贵金属板块8月21日跌0.04%，招金黄金领跌，主力资金净流出3.54亿元

Group 1 - The precious metals sector experienced a slight decline of 0.04% on August 21, with Zhaojin Gold leading the drop [1] - The Shanghai Composite Index closed at 3771.1, up 0.13%, while the Shenzhen Component Index closed at 11919.76, down 0.06% [1] - Key individual stocks in the precious metals sector showed varied performance, with notable declines in stocks like Zhiyuan Gold (-1.22%) and Hunan Silver (-1.22%) [1] Group 2 - The net capital outflow from the precious metals sector amounted to 354 million yuan, while retail investors contributed a net inflow of 243 million yuan [3] - The capital flow data indicates a mixed sentiment among different investor types, with institutional investors showing a net outflow [3] Group 3 - The gold stock ETF (product code: 159562) tracks the CSI Hong Kong-Shenzhen Gold Industry Stock Index and has seen a slight decline of 0.18% over the past five days [6] - The ETF's current price-to-earnings ratio stands at 21.25, with a recent reduction in shares by 19 million, while there was a net inflow of 11.61 million yuan from main capital [6]