Better Buy: Vanguard Mid-Cap ETF vs iShares Core S&P Mid-Cap ETF

Better Buy: Vanguard Mid-Cap ETF vs iShares Core S&P Mid-Cap ETF

Mid-cap ETFs, which track mid-sized companies, are an important diversifier as they are generally not as volatile as small caps but often have higher growth potential than large-caps. Let's take a look at the two most popular ETFs within the mid-cap space. The Vanguard Mid-Cap ETF (NYSEMKT: VO) is the second largest mid-cap ETF with about $50 billion in assets under management.