MUMBAI, Sept 3: The Indian rupee reversed all the gains made earlier in the day to close at an all-time low of 71.21 per dollar on Monday, tracking a weak trend among its global peers and amid concerns of a wider trade deficit. On Friday, it settled at 70.99-71, after hitting a low of 71 per greenback. Currencies across emerging markets have been lately subdued due to the global trade war concerns, analysts said. (IANS)