Key indices end with marginal gains; Rupee weakens slightly against US Dollar

At the domestic stock markets, key indices ended with marginal gains today, while the Rupee weakened slightly against the US Dollar. In the international markets, Brent crude oil prices rose sharply towards USD 68 a barrel.    The Sensex at the Bombay Stock Exchange gained 111 points, or 0.2 per cent, to close at 50,652, today. The Nifty at the National Stock Exchange moved up 22 points, or 0.2 per cent, to end at 15,198.   In global equity markets, key indices in Asia Pacific ended mixed. So Ja...