Test a Call Calendar Spread across possible paths

Market outlook Near the strike

Same-strike call calendar approximated at expiration. 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 1Strike Leg DTE Leg IV %Premium

Sell call 2Strike Leg DTE Leg IV %Premium

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

Selected scenario—

Estimated P/L before expiration by underlying move and time remaining
Underlying	Today	30 days	14 days	7 days	Expiration
-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
Underlying	Move	P/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

Call Calendar Spread is shaped by neutral delta and long vega exposure

Near delta-neutral at the shared strike. The short front-month leg decays faster than the long back-month leg, producing net positive theta; the back-month leg retains more vega, so the spread is net long IV even while collecting time decay.

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.