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Two people buy the same bitcoin call this week. Same strike, same expiry, the same coin underneath. When the trade settles, one of them collects a fixed pile of dollars and is finished. The other collects bitcoin, and is now holding a fresh bet on where bitcoin goes next. Nothing on either order ticket flagged the difference. The only thing that changed between them was the currency the contract pays out in.
The strike tells you where the line sits. The settlement currency tells you what you are left holding once price crosses it. That second fact is the one Kraken's mid-July launch dragged into the open, because it now lists USD-settled crypto options next to a market that has priced everything in coin for years. The two contracts read as identical, right up until the money moves.
This walkthrough follows two of Kodex's teaching voices. Eunha works by question, taking an idea apart until its mechanism is showing. Lucia is the skeptic, the one who says out loud what you are already half-thinking. She has just moved an account over from Deribit, where every option she traded settled in coin, and she is about to place her first order somewhere that pays in dollars. She is sure it is the same trade.
Lucia lines the two contracts up on one screen. "Same call," she says. "Ninety-thousand strike, a month out. Why would I care which venue I click?"
Eunha leaves the price alone. She starts with what Lucia will be holding on the other side of expiry.
On the payout screen, close enough. On what you own afterward, no.
"A crypto option comes in two designs," Eunha says. "The difference is not the strike or the expiry. It is the currency every part of the contract is priced in. One design runs on coin. The other runs on dollars. Kraken just put the dollar version on the same menu as the coin version, so the choice is now yours to make on purpose, or by accident."
Kraken's contracts are cash-settled, European-style bitcoin and ether options that quote, margin, and pay entirely in dollars, with no crypto posted as collateral. Its derivatives lead, Alexia Theodorou, framed the launch as a design problem rather than a demand one. "The gap in crypto options isn't demand, it's design," she told CoinDesk.
What needed fixing was the shape of the payout, not the appetite for one.
Lucia is unconvinced. "Dollars, coin, fine. If the option is in the money, it is in the money. The profit is the profit."
"Then let us follow the profit," Eunha says.
Everything, and that is exactly the part the dollar version removes.
Eunha sketches the coin-margined contract, the design Deribit has run for years and still calls inverse. "You pay the premium in bitcoin. You post bitcoin as collateral. If the option wins, it pays you in bitcoin. Three separate places where the contract touches your balance, and every one of them is priced in the coin whose direction you are trying to trade."
If you have ever held a coin-margined perpetual next to a dollar-margined one, this is a fork you already know. Perpetual futures versus swaps turns on the same question of what a contract is funded and settled in. Options just carry that fork all the way into the payout.
"So I pay in bitcoin to make a bet about bitcoin," Lucia says, "and the thing I win is more bitcoin."
"Which sounds circular," Eunha says, "until you watch what it does to the dollar value of the win."
Take the call Lucia was about to buy. Ninety-thousand strike, and say bitcoin prints one-hundred-thousand at expiry. The option is ten-thousand dollars in the money. That much is true on either venue.
On the USD-settled contract, ten-thousand dollars is what lands in the account. A flat number. Whatever bitcoin does in the next hour, the payout was dollars and it stays dollars.
On the coin-margined contract, the same ten-thousand of value pays out as bitcoin, priced at that instant: one-tenth of a coin. This is where the two trades split. That tenth of a coin is not a settled result. It is a live position. If bitcoin slips back to ninety-thousand an hour later, the win is worth nine-thousand. Had it run on to one-hundred-twenty-thousand, that same tenth of a coin would be worth twelve-thousand instead. The option finished at expiry, but the coin it paid you in never stopped moving.
You won the option and kept a coin trade you never opened.
Lucia sees it. "So the coin-settled option pays me and re-exposes me in the same move."
"Every leg of it," Eunha says. "The premium you paid, the collateral you posted, the coin you won: each one is priced in bitcoin, so the dollar value of the whole trade breathes with the coin. Plot that payout in dollars and it does not travel in a straight line. It curves, because a bitcoin-denominated result is worth more dollars when bitcoin is high and fewer when it is low. The option bet is real. It is just riding on top of a long-coin position you were handed whether you asked for it or not."
The force underneath is the same one that lets options positioning bend spot itself, the feedback loop behind bitcoin negative gamma. Denomination is not a footnote on a derivative. It is part of the payoff.
It removes the second job. A USD-settled option does one thing: it pays the option bet, in dollars, and stops. No coin lands in the account, so nothing keeps moving once the trade is done. A dollar of gain is a dollar, at expiry and long after it.
That is the whole point of the design Kraken shipped, and the reason it built the account around dollars from the ground up. Margin is posted in cash. Portfolio margin is on by default, with spot, futures, and options sharing one wallet and collateral accepted in more than thirty currencies. Expiries run weekly, monthly, quarterly, and semi-annual. At launch the contracts are open only outside Europe, North America, and Australia, with Europe expected in the second half of 2026. Because the margin is cash, a swing in bitcoin does not quietly drain the collateral behind your option the way it can when the collateral is the same coin you are betting on. OKX runs a parallel version it markets as linear, stablecoin-margined options, where a ten-thousand-dollar gain is ten-thousand of the stablecoin, no conversion and no second variable.
"So the dollar version is the honest one," Lucia says.
"It is the simpler one," Eunha says. "Honest is a different question, and it has its own catch. Before that, put the two side by side."
| Contract design | Premium and collateral | Payout paid in | Dollar payoff | Long-coin exposure baked in | Suits the person who |
|---|---|---|---|---|---|
| Coin-margined (inverse) | Bitcoin | Bitcoin | Bends with spot; a won call is still a live coin position | Yes, on every leg | already holds coin and thinks in coin |
| USD-settled (linear) | Dollars, or a stablecoin | Dollars, or that stablecoin | Flat; a dollar stays a dollar | No; stripped out | thinks in dollars and wants the option bet by itself |
Read the last two columns before the strike price. They decide whether you are buying an option, or an option fastened to a coin position you now have to manage.
Neither, and Eunha refuses to rank them. "Safer is the wrong axis. Coin-margined is not more dangerous than the dollar version. It just hands you an exposure the dollar version does not, and danger only shows up when you are carrying an exposure you did not know was there. Pick the contract whose leftovers you actually want."
That is the trap hiding in Lucia's own move across venues. The strike on Deribit and the strike on Kraken can read the same to her, ninety-thousand on both screens, and still carry different dollar risk the moment either one settles. The number she recognized did not port over. Only the word did.
There is one more seam, the catch she flagged. USD-settled does not always mean the same currency. Kraken settles in dollars, actual fiat, so the payout has nothing sitting under it. Deribit and OKX settle their linear options in USDC. Same flat payoff shape, plus one more thing you are trusting: that the stablecoin holds its peg to the dollar. Deribit takes that seriously enough to publish a section on what happens to your settlement if USDC ever loses its peg. A payout in a stablecoin is still linear. It just answers to one more promise than a payout in the currency itself.
Lucia says it slowly. "So the real question is never which one is safer. It is which currency the contract settles in, and I should have been reading that before the strike."
"Now you are reading the contract, not the label," Eunha says.
It is one line on the contract spec, usually sitting right above the strike you were staring at. Settlement currency, or quote currency: coin, dollars, or a named stablecoin. That single field tells you which of the two trades you are placing. Reading a contract for what it settles in, rather than what its label promises, is the same habit as reading open interest for real positioning instead of taking the headline number at face value. Kodex keeps that kind of pre-trade read on Market Tools.
None of this makes coin-margined options a trap or USD-settled ones a free lunch. It makes them two different instruments wearing one name. The skill is not picking the safe one. It is knowing, before you press the button, which exposure you are choosing to carry. That is the whole of how Kodex teaches risk: the loss you can survive is the one you saw coming.
Some are, some are not, and that gap is the point. USD-settled (linear) options like Kraken's are cash-settled: they pay the dollar difference and close. Coin-margined (inverse) options settle in the underlying coin instead, so the payout arrives as bitcoin or ether, not cash. Same option, different settlement asset.
In USD, actual dollars, with no crypto collateral required. That is different from the linear options on Deribit and OKX, which settle in USDC. Both give you a flat, dollar-shaped payoff, but the stablecoin route adds a dependence on USDC holding its peg that a fiat payout does not carry.
Effectively yes, on top of the option. Because the premium, collateral, and payout are all priced in bitcoin, the dollar value of the trade rises and falls with the coin no matter what the option itself does. A USD-settled call isolates the option bet and leaves that coin exposure out.
You have the theory now. Go feel what the denominator does to a result. Open the simulator, put the same dollars into bitcoin and into a dollar-priced tokenized stock, then move the market and watch the two balances: the bitcoin side turns your whole outcome into a bet on the coin, the dollar-priced side does not. That gap is the embedded coin position a coin-margined option folds into the strike, and here it plays out on paper long before it is ever your capital.
