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CBA Shares Surge After Record Half-Year Profit as Rate Outlook Improves

CBA Shares Surge After Record Half-Year Profit as Rate Outlook Improves. Source: Shutterstock

Commonwealth Bank of Australia (ASX: CBA) shares jumped sharply on Wednesday after the country’s largest lender reported record-high cash earnings for the half year ended December, boosting investor confidence despite margin pressures and rising costs. The strong earnings result pushed CBA shares up nearly 6% in morning trade to around A$169.00, making the stock one of the biggest contributors to gains in the ASX 200 index, which rose approximately 0.7%.

The rally also lifted sentiment across the Australian banking sector. Shares in major peers Westpac Banking Corp (ASX: WBC), ANZ Group Holdings Ltd (ASX: ANZ), and National Australia Bank Ltd (ASX: NAB) rose between 1% and 3%, reflecting optimism around the broader outlook for bank earnings and interest rates.

CBA reported a cash net profit of A$5.45 billion for the six months to December 31, marking the highest half-year profit in the bank’s history. The result was driven by strong growth in home lending and business loans, alongside a solid increase in customer deposits. These factors helped offset pressures from tighter margins and higher operating expenses.

However, the bank’s net interest margin, a key measure of profitability, declined by 4 basis points to 2.04%. The drop was largely attributed to lower interest rates earlier in the period, which reduced returns on lending. In addition, CBA flagged higher expenses over the half year, primarily due to increased investment in technology upgrades, including initiatives focused on artificial intelligence and digital infrastructure.

The interest rate environment remains a key factor for CBA’s outlook. The Reserve Bank of Australia cut interest rates in 2025, albeit modestly. However, a rebound in inflation during the second half of the year prompted the RBA to hike rates in February for the first time in two years, with policymakers warning that further increases may follow if inflation remains persistent.

Higher interest rates could support CBA’s lending margins going forward, potentially improving profitability. At the same time, elevated borrowing costs may dampen loan demand, which could limit overall growth. Still, CBA’s record earnings, strong balance sheet, and dominant market position continue to make it one of the most closely watched ASX stocks heading into 2026.

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