ITOT vs SPLG: Which Is the Better Pick in 2026?

Overview

ITOT and SPLG are both ultra-low-cost core U.S. equity ETFs, but they track different benchmarks. ITOT holds the entire S&P Total Market Index (roughly 3,500 stocks across all market caps), while SPLG tracks only the S&P 500 (500 large-cap stocks). The choice between them comes down to whether you want broad diversification or concentrated large-cap exposure.

How they differ

ITOT includes mid-cap and small-cap stocks alongside the S&P 500; SPLG excludes everything outside the top 500. This is the fundamental split. SPLG's narrower focus means it's more concentrated in mega-cap tech and financials, while ITOT spreads risk across the entire investable U.S. market—about 3,000 additional holdings below the 500. On yield, SPLG edges ahead at 1.12% versus ITOT's 1.04%, a modest but real difference for income-focused investors. Both charge rock-bottom expense ratios (SPLG at 0.02%, ITOT at 0.03%), and both are enormous ($97.3 billion for SPLG, $79.6 billion for ITOT). SPLG's beta of exactly 1.0 reflects its pure large-cap benchmark, while ITOT's 1.04 beta shows slightly more volatility tied to smaller-cap inclusion.

Who each is best for

ITOT: Buy-and-hold investors seeking maximum diversification across all U.S. market capitalizations, particularly those with 10+ year horizons who want exposure to mid and small caps without paying active management fees.

SPLG: Core portfolio builders who want simplicity and the tightest tracking of the S&P 500, and who are comfortable with large-cap concentration in exchange for slightly higher yield and marginally lower fees.

Key risks to know

• Concentration in mega-cap tech. SPLG's exclusive focus on the S&P 500 means significantly heavier weighting in the "Magnificent Seven" and financial giants; ITOT dilutes this risk with 3,000 additional holdings.

• Small-cap sensitivity. ITOT's 1,000+ small-cap holdings make it more vulnerable to credit stress and liquidity crunches during market dislocations; SPLG avoids this.

• Yield sustainability at current valuations. Both funds derive yield largely from existing dividends on richly valued large-cap stocks; cuts to S&P 500 dividend payout ratios would pressure both yields downward, though SPLG's 1.12% is higher and thus slightly more sensitive to such cuts.

• Large-cap drawdowns. SPLG has no small-cap buffer; severe large-cap selloffs hit harder than in ITOT.

Bottom line

Both are exceptional core holdings with negligible fees. SPLG wins if you want the S&P 500 pure and simple, plus a fractionally higher yield. ITOT wins if you believe the S&P 500's concentration is excessive and want the full market—including 3,000 mid and small-cap stocks—at a cost of just 0.01% more in fees. Neither is wrong; the pick depends on your conviction about whether the 500 largest U.S. companies adequately represent opportunity, or whether you'd rather own the whole market. Past performance doesn't predict future results.