BHP Shares Extend ASX Market Lead Into The Final Third of 2026

BHP shares (ASX:BHP) closed August 9.82% higher, consolidating its position as the largest company on the Australian Securities Exchange, as rival heavyweight Commonwealth Bank of Australia (ASX:CBA) slumped through one of its weakest months in recent memory.

The split between the two market leaders is indicative of what we see playing out on the ASX, a rotation from financials toward resources, with copper-linked earnings growth helping push the BHP share price to new ATHs.

BHP’s strong monthly gain came despite a 1.59% pullback in the final trading session of the period, a modest bout of profit-taking after the stock pushed into record territory. CBA moved in the opposite direction on the day, adding 1.69% in the last session, but still closed the month down 9.93%.

The net effect has been a dramatic reshaping of the top of the ASX, with BHP’s market cap now at A$336.73 billion versus CBA’s A$267.59 billion, a gap of A$69.14 billion.

The share price trajectory tells the story of relentless momentum. BHP began August trading just above A$60 and ground steadily higher through the month, setting a new record high at A$68.77. Over the past 12 months, the stock has gained 55%, while the CBA share price has fallen 5.36%.

What Has Driven The Share Price Gap

The rally rests on a substantial fundamental foundation. BHP’s FY26 results showed attributable profit up around 9% year-on-year, with underlying attributable profit rising about 30% to roughly US$13.2 billion and EBITDA climbing approximately 27%. Perhaps most significantly, the copper division overtook iron ore as the company’s largest earnings contributor, supported by record production and stronger metal prices.

That shift has reframed how markets value the business. Copper is increasingly viewed as a long-duration thematic tied to electrification, grid upgrades, renewable energy, electric vehicles, and the power demands of AI data-centre build-out, demand drivers that extend well beyond traditional commodity cycles.

Robust operating cash flow has allowed management to maintain a conservative balance sheet, with net debt sitting at around 0.3 times EBITDA, while declaring a full-year dividend of approximately US$1.72 per share. That combination of growth, yield, and balance-sheet strength has led some analysts to characterise BHP as a “quality cyclical” rather than a high-beta miner.

CBA’s struggles provide the mirror image. The bank faces slowing credit growth, margin pressure, intense competition, and persistent concerns around the Australian housing market, all of which have constrained earnings-growth expectations and weighed on sentiment toward the sector.

What Lay Ahead?

The macro backdrop remains the swing factor. If copper and iron ore prices stay elevated and energy-transition spending holds up, BHP is positioned to keep growing earnings and potentially extend its market-cap lead. Conversely, a reversal in commodity prices, or a recovery in bank profitability and loan growth, could rotate leadership back toward financials just as quickly.

August has firmly established BHP as the market’s preferred vehicle for copper-leveraged, cash-generative growth, backed by record earnings, low leverage, and a substantial dividend. Yet with the shares near all-time highs, trading above average broker targets, and carrying an outsized index weight, the same concentration and cyclicality that powered the rally now define the risks.

As we enter the final third of 2026, the setup between the two market leaders couldn’t be more different. BHP sits above, whilst CBA sits below the 200 day SMA, as one cools from overbought conditions, and the other cools from oversold. With the latest reporting season now wrapped up for both, it may be a period of the macro doing the legwork, with broader market sentiment potentially driving the direction from here. Whether that market leading gap widens or narrows into the final quarter of the year will be a tale for September’s roundup.