The shares of Australia's iron ore producers fell in recent trading on Thursday, as they tracked a weaker iron ore price.
The shares of Fortescue (ASX:FMG) fell 2.8%, while those of Rio Tinto Group (ASX:RIO) were down 1.2%.
Platts, part of S&P Global Commodity Insights, proposed changing the benchmark grade for its Iodex iron ore index to 61% iron content from the current 62% due to falling quality of Australian iron ore, Bloomberg News reported Wednesday.