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

European stocks advanced on Wednesday, driven by U.S.-Iran diplomatic talks. Mining companies led the rally as geopolitical concerns eased for investors. Novo Nordisk shares fell despite an improved outlook due to drug trial setbacks. Sandoz surged on strong second-quarter net sales, boosting healthcare stocks. Siemens Energy also gained following record third-quarter results and robust demand.