Generated September 19, 2026.
Overview
MGK and QQQ are both large-cap growth ETFs that track different mega-cap equity indexes, but their compositions and volatility profiles differ meaningfully. The key distinction: QQQ's $475B in assets dwarfs MGK's $33.3B, and QQQ's tech-heavy tilt makes it materially more concentrated than MGK's broader mega-cap approach.
How they differ
The biggest difference is sector composition: QQQ's mandate to exclude financials and concentrate in Nasdaq-listed stocks means it skews tech-heavy, while MGK captures growth across the full market, including financial mega-caps. On the yield front, QQQ distributes at 0.45% versus MGK's 0.37%, a small gap that reflects QQQ's modest tech dividend yield advantage; both distribute quarterly. Expense-wise, MGK is leaner at 0.05%, while QQQ costs 0.18%, a 13-basis-point spread that compounds over decades. Beta is nearly identical (MGK 1.28, QQQ 1.26), suggesting similar systematic volatility to the broad market despite their different compositions.
Who each is best for
MGK: Fits investors seeking broad mega-cap growth exposure with minimal expense drag and lower concentration risk across sectors. The lower fee and more balanced sector weighting appeal to buy-and-hold growth allocators indifferent to tech's dominance.
QQQ: Fits investors comfortable with or actively seeking technology and consumer-discretionary tilt, and who value exceptional trading liquidity and a longer track record of tracking the Nasdaq-100 benchmark precisely. Also suits investors who view the expense ratio as trivial relative to the index's performance advantage.
Key risks to know
- Sector concentration: QQQ's tech-heavy Nasdaq-100 composition means a downturn in software, semiconductors, or mega-cap consumer names disproportionately impacts the fund; MGK's broader sector exposure provides some natural hedge.
- Valuation sensitivity: Both funds hold mega-cap growth stocks trading at elevated price-to-earnings multiples; rapid interest-rate rises or earnings disappointments in mega-cap tech pose asymmetric downside risk to both.
- Growth-only tilt: Neither fund includes value or defensive sectors, so extended periods favoring cyclicals, financials, or dividend payers could see both underperform a total-market benchmark.
- Tech-specific regulatory risk (QQQ): QQQ's concentration in mega-cap tech exposes it to antitrust scrutiny, data-privacy legislation, and AI regulation risk that affects a larger slice of the portfolio than it would in MGK. Past performance does not guarantee future results.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.