SEO description: Kalshi launched US500PERP after CFTC approval, adding a no-expiration U.S. equity-index perpetual to a regulated exchange.

Tags: Kalshi, CFTC, CME Group, Coinbase Derivatives, US500PERP, MerQube

Market platform: Kalshi

Category: Regulation

Kalshi began trading its US500PERP contract on October 6, 2026, after CFTC product records showed approval on October 3. KalshiEX LLC filed the contract on August 18. The cash-settled product tracks the MerQube US Large Cap Index and brings a no-expiration equity-index perpetual structure onto a CFTC-regulated exchange.

The launch matters because perpetual futures, long associated with offshore crypto venues, are moving into regulated U.S. derivatives markets and into asset classes beyond bitcoin. Kalshi’s filing places the product inside a central-clearing and margin framework, while CME Group is challenging the CFTC’s treatment of perpetual futures in federal court.

What is Kalshi’s US500PERP contract?

US500PERP is a perpetual futures contract tied to the MerQube US Large Cap Index, an index designed to track 500 large U.S.-listed, U.S.-domiciled companies weighted by float-adjusted market capitalization. Unlike a traditional quarterly equity-index future, the contract has no scheduled expiration date.

Kalshi’s August 18 submission to the CFTC describes a standardized, cash-settled contract cleared through Kalshi Klear. The filing says participants can exit positions through offsetting trades, and that the contract uses margin requirements rather than full notional prepayment.

The contract’s economic design relies on a daily funding process. If the perpetual trades above or below the reference index, funding payments are used to pull the contract price back toward the index level. That structure is common in crypto perpetual markets, but its use for regulated U.S. equity-index exposure is still new.

Key terms in Kalshi’s filing include:

  • A $1 multiplier per index point and a $0.05 minimum tick
  • Fractional positions as small as 0.0001 contracts
  • Trading from Sunday 6 p.m. ET through Friday 5 p.m. ET
  • Index calculation during regular U.S. equity-market hours
  • Daily funding determined at 4 p.m. ET on each index business day
  • Clearing through Kalshi Klear under a risk-based margin model

The contract gives holders price exposure only. It does not confer dividend rights, voting rights, or ownership of the companies represented in the index.

Was Kalshi first to bring a US500 perpetual-style product to a regulated U.S. venue?

Kalshi’s product is a no-expiration stock-index perpetual on a CFTC-regulated exchange, but the broader U.S. category already includes a related product from Coinbase Derivatives. CFTC product records show Coinbase Derivatives certified a US500 Index Perp Style Futures product on July 30, 2026.

The distinction is expiration. Kalshi’s US500PERP filing describes a contract with no expiration date. Coinbase’s US500 Index Perp Style Futures product appears in public product materials as a long-dated contract with a 2030 expiry. Both products point to the same broader shift: perpetual-style market structure is moving from offshore crypto venues into U.S. regulated derivatives infrastructure.

That shift also changes the competitive map. Equity-index exposure is one of the most important businesses in listed derivatives, and established exchanges already offer deep markets in S&P 500-linked futures and options. Kalshi’s regulated pitch is not just that it offers a new contract shape, but that it can offer perpetual-style exposure inside a CFTC-supervised exchange and clearing model.

How did US500PERP trade on launch day?

Early trading was small relative to the largest futures markets. Finance Magnates reported 24-hour volume of $556,000 and open interest of $219,600 at publication. Those figures describe an initial market, not a settled liquidity profile.

The comparison with crypto perpetuals is important, but not because the contracts necessarily attract the same users. Bitcoin perpetuals have an established retail and crypto-native audience. A stock-index perpetual may depend on a different mix of market makers, professional traders, and retail users seeking equity-index exposure.

Kalshi is also competing with offshore products that already give traders synthetic exposure to major U.S. equity benchmarks. Finance Magnates cited TradeXYZ, which references the S&P 500, along with Binance and Bybit products tied to SPYUSDT contracts. Kalshi’s differentiator is the regulated U.S. venue, not the mere existence of perpetual-style index exposure.

Why is CME suing the CFTC?

CME’s challenge is now part of the legal backdrop for every U.S. perpetual futures launch. Chicago Mercantile Exchange Inc. v. Selig, No. 1:26-cv-02157, was filed on June 18, 2026, in the U.S. District Court for the District of Columbia. The case challenges the CFTC’s May 29 approval of Kalshi’s BTCPERP product and a related agency policy statement.

The CFTC said on May 29 that it approved Kalshi’s BTCPERP contract after Kalshi submitted the product for Commission review on May 28. CME argues in its complaint that the agency changed its approach to perpetual futures without using the process required by the Commodity Exchange Act. The complaint also says the agency’s treatment of Kalshi’s bitcoin perpetual affects competition among regulated derivatives exchanges.

The Coinbase issue is related but distinct. CFTC staff action involving Coinbase Financial Markets addressed an interpretation and no-action position tied to foreign crypto asset perpetuals listed on Deribit FZE, not the same product-approval order challenged for Kalshi’s BTCPERP. That distinction matters because CME’s lawsuit is not a single blanket challenge to every perpetual-style contract in the market.

A core legal question is whether these instruments should be treated as futures contracts or as swaps subject to a different regulatory path. Kalshi’s filings emphasize features associated with listed futures: standardized terms, central clearing, margin requirements, and the ability to close exposure through offsetting trades. CME says the CFTC’s treatment of perpetual products requires closer legal scrutiny.

What other perpetual contracts has Kalshi brought to the CFTC?

US500PERP was not Kalshi’s only perpetual filing in 2026. CFTC product records show COPPERPERP and US500PERP approved on October 3, 2026. The copper product is tied to copper spot prices in dollars per pound and uses a Pyth Network price feed, according to earlier coverage by FinanceFeeds.

CFTC records also show GOLDPERP and SILVERPERP with September 3, 2026 approval dates, with later certified entries appearing for gold and silver as well. Together, the metals and equity-index contracts show Kalshi testing perpetual market structure beyond crypto and election-style event contracts.

The commercial framing is clear. Kalshi and other entrants argue that products developed offshore can be brought into a regulated U.S. framework. CME and other incumbents are testing how far the CFTC can go through product approvals, certifications, staff positions, and policy statements without a broader rulemaking process.

What happens next for US500PERP?

The immediate market test is whether the contract builds durable liquidity after its October 6 launch. Finance Magnates’ first-day figures, $556,000 in 24-hour volume and $219,600 in open interest, give the market a starting point. The more important comparison will be whether open interest and daily volume grow as traders evaluate regulated perpetual exposure to large-cap U.S. equities.

The legal test is already on a schedule. The docket in Chicago Mercantile Exchange Inc. v. Selig shows Judge Colleen Kollar-Kotelly set October 16, 2026, as the reply deadline on the CFTC’s motion to dismiss, November 20, 2026, for cross-motions, December 4, 2026, for amicus briefs, and December 14, 2026, for responses to cross-motions.

Those dates make the next two months central for the category. US500PERP is now trading, but the court’s briefing schedule will determine how quickly the legal fight over CFTC-approved perpetual futures moves from product launch into judicial review.