If you're interested in broad exposure to the Mid Cap Value segment of the US equity market, look no further than the WisdomTree U.S. MidCap ETF (EZM), a passively managed exchange traded fund launched on 02/23/2007.The fund is sponsored by Wisdomtree. It has amassed assets over $703.74 million, making it one of the average sized ETFs attempting to match the Mid Cap Value segment of the US equity market.Why Mid Cap ValueMid cap companies, with market capitalization in the range of $2 billion and $10 billion, offer investors many things that small and large companies don't, including less risk and higher growth opportunities. Thus they have a nice balance of growth potential and stability.Carrying lower than average price-to-earnings and price-to-book ratios, value stocks also have lower than average sales and earnings growth rates. When you look at long-term performance, value stocks have outperformed growth stocks in nearly all markets. But in strong bull markets, growth stocks are more likely to be winners.CostsSince cheaper funds tend to produce better results than more expensive funds, assuming all other factors remain equal, it is important for investors to pay attention to an ETF's expense ratio.Annual operating expenses for this ETF are 0.38%, putting it on par with most peer products in the space.It has a 12-month trailing dividend yield of 1.61%.Sector Exposure and Top HoldingsEven though ETFs offer diversified exposure which minimizes single stock risk, it is still important to look into a fund's holdings before investing. Luckily, most ETFs are very transparent products that disclose their holdings on a daily basis.This ETF has heaviest allocation to the Financials sector--about 20.50% of the portfolio. Consumer Discretionary and Industrials round out the top three.Looking at individual holdings, Cleveland-Cliffs Inc (CLF) accounts for about 1.13% of total assets, followed by Organon & Co (OGN) and Ovintiv Inc (OVV).The top 10 holdings account for about 7.95% of total assets under management.Performance and RiskEZM seeks to match the performance of the WisdomTree U.S. MidCap Earnings Index before fees and expenses. The WisdomTree U.S. MidCap Index is a fundamentally weighted index that measures the performance of earnings-generating companies within the mid-capitalization segment of the U.S. Stock Market.The ETF has lost about -16.02% so far this year and is down about -8.26% in the last one year (as of 06/27/2022). In the past 52-week period, it has traded between $45.15 and $57.18.The ETF has a beta of 1.22 and standard deviation of 30.65% for the trailing three-year period, making it a medium risk choice in the space. With about 580 holdings, it effectively diversifies company-specific risk.AlternativesWisdomTree U.S. MidCap ETF holds a Zacks ETF Rank of 2 (Buy), which is based on expected asset class return, expense ratio, and momentum, among other factors. Because of this, EZM is an outstanding option for investors seeking exposure to the Style Box - Mid Cap Value segment of the market. There are other additional ETFs in the space that investors could consider as well.The iShares Russell MidCap Value ETF (IWS) and the Vanguard MidCap Value ETF (VOE) track a similar index. While iShares Russell MidCap Value ETF has $13.56 billion in assets, Vanguard MidCap Value ETF has $15.11 billion. IWS has an expense ratio of 0.23% and VOE charges 0.07%.Bottom-LinePassively managed ETFs are becoming increasingly popular with institutional as well as retail investors due to their low cost, transparency, flexibility and tax efficiency. They are excellent vehicles for long term investors.To learn more about this product and other ETFs, screen for products that match your investment objectives and read articles on latest developments in the ETF investing universe, please visit Zacks ETF Center. Want key ETF info delivered straight to your inbox? Zacks’ free Fund Newsletter will brief you on top news and analysis, as well as top-performing ETFs, each week.Get it free >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report WisdomTree U.S. MidCap ETF (EZM): ETF Research Reports ClevelandCliffs Inc. (CLF): Free Stock Analysis Report Vanguard MidCap Value ETF (VOE): ETF Research Reports iShares Russell MidCap Value ETF (IWS): ETF Research Reports Ovintiv Inc. (OVV): Free Stock Analysis Report Organon & Co. (OGN): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research