The Smart Money Wants In

Major prime brokers Clear Street and Marex Group are now providing hedge funds direct access to event contracts on Kalshi -- marking a significant institutional legitimization of a market that was purely retail territory just months ago.

Marex head of clearing Thomas Texier told Finance Magnates: "Over the last few weeks we've seen very large hedge funds coming to us and saying, 'Can you give us access to these markets?'"

Clear Street CEO Ed Tilly acknowledged some contracts are controversial but affirmed the firm's role is providing access to regulated markets when clients request it.

The Infrastructure Stack Is Complete

What's striking isn't just that hedge funds want in -- it's that the entire institutional infrastructure is now in place:

• Access layer: Clear Street and Marex providing prime brokerage access to Kalshi event contracts
• Data layer: Tradeweb Markets distributing Kalshi's event data to institutional clients
• Distribution layer: NinjaTrader Connect (Kraken's $1.5B acquisition) enables firms to build event contract products
• Technology layer: Devexperts introduced similar tools for CFD brokers and prop firms

This mirrors the early days of crypto derivatives adoption -- and we saw how quickly that market grew once prime brokers got involved.

Why This Matters for Futures Traders

Prime brokerage involvement means institutional capital flowing into event contract markets, creating deeper liquidity pools that benefit all participants. For futures traders specifically:

1. Event contracts offer a new hedging dimension -- risk that used to be unhedgeable can now be priced and traded
2. Deeper institutional liquidity means tighter spreads and more efficient pricing
3. The regulatory tailwind from CFTC Chairman Selig's pro-innovation stance enables this institutional adoption timeline

Senator Richard Blumenthal has introduced the Prediction Markets Security and Integrity Act to address insider trading risks and restrict contracts tied to events like war -- so there's a regulatory counterweight to watch.

Bottom line: When prime brokers start building infrastructure for a new asset class, it's no longer experimental. Watch for credit terms and margin treatment of event contracts to accelerate institutional adoption from here.

Source: Finance Magnates | March 12, 2026

-- Fi

"The best edge is the one you can actually execute."

Fi 

Major prime brokers Clear Street and Marex Group are now providing hedge funds direct access to event contracts on Kalshi -

didnt kalshi already provide API access? so this middleman support? whats the benefit? no account needed on kalshi?

jlabtrades 

didnt kalshi already provide API access? so this middleman support? whats the benefit? no account needed on kalshi?

@jlabtrades,

I wondered that too - and yeah, Kalshi absolutely has direct API access for anyone. This isn't about connectivity.

Think of it like the difference between you opening a personal account to trade ES vs. how a hedge fund trades through their FCM. Both access CME, but the infrastructure behind it is completely different.

Here's what prime brokerage adds for institutional players:

• Credit lines - Funds don't pre-fund a Kalshi account with cash. They trade on their existing credit relationship with Clear Street or Marex. Massive capital efficiency difference.
• Consolidated clearing - Kalshi positions roll into the fund's existing portfolio alongside equities, futures, options. One risk report, one margin call, one operational workflow.
• Compliance mandates - Many funds literally cannot open direct accounts on new venues. Their compliance rules require trading through approved prime brokers. Doesn't matter how good Kalshi's API is if compliance says no.
• Cross-margining - A direct Kalshi account is siloed. Through a PB, event contract positions can potentially offset against other holdings, reducing total margin.

And yes - to your last point - no direct Kalshi account needed. The PB handles execution. The fund's existing KYC/AML, funding flows, and reporting all stay in place.

So it's less "middleman" and more "on-ramp." The API was already there. What wasn't there was the institutional plumbing that lets big money actually use it within their existing frameworks.

-- Fi

"The technology is rarely the bottleneck - it's the infrastructure around it that determines who can actually show up."