What it means
An option is a contract giving its buyer the right, but not the obligation, to buy (a call) or sell (a put) a stock at a fixed price (the strike) before a set date. When you sell an option you receive a payment, the premium, and you take on the obligation if the buyer exercises.
A straddle combines a call and a put at the same strike. In a covered straddle the investor already holds the shares, so the sold call is covered: if the buyer exercises, the investor simply delivers the shares they own.
The sold put, however, is a promise to buy another batch of shares at the strike price if the stock falls, which is why the strategy has substantial downside risk. Some investors also hold cash to cover the put purchase, which makes it a covered or cash-secured position.
The appeal is income. Because two premiums are collected, the total received can be significant, and if the share ends close to the strike both options expire worthless and the investor keeps all of it.
The strategy tends to work best in quiet, range-bound markets where the share price does not move much. The trade-off is that the potential profit is capped while the loss is not.
If the share price rises sharply, the call is exercised and the investor's shares are sold at the strike, giving up any further gains. If the share price falls sharply, the investor ends up owning twice as many shares at a price above the market, and the loss keeps growing as the stock drops toward zero.
Because of this risk, brokers usually require advanced options approval and margin or cash to back the position. For anyone who is not a trained investor, it is best treated as an example of how income and risk are linked, rather than as a strategy to copy.
In practice
Real-world examples.
Example
A retired engineer holds 100 shares in a stable utility company and expects little movement over the next month. She sells a covered straddle and collects $350, planning to keep the shares if the price stays near the strike.
Example
An investor sells a covered straddle on a technology stock the week before earnings. The share price jumps 15% and the call is exercised, so he sells at the strike and misses the extra gain.
Example
A portfolio manager sells a covered straddle on an industrial share but holds enough cash to buy the extra shares if the put is exercised. When the stock drifts down slightly, she buys the shares at the strike and treats the premium as a discount on her cost.
Formula
Calculation
Maximum profit = Total premium received
Downside break-even = Strike price - (Total premium received / Shares at risk)
An investor owns 100 shares of a stock trading at $50. They sell one $50 call for $2 per share and one $50 put for $2 per share, each covering 100 shares.
Total premium received = ($2 + $2) x 100 = $400, which is the maximum profit.
If the share price falls, the investor loses on the 100 shares they own and on the 100 shares they must buy under the put, so 200 shares are at risk.
Downside break-even = $50 - ($400 / 200) = $50 - $2 = $48.
At $40, for example, the loss is 200 x ($50 - $40) = $2,000, less the $400 premium, which is a net loss of $1,600.Case study
Seen in the real world.
Maple Ridge Capital is an illustrative, fictional family investment company that held 2,000 shares of a slow-growing retailer. The treasurer wanted extra income and sold covered straddles with a strike at the current price of $40 for a combined premium of $3 a share.
For three months the shares stayed between $38 and $42 and the options expired worthless, bringing in $6,000 each quarter. The treasurer began to regard the strategy as free money.
In the fourth quarter, an illustrative profit warning sent the stock down to $30. The company had to buy another 2,000 shares at $40, and the combined loss far exceeded the premiums collected. The lesson in this fictional story is that income from selling options is compensation for taking on risk, not a reward for doing nothing.
Watch out
Common mistakes.
- Assuming that "covered" means the position is safe, when the sold put creates major downside risk.
- Forgetting that owning shares plus a short put means you are exposed to twice as many shares if the price falls.
- Using the strategy on volatile stocks around events such as earnings, where large moves are likely.
Questions
People also ask.
What does covered mean in this strategy?
Only the call is covered by the shares you own; the put is backed by cash or margin and can still lose a lot of money.
When does the strategy make the most money?
When the share price finishes close to the strike, so both options expire worthless and you keep every premium.
Is it suitable for beginners?
Generally not, because it involves selling options with large potential losses and requires advanced approval from a broker.
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