Calendar Put Spread Calculator — DIA

Data as of Oct 20, 2026

Stock at 524.36. Build a position of up to 8 option legs plus stock; the chart shows P/L today and at expiration.

DATA IS DELAYED — showing Oct 20, 2026. Subscribe to get the latest end-of-day data.

Solve For

Model

Rate %

Hist Vol0.1235

Indexed IV0.1513

Div Amt

Ex-Date

Frequency

Preset

Expiry	Cost	TPrice	Vol	Delta	Gamma	Theta	Vega	Rho
		2.2714		0.4644	-0.0627	0.3934	-0.1889	0.0202
		4.1390		-0.4638	0.0346	-0.2021	0.3448	-0.0678
Position totals ($):	205.00	186.76	-18.24	0.06	-2.81	19.13	15.59	-4.76

Stock leg

About the Calendar Put Spread

The calculator opens with a calendar put spread: the at-the-money put sold in the nearest expiration and the same-strike put bought in the next one.

The spread is a net debit position that profits from time decay: the near put loses value faster than the far one. It does best with the stock near the strike when the near put expires, and gains from a rise in implied volatility. Its value then depends on what the far put is still worth, which the chart models; the most it can lose is about the debit.

Change the symbol, strikes, expirations or quantities, or add legs: the calculator takes up to eight option contracts and one stock position. To find candidates, use the Calendar Put Spreads Screener: its chart icon opens this calculator with the selected position.

Other strategy calculators

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