Rio Tinto's iron ore division chief Simon Trott says the company is taking the lost radioactive capsule in Western Australia "very seriously", while the Australian share market slips from its nine-month high.
This cautious mood comes ahead of a busy week, during which the US Federal Reserve, Bank of England and European Central Bank are due to lift interest rates in an effort to bring inflation down from a multi-decade high.
Scroll down to see how the trading day unfolded.