Item 3. Quantitative and Qualitative Disclosures About Market Risk
ITEM 3: QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Interest Rate Risk
We are subject to the impact of interest rate changes and may be subject to changes in the market values of our future investments. We invest our excess cash in bank overnight deposits, money market funds and marketable securities. We have not used derivative financial instruments in our investment portfolio. Earnings from investments in bank overnight deposits, money market mutual funds, and marketable securities may be adversely affected in the future should interest rates decline, although such a decline may reduce the interest rate payable on any borrowings under our Revolving Credit Facility. Our future investment income may fall short of expectations due to changes in interest rates or we may suffer losses in principal if forced to sell securities that have declined in market value due to changes in interest rates. As of September 30, 2022, a 1% increase or decrease in interest rates would not have a material impact on our future earnings, fair values, or cash flows related to investments in cash equivalents or interest earning marketable securities.
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At September 30, 2022, we had $141.2 million outstanding under our Amended Credit Facility. Borrowings under the Amended Credit Facility bear interest at LIBOR or a base rate, plus a margin ranging from 1.50% to 2.00%, depending on our leverage ratio. An unused commitment fee ranging from 0.20% to 0.30%, depending on our leverage ratio, accrues on unused amounts under the Amended Credit Facility. An increase in LIBOR would affect interest expense on any outstanding balance of the Revolving Credit Facility. For every 100 basis points increase in LIBOR, we would incur an incremental $3.5 million in interest expense per year assuming the entire $350 million Revolving Credit Facility was utilized.
In March 2021, the administrator of LIBOR announced that the publication of certain LIBOR settings would cease after December 2021 and publication of the remainder of the LIBOR settings will cease after June 2023. At September 30, 2022, we had no exposure to the discontinued LIBOR settings and had approximately $141.2 million of LIBOR-based debt outstanding on our Revolving Credit Facility. Our Revolving Credit Facility includes mechanisms for replacing the applicable reference rate, which we do not expect to be materially different from LIBOR.
Foreign Currency Risk
The United States Dollar (“USD”) is our reporting currency. The functional currency of each of our foreign subsidiaries is the currency of the economic environment in which the subsidiary primarily does business. Revenues denominated in currencies other than the USD accounted for 22.3% of our consolidated revenues for the nine months ended September 30, 2022. We therefore have foreign currency risk related to these currencies, which is primarily the Australian dollar. Accordingly, changes in exchange rates, and in particular a weakening of foreign currencies relative to the USD may negatively affect our revenue and operating income as expressed in the USD. For the nine months ended September 30, 2022, a hypothetical 10% adverse change in the average foreign currency exchange rates would have decreased our consolidated revenues by approximately $17.7 million. In addition, the effect of exchange rate changes on cash, cash equivalents, and restricted cash for the nine months ended September 30, 2022 was a decrease of $10.7 million. We do not use foreign exchange contracts or derivatives to hedge any foreign currency exposures.
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