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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 27, 2020

Schedule of Estimated Fair Value of TSR Performance-Based Restricted Stock Unit Awards Assumptions

The fair value was estimated using the Monte Carlo simulation model with the following assumptions:

		For the Nine Months Ended
		September 27,				September 29,
		2020				2019
Risk-free interest rate			1.5	%			2.6	%
Teradyne volatility-historical			34.9	%			31.9	%
NYSE Composite Index volatility-historical			11.4	%			11.9	%
Dividend yield			0.6	%			1.0	%

Fair Value of Stock Options Using Assumptions

The fair value of stock options was estimated using the Black-Scholes option-pricing model with the following assumptions:

		For the Nine Months Ended
		September 27,				September 29,
		2020				2019
Expected life (years)			5.0				5.0
Risk-free interest rate			1.6	%			2.5	%
Volatility-historical			31.6	%			30.1	%
Dividend yield			0.6	%			1.0	%

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- Definition

Schedule Of Share Based Payment Award Total Shareholder Return Plan Valuation Assumptions [Table Text Block]

+ References

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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