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A healthcare shock sent the S&P/ASX 200 1.2% lower to 8,843.6 points this Wednesday. Banks and gold stocks also weighed on the index. Cochlear dived almost 40% to a 10-year low, after flagging softer trading in developed markets since January, as well as uncertainty tied to the Middle East conflict and a stronger Aussie dollar. US President Donald Trump extended the ceasefire with Iran, driving mixed moves across energy stocks. Woodside Energy edged lower while Santos closed flat. Meanwhile, Ampol reported a sharp lift in first-quarter refining margins at its Lytton facility, as global margins surged in March, sending shares up almost 4%. BHP rose 1.2% after a quarterly iron ore beat, though brokers remained cautious on the copper outlook. Meanwhile, Northern Star slipped following weaker gold production in its latest update. In other corporate news, Treasury Wine Estates jumped 17% to be the best performer on the 200 after announcing a shift to a new regional operating model, while reaffirming its FY26 outlook. Overnight, US earnings are due from Tesla and Boeing. Locally, quarterly updates are expected tomorrow, from DroneShield, PLS and Santos.