The most-traded January iron ore on China's Dalian Commodity Exchange ended morning trade 1.1 per cent higher at 842 yuan ($US115.31) per metric ton, after a three-session slump. The steelmaking ingredient, however, was confined in tight price ranges, with its gains capped by persistent worries about a deepening crisis in China's property sector. Iron ore futures rebounded on Tuesday after hitting nearly two-week lows in the previous session, as Beijing was seen preparing an additional sovereign debt issuance as part of efforts to spur economic growth.