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

Overview

Both SPLG and SPY are passively managed ETFs tracking the S&P 500 Index, holding the same 500 large-cap U.S. stocks in identical weights. The difference is structural and operational: SPY, the older and much larger fund, charges a 0.10% expense ratio and carries $783B in assets, while SPLG, a newer addition to State Street's lineup, charges just 0.02% annually and manages $97.3B. This five-fold difference in fees creates a measurable drag on long-term returns despite both funds holding identical underlying exposure.

How they differ

The critical distinction is cost. SPLG's 0.02% expense ratio is one-fifth of SPY's 0.10%, a gap that compounds substantially over decades. On a $100,000 investment held for 25 years, that 0.08% annual difference amounts to roughly $2,000 in cumulative fees assuming modest market returns—capital that stays in the fund rather than flowing to State Street.

SPY commands an enormous scale advantage, with $783B in assets versus SPLG's $97.3B. That liquidity translates to tighter bid-ask spreads in normal trading and greater available volume for large institutional trades, though both funds remain highly liquid.

The distribution rate tilts slightly toward SPLG at 1.18% versus SPY's 1.02%, a modest yield edge likely reflecting minor timing differences in dividend collection or reinvestment schedules. Both pay quarterly, and both funds deliver the same underlying S&P 500 performance before fees.

Who each is best for

SPLG: Fits investors prioritizing ultra-low costs on a core U.S. equity holding and willing to trade marginally smaller trading volume for the fee advantage.

SPY: Fits investors who value maximum liquidity and institutional-grade trading infrastructure, or who already hold other SPDR products and prefer to consolidate within one ecosystem.

Key risks to know

• Identical market exposure: Both funds move in lockstep with the S&P 500, meaning concentration in large-cap U.S. tech and financials (roughly 40% combined) is unavoidable in either choice.

• Fee erosion timing: Although SPLG's lower fee advantage is mathematically clear, SPY's scale may occasionally allow State Street to negotiate slight improvements in fund operations that could narrow the gap; however, the published fee difference is unlikely to shrink materially.

• Tracking error: SPLG's newer inception (2005 vs. 1993) means less long-term performance history, though both track tightly to the index and tracking error should remain negligible.

Bottom line

If you prioritize expense ratios and plan to hold core S&P 500 exposure for the long haul, SPLG's 0.02% fee creates a meaningful cost advantage. If you value the deepest possible liquidity and established track record, SPY's $783B asset base and 31-year history provide unmatched institutional infrastructure. Past performance doesn't predict future results, and the fee gap will be the primary determinant of relative returns over time.