Consider this low-cost exchange-traded fund to round out a large-cap equity holding.
As mid-cap funds go, this one is an odd duck, but it earns top marks.
An ultralow fee gives this fund a sustainable edge relative to category peers.
Strong past performance alone doesn't justify a dedicated mid-cap fund.
While this isn’t the only ETF that tracks the S&P MidCap 400 Index, a structural advantage gives this fund an edge.
For investors looking to build a portfolio based on rock-bottom fees, here's a list of funds and ETFs that can serve as building blocks.
See what we recommend for risk-averse ETF investors with 20-plus-year time horizons.