IREN stock plunges 18% as Microsoft raises concerns over data center delays

IREN shares fell roughly 18% after reports that Microsoft raised concerns over delays at data center projects tied to IREN's AI cloud contracts. The transmission channel runs through contracted capacity: when a hyperscaler customer questions delivery timelines, the market reprices expected future revenue from leased compute, and high-beta AI infrastructure names tend to absorb the largest adjustments. Microsoft is the directly affected counterparty, so its exposure centers on whether capacity shortfalls could slow its own AI build-out and whether it must secure alternative supply from other providers, a dynamic that can pressure sentiment across the broader group of AI infrastructure suppliers. Traders should watch for any formal update from IREN on project timelines or contract status in its next earnings disclosure, as well as Microsoft's commentary on capital expenditure and capacity planning during its upcoming quarterly call.

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