At the stock markers, the Sensex at the Bombay Stock Exchange lost its opening sheen dropping gradually by noon. While it gained 200 points in the opening trade, it was lower by 174 points at 31425 a short while ago. Nifty at the NSE followed suit, losing 50 points at 9821.The rupee weakened further for the fifth consecutive session to hit fresh six-month low of 65.67 against the US dollar.