European shares opened lower on Thursday after a broad advance in Asia spurred by a rebound on Wall Street.Upbeat economic updates and a steady flow of quarterly reports from U.S. companies have helped counter worries over surging share prices for Big Tech companies.But that optimism failed to carry over from Asia to Europe.Germany's DAX lost 0.2% to 24,003.24, while the CAC 40 in Paris declined 0.5% to 8,033.11. Britain's FTSE 100 slipped 0.2% to 9,761.18.The future for the S&P 500 was virtually unchanged ...