The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2021-01-01
-Paragraph 47
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_47_a_i&doctype=Standard
-URIDate 2021-03-24

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The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

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The exercise price of share options granted.

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The percentage of an expected dividend used to calculate the fair value of share options granted.

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The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]]

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Description Of Option Life Share Options

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Employee stock incentive plans (Details 5) - ₨ / shares	Jan. 17, 2022	Oct. 28, 2021	May 13, 2021	Oct. 27, 2020	May 19, 2020
Weighted average inputs used in the fair value of options granted [Line Items]
Expected volatility	28.60%	29.04%		30.81%
Exercise price	₨ 5	₨ 5		₨ 5
Option life	6 years 6 months	5 years		2 years 6 months
Risk-free interest rate	6.52%	5.99%		4.36%
Expected dividends	0.54%	0.54%		0.49%
Grant date share price	₨ 4,672	₨ 4,570		₨ 5,099
Option One on May 19, 2020 [Member]
Weighted average inputs used in the fair value of options granted [Line Items]
Expected volatility					29.12%
Exercise price					₨ 3,679
Option life					5 years
Risk-free interest rate					5.67%
Expected dividends					0.68%
Grant date share price					₨ 3,700
Option Two on May 19, 2020 [Member]
Weighted average inputs used in the fair value of options granted [Line Items]
Expected volatility					30.47%
Exercise price					₨ 5
Option life					2 years 6 months
Risk-free interest rate					4.62%
Expected dividends					0.68%
Grant date share price					₨ 3,700
Option One on October 28, 2021 [Member]
Weighted average inputs used in the fair value of options granted [Line Items]
Expected volatility		29.20%
Exercise price		₨ 4,663
Option life		5 years
Risk-free interest rate		5.94%
Expected dividends		0.55%
Grant date share price		₨ 4,570
Option Two on October 28, 2021 [Member]
Weighted average inputs used in the fair value of options granted [Line Items]
Expected volatility		28.53%
Exercise price		₨ 5
Option life		2 years 6 months
Risk-free interest rate		4.86%
Expected dividends		0.55%
Grant date share price		₨ 4,570
Option One on May 13, 2021 [Member]
Weighted average inputs used in the fair value of options granted [Line Items]
Expected volatility			29.38%
Exercise price			₨ 5,301
Option life			5 years
Risk-free interest rate			5.70%
Expected dividends			0.47%
Grant date share price			₨ 5,301
Option Two on May 13, 2021 [Member]
Weighted average inputs used in the fair value of options granted [Line Items]
Expected volatility			30.02%
Exercise price			₨ 5
Option life			2 years 6 months
Risk-free interest rate			4.64%
Expected dividends			0.47%
Grant date share price			₨ 5,301