道瓊斯指數8月4日（週二）收盤上漲907.53點，漲幅1.71%，報54085.94點； 標普500指數8月4日（週二）收盤上漲136.02點，漲幅1.79%，報7736.52點； 納斯達克綜合指數8月4日（週二）收盤上漲671.10點，漲幅2.59%，報26584.99點。

Aug 4 — A-shares tied to co‑packaged optics (CPO) and compute hardware rallied sharply. Multiple names hit daily limits, including Yongding and Dongshan Precision; Tianfu Communication, Zhongji Xuchuang and Xinyisheng rose over 11%. The ChiNext index jumped more than 5% in the afternoon and a CPO-heavy communications ETF gained over 8%. NVIDIA senior VP Gilad Shainer said CPO has entered volume production and flagged vertical scale‑up as the largest future market opportunity for optical communications, with required bandwidth efficiency about ten times that of horizontal scale‑out. Separately, Phoenix cited Nikkei Asia reporting that AI-driven memory shortages have prompted HP, ASUS and Acer to start using small volumes of CXMT memory chips; the report pushed CXMT shares to reverse earlier losses and surge in the afternoon.

Toyota said it is assessing the impact of the Kumamoto earthquake; the effects have not been reflected in its full-year operating profit forecast.