Synthetic Short Put
Description
Holding the underlying and selling a call at the same strike, replicating the payoff of a short put using stock and a call instead of a put -- the same construction as a covered call.
Setup
- Hold (or buy) one unit of the underlying.
- Sell one call at the same strike as the put being replicated.
Context
The same position as a covered call, viewed through the lens of the put it replicates; used when the trader's frame of reference is the naked short put it stands in for.
Risk Profile
Maximum gain is the strike minus the entry price, plus the premium collected on the call. Loss grows as the underlying falls, bounded only by zero.
Pros
- Generates income like a covered call.
- Familiar stock-plus-option construction.
- No separate margin needed beyond holding the underlying.
Cons
- Retains the underlying's downside risk, less the premium.
- Caps participation in a strong rally.
Effect of Time
Time decay favors the position through the short call.
Effect of Volatility
Rising implied volatility increases the premium collected but also raises the odds of assignment.
Look-Alike Strategies
Live Structure
| Position | Right | Ratio | Strike | Expiry | Premium | Fill Price | Est. Fee |
|---|---|---|---|---|---|---|---|
| Long | Underlying | 1 | — | — | $84453.8800 | $84453.8800 | $0.0000 |
| Short | Call | 1 | $84500.0000 | 24 Sep 2026 | $228.0254 | $202.6892 | $25.3362 |
Estimated Cost to Assemble
An estimate of what entering this structure right now would really cost: filling every leg by crossing the spread (the ask when buying, the bid when selling) instead of at the mid-price, plus an estimated exchange fee. Real fees and fills can differ from this estimate.
Payoff & Greeks vs. Underlying Price
The Greeks curves are a Black-Scholes model using each leg's current implied volatility, holding time to expiry fixed -- not live exchange data at every price, which only exists at the current price (dashed line).
Payoff at Expiration
This structure's value and profit/loss at expiration, at a handful of specific prices: every leg's strike, every breakeven, the current spot, and the chart's own range.
| Underlying Price | Value at Expiration | Profit / Loss | Return on Cost |
|---|---|---|---|
| $67600.0000 | $67600.0000 | -$16625.8546 | -19.7% |
| $84225.8546 breakeven | $84225.8546 | $0.0000 | +0.0% |
| $84453.8800 current | $84453.8800 | $228.0254 | +0.3% |
| $101400.0000 | $84500.0000 | $274.1454 | +0.3% |