On a trading day that saw broad-based growth across nearly all Australian market segments, a sharp downturn among the nation’s four largest lenders dragged the country’s benchmark ASX 200 into negative territory, with the Commonwealth Bank of Australia (CBA) posting its worst single-day performance in recent history. The Wednesday session closed with the ASX 200 down 40.30 points, or 0.46%, settling at 8630.40, while the broader All Ordinaries index slipped 0.32% to 8880.70, a drop of 28.90 points. Against this market shift, the Australian dollar strengthened slightly to trade at 72.38 U.S. cents. Notably, 10 of the 11 tracked market sectors closed the session in positive territory, making the overall index decline almost entirely attributable to the selloff in major financial stocks. The financial sector as a whole fell more than 4% following CBA’s release of its quarterly earnings and updated outlook, which spooked investor sentiment across the entire banking industry. CBA shares plummeted 10.43% to close at $153.67, erasing more than $25 billion from the bank’s total market capitalization in a single session. The lender reported a March quarter net profit of $2.7 billion, but what caught investor attention was its announcement of a $200 million increase in bad debt provisions. The bank cited mounting budgetary pressure on Australian households and businesses, amplified by geopolitical instability tied to the Israel-Iran regional conflict. Industry analysts say the move signals a growing cautious outlook across Australia’s major banking sector, as early signs of financial stress begin to emerge among consumers. “We are starting to see early signs of stress emerge more broadly,” explained Cameron McCormack, senior portfolio manager at global investment firm VanEck. “Arrears are edging higher across personal loans, home loans and credit cards, while total provisioning across the big four has risen to $6.5 billion. Importantly, this is not isolated to CBA. Provisioning has been stepping up across the major banks this reporting season, which is consistent with the cumulative impact of restrictive monetary policy beginning to bite.” McCormack added that persistent high inflation and a resilient labour market have created a dual pressure that is squeezing bank profits from both sides. “On the demand side, higher interest rates are weighing on consumers and slowing credit growth,” he said. “On the supply side, intense competition is limiting the ability for banks to reprice loans. As a result, net interest margins are increasingly being squeezed.” The market selloff triggered by CBA’s results pulled down the other three major Australian banks alongside it. Westpac closed down 2.84% at $35.57, the National Australia Bank (NAB) fell 1.50% to $36.86, and Australia and New Zealand Banking Group (ANZ) dropped 1.62% to $34.57. Outside the financial sector, strong gains in consumer discretionary stocks and mining shares helped offset much of the sector’s losses. Consumer conglomerate Wesfarmers added 0.35% to close at $71.55, while gaming firm Aristocrat Leisure surged 13.28% to $51.94 after reporting a robust first-half earnings report: normalised revenue hit $3.03 billion for the six months ending March 31, while net profit jumped to $725 million. Australia’s big three iron ore miners also posted solid gains. BHP closed up 2.91% at $61.52, Rio Tinto gained 1.93% to settle at $189, and Fortescue Metals climbed 2.78% to $22.52. A handful of other individual companies posted notable losses in Wednesday’s session. Buy now, pay later provider Zip fell 0.8% to $2.44 after Australia’s High Court ordered the firm to rebrand in the country over a successful trademark dispute. Pathology and medical diagnostics firm Healius plummeted 22.68% to $0.375 after it downgraded its full-year earnings guidance and announced the sale of its Agilex Biolabs subsidiary. Online furniture retailer Temple and Webster also slid 6.39% to $4.98 after it forecast underlying earnings of only $20 million to $22 million for the 2026 financial year, missing earlier market expectations.
Big four banks drag ASX 200 as Commonwealth Bank plunges, wipes $25bn from market
