Can non-US citizens buy US stocks?

Yes, you don't need to be a US citizen to invest in US stocks. All you need is an investment account with a brokerage that provides access to stocks listed on US exchanges like the Nasdaq and NYSE. Compare brokerages in Canada that let you trade US stocks.

Is it possible to buy US stocks in Canadian dollars?

No. If you're buying US stocks in Canada, you'll need to convert your Canadian dollars to US dollars. However, you can use Canadian dollars to invest in TSX-listed ETFs that track the performance of US stocks like the Global X S&P 500 Corporate Class ETF (HXS) or the Invesco Nasdaq 100 Index ETF (QQC).

Do you pay tax on US stocks in Canada?

Yes, the CRA charges tax on profits from selling US stocks (which counts as capital gains) and income received from US stock dividends. But you don't have to pay dual tax in both Canada and the US, thanks to an agreement between both countries. Certain conditions apply, so check with a tax professional or a representative from your investment platform to find out what rules apply to you.