Commonwealth Bank of Australia shares (ASX:CBA) have fallen sharply despite reporting a cash profit increase, highlighting underlying concerns about profitability and valuation. The 10.52% decline in the past week signals growing market apprehension, despite seemingly positive headline figures.
CBA shares have tumbled 10.52% in the last week, reflecting investor unease. The stock is now significantly underperforming its major rivals on a year-to-date (YTD) basis, rising only 3.13% compared to Westpac’s 22.99%, ANZ’s 35.89%, and NAB’s 14.58% gains.
The bank reported a cash profit of A$2.6 billion for the first quarter of fiscal year 2026, a 2% increase from the prior comparative period, in line with market expectations. However, the positive headline was overshadowed by a contracting Net Interest Margin (NIM), attributed to growth in lower-yielding liquid assets and institutional repos.
Liquid assets rose by A$12 billion, driven by a A$10 billion increase in institutional deposits, while repos increased by A$5 billion. According to CBA, excluding these factors, the underlying margin was slightly lower due to competition and ongoing deposit switching. Operating expenses also increased by 4%, influenced by wage and IT vendor inflation. The bank anticipates that process automation will help keep full-year expense growth at around 3%.
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Analysts have pointed to CBA’s stretched valuation as a contributing factor to the negative market reaction. With a forward price-to-earnings (P/E) ratio of 26, a dividend yield of 3%, and a price-to-book ratio of 3.8, CBA trades at a premium compared to its peers.
Bull Case:
- Solid A$2.6 billion cash profit reported for the quarter.
- Process automation may limit full-year expense growth.
- Strong growth in home lending and deposits.
Bear Case:
- Net Interest Margin (NIM) is contracting due to asset mix.
- Operating expenses rose by 4%, driven by inflation.
- Shares trade at a premium valuation compared to peers.
The recent share price decline underscores the market’s focus on underlying profitability metrics and valuation concerns, despite the bank’s solid headline profit figure. The contraction in NIM and rising operating expenses have raised questions about CBA’s ability to sustain its performance in an increasingly competitive environment. The underperformance relative to peers further amplified the negative sentiment.
