The simple mental model
MCD example
Assume you already own 100 shares of McDonald's (MCD). The numbers below are purely illustrative and are not current option quotes.
| Position | Example | What you receive / reserve | Your obligation if assigned |
|---|---|---|---|
| Own stock | 100 MCD shares | Your existing investment | None from the stock itself |
| Sell to Open Call | $300 strike call | Example premium: $4.00/share = $400 | Sell 100 MCD shares at $300 if assigned |
| Sell to Open Put | $270 strike put | Example premium: $3.00/share = $300 | Buy 100 MCD shares at $270 if assigned |
You have now received $700 in option premium, while committing your existing 100 shares to the call side and reserving up to $27,000 of cash for the put side.
What happens at expiration?
| MCD price at expiration | $300 Call | $270 Put | Likely result |
|---|---|---|---|
| Above $300 | In the money | Expires worthless | Your 100 existing shares may be called away at $300. You keep both option premiums. |
| $270 to $300 | Expires worthless | Expires worthless | You keep your 100 MCD shares and keep both premiums. This is the income-producing zone. |
| Below $270 | Expires worthless | In the money | You may be assigned on the put and buy another 100 MCD shares at $270. You could then own 200 shares. |
| Far below $270 | Worthless | Deep in the money | You can suffer substantial losses because both your original shares and your newly acquired shares decline in value. |
Why investors use this strategy
The “income zone”
In this example, the most straightforward outcome occurs when MCD finishes between $270 and $300 at expiration.
That is why the strategy is often attractive when you expect the stock to remain approximately range-bound and you are comfortable with both boundary outcomes: selling at the upper strike and buying more at the lower strike.
The strategy does not fully protect the stock
The premiums provide only a limited cushion. If MCD falls sharply, the $700 premium will offset only a small portion of the decline in the value of your stock positions.
| Objective | Strategy | Effect |
|---|---|---|
| Generate more income and willingly buy more shares lower | Sell Call + Sell Put | Higher premium income, but greater commitment to the stock |
| Generate some income and protect against a major decline | Sell Call + Buy Put | Covered call helps pay for downside insurance |
Alternative: the collar
If your main goal is protection rather than acquiring additional shares, a collar may be more appropriate.
| Leg | Example | Purpose |
|---|---|---|
| Own MCD | 100 shares | Core stock position |
| Sell Call | $300 call | Collect premium, but cap upside above $300 |
| Buy Put | $270 put | Create downside protection below approximately $270 |
Collar: Sell Call + Buy Put = less income, but meaningful downside protection.
Before placing the trade
- Be genuinely willing to sell your existing 100 shares at the call strike.
- Be genuinely willing to buy another 100 shares at the put strike.
- Keep enough cash or buying power available for possible put assignment.
- Remember that assignment can occur before expiration.
- The stock merely touching a strike does not automatically trigger assignment.
- Consider earnings, dividend dates, ex-dividend dates, taxes, and holding periods.
- Compare premium received with the amount of capital committed.
- Avoid selling the put simply because the premium looks attractive; the strike should represent a price where you actually want to own more shares.
Summary
| Position | Mental model | You collect | Your assignment obligation |
|---|---|---|---|
| Sell to Open Call | Rent on shares | Call premium | Sell shares at the strike |
| Sell to Open Put | Rent on cash | Put premium | Buy shares at the strike |
| Sell both | Income from shares + cash | Two premiums | Possibly sell above the call strike or buy more below the put strike |