Lumentum is trading 10.3% higher at $1071.00, driven by better-than-expected fourth-quarter results and an optimistic outlook on AI infrastructure demand. - The company's Q4 earnings topped Wall Street forecasts on both revenue and profit, flagging a coming demand inflection for optical components tied to AI and cloud data centers. - Bernstein initiated coverage on September 30 with an Outperform rating and a $1,220 price target, citing optical and networking suppliers as structural winners in AI infrastructure. - Broader markets were mixed on October 1, with Lumentum falling 0.23% on September 30.