Yantai Wanhua Maleic Anhydride Auction on February 5: The East China session failed to conclude. PriceSeek Analysis of Maleic Anhydride, Bull-Bear Score: -1.5. The failure to conclude the auction in the East China session indicates weak market demand, an imbalance between supply and demand, and low buyer interest, which may lead to downward pressure on spot prices of maleic anhydride. A score of -1.5 reflects a generally bearish impact, as the failure to conclude the auction, while not an extreme or major event, directly points to short-term demand insufficiency and downward price pressure.