Why Is Nokia (NOK) Stock Price Up 9.32% Today, August 12? Lumentum Earnings Lift Optical Networking Shares

Nokia shares jumped ~9% in a sector-driven rebound after Lumentum's strong results triggered a broad optical-networking rally, lifting sentiment across connectivity suppliers. There was no Nokia-specific earnings or guidance catalyst, but prior AI-infrastructure messaging kept the stock positioned as an AI-network beneficiary. Near-term focus shifts to whether peer strength persists and whether the move can clear nearby trend-resistance levels.