Generated October 3, 2026.
Overview
These four ETFs all track broad U.S. stock market indexes and charge the same 0.03% expense ratio, making them functionally identical on cost. The key distinction is breadth: VOO captures the 500 largest U.S. companies via the S&P 500, while ITOT, SCHB, and VTI extend into midcaps and smaller stocks through total-market indexes. Among the total-market trio, AUM and inception history differ, but their underlying indexes are nearly identical in composition and turnover.
How they differ
VOO is a large-cap fund, holding only the 500 largest companies, while ITOT, SCHB, and VTI own the full breadth of U.S. equities down to microcaps. Within the total-market group, VTI is the largest by far at $700B, ITOT follows at $96.9B, and SCHB is smallest at $44.9B. All four charge 0.03%, so cost is not a differentiator. Yields are nearly flat across the four—ranging from 1.03% to 1.09%—reflecting their shared exposure to large-cap dividend payers and the fact that smaller stocks in the total-market indexes contribute minimal income. VOO's beta of 1.0 is slightly lower than the total-market funds, which typically run 1.03 to 1.0379 because mid and small-cap volatility lifts the group average.
Who each is best for
VOO: Fits investors who want pure large-cap U.S. equity exposure and prefer to sidestep the added volatility and lower liquidity of mid and small-cap holdings.
ITOT: Designed for total-market exposure at a lower cost than many actively managed alternatives and suits investors seeking the oldest continuously tracked total-market index among these four, with inception in 2004.
SCHB: Matches investors who have existing Schwab custody relationships and value the convenience of a Schwab-managed total-market fund with comparable fees and broad-market reach.
Key risks to know
- Large-cap concentration in total-market funds. Even though ITOT, SCHB, and VTI own the full market, the top 10 holdings represent roughly 30% of each fund's weight, so performance is heavily driven by mega-cap tech and finance stocks regardless of which total-market vehicle you choose.
- Small- and mid-cap drag during market leadership rotations. When large caps outperform (as they have in recent years), total-market funds lag pure large-cap funds like VOO; conversely, when smaller stocks lead, total-market funds may pull ahead. This timing risk is inherent to the choice between large-cap and total-market.
- Index tracking differences. ITOT, SCHB, and VTI track subtly different indexes (S&P Total Market, Dow Jones US Broad Market, and Morningstar US Total Market, respectively). Overlap is very high, but performance can diverge by basis points during market dislocations or index reconstitution.
Bottom line
All four charge 0.03%, so the decision hinges on whether you want pure large-cap (VOO) or total-market (the other three). If you want the broadest market exposure, VTI's $700B in assets and earliest inception make it the most established option; ITOT and SCHB offer the same broad reach at smaller scale. VOO wins if large-cap simplicity is your goal and you're comfortable ceding mid- and small-cap upside. Past performance does not predict future results.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.