Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to financial market risks, including changes in interest rates, foreign currency exchange rates and marketable equity security prices. To mitigate these risks, we utilize derivative financial instruments such as foreign currency hedges. All of the potential changes noted below are based on sensitivity analyses performed on our financial position as of March 31, 2022. Actual results may differ materially.

As of March 31, 2022, we had an investment portfolio of fixed income securities of $1.0 billion. These securities, as with all fixed income instruments, are subject to interest rate risk and will decline in value if market interest rates increase. If market interest rates were to increase immediately and uniformly by 100 bps from levels as of March 31, 2022, the fair value of the portfolio would have declined by $9.5 million.

The fair market value of our long-term fixed interest rate Senior Notes is subject to interest rate risk. Generally, the fair market value of fixed interest rate notes will increase as market interest rates fall and decrease as market interest rates rise. As of March 31, 2022, our fixed rate Senior Notes had a principal amount, fair value and book value of $3.45 billion, $3.61 billion and $3.42 billion, respectively, due in various fiscal years ranging from 2024 to 2050.

As of March 31, 2022, we had outstanding $275.0 million aggregate principal amount of borrowings under our Revolving Credit Facility. We elected to pay interest on the borrowed amount at the London Interbank Offered Rate (“LIBOR”) plus a spread. The spread ranges from 100 bps to 175 bps based on the adjusted credit rating. The fair value of the borrowings under the Revolving Credit Facility is subject to interest rate risk only to the extent of the fixed spread portion of the interest rates, which does not fluctuate with changes in interest rates. As of March 31, 2022, if LIBOR-based interest rates increased by 100 bps, the change would increase our annual interest expense by approximately $2.4 million as it relates to our borrowings under the Revolving Credit Facility. Additionally, as of March 31, 2022, if our credit ratings were downgraded to be below investment grade, the maximum potential increase to our annual commitment fee for the Revolving Credit Facility is estimated to be approximately $1 million.

Our equity investment in a publicly traded company is subject to market price risk, which we typically do not attempt to reduce or eliminate through hedging activities. As of March 31, 2022, the fair value of our investment in the marketable equity security, which begun publicly trading on the Tokyo Stock Exchange on April 5, 2021, was $15.8 million. Assuming a decline of 50% in market prices, the aggregate value of our investment in the marketable equity security could decrease by approximately $8 million, based on the value as of March 31, 2022.

See Note 5 “Marketable Securities” to our Condensed Consolidated Financial Statements in Part I, Item 1 and “Risk Factors” in Part II, Item 1A of this Quarterly Report on Form 10-Q for additional details and risks that may affect the value of the investments in our portfolio as of March 31, 2022.

As of March 31, 2022, we had net forward and option contracts to sell $104.4 million in foreign currency in order to hedge certain currency exposures (see Note 16 “Derivative Instruments and Hedging Activities” to our Condensed Consolidated Financial Statements for additional details). If we had entered into these contracts on March 31, 2022, the U.S. dollar equivalent would have been $130.2 million. A 10% adverse move in all currency exchange rates affecting the contracts would decrease the fair value of the contracts by $93.1 million. However, if this occurred, the fair value of the underlying exposures hedged by the contracts would increase by a similar amount. Accordingly, we believe that, as a result of the hedging of certain of our foreign currency exposure, changes in most relevant foreign currency exchange rates should have no material impact on our results of operations or cash flows.