大宗商品综述：原油和黄金价格走低 基本金属全线上涨

Group 1: Oil Market - Oil prices have declined for the third consecutive day as investors assess the possibility of a nuclear agreement between the U.S. and Iran, which could prevent military action against Iran [2][17] - WTI crude oil fell by 1%, settling below $66 per barrel, while Brent crude oil closed below $71 per barrel [2][19] - The market remains sensitive to news related to Middle Eastern conflicts, with skepticism about Iran's readiness to reach an agreement [2][17] Group 2: Base Metals - Base metals experienced a collective increase, with copper prices rising significantly [5][20] - London copper prices saw an intraday increase of 2.8%, reaching $13,228 per ton, while aluminum prices also saw a slight rise [6][21] - At the close, LME copper was up 2.3% at $13,166.5 per ton, and LME aluminum rose by 0.1% to $3,093.5 per ton [8][24] Group 3: Precious Metals - Gold prices fell after a four-day increase, driven by uncertainties in U.S. trade policy and escalating tensions in the Middle East [14][28] - Gold prices dropped by 2.5% at one point but recovered some losses due to a weaker dollar, ultimately down 1.2% at $5,165.65 per ounce [15][29] - The previous four-day rise in gold prices was attributed to safe-haven buying amid geopolitical tensions, with a total increase of over 7% [14][29]