SHANGHAI, May 26 (SMM) - Petroleum coke: The quotes generally stood stable this week. According to SMM research, the ex-factory quotation of Tahe Petrochemical was 1,770 yuan/mt on May 25, which was stable week-on-week, versus 1,460 yuan/mt by Guangzhou Petrochemical (+3.55%), 1,560 yuan/mt by Yangzi Petrochemical (flat WoW). Domestic petroleum coke supply decreased because of the petrochemical plants’ maintenance, but the demand grew somewhat with the slowly growing aluminium capacities and the slight pick-up of anode material market. However, the petroleum coke price hike was greatly suppressed by the high stocks at ports. SMM presumes that the short-term petroleum coke prices will move rangebound.