Item 3. Quantitative and Qualitative Disclosures About Market Risk
ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Foreign currency exchange rate risk
We have foreign-based operations, primarily in Europe, South America and Asia, which accounted for approximately 22 percent of our net sales in the first nine months of 2020. Ingevity's significant operations outside the U.S. have designated the local currency as their functional currency. The primary currencies for which we have exchange rate exposure are the U.S. dollar versus the euro, the Japanese yen and the Chinese renminbi. In addition, certain of our domestic operations have sales to foreign customers. In the conduct of our foreign operations, we also make inter-company sales. All of this exposes us to the effect of changes in foreign currency exchange rates. Our earnings are therefore subject to change due to fluctuations in foreign currency exchange rates when the earnings in foreign currencies are translated into U.S. dollars. Foreign exchange forward contracts are used to hedge firm and highly anticipated foreign currency cash flows. The U.S. dollar versus the euro is our most significant foreign currency exposure. A hypothetical 10 percent change in the average euro to U.S. dollar exchange rate during the nine months ended September 30, 2020, would have changed our net sales and income before income taxes by approximately $2.8 million or less than one percent and $2.4 million or one percent, respectively.
Interest rate risk
Our revolving credit facility and term loan facility each include a variable interest rate component. As a result, we are subject to interest rate risk with respect to such floating-rate debt. A 100 basis point increase in the variable interest rate component of our borrowings as of September 30, 2020 would increase our annual interest expense by approximately $9.0 million or 27 percent.
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We have entered into fixed-to-fixed cross-currency interest rate swaps with an aggregate notional amount of $166.2 million to limit exposure to interest rate increases related to a portion of the Company's floating rate indebtedness. This swap agreement hedges a portion of contractual floating rate interest through its expiration in July 2023. As a result, the Company's weighted average effective interest rate on the notional amount floating rate indebtedness will be 3.79% through May 2021. The fair value of this instrument at September 30, 2020 was an asset (liability) of $(0.4) million.
Other market risks
Information about our other remaining market risks for the period ended September 30, 2020 does not differ materially from that discussed under Item 7A of our 2019 Annual Report.
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