Module 8: Crypto Options
How Crypto Options Markets Work
Chapter 10 of 14 · about 6 minutes
10.1 "Billions expire on Friday"
Mint saw a headline: "Billions of dollars in Bitcoin options expire this Friday. Expect volatility!"
"Should I be worried?" Mint asked.
"Sometimes large expiries matter, and often they don't," said Hash. "To judge that, you need to know how crypto options markets are structured: where they trade, how they settle, and what the data actually shows."
10.2 Where crypto options trade
| Venue type | Who uses it | Characteristics |
|---|---|---|
| Specialised crypto options exchanges | Crypto-native traders, funds, market makers | Most crypto options volume; many strikes and expiries; often coin-margined or stablecoin-margined |
| Regulated derivatives exchanges in traditional finance | Institutions | Options on regulated Bitcoin and Ether futures |
| Options on spot crypto ETFs | Traditional brokerage users | Listed options on spot Bitcoin ETFs began trading in the US in late 2024 |
| On-chain options protocols | DeFi users | Self-custody; often smaller liquidity |
| OTC desks | Large institutions and funds | Custom trades, privately negotiated |
Crypto options volume is concentrated in a small number of venues, mostly for BTC and ETH. Options on smaller tokens exist but are usually far less liquid.
10.3 Contract mechanics
Expiries. Major crypto options venues list daily, weekly, monthly, and quarterly expiries. Monthly and quarterly expiries, typically on the last Friday of the period, usually have the most open interest.
Settlement time. Many crypto venues settle options at a fixed time, often 08:00 UTC, using a settlement price based on an index averaged over a short window before expiry, which reduces manipulation risk (Module 7, Chapter 6).
Cash settlement. As Chapter 1 explained, most crypto options are cash-settled and European-style.
Quote currency. Options may be priced and settled in the underlying coin (coin-margined) or in a stablecoin. Coin-margined options have the extra complication that both the option's value and the collateral move with the coin's price (Chapter 5, and Module 7, Chapter 3).
Contract size. Often 1 BTC or 1 ETH, sometimes with smaller minimums.
10.4 Margin for buyers and sellers
Option buyers pay the full premium up front. There's no margin call or liquidation for a long option position, because the maximum loss is already paid.
Option sellers must post margin, because their potential losses can exceed the premium received. Margin requirements rise as positions move against them. Sellers can face margin calls and liquidation, just like perp traders (Module 7, Chapter 8).
| Buyer | Seller | |
|---|---|---|
| Pays or posts | Premium only | Margin, which can increase |
| Liquidation risk | None | Yes |
| Portfolio margin available? | Not needed | Often, for advanced users, offsetting risks across positions |
10.5 Liquidity and spreads
Options markets are spread across many strikes and expiries, so liquidity is thinner than in spot or perps.
| Option | Typical liquidity |
|---|---|
| Near-the-money, near-term BTC and ETH | Most liquid; tighter bid-ask spreads |
| Far out-of-the-money or long-dated | Less liquid; wider spreads |
| Smaller tokens | Often illiquid; very wide spreads |
Bid-ask spreads matter. If an option's bid is $2,600 and its ask is $2,900, buying at the ask and immediately selling at the bid loses $300, over 10%. Always check the spread before trading, and consider using limit orders inside the spread (Module 1, Chapter 11).
Large trades are often done as block trades, negotiated privately and then reported to the exchange, to avoid moving the order book.
10.6 Options data
Options markets publish data that's widely watched.
| Data | What it shows |
|---|---|
| Open interest by strike | Where the largest positions sit |
| Put/call ratio | Open interest or volume in puts compared with calls |
| Notional open interest by expiry | How much exposure expires on each date |
| Implied volatility, skew, and term structure | Market expectations and sentiment (Chapters 6 and 9) |
| Large block trades | What big players are doing |
The put/call ratio is sometimes used as a sentiment gauge: a high ratio suggests more demand for protection or bearish bets. But remember that every option has a buyer and a seller. A lot of put open interest could reflect hedging by holders, not bearish speculation.
10.7 Max pain
Max pain is the strike price at which the total value of all outstanding options, calls and puts, would be lowest at expiry. In other words, where option buyers collectively would lose the most.
Some traders believe prices tend to drift toward max pain before expiry, because option sellers, often market makers, benefit from it, and their hedging can nudge prices that way. The evidence for this is mixed. Max pain may matter more for smaller assets and near-term expiries with large open interest, and much less when bigger market forces dominate.
"So it's a theory, not a rule," said Node.
"A popular theory," said Hash. "Treat it as context, not a prediction."
10.8 Large expiries
Back to Mint's headline. Whether a large expiry matters depends on several factors.
| Factor | Effect |
|---|---|
| Where open interest is concentrated relative to the current price | Large positions near the money can create hedging flows |
| Market makers' estimated gamma position | Short gamma can amplify moves; long gamma can dampen them (Chapter 7) |
| Whether positions are rolled to the next expiry | Rolling can reduce any expiry effect |
| Overall market conditions | Big news can overwhelm expiry dynamics |
Headlines about "billions expiring" usually quote notional value: the value of the underlying covered, not the actual money at stake. Most of those options will expire worthless or are hedged, so the market impact is often much smaller than the headline suggests.
10.9 Access and regulation
Crypto options aren't available to retail traders everywhere. Some countries restrict them entirely, others allow them only through regulated venues or for professional investors (Module 1, Chapter 14). Options on spot ETFs offer an alternative route in some markets. Check local rules before using any venue.
10.10 Try it yourself
Find the open interest by strike for the next monthly BTC options expiry on a data site. Identify the strikes with the largest call and put open interest. Find the put/call ratio and the max pain level. On expiry day, note where BTC actually settled, and compare it with your notes.
Then check the bid-ask spread on an at-the-money option and a far out-of-the-money option for the same expiry, as a percentage of the option's price.
Key takeaways from this chapter
- Crypto options trade on specialised crypto exchanges, regulated futures exchanges, ETF options markets, on-chain protocols, and OTC desks.
- Most crypto options are European-style and cash-settled, with fixed settlement times based on index averages.
- Buyers pay the premium and can't be liquidated; sellers post margin and can be.
- Liquidity is concentrated near the money and in near-term BTC and ETH options; check bid-ask spreads.
- Open interest by strike, put/call ratios, and block trades provide market information, with caveats.
- Max pain is a popular theory with mixed evidence. Treat it as context.
- Large expiry headlines quote notional value; actual impact is often much smaller.