Markets end Flat after a volatile session: Volatility ruled the roost as key benchmark gave away a lion's portion of their intraday gains soon after extending gains in early afternoon trade. The broad market depictedweakness. The market breadth indicating the overall health of the market was weak. The Sensex snapped 8 day gains and ended lower by 11.86 points at 29559.1 and the Nifty was up 3.80 points at 8914.30. Foreign institutional investors (FPIs) were net buyers in Indian equities worth Rs 953 crore on Tuesday, as per provisional stock exchange data. The rupee appreciated against the dollar, up 3 paise to 61.37 on dollar.