China's major A-share indexes opened lower on August 11, with the STAR Composite Index dropping 1.22% to 1,987.74 and underperforming the main board as investors took profits in previously popular aerospace and frontier-technology themes. The Shanghai Composite opened at 3,950.71, down 0.4%, the Shenzhen Component at 14,266.44, down 0.35%, and the ChiNext at 3,533.89, down 0.09%. Satellite internet, commercial aerospace and space computing stocks led declines, while oil and gas, coal and precious metals rose as higher international commodity prices, geopolitical uncertainty and unsettled global monetary policy expectations supported demand for safe-haven assets. Hunan Silver rose more than 5% at one point, and Zhaojin Gold, Chifeng Gold and Shengda Resources traded higher. Trading sentiment was more resilient in pockets of the market, with debut stocks N Chaochun, N Guoyi and N Jiakai opening up more than 581%, 418% and 216% respectively. Jinyuan United Securities said systemic risk for the major indexes remained manageable but warned that limited valuation upside, unclear external monetary policy paths and geopolitical and economic disturbances were raising the difficulty of investing. The firm recommended a barbell strategy that balances technological innovation exposure with high-dividend assets as sector rotation accelerates.