The ASX 200 experienced a significant downturn, shedding 99.6 points, or 1.13%, in a tumultuous session. The primary catalyst was the iron ore sector's downturn, with Simandou's production surge posing a threat to supply stability. This, coupled with broader base metals weakness, gold's decline, and heightened Middle East tensions, contributed to a broader market sell-off. Defensive sectors, such as utilities, healthcare, and consumer staples, emerged as safe havens, with utilities leading the charge. The market's volatility underscores the delicate balance between supply and demand dynamics, as well as the impact of geopolitical tensions on commodity prices and investor sentiment.