納斯達克生物科技指數在Moderna和默沙東的黑色素瘤疫苗在大型試驗中取得成功後上漲3.2%。

中國上證綜指8月19日（週三）收盤下跌95.88點，跌幅：2.4%，報3894.42點； 中國深證成指8月19日（週三）收盤下跌732.34點，跌幅：5.01%，報13890.15點； 中國滬深300指數8月19日（週三）收盤下跌137.12點，跌幅：2.9%，報4588.7點； 中國創業板指數8月19日（週三）收盤下跌232.07點，跌幅：6.26%，報3473.49點； 中國科創50指數8月19日（週三）收盤下跌123.35點，跌幅：6.89%，報1667.52點。

Fed minutes show officials have begun discussing a governor’s broader agenda, including potential reforms to the Fed’s operating framework. Participants said the upcoming balance-sheet-management review is an opportunity for a comprehensive discussion, but many attendees reiterated that adjusting the federal funds target range should remain the primary means of changing policy stance rather than altering the Fed’s asset holdings. The governor asked the C.BANK to consider cutting annual policy meetings from eight to six to allow two full months of data between meetings; no decision has been taken and the 2026 meeting schedule will not change.