Which S&P 500 ETF Is Better in 2026? State Street's SPY or iShares' IVV?

iShares Core S&P 500 ETF (IVV) is positioned as a better pick versus SPDR S&P 500 ETF (SPY) primarily due to a much lower expense ratio (0.03% vs 0.0945%) and a marginally higher trailing-12-month dividend yield (1.1% vs 1.0%). Both funds track the same S&P 500 benchmark with identical 5-year max drawdown (-24.5%) and virtually the same performance (e.g., 3-year: 22.29% IVV vs 22.2% SPY; 5-year: 20.58% vs 20.48%). Despite similar holdings (503 each, tech weight 39%), SPY’s higher fees are cited as the reason it underperforms slightly across multiple time frames.

Analysis

This is not a fundamental signal for AAPL/MSFT/NVDA; it is a wrapper-selection decision that mainly redistributes fee revenue and asset-gathering power. The economic winner is the lower-cost platform: over time, even a single-digit basis point fee gap compounds into a meaningful retention advantage for large, sticky core allocations, especially in retirement and model-portfolio channels where implementation teams optimize for total expense ratio rather than brand.

For STT, the risk is less about immediate AUM loss and more about margin pressure in the ETF servicing/franchise mix if passive flows increasingly prefer the cheaper vehicle. SPY still owns an important liquidity and options ecosystem, so the displacement is likely slow and incomplete rather than binary. That means the damage to SPDR is a months-to-years bleed, not a day-one shock, unless advisors/professional allocators explicitly replatform core exposures en masse.

The contrarian miss is that the cheapest fund is not always the best executable fund. SPY’s embedded derivatives market, intraday depth, and balance-sheet utility still justify a liquidity premium for hedgers and tactical traders, which caps how far share loss can go. The real second-order effect is on the broader low-cost ETF complex: if core index investors continue trading down the fee curve, competitors with scale and distribution advantages can win share without needing better underlying performance, while everyone else is forced into a race to the bottom.

Key Decisions for Investors

• Rotate new long-only S&P 500 core allocations from SPY into IVV over the next 1-4 weeks; expected edge is small in absolute terms but durable, with the thesis hinging on fee drag compounding over 12+ months.
• Use a low-conviction pair trade only for existing benchmark exposure: long IVV / short SPY in equal dollar size, sized modestly, to harvest the fee differential; exit if SPY widens its liquidity premium or if options/market-maker demand reasserts itself.
• Keep STT on watch as a slow-burn loser rather than an immediate short: the catalyst path is flow migration over quarters, so the trade works only if passive inflows continue to favor lower-fee wrappers and STT does not offset with pricing or franchise gains.
• Do not change underlying megacap exposure on this headline; AAPL, MSFT, and NVDA are effectively unaffected operationally. If you need S&P beta, buy the wrapper with the lowest all-in ownership cost, not the stock basket.
• Falsifier/alert: if SPY materially narrows the fee gap, or if its liquidity premium expands enough to offset the cost difference for institutional users, the relative-value case for IVV weakens and the trade should be closed.