Saudi and Egyptian stock markets declined on October 25 as the conflict with Yemen's Houthis intensified. Saudi Arabia's benchmark index dropped 2.6%, its worst intraday performance since April 2025, pressured by broad-based selling as investors assessed the risk of the Yemen conflict becoming a broader regional war. Heavyweight Saudi Aramco fell 1.1%. Outside the Gulf, Egypt's blue-chip index tumbled 2.5%, eyeing its lowest level in nearly seven months, with all constituents in negative territory. Egypt's parliament is expected to vote on Monday on authorizing military support for Saudi Arabia, if requested, in the conflict.