MUMBAI: The rupee ended the day at a new closing low of 83.21 against the dollar in the interbank foreign exchange market on Thursday as Asian currencies continued to weaken against the dollar. The onshore Yuan sank to 7.33 per dollar, its weakest since December 2007. The rupee opened around Wednesday's close of 82.14 and traded weak despite dollar sales by RBI. The dollar has been gaining ground against other currencies as yields on US bonds have risen on the expectation that the Federal Reserve could hike rates...