't written yet — and that's the work. The decree builds the venue; it does not yet define a one-day self-certification lane for novel contracts, and no event outcome is a listed commodity here today. But the pieces a listing regime needs all have an analog already sitting in the framework, which is what makes this a mechanism rather than a wish.
Read the right column and the gap is clear but narrow. The regulator already supervises commodity derivatives, so the leap — from a contract on the price of steel to a contract on a verifiable outcome — sits inside its competence, not outside it. The list of listable things was written explicitly open-ended, already reaching intangible, NFT-represented assets.9 What's missing is the listing lane itself: a defined process by which the exchange proposes a contract, the regulator supervises it, and the clearing subsidiary stands behind it. That is a thing a regulator grants, and the right first venue to ask for it is a controlled pilot — a single, surveilled, participation-limited market that reframes the request from "approve a permanent gambling-adjacent product" to "supervise one risk-controlled test of a financial contract." Until that happens, the gambling-classification risk is live and should be named plainly, not waved away. This is a thesis with a mechanism, not a settled fact.
The same lens travels across Asia. Most of the region routes an event contract to a gambling regulator by default, where the answer is no. The places where this can be built are the ones with a commodity-derivatives authority that could plausibly hold the instrument — which is exactly why the boring, structural question, "which regulator already owns derivatives here," predicts more than any headline about whether prediction markets are "allowed."
Why the plumbing is the moat
It is tempting to file self-certification under plumbing — the dull procedural layer beneath the interesting product. That is the mistake. The one-day rule is the product. It's why a licensed venue can be on tonight's question tonight while an unlicensed one, however large, is stuck filing acquisitions and fighting injunctions. It's why compliance in this category isn't a department but a shape: an exchange, a clearing house, a surveillance desk, and the certificate that ties them together into something a regulator will let move fast.
And going fast, in a winner-take-most category, is most of the prize — the first venue that can list credibly tends to keep the market. That is the whole reason the listing engine is worth this much attention in a country that hasn't built it yet. Seeker's work sits in that gap, and we'll say plainly what we always do: there is no licensed exchange live, and the license is the goal, not a claim. What we believe is narrower. Every country eventually draws this line; it runs through whichever regulator already owns the instrument; and the venue that shows up at that regulator's door with the full machinery — exchange, clearing, surveillance, and a certificate it can stand behind — is the one that gets to list first. The one-day rule is what it's all built to earn.
- Self-certification authority: Commodity Exchange Act §5c(c), 7 U.S.C. § 7a-2(c). Listing products by certification: 17 C.F.R. § 40.2 — the Commission must receive the submission "by the open of business on the business day preceding" the product's listing, with a certification that the product complies with the Act and Commission regulations plus a concise explanation and analysis. Voluntary approval: 17 C.F.R. § 40.3 — a 45-day review period, extendable by up to 45 more days or by agreement. Rule self-certification (10 business days): 17 C.F.R. § 40.6. Cornell Legal Information Institute / eCFR.
- Event-contract "special rule": CEA §5c(c)(5)(C), 7 U.S.C. § 7a-2(c)(5)(C) — the Commission may find a contract "contrary to the public interest" if it involves activity unlawful under any federal or state law, terrorism, assassination, war, gaming, or "other similar activity" determined by rule; such a contract "may [not] be listed or made available for clearing or trading." Implemented at 17 C.F.R. § 40.11, which provides for a 90-day review and a request to suspend listing/trading during the review. DCM listing standard ("not readily susceptible to manipulation"): CEA Core Principle 3, 7 U.S.C. § 7(d)(3); 17 C.F.R. Part 38. The Commission also retains authority to stay a self-certified listing pending proceedings for a false certification, or a petition under CEA §8a(7) to alter or amend a contract's terms — reaffirmed in CFTC Letter 26-08, DMO "Prediction Markets Advisory" (Mar. 12, 2026).
- CFTC, "Event Contracts Involving Enumerated Activities," notice of proposed rulemaking (Press Release 9249-26, June 10, 2026) — proposes to amend Regulation 40.11 and add an Appendix F, codifying a contract-by-contract public-interest framework and a 90-day review; takes the position that sports contracts on final scores, win/loss, and season-long metrics may be permissible, while contracts on a single play, injuries, or officiating decisions are more likely contrary to the public interest. A proposal, not a final rule. It follows the February 2026 withdrawal of the May-2024 event-contracts proposal and a March 2026 advance notice, under Chairman Michael Selig. Federal Register / cftc.gov; contemporaneous reporting (Axios, ESPN).
- CFTC designated KalshiEX LLC a Designated Contract Market in November 2020; Kalshi Klear LLC registered as a Derivatives Clearing Organization in August 2024 (CFTC press releases). Kalshi lists by self-certification under Rule 40.2, typically the next business day, using templated contracts with variable placeholders (e.g. "Will <team> win <title>?", filed Jan 22, 2025, listed Jan 23, 2025 — CFTC Part 40 product filing); the company has stated it certifies markets it does not ultimately list. Several thousand live markets as of early 2026. Sports has been the large majority of Kalshi volume since sports contracts launched. A March 2026 DMO staff advisory (CFTC Letter 26-08, "Prediction Markets Advisory") cautioned that overly broad templates with many permutations, or settlement on "yet-to-be-determined" sources, may not satisfy the Core Principle 3 "not readily susceptible to manipulation" standard, and urged exchanges to specify a reliable settlement source for each permutation.
- Kalshi self-certified congressional-control contracts in 2023; the CFTC opened a Regulation 40.11 review and then issued an Order of Disapproval (Sept 2023), arguing the contracts involved "gaming" and activity unlawful under state law and were contrary to the public interest. KalshiEX LLC v. CFTC (D.D.C. 2024) vacated the order, holding that an election is not "gaming"; the D.C. Circuit declined to stay the ruling and the contracts went live and traded through the November 2024 election. The CFTC dismissed its appeal in May 2025, leaving the ruling intact. CFTC press releases; court opinions; contemporaneous reporting.
- Kalshi self-certified sports event contracts in early 2025; multiple state gaming regulators issued cease-and-desist orders. KalshiEX LLC v. Flaherty (3d Cir., Apr 6, 2026, 2–1) — the first federal appellate ruling that the Commodity Exchange Act preempts state gambling law for sports event contracts on a CFTC-registered exchange, decided at the preliminary-injunction stage. Parallel appeals in the Ninth and Fourth Circuits had been argued but not decided as of mid-2026. Law-firm analyses (Holland & Knight, Skadden); CoinDesk.
- Polymarket's dominant exchange is operated offshore (out of Panama), outside CFTC oversight and with no U.S. license; it does not self-certify and blocks U.S. users (a 2022 CFTC settlement, $1.4M, required it to wind down U.S.-facing markets). To come onshore it acquired QCEX — QCX LLC, a CFTC-designated DCM, and QC Clearing LLC, a registered DCO — for roughly $112M (closed July 2025); the CFTC granted narrow no-action relief in September 2025. As of mid-2026 the U.S. relaunch remained limited (invite-only into 2026; initially a single mobile platform). See Seeker Labs, "The market knew" and "The commodity door" (2026), and contemporaneous reporting.
- CFTC Designated Contract Market and Derivatives Clearing Organization registries. Vertically integrated (own both exchange and clearing): KalshiEX + Kalshi Klear; QCX + QC Clearing (Polymarket US); ForecastEx LLC (Interactive Brokers; one entity holds both, "Forecast Contracts" via ForecastTrader, 2024); Nadex (Crypto.com/Foris; self-clears); CME + CME Clearing (event-contract product; "FanDuel Predicts," Dec 2025); Aristotle Exchange DCM + DCO (acquired by Underdog, 2026). Exchange-only, clearing through a third party: Coinbase Derivatives (clears via Nodal Clear); Railbird Exchange (acquired by DraftKings; clears via Bitnomial). Registration dates per the CFTC registries.
- Resolution 222/2025/QH15 (International Financial Center) and Decree 330/2025/NĐ-CP on the Center's Commodity Exchange, proposed by the Ministry of Industry and Trade: mandates an exchange plus a clearing-house subsidiary, sets minimum charter capital (VND 1,500 billion for the exchange + VND 500 billion for the clearing house, on the order of $80M combined), caps foreign ownership at 49%, and permits commodities "including but not limited to" agricultural products, energy, metals (excluding gold), carbon credits, and cultural/artistic products represented as digital assets using NFT technology. Domestic regime: Commercial Law (No. 36/2005/QH11) and Decree 158/2006/NĐ-CP (as amended). See Seeker Labs, "The commodity door" (2026), for the full four-door analysis.