Due to a lack of liquidity, market and stop-loss market (SL-M) orders are blocked during the first two minutes of the market opening, from 9:15 AM to 9:17 AM, for specific ETFs. Market and SL-M After Market Orders (AMO) will also remain blocked for these ETFs (DOC).
If you place a market or SL-M order for an ETF from 9:15 AM to 9:17 AM or place an AMO for these ETFs, the following error will be displayed: