Stock price when the opinion was issued
Money market exposure, but focused on government debt. Both buy instruments of less than a year's duration.
ZST is corporate debt -- slightly higher risk, so you get a premium yield. No junk bonds. Best-quality corporate bonds in Canada. Some credit risk, but quality holdings make this minimal. Money-market like, very safe, additional yield. Likes it.
Now paying 15-20 bps higher than a plain-vanilla high-interest savings ETF. Good if you need access to cash, never drops below where you bought it if you buy on the ex-dividend date. A cash-like position in your portfolio. Pays interest.
The sawtooth graph is explained as money accumulating on short-term paper holdings, and then paid out all at once every month. You can, of course, automatically reinvest the proceeds.