The Reserve Bank cannot arrest the rupee's decline if it is caused by weak fundamentals or global factors, but can only take more calibrated steps in the forex market in such a scenario, RBI deputy governor K.C. Chakrabarty said today.The government must address trade deficit issues if the fall of the rupee is due to weak fundamentals, he added."If the rupee is depreciating due to real sector issues, financial sector measures will no...