Stock price when the opinion was issued
Underperformed the last couple of years. Low volatility was all the rage when we had some corrections. We might have some more corrective action in US stocks, Warren Buffett has a massive cash hoard, Stanley Druckenmiller's calling for 0% growth in US stocks for 10 years. Volatility is tempered with ZLU -- it will go down less in a correction, but up less too. You might decide to stick with this for the long term.
XST is made up of Canadian retail grocers. Huge weight in Loblaw and Couche-Tard, making up about half of the ETF. Rest will be Metro, Weston, Empire, Saputo, Maple Leaf. Somewhat resilient. No matter what happens in an economy, people need groceries. Less volatility than ZLU.
ZLU is low volatility exposure to a broader cohort of stocks, not just consumer staples. A US play. Lower volatility, but broader economic exposure. Will tend to outperform the S&P 500 in a market correction. Really likes it.