Item 3. Quantitative and Qualitative Disclosure about Market Risk
Interest Rate Risk
We are exposed to interest rate risk in connection with our senior secured credit facilities, which are subject to variable interest rates. As discussed in Note 7 - Derivatives and Hedging Activities in “Item 1 - Notes to Unaudited Consolidated Financial Statements,” we hedge a portion of our exposure to interest rate fluctuations through the utilization of interest rate swaps and caps in order to mitigate the risk of this exposure.
Based on the amount outstanding under our senior secured credit facilities at March 31, 2019, a one percentage point change in variable interest rates, after the effect of our interest rate swaps and caps effective at March 31, 2019, would cause an increase or decrease in interest expense of $36.2 million on an annual basis.
Foreign Currency Risk
We are subject to foreign currency risk as a result of our investments in foreign entities and revenues and expenses generated in currencies other than the U.S. dollar. As discussed in Note 7 - Derivatives and Hedging Activities in “Item 1 - Notes to Unaudited Consolidated Financial Statements,” we currently have net investment hedges in place to mitigate foreign currency risk. For the three months ended March 31, 2019 and 2018, currency rate fluctuations calculated by converting revenues and expenses for the three months ended March 31, 2019 and 2018 in local currency, using the December 31, 2018 and January 16, 2018 Legacy Worldpay acquisition date as the prior period rates, had an immaterial effect on our revenues and operating income.