The fair value of options granted is estimated as of the grant date using the Black-Scholes-Merton option-valuation model using the assumptions in the following table. Woodward calculates the expected term, which represents the average period of time that stock options granted are expected to be outstanding, based upon historical experience of plan participants. Expected volatility is based on historical volatility using daily stock price observations. The estimated dividend yield is based upon Woodward’s historical dividend practice and the market value of its common stock. The risk-free rate is based on the U.S. treasury yield curve, for periods within the contractual life of the stock option, at the time of grant.

	Year Ended September 30,
	2020							2019						2018
Weighted-average exercise price per share	$	90.52						79.84						78.91
Weighted-average grant date market value of Woodward stock	$	90.52						79.84						78.91
Expected term (years)			6.4		-	8.7			6.5		-	8.7			6.4		-	8.7
Estimated volatility			25.7	%	-	35.1	%		25.7	%	-	31.0	%		29.1	%	-	32.7	%
Estimated dividend yield			0.4	%	-	0.9	%		0.6	%		0.8	%		0.6	%	-	0.8	%
Risk-free interest rate			0.4	%	-	1.7	%		1.5	%	-	3.1	%		2.1	%	-	2.8	%

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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