You can buy and sell stocks and ETFs in a self-directed trading Tax-Free Savings Account (TFSA) with Wealthsimple. Gains you make from trades in these accounts are tax-free. The benefits of TFSAs are not limited to Canadian securities, as you can purchase and sell US-listed securities as well.

That being said, unlike Canadian dividends, any dividends issued from a US-listed stock or ETF may be subject to a non-resident withholding tax of generally 15% (levied by the IRS- the American revenue regulatory body).