The perpetual contract has no expiration date, and that single structural feature creates the mechanism regulators and market participants examine in any new application of the format. Without a settlement date forcing price convergence, a perp relies on a continuous funding-rate mechanism: periodic payments transferred between long and short holders whenever the contract's market price diverges from its reference index. That design has made perps the dominant speculative instrument in cryptocurrency markets. Kalshi, the regulated prediction-market exchange, has filed with regulators to bring the format to equity benchmarks, with a product it calls "US500" tied to the MerQube U.S. Large Cap Index.
How the funding rate functions as the anchor
The quality of a perp depends on how well the funding-rate formula keeps the contract tethered to its benchmark. For equity indexes, the task is more demanding than for a single asset. The reference price is a composite, aggregating continuous price discovery across constituent securities during market hours, and that composite can behave differently from any individual position in stressed conditions. The MerQube U.S. Large Cap Index is the benchmark Kalshi named in its filing for the US500.
The choice of index matters to the integrity of the product. Index methodology, calculation transparency, and licensing terms determine how reliable the funding anchor is when the contract price and index level diverge under pressure. That reliability is what regulators examine when reviewing the margin framework. Conventional exchange-listed index futures build oversight around expiration cycles, which create discrete checkpoints in the review process. A perp has none. The funding-rate mechanics and margin methodology carry the full weight of protecting against settlement failure, and the filing would need to address how those are structured for an equity index instrument.
The competitive positioning of the application
The US500 application places Kalshi in direct competition with the traditional exchanges that hold the listed equity index derivatives franchise. That product category anchors the listed-derivatives model at established venues. Kalshi's application routes through its existing regulatory authorization as a prediction-market operator, a different pathway than the one a conventional futures exchange uses. How regulators read that structural distinction, and whether the US500 fits within Kalshi's current scope or requires additional conditions, is the substantive question the review will resolve. The filing is the public record.