Stock price when the opinion was issued
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.
Pays a slightly higher yield than cash-alternative ETFs. Gives you exposure to money market, but combines with other instruments to get a little bit of extra yield. A bit riskier than cash. Note that the chart will look funny.