VUG vs. IWO: How Mega-Cap Tech Compares to Small-Cap Diversification

Investors seeking to capitalize on growth stocks often choose between established leaders and emerging contenders.

Both the iShares Russell 2000 Growth ETF (NYSEMKT:IWO) and the Vanguard Morningstar Growth ETF (NYSEMKT:VUG) target growth-oriented equities, but they cover different ends of the market-cap spectrum. While VUG tracks established giants, IWO seeks out smaller companies with high potential. Here's how the two stack up on the most important factors.

Snapshot (cost & size)

Beta measures price volatility relative to the S&P 500; beta is calculated from monthly returns over the available fund history (up to five years). The 1-yr return represents total return over the trailing 12 months. Dividend yield is the trailing-12-month distribution yield.

VUG is the more affordable option with a 0.03% expense ratio compared to 0.24% for IWO. This means that for every $10,000 invested, investors can expect to pay $3 per year in fees with VOOG compared to $24 per year with IWO. Over time, that gap can add up significantly.

Performance & risk comparison

What's inside

IWO focuses on small-cap equities, prioritizing firms with higher growth potential. Its largest sector concentrations include healthcare at 30% of assets, followed by technology at 21% and industrials at 14%. It maintains a diversified portfolio of 1,127 stocks, and its largest positions include Twist Bioscience, Moog, and JFrog. Launched in 2000, it has paid $1.69 per share in dividends over the trailing 12 months.

VUG concentrates on large-cap leaders, with a heavy tilt toward technology at 58% of assets, communication services at 15%, and consumer cyclical at 11%. The fund holds 147 stocks, and its largest positions include Nvidia, Apple, and Microsoft. Launched in 2004, this ETF has paid $0.34 per share in dividends over the trailing 12 months.

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Which looks like the better buy

The current market conditions have put ETFs like IWO and VUG in an interesting position.

Typically, small-cap stocks tend to be more volatile yet more lucrative than larger, more established companies. Over the last five years, IWO has experienced a deeper max drawdown and higher beta than VUG, implying more significant short-term price swings.

However, large-cap tech stocks have experienced unprecedented growth over the last few years, driven by demand for AI technology. Because tech stocks account for nearly 60% of VUG's portfolio, this demand has led to outsize returns for VUG, while having less of an impact on IWO.

Going forward, though, that could potentially change. With concerns around an AI bubble swirling, VUG would be hit harder if tech stocks take a turn for the worse.

Over time, these mega-cap giants would very likely recover. But for investors concerned about short-term tech turbulence, VUG is the riskier option right now.

Where IWO shines is in its diversification. While it only holds small-cap stocks, it offers exposure to roughly seven times as many holdings as VUG. Because all of its stocks account for less than 1% of its portfolio, it's also less likely that a single stock will sway performance. For context, VUG's top three holdings collectively make up more than 36% of the fund.

The right choice for you will depend on your goals and risk tolerance. While small-cap stocks can be more volatile in the short term, IWO offers broader diversification with less emphasis on tech. VUG's more targeted focus on tech has led to more lucrative returns recently, but it could be more volatile during a tech sector pullback.

Katie Brockman has positions in Vanguard Morningstar Growth ETF. The Motley Fool has positions in and recommends Apple, Microsoft, Nvidia, Twist Bioscience, and Vanguard Morningstar Growth ETF. The Motley Fool recommends JFrog and Moog. The Motley Fool has a disclosure policy.