Vanguard VBK vs. Invesco RZG: Divergent Strategies in Small-Cap Growth

The selection of a small-cap growth vehicle often comes down to a choice between broad diversification and concentrated aggression. The Vanguard Small-Cap Growth ETF (VBK) and the Invesco S&P SmallCap 600 Pure Growth ETF (RZG) both target the U.S. small-cap space but employ fundamentally different index strategies. While both funds seek capital appreciation from smaller U.S. firms, VBK prioritizes a wide net and cost efficiency, whereas RZG focuses on a tighter subset of companies with the strongest growth metrics within the S&P SmallCap 600 universe. Cost is a primary differentiator; RZG carries an expense ratio of 0.35%, which is 0.30 percentage points higher than VBK's fee. VBK also provides a slightly higher dividend yield of 0.5% compared to RZG's 0.4%. In terms of portfolio construction, VBK holds 579 stocks, including TechnipFMC (FTI) and Ciena (CIEN), while RZG is more concentrated with 130 holdings, such as Powell Industries (POWL) and Argan (AGX). Sector allocations vary slightly, with VBK leaning more heavily into technology and industrials at 24% each, while RZG is most weighted toward healthcare at 23%. For long-term investors, VBK's lower cost and higher AUM offer better liquidity and risk mitigation. Conversely, RZG is positioned for those seeking potential outperformance through a more aggressive, concentrated growth screen.