China A-share cybersecurity sector opened higher; Zhongxin Saike posted its fourth consecutive daily limit-up. Qiming Information and Bohui Technology also hit the daily limit, while Tianrongxin, Yongxin Zhicheng, Zhongfu Information, Haohan Shendu and AsiaInfo Security advanced.

UK Prime Minister Burnham is weighing Saudi requests for diplomatic and military aid, including operational support to counter Houthi advances along Yemen’s Red Sea coast toward the Bab al‑Mandeb and to defend Saudi oil infrastructure; he has not yet decided. UK officials warned Houthi control of the Bab al‑Mandeb would be catastrophic for international shipping and could lift oil prices and inflation. London said the East–West oil pipeline might take up to six weeks to restore; Burnham has approved sending UK military advisers to support Saudi operations. A government spokesman said the UK will work with partners to support regional stability, and Foreign Secretary Miliband reiterated firm support for Saudi Arabia and the internationally recognised Yemeni government.

At the open in China's A-share market, the Shanghai Composite fell 0.14%, the Shenzhen Composite Index fell 0.17% and the ChiNext Index fell 0.14%. Fiber-optic, CPO and PCB-related stocks led declines.