On May 29, Kalshi flipped the switch on BTCPERP, the first CFTC- regulated Bitcoin perpetual futures contract in U.S. history. A week later, the press cycle has moved on, the headline (”America’s first regulated Bitcoin perp!”) has been written sixty different ways, and nobody has gone back to look at what’s actually happening on the platform.
So I did.
The honest opening: Kalshi has not released volume numbers for BTCPERP, and no third-party tracker is publishing them yet either. If you came here looking for “they did X billion in week one, ” I can’t give you that. What I can give you is everything else — the product specs, who’s already using it, what just got added, and what the competitive timeline looks like. The picture that emerges is more interesting than a single volume number anyway.
The product, decoded
Most of the coverage so far has been “no expiration date, funding rate, finally onshore. ” All true. But the specific design choices tell you who Kalshi is really building this for.
Contract size: 1/10,000 of a Bitcoin. At a roughly $73,400 BTC spot price, that’s about $7.34 of notional exposure per contract. Tiny. This is a retail-friendly size — comparable to the micro Bitcoin futures the CME launched specifically for individual traders. Compare that to a standard CME Bitcoin future at 5 BTC ($367,000 notional) and you can see the targeting.
Reference price: CF Benchmarks Bitcoin Real-Time Index (BRTI). KPMG-audited, calculated continuously from observable transactions across major spot venues. This matters because it’s the same index Bitcoin ETF issuers use to calculate NAV. Kalshi picked a reference rate that institutional traders already trust, which is a small but real signal about who they expect to show up.
Funding rate: every 8 hours. Identical to Binance and Bybit. Identical to Hyperliquid. Anyone trading offshore perps will plug into Kalshi without retraining their mental model — that’s deliberate.
Custody: positions and collateral held in regulated FCM accounts. This is the whole reason institutions couldn’t touch offshore perps. Bitcoin sitting on Binance is in Binance’s pocket. Bitcoin (well, dollars) backing a Kalshi perp is at a regulated U.S. futures commission merchant. For a hedge fund’s compliance team, that’s the difference between “yes” and “we can’t get this approved. ”
Trades 24/7. Of course. But the CFTC explicitly noted in the approval order that perpetual contracts may be “well-suited for continuous trading given digital infrastructure and global reach” — regulator-speak that essentially blesses 24/7 derivatives in the U.S. for the first time. That’s bigger than BTCPERP itself.
What just shipped (that nobody’s writing
about)
The faster story is what’s happened since the May 29 approval.
Ethereum perpetuals are already live. On June 4 — six days after BTCPERP launched — Kalshi rolled out ETH perps under the same “American Perpetuals” branding, with zero trading fees for a limited promotional window. Analyst Ted Pillows posted a screenshot of a small ETH short he opened to test it. Kalshi’s pending filings cover six more altcoin perps: XRP, Solana, Dogecoin, Stellar, Shiba Inu, and Hedera. The CFTC has been clear that each contract is reviewed individually — approval of one doesn’t extend to others — but the six- day BTC-to-ETH turnaround suggests the process can move quickly when the underlying asset has deep, regulated reference pricing already available.
Institutional plumbing is already in place. Clear Street, a major institutional broker, partnered with Kalshi to become the first FCM providing regulated clearing access to prediction markets for hedge funds. Galaxy Digital launched an institutional OTC prediction markets trading desk specifically for Kalshi, with their first trade — a $10 million block — going to Arca. This is not retail infrastructure being retrofitted for institutions. The institutional rails were already there when BTCPERP launched.
The first big block trade has cleared. Last week, Kalshi executed a bespoke block trade brokered by Greenlight Commodities between a Houston-based environmental hedge fund and Jump Trading. (That specific trade was tied to California carbon allowance pricing, not BTCPERP — but the point is that the block-trade machinery is now operational at Kalshi for any product, perps included.)
The competitive countdown
This is the part nobody is paying enough attention to.
Kraken said it would list its own CFTC-regulated BTC perp within 30 days of Kalshi’s approval. That window closes around June 28. If Kraken delivers on that timeline, Kalshi’s “America’s first” claim has a roughly six-week period of exclusivity before the first real competitor hits the same product category.
Robinhood and Gemini have both signaled they want in. Robinhood is particularly interesting because Robinhood users already account for about 25% of Kalshi’s total trading volume — meaning a quarter of Kalshi’s customer base would have a more native option to trade perps if Robinhood ships its own. That’s a structural risk Kalshi has to be aware of.
The CFTC sent Coinbase a no-action letter the same day they approved Kalshi, allowing Coinbase to route U.S. customers into offshore perps through its Bermuda affiliate. This is Coinbase getting a side door to the same market without having to file a Reg 40.3 contract. Different regulatory pathway, similar end result for the customer.
So within a month, the U.S. regulated/quasi-regulated perp market goes from one venue (Kalshi) to potentially four (Kalshi, Kraken, Coinbase via Bermuda, possibly Robinhood). The first-mover window is real but narrow.
What isn’t working (yet)
The piece so far reads like a Kalshi advertisement. It shouldn’t. There are real cracks in the launch, and the most honest read of week one is that several of them are visible.
1. Kalshi hasn’t published a single BTCPERP volume number. This is the loudest tell. Every other Kalshi milestone has been accompanied by volume bragging: $100M in the first week of combos, $52B-to-$178B annualized for the whole platform, 800% institutional growth, $10 billion in February alone. When a company that publishes growth numbers obsessively goes quiet on a flagship product launch, the most likely explanation is that the number isn’t impressive enough to lead with. A week in, that silence speaks.
2. The order book is almost certainly thin. All day-one books are. Hyperliquid runs roughly $180 billion in monthly perp volume with $1 BTC spreads and 140 BTC of depth on the ask. Even Binance — meaningfully behind Hyperliquid on execution — clears about $5.50 spreads with 80 BTC of depth. Kalshi launching at 1/10,000 BTC contract size means they need enormous trade counts just to approach Binance-level depth. Without screenshots from inside the app, we can’t verify the current state, but the structural math says week-one BTCPERP traders are paying wider spreads than they would offshore.
3. ETH launched into a weak tape. Ethereum was trading near $1,769 on June 4, down more than 3% on the day, with aggregate ETH open interest falling 6% across the market. That’s not the backdrop you want when introducing a new derivative — most retail traders avoid initiating positions during sustained selloffs, and the zero-fee promo only matters if traders show up. The decision to launch into a weak tape rather than wait suggests Kalshi prioritized speed-to-market over launch-day optics. Defensible strategy, but worth flagging.
4. The Robinhood concentration is a single point of failure. Roughly 25% of Kalshi’s total volume comes from Robinhood users routing through to the platform. If Robinhood ships its own CFTC-regulated perp — and they’ve publicly said they want to — a meaningful chunk of Kalshi’s existing customer base has a more native option one tap away. That’s not theoretical risk; that’s a structural dependency Kalshi has not yet figured out how to defuse.
5. The altcoin pipeline isn’t a slam dunk. The CFTC was explicit that BTCPERP approval doesn’t extend to other assets — each contract gets independent review. XRP, Solana, Dogecoin, Stellar, Shiba Inu, and Hedera each have their own filing, their own timeline, and their own risk of rejection. Kalshi can’t simply assume the six pending filings clear at ETH’s six-day pace. ETH had unique advantages (deep regulated reference pricing, ETF precedent, KPMG-audited spot index). XRP has a recent SEC settlement and a complicated history. Dogecoin doesn’t have any institutional pricing infrastructure. Each filing has its own degree of difficulty.
None of this makes BTCPERP a failure. It makes it a launch — with the usual mix of “shipped fast, real demand” and “thin book, narrow margin for error” that defines every new derivatives product. The story of the next six weeks is whether the cracks widen or close.
The thing Kalshi can’t replicate
There’s a number worth sitting with. Hyperliquid currently clears approximately $180 billion in monthly perpetual futures volume. Their BTC perp typically shows about a $1 spread, with order book depth of 140 BTC on the ask side at peak. Binance, by comparison, shows a roughly $5.50 spread with about 80 BTC of depth at the same level.
Kalshi is launching into a market where the offshore incumbents are this efficient.
Even if every U.S. institution that’s been geofenced out of Hyperliquid and Binance shows up at Kalshi tomorrow, matching $180 billion in monthly volume is years of work, not weeks. The natural question — is Kalshi BTCPERP actually tighter than Binance? Looser than Hyperliquid? — is exactly what’s missing from the public data right now. My guess based on launch dynamics: the spread is wider and the depth is thinner, because that’s what happens on day-one books no matter how good the product is. But that’s a guess. If a Kalshi user reading this wants to send me a screenshot of their order book, I’ll publish the comparison.
What Kalshi has that Hyperliquid doesn’t: U.S. regulatory legitimacy. That’s the entire pitch. For a fund manager, the question isn’t “is the spread tighter on Hyperliquid?” The question is “can I get this past my compliance department?” Hyperliquid: no. Kalshi: yes. The volume that shows up at Kalshi is volume that literally could not have shown up anywhere else.
What to actually watch
A few things that will tell you whether BTCPERP is working, in order of how soon you’ll be able to see them:
1. ETH perp adoption rate. If ETH perps catch on within the first month at Kalshi, that’s a strong signal that the multi-asset perp story is real. If they don’t — if everyone trades BTC and ignores ETH — Kalshi has a product-market-fit problem to figure out before XRP/SOL/DOGE land.
2. Funding rate behavior. This is the cleanest tell. If Kalshi BTCPERP’s funding rate stays meaningfully out of line with Binance/Hyperliquid’s funding rate, arbitrageurs aren’t showing up — meaning the product is being used by retail directional traders rather than market makers. If the funding rate stays tight to offshore, market makers are present and the market is functioning. Kalshi makes funding rate history visible in transaction records. Anyone can check this.
3. Whether Galaxy’s institutional desk does a second block. The first $10M trade was a launch headline. Whether they’re back next month with another one is the actual signal about whether institutional demand is real or whether the first trade was a courtesy.
4. Kraken’s launch date. If they hit the 30-day target, the perp market gets crowded fast. If they slip, Kalshi gets a longer runway.
The bigger picture### text
Step way back and look at what Kalshi has shipped in six months: combos in December, 15-minute crypto markets in January, Bitcoin perpetuals on May 29, Ethereum perpetuals six days later on June 4, and (per the screenshots I covered yesterday) crypto-on-crypto parlay combos some time in the last few days. This isn’t a prediction-market company expanding into derivatives. It’s a derivatives exchange that built a prediction-market product first to get the CFTC’s attention, and is now executing on what they actually wanted to be the entire time. Bitcoin perpetuals are the centerpiece of that strategy. One week in, we don’t yet have the volume numbers to know if they’ve nailed it. But the things we can observe — ETH following BTC in under a week, institutional rails already plugged in, competitors burning rubber to catch up — all suggest the product is doing what it needs to do. The week two follow-up writes itself. I’ll come back with numbers when there are numbers to come back with.