Generated August 8, 2026.
Overview
FXAIX is a mutual fund that tracks the S&P 500, giving you exposure to 500 of the largest U.S. companies weighted by market cap. QQQ is an ETF that tracks the Nasdaq-100, capturing 100 of the largest non-financial stocks on the Nasdaq exchange. The key difference: FXAIX is broad market exposure with a 1.0 beta; QQQ is concentrated in tech and growth stocks with a 1.24 beta, meaning it amplifies both gains and losses relative to the broader market.
How they differ
The biggest distinction is composition. FXAIX holds the full S&P 500 across all sectors—financials, industrials, consumer goods, healthcare—while QQQ excludes financial companies and concentrates on Nasdaq-listed large-caps, which skews heavily toward technology and growth. QQQ's 1.24 beta tells the story: it swings harder than the overall market in both directions.
Fees and yield differ too. QQQ costs 0.18% annually versus FXAIX's 0.49%, a meaningful gap for long-term holders. FXAIX yields 1.03%, more than double QQQ's 0.44%, reflecting the S&P 500's inclusion of higher-dividend sectors like utilities and financials. Both distribute quarterly. QQQ has $479B in AUM and uses an ETF structure; FXAIX is a mutual fund with $833B in assets and has been operating since 1988, predating QQQ by over a decade.
Who each is best for
FXAIX: Fits investors seeking broad U.S. equity exposure with lower turnover expectations and a preference for mutual fund mechanics, particularly those who value lower-volatility, diversified sector participation.
QQQ: Designed for investors comfortable with concentration in technology and growth stocks and willing to accept higher volatility in exchange for exposure to companies that have driven market gains in recent years.
Key risks to know
- Concentration in technology and growth. QQQ's Nasdaq-100 composition means meaningful exposure to a narrower set of sectors compared to FXAIX's S&P 500 breadth. If tech underperforms or faces regulatory headwinds, QQQ will likely lag more sharply.
- Higher volatility and drawdown severity. QQQ's 1.24 beta means declines tend to be steeper. During market corrections, the amplified downside can be material for investors with shorter time horizons or lower risk tolerance.
- Sector overlap and correlated holdings. Both funds own many of the same mega-cap technology stocks (e.g., Apple, Microsoft, Nvidia). Holdings concentration varies, but overlap is significant; verify your total exposure if holding both.
- Distribution yield differences. FXAIX's higher yield reflects diversification across dividend-paying sectors; QQQ's lower yield reflects growth-stock positioning with less emphasis on income. Reinvestment patterns and tax treatment will differ accordingly.
Bottom line
If you want broad market exposure with lower volatility and higher dividend income, FXAIX's S&P 500 tracking stands out; if you're willing to concentrate on growth and tech and can tolerate swings, QQQ's lower fee and Nasdaq-100 exposure may appeal. Both are low-cost index vehicles with decades of track records. Past performance doesn't predict future results.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.