(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) May 27 (Reuters) - European shares opened flat on Thursday, with losses in energy stocks offset by gains in the mining sector, while British bank HSBC’s decision to exit U.S. retail banking was met with a lukewarm reception. The pan-European STOXX 600 index was almost unchanged at 445.34 points in early trading, hovering just below a record high of 447.15 hit on Tuesday. Energy stocks fell about 0.3%, tracking declines in oil prices as concerns over Indian demand and increasing Iranian supplies weighed. But losses in the sector were offset by stronger mining stocks, which rose 0.8% on better metal prices. HSBC fell 0.2% after the lender said it was withdrawing from U.S. retail banking by selling some parts of the money-losing business and winding down others to focus on Asia, its biggest market. German sportswear firm Puma fell 1.1% after French luxury goods group Kering said it will sell a 5.9% stake in the firm through a share placement. (Reporting by Ambar Warrick in Bengaluru; Editing by Arun Koyyur) Our Standards: The Thomson Reuters Trust Principles.