BHP’s market cap overtakes CBA after copper stays above US$6.00/lb. CBA lost A$30B in a day. Alpha Score 75 rates BHP a moderate conviction play.
BHP Group Ltd (ASX: BHP) reclaimed the title of the ASX’s most valuable stock after Commonwealth Bank of Australia suffered its largest intraday drop on record, erasing roughly A$30 billion in market value. BHP shares held near A$60 as copper prices stayed above US$6.00 per pound, a combination that shifted market-cap rankings and opened a practical question: whether the rotation out of banks and into commodity stocks is a short-term valuation snapback or the start of a durable copper-driven leadership.
CBA’s weekly loss of 10% dragged the entire Big Four basket lower. NAB fell 8%, ANZ dropped 6%, and Westpac shed 9% over the same period. The sell-off handed BHP a lead it had not held so decisively since the 2021 iron ore boom. The difference this time is that copper, not iron ore, is doing the heavy lifting.
The CBA rout started with a quarterly earnings update and accelerated after a federal budget that reshaped capital gains tax rules. Together, the two shocks broke the bank’s premium valuation, which had been sustained by foreign inflows seeking an Australian safe-haven proxy.
CBA’s latest quarterly report showed key growth metrics essentially flat. The more worrying signal for investors was a credit impairment charge above $300 million. That figure is not large enough to threaten overall profitability. It punctured the narrative that Australian households remain entirely resilient. Bad debts trending higher, even from a low base, focused attention on mortgage arrears and consumer lending quality, the same risks that weigh on every Big Four balance sheet.
Treasurer Jim Chalmers announced changes to capital gains tax treatment, effective from July 2027. A flat 30% tax rate on gains after 12 months, combined with index inflation adjustments, removed a longstanding CGT discount that had benefited long-term equity investors. The budget detail suggested the government was designing a slow-motion cooling of asset ownership. The market reaction pointed to foreign institutional investors exiting positions quickly. CBA’s outperformance over the prior two years had been partly driven by inbound foreign direct investment that treated CBA as a liquid hedge against U.S. risks. The policy signal, even with a two-year delay, called that flow into question and accelerated the rotation toward commodity-linked names.
BHP’s copper division, spanning the Escondida, Pampa Norte, and Olympic Dam operations, delivered strong free cash flow as spot copper held above US$6.00 per pound. Copper accounts for roughly a quarter of BHP’s revenue. At current prices, its contribution to earnings is disproportionately large. The company has been investing in brownfield expansions such as the Spence Growth Option and guiding for 1.7 to 1.9 million tonnes of copper production in the current fiscal year, placing BHP among the world’s top producers.
Every major decarbonisation pathway – electric vehicles, grid upgrades, wind turbines, solar farms – draws on copper. Global copper demand is projected to grow at a compound annual rate of 3-4% through 2030, while supply growth is constrained by aging mines, declining ore grades, and extended permitting timelines. BHP’s portfolio of long-life, low-cost copper assets is not easily replicated. The copper megatrend, anticipated for half a decade, is now materialising as inventories remain tight and treatment charges have fallen, signalling a physical deficit.
BHP’s iron ore division still generates significant cash flow. It faces headwinds from China’s property slowdown that copper does not share. Copper’s demand base extends beyond construction to the energy transition, data centres, and industrial automation. The company’s strategic pivot toward copper and nickel acts as a hedge against a structural decline in steel-making raw material demand. The market cap crown, therefore, rests more on copper’s supply-demand dynamics than on iron ore prices.
Analysts at VanEck have pointed to further ASX strength coming from outside the financials sector. Their view lends weight to the commodities supercycle thesis that had been overshadowed by shipping disruptions in the Strait of Hormuz. BHP shares near A$60 reflect current earnings power and a modest premium for future copper upside. At roughly 5 times trailing EBITDA, BHP trades at a discount to global copper pure-plays, partly because the iron ore division anchors the multiple. Investors buying BHP at these levels are effectively paying for copper growth while receiving an iron ore dividend.
AlphaScala’s proprietary Alpha Score rates BHP Group Ltd at 75, a moderate conviction level. The score captures the supportive copper price environment, BHP’s low-cost asset base, and the rotation away from Australian bank stocks. It also reflects the commodity sensitivity that could swing the stock if copper falls below US$5.50 per pound or iron ore slides. The score suggests BHP fits as a credible allocation on a commodity-focused watchlist, not as an aggressive chase. For a deeper look at materials-sector valuation dynamics, see our earlier analysis on Rio Tinto’s stability premium and the broader commodities market picture.
BHP holds the top spot on the ASX because a bank-sector shock met a resilient copper price. Copper supply-demand dynamics remain tight, and BHP’s assets are well placed to capture that trend. The stock’s valuation already prices in a fair amount of optimism, however, leaving upside tied to further supply disruptions or a concrete Chinese infrastructure stimulus. Traders tracking BHP should monitor weekly copper futures, Chilean production reports, and any shift in CBA’s loan-loss trajectory. The practical level to watch is the US$5.50/lb floor: above it, the copper thesis stays intact; below it, BHP’s market-cap lead may prove temporary.
Prepared with AlphaScala research tooling and grounded in primary market data: live prices, fundamentals, SEC filings, hedge-fund holdings, and insider activity. Each story is checked against AlphaScala publishing rules before release. Educational coverage, not personalized advice.