SHANGHAI, Aug. 25 (SMM)--SHFE lead prices fluctuated widely today, while domestic spot lead prices were still firm. Prices for well-known brands such as Nanfang, Chihong Zn & Ge and Chengyuan were around RMB 16,300/mt, with discounts of negative RMB 400-450/mt against SHFE 1110 lead contract prices. Other brands such as Jinli and Hanjiang were generally quoted at RMB 16,250/mt. The market was cautious due to pending QE3 by the US Federal Reserve, leaving transactions quiet.