SHANGHAI'S A share index closed down 3.13 points, or 0.08 per cent, at 3,798.85, based on Credit Lyonnais index, on reduced turnover as traders stayed sidelined before the listing of four more companies on Monday, according to brokers. ''The index is unlikely to waver much in the coming days amid cautious sentiment of investors in the face of the approaching new listings,'' one trader said. Dong Xin Electric Carbon was the top gainer, rising 1.65 yuan, or 21.29 per cent, to 9.40 yuan on volume of 8.32 million shares. Shanghai Petrochemical ended two days of losses, gaining 0.13 yuan, or 2.8 per cent, on volume of 8.57 million. Shanghai Petro was supported by buying by the lead underwriter of its new shares, Shanghai International Securities, traders said. The biggest loser was Shanghai Lianhua Industrial, which fell by 1.30 yuan, or 7.26 per cent, to 16.60 yuan on thin volume of 160,000 shares. The Credit Lyonnais Shanghai B index rose by 6.84 points, or 0.58 per cent, to 738.96 on volume of 12.61 million shares. Shanghai Goods and Materials Trade Centre made its debut, opening and closing at 27 US cents compared with its issue price of 25 cents. Shanghai Goods accounted for 71.84 per cent of total B-market volume with 9.06 million shares changing hands.