Choosing the right strike price is one of the most important decisions when selling Ethereum covered calls.
A strike that is too close to the current market price may generate attractive premium income but significantly increase the probability of assignment. A strike that is too far away may preserve upside but generate very little premium.
There is no perfect strike price.
The best strike depends on your market outlook, portfolio objectives, risk tolerance, and whether your primary goal is income generation or maximizing long-term Ethereum exposure.
At Terramatris, our primary objective is usually to maintain long-term ownership of Ethereum while generating recurring option premium. As a result, we often prefer strikes with a relatively low probability of assignment.
If you are new to covered calls, start with How to Generate Income With Ethereum Covered Calls.
Start With Your Objective
Before choosing a strike price, ask yourself a simple question: Why are you selling the covered call?
Different investors may have different goals:
- Generate maximum income
- Reduce portfolio volatility
- Lower acquisition cost
- Sell Ethereum at a target price
- Maintain long-term ETH ownership
The answer will largely determine which strike price makes sense.
At Terramatris, covered calls are primarily used as an income strategy rather than an exit strategy. We generally prefer keeping our Ethereum while collecting premium over time.
Why We Prefer Higher Strike Prices
Many investors are tempted by high premiums. Unfortunately, the highest premiums are usually attached to strikes closest to the current market price.
While those strikes may generate more income today, they also increase the likelihood that Ethereum will be called away.
For long-term investors, assignment can be frustrating. You lose exposure to Ethereum, may create taxable events, and often need to re-enter the market at higher prices if ETH continues to rally.
Because of this, we generally prefer selling strikes further out-of-the-money. The premium may be smaller, but the probability of keeping the underlying Ethereum position is much higher.
Using Delta as a Strike Selection Tool
One of the simplest ways to choose strike prices is by using option delta.
Delta is commonly used as a rough estimate of the probability that an option will finish in-the-money at expiration.
For covered calls:
- 0.50 delta = approximately 50% probability
- 0.30 delta = approximately 30% probability
- 0.15 delta = approximately 15% probability
- 0.10 delta = approximately 10% probability
While delta is not a perfect prediction tool, it provides a useful framework.
At Terramatris, we often focus on covered calls with approximately 0.15 delta.
This generally provides:
- Meaningful premium income
- Lower assignment probability
- More upside participation
- Greater flexibility for adjustments
In other words, we are usually willing to accept slightly lower premium income in exchange for maintaining long-term Ethereum exposure.
Why 0.15 Delta Works Well for Long-Term Investors
A 0.15 delta strike typically means there is roughly an 85% probability the option expires worthless. This aligns well with our philosophy.
We are not trying to maximize premium on every trade. Instead, we are trying to:
- Generate recurring income
- Retain Ethereum ownership
- Reduce assignment frequency
- Improve long-term portfolio returns
A lower assignment rate allows the strategy to compound more naturally over time.
Repeatedly losing and re-acquiring ETH often creates unnecessary friction and can make long-term portfolio management more difficult.
Weekly Covered Calls vs Monthly Covered Calls
Strike selection changes depending on expiration. A 0.15 delta weekly option may be much closer to the current ETH price than a 0.15 delta monthly option.
This is because time plays a major role in option pricing. Generally:
Weekly Covered Calls
Advantages:
- Faster premium collection
- More adjustment opportunities
- More frequent strike selection
Disadvantages:
- More trading activity
- Higher transaction costs
- More management required
Monthly Covered Calls
Advantages:
- Less active management
- Larger premium collection per trade
- Fewer decisions
Disadvantages:
- Less flexibility
- Longer exposure to market changes
- Fewer adjustment opportunities
At Terramatris, we often prefer shorter expirations because they provide more flexibility when market conditions change.
Leave Room for Adjustments
One often overlooked aspect of strike selection is adjustment flexibility. When selling covered calls, markets do not always cooperate.
Ethereum can rally unexpectedly. Volatility can expand. News events can change sentiment rapidly.
Selling strikes with lower delta provides more room to adjust positions if needed.
For example:
- Roll up
- Roll forward
- Roll up and forward
- Close early
Aggressive strikes leave fewer adjustment choices. Conservative strikes often provide more flexibility.
This is one reason we generally avoid selling at-the-money covered calls on long-term Ethereum holdings.
When Selling At-The-Money Calls Makes Sense
Although we usually prefer out-of-the-money strikes, there are situations where more aggressive covered call selling can be reasonable. Examples include:
- Buy-write strategies
- Short-term income generation
- Neutral market outlook
- Willingness to sell ETH
An at-the-money covered call often produces the highest premium. However, it also creates the highest assignment probability.
For investors who actively want to sell Ethereum at current levels, this can be a perfectly valid strategy. It simply serves a different purpose than our long-term income-focused approach.
Market Conditions Matter
Strike selection should never occur in isolation. Volatility plays a major role.
During periods of elevated implied volatility:
- Premiums increase
- Further out-of-the-money strikes become more attractive
- Assignment risk can often be reduced without sacrificing much income
During periods of low volatility:
- Premiums decrease
- Investors may be tempted to move strikes closer to the market price
Resist the temptation to chase premium. Higher income is rarely free.
The market is usually compensating you for accepting additional risk.
Common Strike Selection Mistakes
Many new covered call sellers make similar mistakes.
Chasing Premium
Premium should never be the only consideration. Higher premiums usually imply higher risk.
Selling Too Close to the Market
Aggressive strikes often lead to frequent assignment and lost upside.
Ignoring Volatility
The same strike may be attractive in one volatility environment and unattractive in another.
Having No Assignment Plan
Before selling any covered call, you should know exactly what you will do if assignment occurs.
A Practical Framework
For long-term Ethereum investors, a simple process might look like this:
- Decide whether you want to keep your ETH.
- Select an expiration.
- Review available deltas.
- Consider strikes around 0.10 to 0.20 delta.
- Evaluate premium relative to assignment risk.
- Enter the trade only if the risk-reward profile makes sense.
This approach will not maximize premium.
However, it often aligns better with long-term portfolio growth and capital preservation.
Conclusion
Strike selection is ultimately a balance between income and ownership. Investors seeking maximum premium will generally choose lower strikes and accept higher assignment risk.
Investors seeking long-term Ethereum exposure will often prefer higher strikes that generate less premium but allow them to keep their ETH more consistently.
At Terramatris, we generally favor strikes around 0.15 delta because they provide a reasonable balance between premium income, assignment probability, and adjustment flexibility.
The goal is not to maximize income on a single trade. The goal is to generate sustainable option income while maintaining long-term exposure to Ethereum.
Continue Learning
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- How to Generate Income With Ethereum Covered Calls
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