Core Insights - The discussion highlights the BMO S&P/TSX 60 Index ETF (ZIU) as a lower-cost alternative to the iShares S&P/TSX 60 Index ETF (XIU), with a management expense ratio (MER) of 0.15% compared to XIU's 0.18% [1] - Trading volume is a significant factor in perceived liquidity, with ZIU trading approximately 2,700 units and XIU over 3 million shares on February 17, 2026, suggesting higher liquidity for XIU [1] Group 1: ETF Liquidity - Illiquidity poses risks for ETF investors, as thinly traded ETFs may execute market orders at unfavorable prices, and limit orders may not fill quickly [2] - Daily trading volume is often misunderstood; it is not the primary determinant of ETF liquidity, which is influenced more by the liquidity of the underlying securities [2][4] - The true value of an ETF is measured by its net asset value (NAV), which is the total value of the ETF's assets minus liabilities, divided by the number of shares outstanding [4] Group 2: Mechanisms of ETF Pricing - The market price of an ETF may differ from its NAV, trading at a premium or discount, with in-kind creation and redemption mechanisms maintaining alignment between the two [5][6] - Authorized participants play a crucial role in the creation and redemption process, allowing for the adjustment of ETF supply based on market demand [6][8] - If an ETF trades above its NAV, authorized participants can create new ETF units by buying underlying stocks, while the reverse occurs when trading below NAV [8] Group 3: Impact of Underlying Securities - The liquidity of an ETF ultimately depends on the efficiency of the in-kind creation and redemption process, rather than visible trading volume [8] - Highly liquid underlying securities, such as those in the S&P/TSX 60 index, enable authorized participants to quickly create or redeem ETF shares, even if the ETF itself has low trading volume [9] - Conversely, ETFs holding illiquid assets face higher costs and inefficiencies in the creation and redemption process, leading to meaningful liquidity concerns [10]