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Financial Instruments
12 Months Ended
Dec. 31, 2020
Financial Instruments
H.    FINANCIAL INSTRUMENTS
Cash Equivalents
Teradyne considers all highly liquid investments with maturities of three months or less at the date of acquisition to be cash equivalents.
Marketable Securities
Teradyne recognizes the changes in fair value of equity securities directly in earnings. Teradyne’s available-for-sale debt securities are classified as Level 2, and equity and debt mutual funds are classified as Level 1.
 
Contingent consideration is classified as Level 3. The vast majority of Level 2 securities are fixed income
securities priced by third party pricing vendors. These pricing vendors utilize the most recent observable market information in pricing these securities or, if specific prices are not available, use other observable inputs like market transactions involving identical or comparable securities.
During the years ended December 31, 2020 and 2019, there were no transfers in or out of Level 1, Level 2, or Level 3 financial instruments.
Realized gains recorded in 2020, 2019, and 2018 were $4.6 million, $1.3 million, and $4.0 million, respectively. Realized losses recorded in 2020, 2019, and 2018 were $0.3 million, $0.2 million, and $1.6 million, respectively. Realized gains and losses are included in other (income) expense, net.
Unrealized gains on equity securities recorded during the years ended December 31, 2020 and 2019 were $9.6 million and $5.3 million, respectively. Unrealized losses on equity securities recorded during the years ended December 31, 2020 and 2019 were $6.0 million and $0.4 million, respectively. Unrealized gains and losses on equity securities are included in other (income) expense, net. Unrealized gains and losses on available-for-sale debt securities are included in accumulated other comprehensive income (loss) on the balance sheet.
The cost of securities sold is based on the first-in first out method.
The following table sets forth by fair value hierarchy Teradyne’s financial assets and liabilities that were measured at fair value on a recurring basis as of December 31, 2020 and 2019:
 
 
  
December 31, 2020
 
 
  
Quoted Prices

in Active

Markets for

Identical

Instruments

(Level 1)
 
  
Significant

Other

Observable

Inputs

(Level 2)
 
  
Significant

Unobservable

Inputs

(Level 3)
 
  
Total
 
 
  
(in thousands)
 
Assets
  
     
  
     
  
     
  
     
Cash
  
$
443,166
 
  
$
—  
 
  
$
—  
 
  
$
443,166
 
Cash equivalents
  
 
347,768
 
  
 
123,187
 
  
 
—  
 
  
 
470,955
 
Available for sale securities:
  
     
  
     
  
     
  
     
U.S. Treasury securities
  
 
—  
 
  
 
258,304
 
  
 
—  
 
  
 
258,304
 
Commercial paper
  
 
—  
 
  
 
254,413
 
  
 
—  
 
  
 
254,413
 
Corporate debt securities
  
 
—  
 
  
 
83,615
 
  
 
—  
 
  
 
83,615
 
Debt mutual funds
  
 
8,565
 
  
 
—  
 
  
 
—  
 
  
 
8,565
 
U.S. government agency securities
  
 
—  
 
  
 
4,339
 
  
 
—  
 
  
 
4,339
 
Certificates of deposit and time deposits
  
 
—  
 
  
 
979
 
  
 
—  
 
  
 
979
 
Non-U.S. government securities
  
 
—  
 
  
 
625
 
  
 
—  
 
  
 
625
 
Equity securities:
  
     
  
     
  
     
  
     
Mutual funds
  
 
29,420
 
  
 
—  
 
  
 
—  
 
  
 
29,420
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
828,919
 
  
$
725,462
 
  
$
—  
 
  
$
1,554,381
 
Derivative assets
  
 
—  
 
  
 
95
 
  
 
—  
 
  
 
95
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
828,919
 
  
$
725,557
 
  
$
—  
 
  
$
1,554,476
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Liabilities
  
     
  
     
  
     
  
     
Contingent consideration
  
$
—  
 
  
$
—  
 
  
$
7,227
 
  
$
7,227
 
Derivative liabilities
  
 
—  
 
  
 
504
 
  
 
—  
 
  
 
504
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
—  
 
  
$
504
 
  
$
7,227
 
  
$
7,731
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Reported as follows:
 
  
(Level 1)
 
  
(Level 2)
 
  
(Level 3)
 
  
Total
 
 
  
(in thousands)
 
Assets
  
     
  
     
  
     
  
     
Cash and cash equivalents
  
$
790,934
 
  
$
123,187
 
  
$
—  
 
  
$
914,121
 
Marketable securities
  
 
—  
 
  
 
522,280
 
  
 
—  
 
  
 
522,280
 
Long-term marketable securities
  
 
37,985
 
  
 
79,995
 
  
 
—  
 
  
 
117,980
 
Prepayments and other current assets
  
 
—  
 
  
 
95
 
  
 
—  
 
  
 
95
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
828,919
 
  
$
725,557
 
  
$
—  
 
  
$
1,554,476
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Liabilities
  
     
  
     
  
     
  
     
Other current liabilities
  
$
—  
 
  
$
504
 
  
$
—  
 
  
$
504
 
Long-term contingent consideration
  
 
—  
 
  
 
—  
 
  
 
7,227
 
  
 
7,227
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
—  
 
  
$
504
 
  
$
7,227
 
  
$
7,731
 
    
 
 
    
 
 
    
 
 
    
 
 
 
 
 
  
December 31, 2019
 
 
  
Quoted Prices

in Active

Markets for

Identical

Instruments

(Level 1)
 
  
Significant

Other

Observable

Inputs

(Level 2)
 
  
Significant

Unobservable

Inputs

(Level 3)
 
  
Total
 
 
  
(in thousands)
 
Assets
  
     
  
     
  
     
  
     
Cash
  
$
311,975
 
  
$
—  
 
  
$
—  
 
  
$
311,975
 
Cash equivalents
  
 
410,285
 
  
 
51,664
 
  
 
—  
 
  
 
461,949
 
Available for sale securities:
  
     
  
     
  
     
  
     
Corporate debt securities
  
 
—  
 
  
 
97,307
 
  
 
—  
 
  
 
97,307
 
Commercial paper
  
 
—  
 
  
 
54,149
 
  
 
—  
 
  
 
54,149
 
U.S. Treasury securities
  
 
—  
 
  
 
42,382
 
  
 
—  
 
  
 
42,382
 
U.S. government agency securities
  
 
—  
 
  
 
9,952
 
  
 
—  
 
  
 
9,952
 
Debt mutual funds
  
 
6,888
 
  
 
—  
 
  
 
—  
 
  
 
6,888
 
Certificates of deposit and time deposits
  
 
—  
 
  
 
4,751
 
  
 
—  
 
  
 
4,751
 
Non-U.S. government securities
  
 
—  
 
  
 
592
 
  
 
—  
 
  
 
592
 
Equity securities:
  
     
  
     
  
     
  
     
Mutual funds
  
 
25,772
 
  
 
—  
 
  
 
—  
 
  
 
25,772
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
754,920
 
  
$
260,797
 
  
$
—  
 
  
$
1,015,717
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Derivative assets
  
 
—  
 
  
 
528
 
  
 
—  
 
  
 
528
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
754,920
 
  
$
261,325
 
  
$
—  
 
  
$
1,016,245
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Liabilities
  
     
  
     
  
     
  
     
Contingent consideration
  
$
—  
 
  
$
—  
 
  
$
39,705
 
  
$
39,705
 
Derivative liabilities
  
 
—  
 
  
 
203
 
  
 
—  
 
  
 
203
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
—  
 
  
$
203
 
  
$
39,705
 
  
$
39,908
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Reported as follows:
 
  
(Level 1)
 
  
(Level 2)
 
  
(Level 3)
 
  
Total
 
 
  
(in thousands)
 
Assets
  
     
  
     
  
     
  
     
Cash and cash equivalents
  
$
722,260
 
  
$
51,664
 
  
$
—  
 
  
$
773,924
 
Marketable securities
  
 
—  
 
  
 
137,303
 
  
 
—  
 
  
 
137,303
 
Long-term marketable securities
  
 
32,660
 
  
 
71,830
 
  
 
—  
 
  
 
104,490
 
Prepayments and other current assets
  
 
—  
 
  
 
528
 
  
 
—  
 
  
 
528
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
754,920
 
  
$
261,325
 
  
$
—  
 
  
$
1,016,245
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Liabilities
  
     
  
     
  
     
  
     
Other current liabilities
  
$
—  
 
  
$
203
 
  
$
—  
 
  
$
203
 
Contingent consideration
  
 
—  
 
  
 
—  
 
  
 
9,106
 
  
 
9,106
 
Long-term contingent consideration
  
 
—  
 
  
 
—  
 
  
 
30,599
 
  
 
30,599
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
  
$
—  
 
  
$
203
 
  
$
39,705
 
  
$
39,908
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Changes in the fair value of Level 3 contingent consideration for the years ended December 31, 2020 and 2019 were as follows:
 
 
  
Contingent Consideration
 
 
  
(in thousands)
 
Balance at December 31, 2018
  
$
70,543
 
Acquisition of AutoGuide
  
 
23,976
 
Foreign currency impact
  
 
(967
Payments (1)
  
 
(34,590
Fair value adjustment (2)
  
 
(19,257
    
 
 
 
Balance at December 31, 2019
  
 
39,705
 
Foreign currency impact
  
 
(355
Payments (3)
  
 
(8,852
Fair value adjustment (4)
  
 
(23,271
    
 
 
 
Balance at December 31, 2020
  
$
7,227
 
    
 
 
 
 
(1)
During the year ended December 31, 2019, Teradyne paid $30.8 million and $3.8 million of contingent consideration for the earn-outs in connection with the acquisitions of MiR and Universal Robots A/S (“Universal Robots”), respectively.
(2)
During the year ended December 31, 2019, the fair value of contingent consideration for the earn-out in connection with the acquisition of MiR was decreased by $22.2 million primarily due to a decrease in forecasted revenues partially offset by the impact from modification of the earn-out structure. During the year ended December 31, 2019, the fair value of contingent consideration for the earn-out in connection with the acquisition of AutoGuide was increased by $3.0 million primarily due to an increase in forecasted revenues
(3)
During the year ended December 31, 2020, Teradyne paid $8.9 million of contingent consideration for the earn-out in connection with the acquisition of MiR.
(4)
During the year ended December 31, 2020, the fair value of contingent consideration for the earn-out in connection with the acquisition of AutoGuide was decreased by $19.7 million primarily due to a decrease in forecasted revenues
 
and earnings before interest and taxes
. Teradyne has received a letter from the sellers of AutoGuide alleging non-compliance with the earn-out provisions of the AutoGuide acquisition agreement. Teradyne disputes the allegation of non-compliance. The ultimate amount of contingent consideration for the earn-outs in connection with the acquisition of AutoGuide may be affected by the outcome of the dispute. During the year ended December 31, 2020, the fair value of contingent consideration for the earn-out in connection with the acquisition of MiR was decreased by $3.5 million primarily due to a decrease in forecasted revenues.
 
The following table provides quantitative information associated with the fair value measurement of Teradyne’s Level 3 financial instrument:
 
Liability
  
December 31,

2020

Fair Value
 
  
Valuation

Technique
  
Unobservable Inputs
  
Weighted

Average
 
 
  
(in thousands)
 
  
 
  
 
  
 
 
Contingent consideration
(AutoGuide)
  
$
7,227
 
  
Monte Carlo simulation
  
Revenue Volatility
  
 
16.5%
 
 
  
     
  
 
  
Discount Rate
  
 
1.0%
 
As of December 31, 2020, the significant unobservable inputs used in the Monte Carlo simulation to fair value the AutoGuide contingent consideration include forecasted revenues, revenue volatility, earnings before interest and taxes and discount rate. Increases or decreases in the inputs would result in a higher or lower fair value measurement. As of December 31, 2020, the maximum amount of contingent consideration that could be paid in connection with the acquisition of AutoGuide is $100.2 million.
No payment was made related to the period ending December 31, 2020. The remaining earn-out periods end on December 31, 2021 and December 31, 2022.
The carrying amounts and fair values of Teradyne’s financial instruments at December 31, 2020 and 2019 were as follows:
 
 
  
December 31, 2020
 
  
December 31, 2019
 
 
  
Carrying Value
 
  
Fair Value
 
  
Carrying Value
 
  
Fair Value
 
 
  
(in thousands)
 
Assets
  
     
  
     
  
     
  
     
Cash and cash equivalents
  
$
914,121
 
  
$
914,121
 
  
$
773,924
 
  
$
773,924
 
Marketable securities
  
 
640,260
 
  
 
640,260
 
  
 
241,793
 
  
 
241,793
 
Derivative assets
  
 
95
 
  
 
95
 
  
 
528
 
  
 
528
 
Liabilities
  
     
  
     
  
     
  
     
Contingent consideration
  
 
7,227
 
  
 
7,227
 
  
 
39,705
 
  
 
39,705
 
Derivative liabilities
  
 
504
 
  
 
504
 
  
 
203
 
  
 
203
 
Convertible debt (1)
  
 
410,111
 
  
 
1,739,553
 
  
 
394,687
 
  
 
1,010,275
 
 
(1)
The carrying value represents the bifurcated debt component only, while the fair value is based on quoted market prices for the convertible note which includes the equity conversion features.
The fair values of accounts receivable, net and accounts payable approximate the carrying amount due to the short term nature of these instruments.
The following tables summarize the composition of available-for-sale marketable securities at December 31, 2020 and 2019:
 
 
  
December 31, 2020
 
 
  
Available-for-Sale
 
  
 
 
 
  
Cost
 
  
Unrealized

Gain
 
  
Unrealized

(Loss)
 
 
Fair Market

Value
 
  
Fair Market

Value of Investments

with Unrealized Losses
 
 
  
(in thousands)
 
U.S. Treasury securities
  
$
257,132
 
  
$
1,330
 
  
$
(158
 
$
258,304
 
  
$
17,243
 
Commercial paper
  
 
254,404
 
  
 
10
 
  
 
(1
 
 
254,413
 
  
 
12,173
 
Corporate debt securities
  
 
76,129
 
  
 
7,539
 
  
 
(53
 
 
83,615
 
  
 
39,896
 
Debt mutual funds
  
 
8,413
 
  
 
152
 
  
 
—  
 
 
 
8,565
 
  
 
—  
 
U.S. government agency securities
  
 
4,294
 
  
 
46
 
  
 
(1
 
 
4,339
 
  
 
1,106
 
Certificates of deposit and time deposits
  
 
979
 
  
 
—  
 
  
 
—  
 
 
 
979
 
  
 
—  
 
Non-U.S. government securities
  
 
625
 
  
 
—  
 
  
 
—  
 
 
 
625
 
  
 
—  
 
    
 
 
    
 
 
    
 
 
   
 
 
    
 
 
 
 
  
$
601,976
 
  
$
9,077
 
  
$
(213
 
$
610,840
 
  
$
70,418
 
    
 
 
    
 
 
    
 
 
   
 
 
    
 
 
 
Reported as follows:
 
  
Cost
 
  
Unrealized

Gain
 
  
Unrealized

(Loss)
 
 
Fair
 
Market

Value
 
  
Fair Market

Value of Investments

with Unrealized Losses
 
 
  
(in thousands)
 
Marketable securities
  
$
522,228
 
  
$
92
 
  
$
(40
 
$
522,280
 
  
$
61,806
 
Long-term marketable securities
  
 
79,748
 
  
 
8,985
 
  
 
(173
 
 
88,560
 
  
 
8,612
 
    
 
 
    
 
 
    
 
 
   
 
 
    
 
 
 
 
  
$
601,976
 
  
$
9,077
 
  
$
(213
 
$
610,840
 
  
$
70,418
 
    
 
 
    
 
 
    
 
 
   
 
 
    
 
 
 
 
 
  
December 31, 2019
 
 
  
Available-for-Sale
 
  
 
 
 
  
Cost
 
  
Unrealized

Gain
 
  
Unrealized

(Loss)
 
 
Fair Market

Value
 
  
Fair Market

Value of Investments

with Unrealized Losses
 
 
  
(in thousands)
 
Corporate debt securities
  
$
93,267
 
  
$
4,081
 
  
$
(41
 
$
97,307
 
  
$
2,009
 
Commercial paper
  
 
54,124
 
  
 
26
 
  
 
(1
 
 
54,149
 
  
 
1,391
 
U.S. Treasury securities
  
 
42,167
 
  
 
431
 
  
 
(216
 
 
42,382
 
  
 
17,556
 
U.S. government agency securities
  
 
9,942
 
  
 
14
 
  
 
(4
 
 
9,952
 
  
 
3,043
 
Debt mutual funds
  
 
6,753
 
  
 
135
 
  
 
—  
 
 
 
6,888
 
  
 
—  
 
Certificates of deposit and time deposits
  
 
4,751
 
  
 
—  
 
  
 
—  
 
 
 
4,751
 
  
 
—  
 
Non-U.S. government securities
  
 
592
 
  
 
—  
 
  
 
—  
 
 
 
592
 
  
 
—  
 
    
 
 
    
 
 
    
 
 
   
 
 
    
 
 
 
 
  
$
211,596
 
  
$
4,687
 
  
$
(262
 
$
216,021
 
  
$
23,999
 
    
 
 
    
 
 
    
 
 
   
 
 
    
 
 
 
Reported as follows:
 
 
  
Cost
 
  
Unrealized

Gain
 
  
Unrealized

(Loss)
 
 
Fair
 
Market

Value
 
  
Fair Market

Value of Investments

with Unrealized Losses
 
 
  
(in thousands)
 
Marketable securities
  
$
137,144
 
  
$
160
 
  
$
(1
 
$
137,303
 
  
$
2,922
 
Long-term marketable securities
  
 
74,452
 
  
 
4,527
 
  
 
(261
 
 
78,718
 
  
 
21,077
 
    
 
 
    
 
 
    
 
 
   
 
 
    
 
 
 
 
  
$
211,596
 
  
$
4,687
 
  
$
(262
 
$
216,021
 
  
$
23,999
 
    
 
 
    
 
 
    
 
 
   
 
 
    
 
 
 
As of December 31, 2020, the fair market value of investments with unrealized losses less than one year totaled $70.4 million.
As of December 31, 2019, the fair market value of investments with unrealized losses less than one year totaled $23.6 million.
Teradyne reviews its investments to identify and evaluate investments that have an indication of possible impairment. Based on this review, Teradyne determined that the unrealized losses related to these investments at December 31, 2020 and 2019, were not other than temporary.
The contractual maturities of investments in available-for-sale marketable securities held at December 31, 2020 were as follows:
 
  
Cost
 
  
Fair Value
 
 
  
(in
 
thousands)
 
Due within one year
  
$
522,228
 
  
$
522,280
 
Due after 1 year through 5 years
  
 
24,829
 
  
 
25,245
 
Due after 5 years through 10 years
  
 
13,030
 
  
 
14,183
 
Due after 10 years
  
 
33,476
 
  
 
40,567
 
    
 
 
    
 
 
 
Total
  
$
593,563
 
  
$
602,275
 
Contractual maturities of investments in available-for-sale marketable securities held at December 31, 2020 exclude debt mutual funds with the fair market value of $8.6 million as they do not have a contractual maturity date.
Derivatives
Teradyne conducts business in a number of foreign countries, with certain transactions denominated in local currencies. The purpose of Teradyne’s foreign currency management is to minimize the effect of exchange rate fluctuations on certain foreign currency denominated monetary assets and liabilities. Teradyne does not use derivative financial instruments for trading or speculative purposes.
To minimize the effect of exchange rate fluctuations associated with the remeasurement of monetary assets and liabilities denominated in foreign currencies, Teradyne enters into foreign currency forward contracts. The change in fair value of these derivatives is recorded directly in earnings, and is used to offset the change in value of the monetary assets and liabilities denominated in foreign currencies.
At December 31, 2020 and 2019, Teradyne had the following contracts to buy and sell non-U.S. currencies for U.S. dollars and other non-U.S. currencies with the following notional amounts:
 
  
December 31, 2020
 
 
December 31, 2019
 
 
  
Buy

Position
 
 
Sell

Position
 
  
Net

Total
 
 
Buy

Position
 
 
Sell

Position
 
  
Net

Total
 
 
  
(in millions)
 
Japanese Yen
  
$
(14.1
 
$
—  
 
  
$
(14.1
 
$
(29.3
 
$
—  
 
  
$
(29.3
Taiwan Dollar
  
 
(27.9
 
 
—  
 
  
 
(27.9
 
 
(18.4
 
 
—  
 
  
 
(18.4
Korean Won
  
 
(5.3
 
 
—  
 
  
 
(5.3
 
 
(10.7
 
 
—  
 
  
 
(10.7
British Pound Sterling
  
 
(1.0
 
 
—  
 
  
 
(1.0
 
 
(3.8
 
 
—  
 
  
 
(3.8
Singapore Dollar
  
 
—  
 
 
 
52.3
 
  
 
52.3
 
 
 
—  
 
 
 
25.3
 
  
 
25.3
 
Euro
  
 
—  
 
 
 
43.9
 
  
 
43.9
 
 
 
—  
 
 
 
47.8
 
  
 
47.8
 
Philippine Peso
  
 
—  
 
 
 
5.0
 
  
 
5.0
 
 
 
—  
 
 
 
5.2
 
  
 
5.2
 
Chinese Yuan
  
 
—  
 
 
 
3.4
 
  
 
3.4
 
 
 
—  
 
 
 
4.4
 
  
 
4.4
 
Total
  
$
(48.3
 
$
104.6
 
  
$
56.3
 
 
$
(62.2
 
$
82.7
 
  
$
20.5
 
    
 
 
   
 
 
    
 
 
   
 
 
   
 
 
    
 
 
 
The fair value of the outstanding contracts was a loss of $0.4 million and a gain of $0.3 million, respectively, at December 31, 2020 and 2019.
Gains and losses on foreign currency forward contracts and foreign currency remeasurement gains and losses on monetary assets and liabilities are included in other (income) expense, net.
The following table summarizes the fair value of derivative instruments as of December 31, 2020 and 2019:
 
 
  
Balance Sheet Location
  
December 31,

2020
 
 
December 31,

2019
 
 
  
 
  
(in thousands)
 
Derivatives not designated as hedging instruments:
  
 
  
     
 
     
Foreign exchange contracts
  
Prepayments
  
$
95
 
 
$
528
 
Foreign exchange contracts
  
Other current liabilities
  
 
(504
 
 
(203
Total derivatives
  
 
  
$
(409
 
$
325
 
The following table summarizes the effect of derivative instruments in the statements of operations recognized for the years ended December 31, 2020, 2019, and 2018.
 
 
 
Location of (Gains) Losses
Recognized in Statement
of Operations
 
December 31,

2020
 
 
December 31,

2019
 
 
December 31,

2018
 
 
 
 
 
(in thousands)
 
Derivatives not designated as hedging instruments:
 
 
 
     
 
     
 
     
Foreign exchange contracts
  
Other (income) expense, net
  
$
3,515
 
  
$
5,960
 
  
$
7,386
 
 
(1)
The table does not reflect the corresponding gains and losses from the remeasurement of the monetary assets and liabilities denominated in foreign currencies.
(2)
For the years ended December 31, 2020, net losses from remeasurement of monetary assets and liabilities denominated in foreign currencies were $2.6
million.
(3)
For the year ended December 31, 2019 and 2018, net gains from the remeasurement of monetary assets and liabilities denominated in foreign currencies were $1.6 million and $2.5 million, respectively.
See Note J: “Debt” regarding derivatives related to the convertible senior notes.
Concentration of Credit Risk
Financial instruments which potentially subject Teradyne to concentrations of credit risk consist principally of cash equivalents, marketable securities, forward currency contracts and accounts receivable. Teradyne’s cash equivalents consist primarily of money market funds invested in U.S. Treasuries and government agencies. Teradyne’s fixed income available-for-sale marketable securities have a minimum rating of AA by one or more of the major credit rating agencies. Teradyne places foreign currency forward contracts with high credit-quality financial institutions in order to minimize credit risk exposure. Concentrations of credit risk with respect to accounts receivable are limited due to the large number of geographically dispersed customers. Teradyne performs ongoing credit evaluations of its customers’ financial condition and from time to time may require customers to provide a letter of credit from a bank to secure accounts receivable. As of December 31, 2020, a customer of our Semiconductor Test segment, JA Mitsui Leasing, LTD, accounted for 25% of our accounts receivable balance. The balance was paid in full as of February 22, 2021. There were no customers who accounted for 10% or more of our accounts receivable balance as of December 31, 2019.