南华商品指数：贵金属板块领涨，金属板块领跌

Report Summary 1. Index Performance - Today, the Nanhua Composite Index fell by -0.36% based on the closing prices of adjacent trading days [1][9]. - Among the sector indices, the Nanhua Precious Metals Index had the largest increase of 1.04%, while the Nanhua Agricultural Products Index had the smallest increase of 0.38%. The Nanhua Metal Index had the largest decline of -1.01%, and the Nanhua Black Index had the smallest decline of -0.74% [1][9]. - Among the theme indices, the Oilseeds and Oils Index had the largest increase of 0.23%, and the Economic Crops Index had the smallest increase of 0.08%. The Building Materials Index had the largest decline of -1.56%, and the Energy Index had the smallest decline of -0.15% [1][9]. - Among the single - variety commodity futures indices, the largest decline was seen in carbonate with a decline of -4.8% [9]. 2. Some Single - Variety Index Data - Palm oil had a change of 0.76% and -0.35%, rapeseed oil had -0.22% and -0.02%, and corn had -0.04% [4]. - In the energy - chemical sector, synthetic ammonia had a decline of -3.04%, vinyl chloride had -2.07%, polyethylene had -1.12%, PTA had -0.21%, and crude oil had -0.12% [9]. 3. Other Information - The Nanhua Commodity Index eliminates price changes during contract roll - over and reflects the actual return on investing in commodity futures [5]. - The calculation method of contribution is the product of the daily change rate and the weight, and the contribution of a certain variety is calculated as the daily change rate of the variety divided by the sum of the daily change rates of all varieties [5].