Item 3. Quantitative and Qualitative Disclosures About Market Risk

We have exposure to several types of market risk, including changes in interest rates, foreign currency exchange rates, and equity prices. See Part II, Item 7A, "Quantitative and Qualitative Disclosures About Market Risk" in our Annual Report on Form 10-K for the year ended December 31, 2022 for additional information on our policies and how we manage our exposure to such risks.

See Note 9 to our Unaudited Consolidated Financial Statements for additional information about our convertible senior notes and other debt. Excluding the effect on the fair value of our convertible senior notes, a hypothetical 100 basis point (1.0%) decrease in interest rates would have resulted in an increase in the estimated fair value of our other debt of approximately $630 million at June 30, 2023. Our convertible senior notes are more sensitive to the equity market price volatility of our shares than changes in interest rates. The fair value of the convertible senior notes will likely increase as the market price of our shares increases and will likely decrease as the market price of our shares falls.

We face exposure to movements in foreign currency exchange rates as the financial results and the financial condition of our businesses outside of the U.S., which represent a substantial majority of our financial results, are translated from local currencies (principally Euros and British Pounds Sterling) into U.S. Dollars. See Notes 9 and 14 to our Unaudited Consolidated Financial Statements and Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations for additional information about foreign currency transaction gains and losses, changes in foreign currency exchange rates, the impact of such changes on the increase in our revenues and operating margins, and our designation of certain portions of our Euro denominated debt as a hedge of the foreign currency exposure of the net investment in certain Euro functional currency subsidiaries.

See Notes 5 and 6 to our Unaudited Consolidated Financial Statements for additional information about our investments in equity securities of publicly-traded companies and private companies. A hypothetical 10% decrease in the fair values at June 30, 2023 of such investments would have resulted in a loss, before tax, of approximately $40 million being recognized in net income.