Reuters | Oil up for seventh day but first-half drop biggest since 1998 Reuters Oil prices have generally increased in first half of most years. Trading volume was low ahead of the U.S. Independence Day holiday weekend. Last week, crude hit a 10-month low as rises in output revived concerns about global oversupply. The U.S. dollar . Goldman explains how it really blew it on its bullish oil call this year Oil tallies 6-session climb to end at a more than two-week high Oil Caps Longest Winning Streak Since April as US Output Slows |