Quarterly report pursuant to Section 13 or 15(d)

MARKETABLE SECURITIES

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MARKETABLE SECURITIES
3 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
MARKETABLE SECURITIES MARKETABLE SECURITIES
The amortized cost and fair value of marketable securities as of the dates indicated below were as follows:
As of September 30, 2020 (In thousands) Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Corporate debt securities $ 402,338  $ 2,046  $ (88) $ 404,296 
Money market funds and other 682,785  —  —  682,785 
Municipal securities 35,368  261  —  35,629 
U.S. Government agency securities 137,169  326  (8) 137,487 
U.S. Treasury securities 177,076  1,101  —  178,177 
Subtotal 1,434,736  3,734  (96) 1,438,374 
Add: Time deposits(1)
133,836  —  —  133,836 
Less: Cash equivalents 744,577  —  —  744,577 
Marketable securities $ 823,995  $ 3,734  $ (96) $ 827,633 
As of June 30, 2020 (In thousands) Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Corporate debt securities $ 379,334  $ 2,673  $ (50) $ 381,957 
Money market funds and other 694,950  —  —  694,950 
Municipal securities 28,859  251  —  29,110 
Sovereign securities 2,009  —  2,017 
U.S. Government agency securities 106,091  252  (7) 106,336 
U.S. Treasury securities 179,631  1,564  (2) 181,193 
Subtotal 1,390,874  4,748  (59) 1,395,563 
Add: Time deposits(1)
124,153  —  —  124,153 
Less: Cash equivalents 773,653  —  —  773,653 
Marketable securities $ 741,374  $ 4,748  $ (59) $ 746,063 
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(1) Time deposits excluded from fair value measurements.
Our investment portfolio consists of both corporate and government securities that have a maximum maturity of three years. The longer the duration of these securities, the more susceptible they are to changes in market interest rates and bond yields. As yields increase, those securities with a lower yield-at-cost show a mark-to-market unrealized loss. Most of our unrealized losses are due to changes in market interest rates and bond yields. We believe that we have the ability to realize the full value of all of these investments upon maturity. As of September 30, 2020, we had 40 investments in an unrealized loss position. The following table summarizes the fair value and gross unrealized losses of our investments that were in an unrealized loss position as of the date indicated below, none of which were in a continuous loss position for 12 months or more:
As of September 30, 2020 (In thousands) Fair Value Gross
Unrealized
Losses
Corporate debt securities $ 54,747  $ (88)
Municipal securities 2,328  — 
U.S. Government agency securities 24,762  (8)
U.S Treasury securities 18,564  — 
Total $ 100,401  $ (96)
As of June 30, 2020 (In thousands) Fair Value Gross
Unrealized
Losses
Corporate debt securities $ 44,429  $ (50)
Municipal securities 870  — 
U.S. Government agency securities 9,951  (7)
U.S Treasury securities 19,010  (2)
Total $ 74,260  $ (59)
The contractual maturities of securities classified as available-for-sale, regardless of their classification on our Condensed Consolidated Balance Sheets, as of the date indicated below were as follows:
As of September 30, 2020 (In thousands) Amortized Cost Fair Value
Due within one year $ 498,336  $ 500,622 
Due after one year through three years 325,659  327,011 
$ 823,995  $ 827,633 
As of June 30, 2020 (In thousands) Amortized Cost Fair Value
Due within one year $ 415,915  $ 418,169 
Due after one year through three years 325,459  327,894 
$ 741,374  $ 746,063 
Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Realized gains and losses on available-for-sale securities for the three months ended September 30, 2020 and 2019 were immaterial.