The Tadawul All Share Index (TASI) reversed earlier gains to close 1.6% lower at 10,831 points, marking its worst single-day decline since April. The drop followed mixed regional market performance and renewed investor caution over global economic slowdown concerns. Key sectors under pressure included banking (-2.3%) and industrial (-1.8%) stocks, with Saudi Basic Industries Corporation (SABIC) down 2.1% and Saudi Investment Bank (SIB) falling 3.5%. This decline reflects broader market volatility as investors reassess risk appetite amid rising U.S. Treasury yields and geopolitical tensions in the Red Sea. The Saudi equity market's sensitivity to global macroeconomic factors is evident, with foreign ownership restrictions and limited liquidity amplifying short-term swings. Traders should monitor upcoming earnings reports and central bank policy signals for potential catalysts. For Gulf investors, the decline underscores the need for diversified portfolios to mitigate sector-specific risks. The 10,800 level now acts as critical support; a break below this could trigger further technical selling. Key watchpoints include the Saudi Central Bank's response to domestic liquidity conditions and any policy adjustments by the Ministry of Investment to stabilize market confidence.