The S&P/ASX 200 Index shed 0.19% to close at 8,819 on Tuesday, reversing gains from earlier in the session as a steep drop in Commonwealth Bank dragged the broader market lower. Shares of Australia’s largest lender slumped 6.6% amid a narrowing net interest margin, as the bank held more cash and low-yield liquid assets. National Australia Bank also lost 1.3%, while ANZ Group and Westpac Banking rose 0.4% and 1.3%, respectively. Other notable decliners include healthcare firm CSL Ltd (-0.4%), iron ore miner Fortescue (-0.2%) and logistics software company Wisetech Global (-0.3%). On the data front, a private survey showed Australian consumer sentiment surged 12.8% month-on-month in November, the strongest rise in years, reflecting clearer signs of economic recovery and easing external risks.