You own 100 shares of Harbor Coffee, our fictional coffee company. You want extra cash while keeping every share if the stock rallies to $80.
Selling a call brings in $400. It also commits you to selling those shares for $65 each if assigned. A separate put sale brings in $300, with a possible $6,500 purchase attached.
Both tickets bring cash in. The useful question is what they can make you give up.
Premium pays for an obligation
The seller's obligation is already familiar: deliver shares on a call or buy them on a put. These two strategies set aside what assignment would require.
A covered call combines owned shares with a call sold against the same number of shares. Buying the shares and selling the call together is a buy-write.
A cash-secured put combines a written put with cash reserved to buy the shares if assigned. The call writer exchanges upside for cash; the put writer gets paid to accept a possible purchase.
Use Harbor at $66 with our teaching quotes: a 60-day $65 call at $4 per share and a separate put with the same strike and expiration at $3. Each trade uses one standard US stock-option contract for 100 shares.
The shares are fully paid; expiration results exclude dividends, interest, fees, taxes and early exercise.
| Trade | Held aside | If assigned |
|---|---|---|
| Covered call | 100 shares | Sell for $6,500 |
| Cash-secured put | $6,500 cash | Buy 100 at $65 |
Option premium income is cash received for accepting the obligation. You can collect every dollar and still have a negative total return.
A covered call caps your upside
At a $66 entry price, 100 shares cost $6,600. Selling the call brings in 100 × $4 = $400. If assigned, you deliver all 100 shares for 100 × $65 = $6,500.
Your maximum profit is $6,500 + $400 − $6,600 = $300. You reach it at any expiration share price of $65 or higher. Even a flat stock price of $66 leaves you with $300, not the full $400 premium.
The call starts in the money: its buyer can pay $65 for a $66 share. If assigned, selling $1 below your entry price loses $100 across 100 shares. A quarter of the premium goes to covering that loss.
Suppose Harbor finishes at $80. Stock alone gains 100 × ($80 − $66) = $1,400. The covered call still gains only $300. If keeping every share through that rally is essential, this trade does not fit.
Below $65 at expiration, the call expires worthless and you keep the shares. At $40, those shares have lost $2,600. The $400 premium leaves you down $2,200.
At $62, the $400 cushion exactly offsets the stock loss, so you break even. At zero, your maximum loss is $6,600 − $400 = $6,200.
Covered means you have shares to deliver. Their value can still collapse.
A secured put can buy a falling stock
For the second trade, start with cash instead of shares. Reserve $6,500 and sell the $65 put for $3 per share. You receive $300; assignment still requires paying $6,500 for 100 shares.
Suppose Harbor finishes at $40. You pay $6,500 for shares worth $4,000. Including the premium, your result is $4,000 + $300 − $6,500 = −$2,200.
Cash secures your payment. It does nothing to secure the share price.
Your break-even is $65 − $3 = $62. At zero, your maximum loss is $6,500 − $300 = $6,200. That loss limit does not reduce the $6,500 payment due on assignment.
At or above $65, the maximum expiration profit is $300. If Harbor finishes at $80, the put expires worthless and you never acquire the shares. Getting paid to wait can mean watching the rally from the sidelines.
With these particular inputs, the two strategies have the same expiration profit line. It flattens at $300 while stock alone keeps climbing. Matching lines do not mean matching obligations.
Different quotes, dividends, cash interest and early assignment can change this comparison. Equal profits in this example do not mean equal cash requirements at a broker.
Test the trade before the income
Before treating the premium as income, work through three questions:
- What backs the contract? The shares or purchase cash must be available. Check the contract's share count and your broker's requirements; adjusted contracts can cover something other than 100 shares.
- What happens if the stock stays flat, crashes or rallies? Count the stock and option together. Include trading costs: the bid-ask spread and fees reduce what you keep.
- Can you accept assignment? A call can sell your shares. A put can spend your reserved cash. Either event must fit your plans before expiration, too.
Early assignment of an in-the-money call ahead of an ex-dividend date can take both the shares and the coming dividend out of your hands. A 60-day option does not give you 60 days to get ready.
Getting out also has a price. Closing a written option means buying it back at its market price. Suppose a call you sold for $400 now costs $700 to close: the option trade loses $300. The $400 coming in was only half the trade.
Rolling closes one option and opens another. The new premium comes with a new obligation; it cannot erase the old trade's loss. Both strategies need attention after the premium arrives.
Suppose a bill due next month would leave less than $6,500 available, even after the put premium. That cash cannot do both jobs. Keeping it ready for assignment means giving up the freedom to spend it elsewhere while the put stays open.
The call fails a plan that requires keeping every share. The put fails a plan that needs its backing cash for that bill. Annualizing either premium cannot make it dependable income.
You can go straight to the final funding check, or compare this with protective puts, an optional look at paying for a floor under the shares until expiration.
In short
- Premium pays you for an obligation; cash received is not the same as profit.
- A covered call caps upside and leaves substantial stock downside.
- A cash-secured put can make you buy shares far above their market price.
- Assignment can arrive before expiration, so backing shares or cash must stay available.