Retail Brokerages Add Access to Event-Contract Trading

Investors at participating firms can now trade event-based financial products directly within their existing accounts.

Updated on Oct. 20, 2026 in Investing

Isometric editorial illustration of stacked, interconnected rectangular prisms, representing digital data structures for financial market integration. — Kalshi is integrating its event-contract trading platform with retail brokerages through a new API from Apex Fintech Solutions. AI Illustration. Upload story photo >

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Kalshi is expanding access to its event-contract order book by allowing brokerage firms to integrate its trading platform through a new API provided by Apex Fintech Solutions. This integration enables retail investors at participating brokerages to access event-based financial products directly through their existing accounts.

Why it matters

By connecting brokerage platforms to a shared order book, Kalshi aims to increase liquidity for event-based contracts that track economic or corporate outcomes. This expansion connects retail investors at firms managing $1 trillion in combined assets to a growing menu of financial instruments.

Brokerage firms connected to the Kalshi network manage $1 trillion in total assets. It remains unknown how many individual retail accounts will gain access to these new contract types through their brokers as the integration rolls out.

The players

Kalshi

An exchange offering event-based contracts that track economic, political, and corporate outcomes.

Apex Fintech Solutions

A provider of financial infrastructure and API integration services for investment firms and brokerages.

tastytrade

A brokerage firm providing online trading services for retail investors, including stocks and options.

The details

The integration uses an API from Apex Fintech Solutions to connect brokerage platforms to Kalshi's event-contract order book. Apex manages the back-end infrastructure, including account management, custody, and money movement, to ensure trades settle within the existing brokerage workflow. This system allows investors to trade products like the US500PERP equity index future, which tracks the MerQube US Large Cap Index of 500 U.S. companies, without needing separate platform accounts.

July 27: tastytrade began offering Kalshi contracts.
August 13: Apex Fintech Solutions announced the API integration.
October 3: The CFTC approved the US500PERP contract.
October 6: Kalshi introduced the US500PERP equity index future.

Money Landscape

The integration follows the CFTC's approval of the US500PERP contract, signaling a broadening of the derivatives market for individual investors. This move positions event-contracts as a more integrated component of standard retail brokerage offerings.

Investors at participating brokerages may soon see new event-contract options appear directly in their trading menus. Because these instruments function differently than traditional stocks or ETFs, consider discussing the risks of event-based derivatives with a financial professional.

The takeaway

The move to integrate event-contracts into established brokerage apps changes how retail investors can interact with non-traditional market indicators. Keep an eye on your broker's platform updates to see if new contract categories become available for your account type.