Multiple China grain ETFs, including Guangfa, E Fund and Huaxia grain ETFs, rose more than 5%.

A-share indices opened lower, rallied briefly then slid; at midday the Shanghai Composite fell 0.39%, the Shenzhen Composite dropped 1.09% and the ChiNext index eased 1.3%. Turnover across Shanghai and Shenzhen was 1.64 trillion yuan, up 139.3 billion yuan from the prior session. More than 3,900 stocks were down. Grain-related names extended gains, with genetically modified/seed stocks leading—several seed producers including Qiule Seed, Nongfa Seed, Jingliang Holdings, Wanxiang Denong, Denghai Seed and Yasheng Group hit daily limits. Pork names were active: Luoniushan posted a second consecutive limit-up and Tianbang Foods hit the limit. Fertilizer, dairy and glass-substrate sectors outperformed. AI-related names underperformed, with Daheng Technology, Zhongguang Tianze and Kaipu Cloud among decliners. Compute-rental names plunged; Hongbo fell over 9%, and Xingyun Technology, Jinkai New Energy, Huijin and Qunxing Toys each fell more than 5%. Software development, cloud office and gaming sectors were also among the day’s laggards.

US 6-month Treasury auction on Aug 17: stop-out yield 3.78%, prior 3.83%.