Generated August 15, 2026.
Overview
IWF and VUG are both large-cap U.S. growth ETFs that track different underlying indexes—the Russell 1000 Growth and CRSP US Large Cap Growth, respectively. Both provide broad exposure to profitable, fast-growing companies, but they differ materially in fee structure, fund size, and which specific stocks they hold. The choice between them hinges on cost and index methodology rather than strategy.
How they differ
The biggest distinction is expense ratio: VUG charges 0.04% versus IWF's 0.19%, a nearly five-fold difference that compounds significantly over decades. VUG is also substantially larger at $230B in AUM compared to IWF's $127B, which typically translates to tighter bid-ask spreads and lower trading costs. On yield, VUG edges ahead with a 0.41% distribution rate versus IWF's 0.34%, though both are modest for growth funds. The underlying indexes also diverge—Russell 1000 Growth uses a different methodology than the CRSP large-cap growth benchmark, meaning the funds will hold different stock weightings and occasionally different holdings entirely.
Who each is best for
IWF: Fits investors seeking broad Russell 1000 Growth exposure who already use iShares funds within a larger portfolio or who prefer the index methodology the fund employs.
VUG: Designed for cost-conscious investors building a core U.S. growth allocation and willing to use Vanguard's CRSP index methodology, especially those who prioritize minimizing expenses as a drag on long-term returns.
Key risks to know
- Index composition overlap: Both funds track large-cap U.S. growth equities, but their different indexing methodologies mean some holdings will vary. Verify the overlap in your portfolio if you hold both.
- Growth-stock sensitivity: Both ETFs carry a beta above 1.0 (IWF at 1.2, VUG at 1.26), meaning they amplify broad market swings. Growth stocks tend to fall harder in rising-rate environments and recessions than the overall market.
- Low yield in a rising-rate regime: Distribution rates of 0.34–0.41% offer minimal cushion if dividend yields rise sharply or if growth stocks underperform value. These funds prioritize capital appreciation, not income, so extended periods of weak returns could test patience.
- Concentration in mega-cap tech: U.S. large-cap growth indexes have historically tilted heavily toward technology and a handful of mega-cap names. Verify current top holdings if you're concerned about overlap with other technology or mega-cap exposure.
Bottom line
If you value minimizing costs, VUG's 0.04% expense ratio and $230B in assets stand out; the fee advantage alone saves tens of thousands of dollars over a 30-year holding period for a typical investor. If you're already committed to the Russell 1000 Growth index or use iShares elsewhere, IWF works fine, but the fee differential is real and worth acknowledging. Past performance doesn't predict future results; what matters here is keeping costs low so that your actual market returns stay in your pocket.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.
