Deep Dive · Lesson 10
Covered Calls
and Protective Puts
Big Idea
Options can be used by themselves, but they can also be combined with shares you already own. Two important beginner-friendly strategies are covered calls and protective puts.
- Covered call = own shares + sell a call — often used to generate income
- Protective put = own shares + buy a put — often used to reduce downside risk
One strategy collects premium. The other spends premium.
Why These Strategies Matter
Covered calls and protective puts help beginners see how options can be used for more than speculation. Options are not only for betting on big price moves — they can also be used to manage stock positions. A stock investor may use options to:
- Generate extra income
- Reduce downside risk
- Set a possible selling price
- Protect against a sharp decline
- Create a more defined risk and reward plan
These strategies are still not risk-free. But they are easier to understand than many complex option combinations because they begin with something familiar: owning shares.
Strategy 1
Covered Calls
What Is a Covered Call?
A covered call is a strategy where an investor owns shares of a stock and sells a call option on those shares. The call is "covered" because the investor already owns the shares that may need to be delivered if the option is exercised.
- You own 100 shares of Acme
- You sell 1 call option on Acme
- Since one standard contract usually represents 100 shares, your call is covered by the shares you already own
Example Setup
- Acme at $50, you own 100 shares
- You sell a call, strike $55, receive $200 premium ($2/share)
- The option expires in one month
You received $200 today. In exchange, you may be required to sell your 100 shares at $55 per share if the option buyer exercises the call.
What the Covered Call Seller Wants
Outcome 1: The Stock Stays Below the Strike Price
If Acme stays below $55 through expiration, the call may expire worthless. You keep your shares, and you also keep the $200 premium. This is often the ideal outcome for someone who wants income and still wants to keep the stock.
Outcome 2: The Stock Rises Above the Strike Price
If Acme rises above $55, the call may be exercised and you may be assigned — meaning you may have to sell your 100 shares at $55 per share. This is not necessarily bad: you still sell above the original $50 stock price, and you keep the premium.
But there is a tradeoff. If Acme rises to $70, you still may have to sell at $55. The covered call limits your upside — you exchanged some future upside potential for premium today.
Covered Call Profit Example
- You own 100 shares of Acme, bought at $50
- You sold a call with a $55 strike price
- You received $200 premium
- The contract represents 100 shares
If Acme Is Below $55 at Expiration
The call expires worthless. You keep the shares and keep the $200 premium. Your stock may still be worth more or less than when you bought it, but the option part of the strategy produced $200 of income before fees.
If Acme Is at $55 or Higher at Expiration
You may be required to sell your shares at $55.
- Stock gain: $55 − $50 = $5 per share
- For 100 shares: $5 × 100 = $500
- Plus premium received: $200
- Total gain before fees: $500 + $200 = $700
Your upside is capped above $55 because you agreed to sell at that strike price.
Total Position at Expiration
| Stock at Expiration | Outcome | Total P&L |
|---|---|---|
| $40 | Keep shares, keep premium | −$800 |
| $50 | Keep shares, keep premium | Gain $200 |
| $55 | Shares may be called away | Gain $700 |
| $60 | Sell at $55, keep premium | Gain $700 (capped) |
| $70 | Sell at $55, miss the rest | Gain $700 (capped) |
Above $55 the gain stops growing — the premium was the price of that cap.
Covered Call Risk
A covered call is less risky than selling a naked call because you already own the shares. However, it is not risk-free.
Risk 1: The Stock Falls
If Acme falls from $50 to $35, you still own the shares. The $200 premium helps reduce the loss, but it does not eliminate the risk of owning the stock. A covered call only provides a limited downside cushion — not full protection from a major decline.
Risk 2: You Miss Out on Big Gains
If Acme rises sharply, your shares may be called away at the strike price. If Acme rises to $70 and your strike is $55, you may still have to sell at $55. You keep the premium, but you miss the gain above $55. That is the cost of the strategy.
Risk 3: Assignment Can Happen
If the call is exercised, you may be assigned and required to sell your shares. This is not a surprise if you understand the contract, but it can be frustrating if you wanted to keep the shares long term. A covered call should usually be sold at a strike price where you are comfortable selling.
Strategy 2
Protective Puts
What Is a Protective Put?
A protective put is a strategy where an investor owns shares of a stock and buys a put option on those shares. The put gives the investor the right to sell the shares at the strike price, which can help protect against a large decline.
- You own 100 shares of Acme
- You buy 1 put option on Acme
- The put acts somewhat like insurance — it does not stop the stock from falling, but it can limit how much value you lose below the strike price
Example Setup
- Acme at $50, you own 100 shares
- You buy a put, strike $45, pay $200 premium ($2/share)
- The option expires in one month
You paid $200 for the right to sell your 100 shares at $45 per share. If Acme falls sharply, the put can become valuable.
What the Protective Put Buyer Wants
The protective put buyer usually wants to continue owning the shares but wants protection if the stock falls. The ideal outcome is often:
- The stock rises
- The investor keeps the shares
- The put is not needed
- The investor accepts the premium as the cost of protection
But if the stock falls sharply, the put can help reduce the damage.
Protective Put Profit and Loss Example
- You own 100 shares of Acme, bought at $50
- You buy a put with a $45 strike price
- You pay $200 premium
- The contract represents 100 shares
If Acme Rises to $60
- Stock gain: $60 − $50 = $10 per share
- For 100 shares: $10 × 100 = $1,000
- Less put premium paid: $200
- Net result before fees: $1,000 − $200 = $800
The put may expire worthless, but it provided protection during the holding period.
If Acme Falls to $35
Without the put, your stock loss would be $15 × 100 = $1,500. But the put gives you the right to sell at $45, so your loss is capped near the strike:
- Stock loss down to the strike: $50 − $45 = $5 per share → $500
- Plus put premium paid: $200
- Total loss before fees: $500 + $200 = $700
The put did not prevent a loss — but it reduced the damage from $1,500 to $700.
Total Position at Expiration
| Stock at Expiration | Outcome | Total P&L |
|---|---|---|
| $30 | Sell at $45, loss capped | −$700 |
| $35 | Sell at $45, loss capped | −$700 |
| $45 | Put expires worthless | −$700 |
| $50 | Put expires worthless | −$200 |
| $60 | Keep upside, minus premium | Gain $800 |
Below the $45 strike the loss stops growing — that is the protection the premium bought.
Protective Put Risk
A protective put reduces downside risk, but it has costs and tradeoffs.
Risk 1: The Premium Can Be Lost
If the stock does not fall, the put may expire worthless and the premium is the cost of protection. Just like insurance, you may pay for it and not use it. That does not mean it was useless — it means the bad event did not happen during the protection period.
Risk 2: Protection Is Temporary
The put only lasts until expiration. Once the option expires, the protection is gone. If you still want protection, you may need to buy another put — and that can become expensive over time.
Risk 3: Protection Depends on the Strike Price
A $45-strike put protects differently from a $40-strike put. A higher strike gives more protection but usually costs more; a lower strike costs less but allows more downside before protection begins. The strike price is the insurance deductible of the strategy.
Covered Calls vs. Protective Puts
Both strategies start with owning shares, but they do different jobs.
| Strategy | Position | Main Purpose | Main Tradeoff |
|---|---|---|---|
| Covered call | Own shares + sell call | Generate income | Limits upside |
| Protective put | Own shares + buy put | Reduce downside risk | Costs premium |
A covered call is often used when the investor is willing to sell the stock at a certain price. A protective put is often used when the investor wants to keep the stock but limit the damage from a decline.
Simple Comparison Example
Imagine you own Acme at $50.
Covered Call
You sell a call with a $55 strike and receive $200. You get income now — but if Acme rises above $55, your upside may be limited.
Protective Put
You buy a put with a $45 strike and pay $200. You pay for protection now — but if Acme falls sharply, your downside is reduced.
One strategy collects premium and gives up some upside. The other spends premium and protects some downside.
When Might Someone Use Each?
A Covered Call
- They already own the stock
- They are willing to sell at the strike price
- They want to generate income
- They think the stock may stay flat or rise only slightly
- They understand that upside is limited
Not ideal if you strongly believe the stock is about to rise sharply and want to keep all upside.
A Protective Put
- They already own the stock
- They want to keep the stock
- They are concerned about a possible decline
- They want a defined exit price
- They are willing to pay premium for protection
May be useful around uncertain events — but if puts are expensive, the cost can significantly reduce returns.
Interactive Checks
Check 1 of 4
You own 100 shares of Acme at $50. You sell a call option with a strike price of $55 and receive $200 premium.
What may happen if Acme rises above $55 and the call is exercised?
Check 2 of 4
You sell a covered call and the stock falls sharply.
Does the covered call fully protect you from the stock decline?
Check 3 of 4
You own 100 shares of Acme at $50. You buy a put option with a strike price of $45 and pay $200 premium.
What right does the put give you?
Check 4 of 4
You buy a protective put. The stock rises and the put expires worthless.
Was the premium refunded?
Common Beginner Mistakes
- ❌ Thinking covered calls are risk-free income. You still own the stock. If it falls sharply, the premium may only reduce part of the loss.
- ❌ Selling covered calls on shares you do not want to sell. A covered call can result in your shares being sold at the strike price. If you are not willing to sell at that price, the strategy may not match your goal.
- ❌ Thinking protective puts prevent all losses. A put limits losses below the strike, but you can still lose between the purchase price and the strike — and you also pay the premium.
- ❌ Ignoring the cost of protection. Buying puts repeatedly can be expensive, and the cost reduces your return if the stock rises or stays flat.
Quick Memory Tool
Covered call = own stock + sell call
- You receive premium
- You may have to sell your shares
- Your upside is limited
- You still have downside stock risk
Protective put = own stock + buy put
- You pay premium
- You get the right to sell your shares
- Your downside is reduced
- Your upside stays open, minus the cost of the put
The Most Important Takeaway
Covered calls and protective puts show how options can be used with stock ownership. A covered call can generate income, but it limits upside and does not fully protect against losses. A protective put can reduce downside risk, but it costs money and only lasts until expiration.
Both strategies are useful because they show that options are not just about guessing direction — they are tools for shaping risk and reward.
Put it into practice
Model the income and capped upside with the Covered Call Calculator
Next Lesson
Cash-secured puts and covered calls as income strategies — how investors use option selling to generate premium income, and why that income should never be viewed as free money.