The Sensex fell 1.5% or 256.59 points to close at 17232.55, driven by negative market sentiment following disappointing Infosys results and a downward revision of its guidance. Despite a higher-than-expected industrial production growth of 2.4%, the market breadth was negative, with significantly more declining stocks than advancers. Key losers included Infosys, which dropped 8.4%, along with other major companies, while real estate and oil & gas sectors were the few gainers.