Should First Trust Dow Jones Select MicroCap ETF (FDM) Be on Your Investing Radar?

First Trust Dow Jones Select MicroCap ETF (FDM) is a passively managed small-cap blend ETF with $271.32 million in assets. The fund has delivered strong returns of 18.45% year-to-date and 24.99% over the past year, with a Zacks ETF Rank of 2 (Buy). However, its 0.6% expense ratio is relatively high compared to competitors like Vanguard Morningstar Small-Cap ETF (0.03%) and iShares Core S&P Small-Cap ETF (0.06%).