Cisco Systems is trading 3.1% up at €97.75 as investors react to Wall Street Zen upgrading the stock from "hold" to "buy" today. - The upgrade follows the company's strong fiscal Q3 2026 earnings reported on May 13, which included double-digit revenue growth and significant AI infrastructure orders. - Cisco continues to be highlighted as a key AI infrastructure play, bolstering positive sentiment amidst broader technology sector volatility.