BHP shares fall after the company flags a $2.3 billion writedown linked to its Jansen potash mine in Canada. Multiple reports say the charge follows further cost and time overruns for an expansion project at the operation. The writedown reflects updated expectations that expansion costs and the project schedule have deteriorated compared with prior estimates. Bloomberg and Yahoo Finance report that the announcement prompts a notable drop in BHP’s share price, with Financial Post describing it as the biggest one-day decline in about 14 months. The West Australian similarly reports the scale of the writedown and frames it as part of a continuing pattern of blowouts during the expansion, citing both cost increases and delays. In total, the coverage presents the same core points: BHP identifies the Jansen expansion as the driver of the impairment, attributes the writedown to higher-than-expected costs and extended timelines, and investors react negatively to the update.