推荐买 SHV 来 park cash, 每月付股息，年股息 5% 左右，波动很小

This is a very simple ETF. It holds short-term Treasuries. The duration is very low, and the credit quality is all Treasuries, so you can expect volatility to be extremely low.

The 52-week range is from $109.85 to $110.63. That's quite a bit less than a 1% move for the very wildest trades.

You can see that it simply moves up before going ex-dividend, then drops on the ex-dividend date