MDY, which debuted in 1995, charges 0.25% per year. No stock accounts for more than 0.72% of the ETF’s weight. The fund’s largest sector weight is 23.1% to financials followed by 17% to industrials. Technology and consumer discretionary names combine for 28%. [Mid-Cap ETFs Outperforming]

Risk-tolerant investors looking to capture out-sized mid-cap gains can consider the Ultra MidCap400 ProShares (NYSEArca: MVV), which attempts to deliver twice the daily returns of the S&P MidCap400 Index. MVV is up 7.5% year-to-date, which is less than double the 4.3% gain for MDY.

SPDR S&P MidCap 400 ETF


ETF Trends editorial team contributed to this post.