Cisco Systems (CSCO) saw its stock fall more than 12% following a disappointing profit outlook that overshadowed a 10% revenue increase. The company attributed its gloomy forecast to rising memory-chip prices affecting profitability, while an expected Q3 gross margin of 65.5% to 66.5% fell short of the 68.2% consensus. As a result, Cisco emerged as a top decliner in the S&P 500, dampening broader tech stock performance.