But after Thursday's gains, Anglo American's London shares were trading up over 30% so far in 2024. BHP's offer comes as the world's most valuable miner looks to expand its copper operations amid expectations that a global push into electrification and green energy will boost demand for the red metal. Copper is a key ingredient in electricity transmission infrastructure, and also plays a vital role in electric vehicle production. BHP's takeover of Anglo could give the miner control over at least one-tenth of the world's copper production. Copper prices hit a two-year high earlier in April on expectations of tighter supplies, after major Chinese refiners signaled production cuts and as Russian metal exports were slapped with stricter Western sanctions. But prices cooled in recent sessions after top producer Chile said it intended to increase output at state-owned copper miner Codelco.