Mumbai, Oct. 13 -- The rupee appreciated 93 paise, logging its steepest single-day gain in more than six months, to close at 95.78 against the US dollar on Monday after the Reserve Bank of India over the weekend stepped in with several measures aimed at bolstering the domestic currency. At the interbank foreign exchange market, the rupee opened at 95.61 against the dollar; in intraday trade, the rupee touched a high of 95.57 and a low of 95.96 against the greenback. P12...