Oil prices down on profit-taking after two-day jump

Oil prices dropped on Friday on profit-taking, after rising 7 percent in the past two sessions, amid doubts that OPEC's first planned output cut in eight years would make a substantial dent in the global crude glut. The Organization of the Petroleum Exporting Countries (OPEC) agreed on Wednesday to cut output to 32.5-33.0 million barrels per day (bpd) from around 33.5 million bpd, estimated by Reuters to be the output level in August. OPEC said other details will be known at its policy meeting i