The most-traded May iron-ore contract on China's Dalian Commodity Exchange ended daytime trade 0.49% lower at 812 yuan ($116.55) a metric ton.
The benchmark February iron-ore contract SZZFG6 on the Singapore Exchange was 0.57% lower at $106.3 a ton as of 0800 GMT.
The Singapore contract has so far fallen 1.8% on the week, while the Dalian contract was down 0.3% week-on-week.
INCREASING STOCKS ACROSS CHINA'S MAJOR PORTS
Total stocks of imported iron-ore across China's major ports increased for the eighth straight week to a record high of 165.6 million tons, Mysteel data released on January 15 showed.
However, steel mill stocks fell 2.1% week-on-week and transaction volumes of portside iron-ore dropped 20.3% week-on-week, as high prices and slim margins made steel mills hesitant to buy more-ore.
