Is SHY a good long-term hold, or too concentrated?

We cannot tell you whether SHY suits your situation — that depends on what else you hold and on your horizon. What we can set out is what the fund is.

SHY sits in our Bond category, focused on United States.

The question worth answering before buying is overlap: if you already own a broad market fund, check how much of SHY you effectively own already. Investors regularly add a sector or country fund believing they are diversifying when they are concentrating.

Cost is the part you can be certain about — 0.15% a year, every year, in every market condition.

The risk that shows up in practice is rarely the one on the factsheet. It is overlap: holding this fund alongside a broad market fund, and discovering the same companies are counted twice.

The second is behavioural. A narrower fund is harder to hold through a drawdown, and selling at the bottom costs far more than any expense ratio.