<h1>Rising bond yields trigger market volatility, sparking broad equity sell-off and shifting sectoral performance amid debt concerns.</h1> Benchmark Indian equity indices declined in response to rising US treasury yields and concerns over the US fiscal and credit outlook, causing broad-based global equity weakness; sectoral dispersion saw major blue-chips weigh on indices while select banks, telecom and cement stocks gained, and foreign institutional investors returned as net buyers on the prior session.