ETF Matchups Highlight Fees, Scale, and Risk

A series of recent fund comparisons highlights how cost, portfolio concentration, and company size shape investor choices across major exchange-traded funds. The articles contrast small-cap growth ETF iShares Russell 2000 Growth (IWO) with large-cap growth peers Vanguard S&P 500 Growth (VOOG) and Vanguard Growth ETF (VUG), and examine emerging markets funds iShares Core MSCI Emerging Markets (IEMG) and iShares MSCI Emerging Markets (EEM).

Across both U.S. and emerging market segments, the data show that lower fees and mega-cap tilts have supported stronger long-term results, while broader diversification and inclusion of smaller stocks offer different risk and sector profiles.

VOOG and IWO both target U.S. growth stocks but with distinct mandates. VOOG tracks large, established S&P 500 growth companies, while IWO holds a wide basket of small-cap growth names. As of March 26, 2026, VOOG had $21.9 billion in assets under management versus $12.2 billion for IWO.

Cost and recent performance differ meaningfully. VOOG’s expense ratio is 0.07% compared with 0.24% for IWO. One-year total returns were similar at 18.62% for VOOG and 19.81% for IWO, but IWO carries higher volatility, with a five-year beta of 1.45 versus 1.12 for VOOG.

Five-year risk and return metrics highlight that contrast. VOOG’s maximum drawdown over five years was -32.74%, while IWO’s reached -42.02%. A hypothetical $1,000 invested five years ago grew to $1,880 in VOOG, compared with $1,127 in IWO, illustrating the stronger cumulative performance of large-cap growth over this period.

Portfolio construction also differs. IWO owns more than 1,100 small-cap growth stocks, led by healthcare at 24% of assets, then industrials and technology. Top holdings Bloom Energy, Fabrinet, and Credo Technology Group each represent only a small share of assets. VOOG holds 140 stocks with a 47% tilt to technology and additional weight in communication services, and its largest positions in Nvidia, Microsoft, and Apple account for a sizable portion of the fund.

The articles note that VOOG’s dominance by mega-cap technology has helped it outperform IWO over the last five years, driven by strong gains from names such as Nvidia. At the same time, nearly half of VOOG’s portfolio in tech and over 30% in its top three holdings contrasts with IWO’s more diffuse exposure, where the top three stocks total less than 5% of assets and technology is about 22%.

In a separate comparison, VUG and IWO are positioned as alternative ways to access U.S. growth. VUG tracks the CRSP US Large Cap Growth Index and is dominated by mega-cap technology, while IWO again represents small-cap growth with broader industry representation. As of March 24, 2026, VUG managed $187.8 billion compared with IWO’s $12.4 billion.

VUG’s fee advantage is pronounced. It charges 0.03% annually versus IWO’s 0.24%, while both funds currently yield 0.5%. Over the past year, IWO posted a 17.2% return, ahead of VUG’s 13.3%, but longer-term results favor VUG: $1,000 invested five years ago would have grown to $1,756 in VUG versus $1,077 in IWO.

Risk metrics are similar on beta, at 1.17 for both, but drawdowns differ. VUG’s five-year maximum drawdown was -35.61% compared with -40.51% for IWO. Sector and holding concentration also diverge. VUG has over half its portfolio in technology, with communication services and consumer cyclicals significant, and its top three holdings—Nvidia, Apple, and Microsoft—make up more than one-third of assets.

IWO, by contrast, spreads assets across more than 1,100 small-cap stocks with healthcare at 24%, technology at 23%, and industrials at 22%. Its top positions in Bloom Energy Class A, Fabrinet, and Credo Technology Group are each a small fraction of the fund, and the strategy has been in place for nearly 26 years with no leverage or structural overlays noted.

The emerging markets comparison between IEMG and EEM centers on cost, coverage, and closely matched performance. Both ETFs seek to track emerging market equities, but IEMG includes small caps and holds 2,725 stocks, whereas EEM focuses on large- and mid-cap names with 1,223 holdings.

As of March 24, 2026, IEMG’s expense ratio stood at 0.09%, less than one-seventh of EEM’s 0.72%. IEMG also offered a higher dividend yield at 2.6%, versus 2.1% for EEM, and had amassed $135.8 billion in assets against EEM’s $25.2 billion.

Recent one-year total returns have been close, with EEM at 26.2% and IEMG at 25.5%. Over five years, both funds showed similar drawdowns and growth: IEMG’s maximum drawdown was -35.94% and EEM’s -37.82%, while a $1,000 investment grew to $1,106 in IEMG and $1,089 in EEM.

Sector exposures are nearly identical. EEM’s largest sectors are technology at 34%, financial services at 19%, and consumer cyclicals at 9%. IEMG’s mix is technology at 32%, financial services at 19%, and consumer cyclicals at 10%. Both lists are led by Taiwan Semiconductor Manufacturing, Samsung Electronics, and Tencent Holdings, with no noted overlays or structural complexities.

The articles underscore that IEMG’s lower fees and higher yield are its primary advantages, while EEM’s main recent edge has been a modestly higher one-year return. Both are presented as viable vehicles for broad emerging market exposure, differing mainly on cost and the inclusion of smaller companies.