Better ETF: Vanguard's Mega-Cap MGK vs. iShares' Small-Cap IWM

Core Insights - The Vanguard Mega Cap Growth ETF (MGK) and iShares Russell 2000 ETF (IWM) differ significantly in cost structure and investment focus, with MGK being more cost-effective and concentrated in technology, while IWM offers broader small-cap exposure and higher yield [2][3]. Cost & Size Comparison - MGK has an expense ratio of 0.07%, while IWM's is 0.19%, making MGK the more affordable option [4]. - As of January 22, 2026, MGK's one-year return is 14.4%, compared to IWM's 18.2% [4]. - MGK has a dividend yield of 0.4%, whereas IWM offers a higher yield of 1.0% [4]. - MGK has assets under management (AUM) of $32.5 billion, while IWM has $73.7 billion [4]. Performance & Risk Comparison - Over the past five years, MGK experienced a maximum drawdown of -36.01%, while IWM's was -31.91% [6]. - An investment of $1,000 in MGK would have grown to $1,929 over five years, compared to $1,256 for IWM [6]. Portfolio Composition - IWM holds 1,951 stocks, with sector weights led by healthcare (19%), financial services (16%), and technology (16%), maintaining low single-company risk [7]. - MGK is heavily concentrated in technology, with 70% of its assets in this sector, and top holdings like NVIDIA, Apple, and Microsoft making up over a third of its assets [8]. - IWM provides long-standing access to the small-cap segment with a fund age of 25.7 years [7]. Investment Implications - The choice between MGK and IWM depends on the desired exposure to the stock market, with MGK focusing on mega-cap tech growth and IWM offering a diversified small-cap approach [11].