Tech Mahindra enters into foreign exchange forward contracts and currency option contracts to hedge against foreign currency risk from amounts denominated in currencies other than the Indian rupee. Over half of Tech Mahindra's revenue comes from Europe while nearly a third comes from the US. Oracle also uses hedging techniques like foreign currency forward contracts to offset risks associated with foreign currency exposures from its global transactions and investments in international subsidiaries. Both companies closely monitor currency fluctuations and have hedging policies in place to manage their foreign exchange exposure.