Covered Short Straddle
Owning shares + selling an ATM straddle (call + put at the same strike). It generates a double credit but with significant downside risk beyond that of a covered call.
Profit / Loss Diagram
Covered Short Straddle at expiration
What is this strategy?
The Covered Short Straddle combines a Covered Call with a Cash-Secured Put: you own 100 shares, sell 1 ATM call and sell 1 ATM put at the same strike. You receive a <em>double credit</em>, which increases income but with amplified downside risk.
The upside payoff is capped at the strike (the call cap), but on the downside the loss accelerates: if the underlying falls, you lose on the shares AND you are assigned on the put — forced to buy 100 more shares at the strike, doubling both position and loss.
An aggressive strategy for bullish traders willing to double their position at lower prices. NOT recommended if you lack the appetite or the capital for a doubled position.
Construction
| Action | Instrument | Strike | Expiration | Example |
|---|---|---|---|---|
| OWN | 100 Shares | N/A | N/A | +100 SPY @ $450 |
| SELL | 1 Call | ATM | 30-45 DTE | -1 SPY May 450 Call |
| SELL | 1 Put | ATM (same strike) | Same expiry | -1 SPY May 450 Put |
Example
You own 100 SPY at $450. You sell the ATM 450 straddle.
- Shares Owned +100 SPY @ $450 = $45,000
- Call Sold (450) +$500 premium received
- Put Sold (450) +$500 premium received
- Total Credit +$1,000
- Maximum Gain $1,000 (the whole credit) with SPY at $450 or above
- Breakeven $445.00 — the $10 per share of credit is spread across the 200 shares you would hold after assignment, not 100
- Loss if SPY = $400 −$9,000: $5,000 on the shares plus $5,000 on the put assignment, less $1,000 of credit
- Maximum Loss −$89,000 if SPY falls to zero — double exposure across 200 shares
The Greeks
Net delta sits between +1 and +2 depending on price: it starts at the long stock position and approaches +2 as the sold put moves into the money.
You sell two options at once, so daily decay in your favour is twice that of a plain covered call.
Two sold options give doubly negative vega: a compression of implied volatility benefits the position.
Doubly negative gamma. It is the real risk of the structure: a sharp fall accelerates the loss across 200 shares.
Position Management
- 01 Roll if Assignment Is Imminent If the put is in the money near expiration, consider rolling to the next month to avoid immediate assignment.
- 02 Reserve the Assignment Capital Before Opening If you are assigned on the put you end up with 200 shares. Check that you have the cash for that second purchase before selling the leg, not after.
- 03 Close if the Bullish Thesis Breaks The structure only makes sense on an underlying you would be willing to double. If it stops being one, close both sold legs and decide what to do with the shares.