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The Markets

NZX50 slumps as Trump orders Iran blockade; a2 Milk sinks on profit warning

Monday 13th of April 2026

New Zealand’s S&P/NZX 50 index tumbled as US President Donald Trump’s proposed blockade of the Strait of Hormuz sent oil prices higher, and reignited fears of a protracted conflict in the Middle East.

The a2 Milk Co was a drag on the benchmark as it sank the most in 19 months after warning that supply disruptions threatened to knock earnings in the last few months of the...

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