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Stock-Based Compensation (Tables)

9 Months Ended

Oct. 01, 2017

Schedule of Estimated Fair Value of TSR Performance-Based Restricted Stock Unit Awards 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
		October 1, 2017				October 2, 2016
Expected life (years)			5.0				5.0
Risk-free interest rate			2.0	%			1.4	%
Volatility-historical			27.8	%			32.9	%
Dividend yield			1.0	%			1.2	%

Stock Options

Fair Value of Stock Options Using Assumptions

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

		For the Nine Months Ended
		October 1, 2017				October 2, 2016
Risk-free interest rate			1.5	%			1.0	%
Teradyne volatility-historical			26.6	%			27.0	%
NYSE Composite Index volatility-historical			13.4	%			13.1	%
Dividend yield			1.0	%			1.2	%

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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