Iron ore edges higher in early Asian trading. Concerns over tightening supply from mines in Australia and Brazil mines remain, while iron ore inventories at Chinese ports fell last week, ANZ says, citing data from market research firm Shanghai Steelhome. Still, demand has weakened with Chinese steelmakers facing margin pressure. Production costs have also risen following a fatal coal-mining accident in the Shanxi province last month, which pushed coke prices higher, ANZ adds. The most actively traded September contract on the Dalian Commodity Exchange is up 0.1% at 743.00 yuan a ton. (jason.chau@wsj.com)