To ensure we get the best possible price on the transaction for you, it's important to not have news of the trade leak out beforehand. 

When Wealthsimple makes a big trade, it can have a material impact on the value of the ETFs that we trade. This is referred to as moving the market. If we announced in advance which securities we intend to buy or sell, this could have the effect of dramatically driving up or down the price of ETFs our clients currently own or are scheduled to own. So it’s really important this information stays quiet until after clients have new securities in their accounts. 

Our primary duty is to always act in the best interest of our clients. Ensuring we get the best possible price on trades for you is a key part of fulfilling this duty.