BHP's (BHP AT) Escondida mine has reportedly reached a preliminary agreement with Supervisor's Union and is to be ratified by members, with a strike being avoided, according to sources

Labour negotiations at Escondida are a recurring feature of the copper calendar, and the pattern is well established: strike threats at the world's largest copper mine tend to inject a risk premium into LME and COMEX copper and into treatment charges, with the premium unwinding once a preliminary deal is struck. Ratification by members is the remaining gate; preliminary agreements rejected at the ballot box are rare but not unheard of in Chilean mining, where rank-and-file votes have on past occasions overridden union leadership recommendations. Historically the episodes that mattered for supply were prolonged stoppages, which force concentrate market tightness and pressure spot TC/RCs lower, while averted strikes have typically seen any build-up of premium retraced quickly. Worth watching from here is the ratification vote itself and whether the terms concede wage or bonus levels that reset expectations for forthcoming negotiations at other large Chilean operations, since Escondida settlements have tended to act as a template for the peer set. For BHP the avoided stoppage removes a volume risk to guidance rather than changing the cost story materially.