A crypto covered call is a call option you sell while holding the asset as collateral. Buyers pay you a premium for the right to buy your coins at the strike by expiry. If the call finishes out of the money, you keep the coins and the premium. If it finishes in the money and is exercised, you sell (or settle) at the strike per the contract.
This is a trade-off: you cap upside above the strike in exchange for premium now. Forty years of listed covered-call data point the same way: in a study of the Cboe BXM index covering June 1986 to January 2012, the strategy delivered a similar annualized return to the S&P 500 with lower volatility, and lagged in sharply rising markets. The same economics apply onchain; the rails differ.
Key takeaways
- You must hold the asset. The premium is paid up front and is yours whatever happens.
- Above the strike the gain is not yours. Below it you carry the full price risk, cushioned only by the premium.
- Premium depends on implied volatility, time to expiry and how far the strike is from the current price. There is no fixed APY.
- The trade also works on tokenized stocks, in any size a counterparty will quote.
The trade in plain numbers
Suppose you hold 10 ETH with ETH at $3,000, and sell a one-month call struck at $3,300 — 10% above the current price.
- Collateral: 10 ETH locked against the call you sold.
- Premium: say 0.4 ETH, about 4% of the position (illustrative: roughly what a one-month call 10% above the current price is worth when implied volatility is near 70%, where the Volmex ether index stood on 6 October 2026; real premium comes from the market or an RFQ quote).
- If ETH stays below $3,300 through expiry: the call expires; you keep 10 ETH and the premium.
- If ETH is above $3,300 and the call is exercised: you deliver the ETH, or pay the buyer the difference in value, depending on how the option settles.
The premium is payment for selling upside above $3,300 and locking collateral for the month.
Per ETH, with the 0.04 ETH premium valued at $120 on the day of the trade:
| ETH at expiry | Holding only | Covered call | Difference |
|---|---|---|---|
| $2,400 | $2,400 | $2,520 | +$120 |
| $3,000 | $3,000 | $3,120 | +$120 |
| $3,300 | $3,300 | $3,420 | +$120 |
| $3,900 | $3,900 | $3,420 | −$480 |
The covered call is ahead as long as ETH is below $3,420 at expiry, the strike plus the premium. Above that, holding would have paid more.
Why holders write covered calls
| Motive | How the call helps |
|---|---|
| Idle holdings | Earn premium on coins you plan to hold anyway |
| Soft exit above a target | Willingness to sell at the strike |
| Getting paid for volatility | When the market expects big moves, premiums are richer and assignment is more likely |
What it does not do: protect you in a crash. A covered call still loses if the price falls; premium only cushions part of the move.
How much can you earn
Three inputs set the premium: implied volatility, time to expiry, and how far the strike sits above the current price. Higher volatility and a closer strike both pay more, and both make assignment more likely.
For a sense of scale, the Volmex 30-day implied volatility indices stood at about 56 for bitcoin and 71 for ether on 6 October 2026. By standard option-pricing arithmetic, a one-month call 10% above the current price is then worth roughly 3% of the position on bitcoin and 4% to 5% on ether. An option priced that way also implies roughly a one-in-four chance of finishing above the strike.
Annualized figures need care. Grayscale Research estimated in July 2026 that a bitcoin covered call could yield about 22% annualized if bitcoin moved sideways, assuming a $65,000 market price and 40% implied volatility. In the same example the position broke even near $58,500 and stopped beating plain bitcoin above roughly $72,500. The headline yield and the cap arrive together.
How to choose strike and expiry
| Choice | More premium | Less premium |
|---|---|---|
| Strike | Closer to the current price; assigned more often | Further from the current price; assigned less often |
| Expiry | Longer term in total, though less per day | Shorter term; faster decay and more frequent decisions |
A workable rule: pick the strike at which you would be content to sell, then check whether the premium is worth the month. If you would regret selling at that price, the strike is too close.
Covered calls vs staking vs lending
| Source of yield | Who pays you | What you give up or risk |
|---|---|---|
| Covered call | An option buyer, up front | Upside above the strike; collateral locked to expiry |
| Staking | The network, as rewards (not available on all networks) | Lockup or unbonding time; slashing and validator risk |
| Lending | Borrowers, at a variable rate | Borrower and protocol credit risk |
None of the three hedges a fall in the asset itself. The bitcoin-specific comparison is in How to earn yield on bitcoin, and the staking trade-off for SOL is in Solana covered calls.
Onchain vs centralized covered calls
The payoff is identical on both. A centralized exchange holds your coins in an account and prices the call on its order book. Onchain, the coins sit in escrow in a smart contract and the premium comes from an order book, a vault auction or an RFQ. The full comparison is in Onchain covered calls.
Vault products automate selling on a schedule — simple to use, less control over strike and buyer. Selling the call yourself (including by RFQ) lets you set terms and see competing premiums. Background: Onchain options explained.
Which assets you can write against
The payoff is the same whatever the asset: ETH, BTC, SOL, tokenized equities such as NVDA or TSLA, and other tokenized real-world assets. What changes between them:
- Volatility — sets the level of premium. A higher-volatility asset pays more premium at the same distance from the current price, and is assigned more often.
- Wrapped assets — some onchain markets use wrapped bitcoin, a token that stands in for BTC on another chain. That adds the risk of whoever issues the wrapper.
- Depth of the market — the largest coins attract more quotes than small ones.
- Trading calendar — crypto trades continuously; a tokenized equity tracks an exchange session, so gaps happen between closes.
Because pricing comes from a quote rather than a listed book, the set of assets you can sell calls on depends on who will quote them, not on which contracts a platform has listed. Tokenized equities have their own guide: covered calls and puts on tokenized stocks.
Exercise style
Most crypto covered calls you will meet are European-style: exercise near expiry, not any day. That makes the outcome easier to plan.
Covered calls on Overcast
On Overcast, you request quotes for a covered call; trading desks compete on premium; settlement is onchain. Product overview: How Overcast works. Step by step: How to sell a covered call on Overcast.
Risks
- Opportunity cost — the price runs through the strike; you miss further upside.
- Collateral lock — your coins are committed for the life of the option.
- Software or platform risk — a fault in an onchain protocol, or the failure of an exchange holding your coins.
- Price-feed risk — if the way the option settles depends on an outside price.
FAQ
What does the trade look like on a coin you hold?
You hold the coin, sell a call at a strike above (or near) the current price, collect premium, and accept that you may sell at the strike if exercised.
Is there a typical yield on ETH, BTC or SOL?
Premium depends on strike, expiry, and implied volatility — and on who quotes you. There is no fixed APY. Treat any advertised vault yield as a strategy outcome, not a guarantee.
Can I do this without an exchange holding the coins?
Yes, through vaults, automated market makers (AMMs) or RFQ protocols. Compare who holds your coins, how the premium is set, and how the option settles. See How Overcast works for the RFQ path.
What happens if the price goes above the strike?
If the call is exercised you sell at the strike, or settle the difference, and keep the premium. Your result is capped at the strike plus the premium; anything above that belongs to the buyer.
Sources
- The CBOE S&P 500 BuyWrite Index (BXM): A Review of Performance, Hewitt EnnisKnupp for Cboe, 2012
- Volmex implied volatility indices, Volmex, viewed 6 October 2026
- Earning Bitcoin Option Income in the Range, Grayscale Research, 15 July 2026
Next reading
- Cash-secured puts — the matching trade for stablecoin holders
- Onchain covered calls
- Solana covered calls
- Earn yield on bitcoin
- Tokenized stock options
- How to sell a covered call on Overcast
- Crypto options explained
- How Overcast works
- For developers: settlement methods in the docs
Risk disclosure and disclaimer
The content on this blog is published by Overcast for general information and education only. It does not constitute financial, investment, legal, tax or accounting advice, and it is not an offer, solicitation or recommendation to buy, sell or hold any asset or to use any product or strategy. It does not take into account your objectives, financial situation or needs. Consult a qualified professional before making any investment decision.
Writing options involves substantial risk. A covered call limits your upside and leaves you fully exposed to declines in the underlying asset. A cash-secured put can oblige you to buy an asset at a price above its market value at expiry. Premiums, yields and APRs shown are illustrative or historical, are not guaranteed and do not predict future results. Crypto assets and tokenized securities are highly volatile and may lose some or all of their value. Smart contracts may contain vulnerabilities, and onchain transactions are irreversible.
Products, assets and features mentioned may not be available in your jurisdiction. You are responsible for complying with the laws that apply to you. Information may be incomplete, contain errors or become outdated; Overcast makes no warranty as to its accuracy or completeness.
Overcast is in early access. Features, supported assets and availability described here may change before or after launch.
Read more
Solana Covered Calls: Strikes, Yields and Risks
Solana covered calls explained: how SOL's higher volatility than bitcoin changes premium, strike choice and assignment risk, and what staking you give up.
How to Earn Yield on Bitcoin: Lending, BTCfi and Covered Calls
Ways to earn yield on bitcoin — lending, BTCfi collateral use, and covered calls — with the trade-off each one actually buys.
On-Chain Covered Calls: How They Work
How onchain covered calls work: your asset in escrow, a premium set by a vault, a pool, an order book or competing quotes, and what happens at expiry.