QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Interest Rate Risk
As of September 30, 2017, we have one interest rate swap agreement related to debt in Colombia. This swap has been designated as a cash flow hedge, has a notional amount of $25.1 million, has an interest rate of 5.74% and expires in April 2021. We also have three interest rate swap agreements related to the 2.250% senior unsecured notes due 2022 (the “2.250% Notes”). These swaps have been designated as fair value hedges, have an aggregate notional amount of $600.0 million, have an interest rate of one-month LIBOR plus applicable spreads and expire in January 2022.
Changes in interest rates can cause interest charges to fluctuate on our variable rate debt. Variable rate debt as of September 30, 2017 consisted of $1,055.0 million under the 2014 Credit Facility, $1,959.9 million under the 2013 Credit Facility, $1,000.0 million under the Term Loan, $600.0 million under the interest rate swap agreements related to the 2.250% Notes, $69.8 million under the South African credit facility, $25.1 million under the Colombian credit facility after giving effect to our interest rate swap agreement, $98.6 million under the BR Towers debentures and $41.4 million under the Brazil credit facility. A 10% increase in current interest rates would result in an additional $10.0 million of interest expense for the nine months ended September 30, 2017.
Foreign Currency Risk
We are exposed to market risk from changes in foreign currency exchange rates primarily in connection with our foreign subsidiaries and joint ventures internationally. Any transaction denominated in a currency other than the U.S. Dollar is reported in U.S. Dollars at the applicable exchange rate. All assets and liabilities are translated into U.S. Dollars at exchange rates in effect at the end of the applicable fiscal reporting period and all revenues and expenses are translated at average rates for the period. The cumulative translation effect is included in equity as a component of Accumulated other comprehensive loss. We may enter into additional foreign currency financial instruments in anticipation of future transactions to minimize the impact of foreign currency fluctuations. For the nine months ended September 30, 2017, 44% of our revenues and 49% of our total operating expenses were denominated in foreign currencies.
As of September 30, 2017, we have incurred intercompany debt that is not considered to be permanently reinvested and similar unaffiliated balances that were denominated in a currency other than the functional currency of the subsidiary in which it is recorded. As this debt had not been designated as being a long-term investment in nature, any changes in the foreign currency exchange rates will result in unrealized gains or losses, which will be included in our determination of net income. An adverse change of 10% in the underlying exchange rates of our unsettled intercompany debt and similar unaffiliated balances would result in $92.3 million of unrealized losses that would be included in Other expense in our consolidated statements of operations for the nine months ended September 30, 2017.
CONTROLS AND PROCEDURES
Disclosure Controls and Procedures
We have established disclosure controls and procedures designed to ensure that material information relating to us, including our consolidated subsidiaries, is made known to the officers who certify our financial reports and to other members of senior management and the Board of Directors.
Our management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on this evaluation, our principal executive officer and principal financial officer concluded that these disclosure controls and procedures were effective as of September 30, 2017 and designed to ensure that the information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the requisite time periods specified in the applicable rules and forms, and that it is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.