The iShares MSCI Australia ETF (EWA), which tracks the investment results of an index composed of Australian equities, is likely to be impacted by the negative surprise in Australia's current account for Q3. Investors may view this deficit as a sign of economic weakness, which could reduce investor confidence in Australian markets and, by extension, in EWA. However, the ETF's performance is also influenced by other factors, including global market conditions and commodity prices, which could mitigate the impact.