Crude oil benchmark quotation tumbles

After nearly a week of rising prices, crude oil benchmark quotation in the world market has dropped.

Analysts say that commodity dealers are adjusting to regain bargaining power to move into the year end.

At the London market, the Brent  crude trades at fifty one dollars per barrel. The price is weakened by twenty five cents.

For the OPEC basket brand, price steadies at forty eight dollars per barrel.