Commonwealth Bank of Australia (ASX: CBA) shares are back in the spotlight on Thursday, 18 December 2025 — not because the bank dropped a blockbuster announcement, but because the market is juggling three forces at once: year-end options expiry volatility, a shifting interest-rate outlook for 2026, and a persistent debate about whether CommBank’s valuation still makes sense at today’s price.

As of 18 December, CBA was trading around A$154.56, up modestly on the day, after moving between A$153.11 and A$154.67. Investing.com’s snapshot put CBA’s market capitalisation at roughly A$258 billion and showed a 52‑week range of A$140.21 to A$192.00 — a reminder that the share price is still well below its mid‑year highs even after…