The Hidden Tech Concentration Within a Global ETF

A surprising trend is emerging within broad-market international funds: significant exposure to a handful of mega-cap technology stocks. The iShares MSCI World ETF (URTH) exemplifies this phenomenon, where the collective weight of just three companies—NVIDIA, Microsoft, and Apple—exceeds 14% of the entire portfolio. This substantial concentration presents a dual narrative of potent opportunity alongside inherent sector-specific risk.

Recent performance figures underscore the benefits of this tilt. Year-to-date, the fund has delivered an impressive 13.51% return, outpacing numerous international competitors. Its 12-month performance through July 2025 reached 16.50%, a figure that narrowly surpassed its benchmark, the MSCI World index, which returned 16.26%. The fund’s longer-term track record remains strong, with three-year annualized returns of 18.46% and five-year annualized gains averaging 14.73%. This momentum is further evidenced by its current trading price hovering just below its 52-week high.

Should investors sell immediately? Or is it worth buying MSCI World ETF?

A deeper look into the fund’s composition reveals the source of this performance. The top ten holdings collectively account for a substantial 26.2% of its total assets. Leading the pack is NVIDIA with a 5.42% weighting, followed by Microsoft at 4.56% and Apple at 4.43%. These three firms have been primary drivers of the fund’s gains in the current AI-fueled market environment. They are joined by other tech giants, including Amazon (2.79%) and Meta Platforms (2.05%), creating a distinctly technology-heavy profile. While this allocation accurately mirrors the market capitalization of the world’s largest companies, it also increases the ETF’s vulnerability to a potential downturn or rotation away from the technology sector. This US-centric tech reliance is also reflected in the fund’s geographic allocation, where American equities command a dominant share despite its global mandate.

Beyond its holdings, the ETF is structured for efficiency. It boasts high liquidity with approximately 325,000 shares traded daily and maintains tight bid-ask spreads. Its expense ratio is positioned competitively within the global equity ETF space. The central question for investors is whether this pronounced tech weighting will continue to serve as a durable engine for growth or eventually transform into a liability during a market shift.