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Home/Options strategies/Scenario Lab · Synthetic Long Stock

Bullish strategy · Scenario Lab

Test a Synthetic Long Stock across possible paths

Market outlook Bullish

Long call and short put at same strike mimic long stock. Use the lab to see how the position responds before committing to a single forecast.

Scenario Lab

See how the position changes

Move the underlying, clock, and implied volatility independently. Values before expiration use a Black–Scholes estimate; expiration values use intrinsic payoff.

Buy call 1
Sell put 2

The catalog’s default strikes and premiums are illustrative. No ticker lookup or market data is used.

Position valuation

Profit / loss at valuation date

Adjust the assumptions above to see the modelled P/L shape move. Green is profit; red is loss.

Estimated payoff by underlying priceSpot —
LossUnderlying price →Profit
Selected scenario—
Estimated P/L before expiration by underlying move and time remaining
UnderlyingToday30 days14 days7 daysExpiration
-15% ——————
-10% ——————
-5% ——————
0% ——————
+5% ——————
+10% ——————
+20% ——————
IV lens

At expiration

Intrinsic payoff checkpoints

Time value has gone to zero. IV no longer changes the result.

Profit or loss at expiration
UnderlyingMoveP/L
—-15%—
—-10%—
—-5%—
—0%—
—+5%—
—+10%—
—+20%—

Model boundary: theoretical estimates use dividend-adjusted Black–Scholes for European exercise or a 100-step binomial estimate for American exercise. Fees, spreads, discrete dividend dates, early assignment behavior, and liquidity effects are excluded. Calculation, not advice.

Why this structure behaves this way

Synthetic Long Stock is shaped by positive delta and long vega exposure

Delta tracks the stock near 1:1, mimicking share ownership. The long call and short put's theta and vega largely offset near the money, leaving small residual decay and a slight positive vega skew from the higher-IV short put.

This page uses the catalog’s illustrative default legs so you can compare direction, time, and volatility effects in one place. Edit the assumptions above to test a different starting point.