Kalshi launches US 500 stock index perpetual futures after CFTC approval

Kalshi, a CFTC-registered designated contract market, launched a perpetual futures contract tracking the US 500, the MerQube US Large Cap Index (tickers MQ5C and .MQ5C), and in doing so became the first US venue to offer a stock index perpetual under formal federal oversight. The contract carries the funding-payment mechanism that has dominated offshore crypto trading into the heart of US large-cap index exposure, and it competes directly with CME and ICE for that business while reopening a classification fight the exchanges have already taken to court.

A regulated US venue now trades the funding model that built offshore crypto

The product, submitted voluntarily for Commission review on August 18, 2026, was deemed approved by the CFTC on October 2, 2026, under Regulation 40.3. The contract is tracked to the roughly 500 largest US-listed and US-domiciled companies by float-adjusted market capitalization, it is cash-settled, it has no expiration date, and each contract has a notional value equal to the index level times a multiplier of US$1.00 per index point, per Kalshi’s product filing. Trades are centrally cleared by Kalshi Klear as central counterparty, with settlement guaranteed by operation of novation.

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The structural break from a conventional futures contract is subtle and important. A traditional E-mini or Micro E-mini settles on a dated expiration, so its price is pinned to the underlying at that moment. A perpetual has no such anchor date. Instead, at regular intervals, holders of the side trading at a premium to the reference index pay holders of the side trading at a discount, which is the funding payment that keeps the contract tethered to the underlying. In this case those payments are made daily, the mechanism that substitutes for convergence to a settlement date.

That is the exact structure that powered the offshore crypto perpetual market, where venues built huge open interest on contracts that never expire and funding rates carry the cost of leverage. Bringing it to a CFTC-regulated exchange, with a registered DCM and a registered derivatives clearing organization on the other side of every trade, is the core of the development. The Commission's Division of Market Oversight also issued a conditional no-action letter on the same week, dated October 3, 2026, responding to a request from Coinbase Derivatives, that lets designated contract markets remove the expiration dates from existing perpetual-style broad-based security index futures and convert them into true perpetuals with no expiry. That relief, set out in CFTC Letter No. 26-29, expires on October 20, 2026, which is the next dated catalyst.

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Why this is a competition story, not just a product story

Kalshi's move puts a federally supervised exchange in the market for large-cap US index exposure that has been the province of CME and ICE. Those exchanges already trade dated index futures with national market centers and decades of liquidity. A perpetual's selling point is capital efficiency: no expiration means no need to roll, and positions can be opened with the margin the funding mechanism demands rather than the margin a dated contract settlement requires. Kalshi's filing describes fractional positions as small as one ten-thousandth of a contract, which lowers the practical entry size materially.

The contested regulatory backdrop matters as much as the product. CME has sued the CFTC over the Commission’s earlier authorizations of crypto perpetuals, arguing those contracts are swaps rather than futures, per Reuters via Investing.com. That litigation frames the same classification question the equity-index authorization now raises: whether a contract without an expiration date, settled by periodic funding payments rather than by convergence on a settlement day, is a futures contract at all. The courts will resolve the crypto case, but the reasoning will bear directly on this new equity-index product, because it is structurally the same instrument applied to a broad-based security index.

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The bull case for the market is straightforward and worth taking seriously. Central clearing, a registered venue, and federal oversight bring a product that already trades at enormous global scale into a regulated pool, which can concentrate liquidity, compress spreads, and give participants a single venue for a position they previously had to build offshore or roll across dated contracts. The Commission's no-action positions, limited as they are to the removal of expiration dates from existing perpetual-style contracts, are a signal that the agency is willing to accommodate the structure within its futures jurisdiction where the product fits a broad-based security index.

The bear case is equally real. The classification uncertainty is not hypothetical, and the October 20 expiry of the no-action relief is a hard date on which the permissive treatment lapses unless renewed. If a court rules the exchanges' way, the product and its siblings would face reclassification questions that could unwind months of open interest. Funding mechanics also introduce a new cost surface that dated-index traders do not manage, because a persistently stretched funding rate is a recurring expense that a roll cost only approximates. And Kalshi is starting at a liquidity disadvantage measured against CME and ICE; early open interest, which Finance Magnates reported at roughly $219,600 with about $556,000 in 24-hour volume on the launch day, is trivial next to the notional that trades in a single CME session.

Related reading: Illinois Sports-Contract Rules Blocked on Swaps Finding.

What to watch

The first line to watch is October 20, 2026, when the CFTC's no-action positions expire. The second is the litigation over the crypto perpetuals, whose outcome will set the precedent this contract inherits. The third is depth: whether the US500 builds open interest toward the levels that make a perp a genuine rival to dated index futures, or whether it remains a niche product for a venue better known for event contracts.

None of this is a recommendation in either direction. The market is telling us how it prices a regulated US index perp on day one, and the next two months will show whether the funding mechanism and the futures classification can coexist on a federal exchange. The resolution of those two questions is the development to grade.