Even money market funds have some risk. BOXX吸引人的地方在於稅務。但是你讀讀下麵這個文章。
在稅務優惠上也是有疑問地。
And expense ratio 0.2%.
The purpose of cash is safety and liquidity. It is not even for chasing yield. Let cash be cash. If you need yield, take risk at some other places where you can also get some growth.