Global Market: European shares climb as earnings, US-Iran diplomacy lift sentiment

European stocks climbed on Wednesday as U.S.-Iran diplomatic talks lifted investor sentiment. The STOXX 600 index rose 0.4% to 659.29. Mining companies led the rally, while Sandoz and Siemens Energy gained on strong earnings. However, Novo Nordisk shares fell after drug trial setbacks, showing how corporate results still drive market moves.