SPY: SPDR S&P 500 ETF Trust

SPY is the SPDR S&P 500 ETF Trust, the original US-listed ETF, launched in January 1993 by State Street. It tracks the S&P 500 index and is still the most-traded equity ETF in the world by daily volume, even though Vanguard's VOO has overtaken it on assets under management.

SPY, listed on NYSE Arca. The official name is SPDR S&P 500 ETF Trust, issued by State Street Global Advisors. The 'SPDR' part is pronounced 'spider' and stands for Standard & Poor's Depositary Receipts.

Both track the S&P 500 so returns are nearly identical before fees. VOO costs 0.03% per year; SPY costs 0.0945%. Over 30 years on a $100K position, that 0.0645% gap compounds to ~$8K in foregone returns. SPY's edge is options liquidity: tightest spreads, deepest order book, by far the most-traded options. For long-term holders, VOO. For options strategies or active trading, SPY.

All ~503 companies in the S&P 500, weighted by market capitalization. Top 10 (Microsoft, Apple, NVIDIA, Amazon, Meta, Alphabet, Broadcom, Berkshire Hathaway, Tesla) account for ~35% of the fund. The remaining ~493 holdings make up the other ~65%, with weights decreasing roughly logarithmically.

0.0945% per year (9.45 basis points). On a $10,000 investment, that's $9.45/year in fees, deducted from the fund's NAV. Higher than VOO and IVV (both 0.03%) because SPY's legal structure as a unit investment trust restricts how it can use securities lending and other fee-offset mechanisms.

Approximately 1.3% as of early 2026, paid quarterly. Yield drifts with the underlying S&P 500 constituents and with how those constituents' dividend policies change. Distributions are aggregated from the underlying holdings and paid through to SPY holders on a quarterly schedule.

SPY trades like any stock during US market hours. Buy it through any broker: Robinhood, Fidelity, Schwab, Public, M1, Vanguard, or any other. Fractional shares are supported at most modern brokers. If you want to build a portfolio with SPY as a core position plus thematic baskets, connect your broker to Walnut and the AI can help structure the satellites.

Approximately $600 billion as of early 2026. SPY was the largest ETF in the world by AUM until late 2024, when VOO overtook it. SPY's daily trading volume is still the largest among ETFs by a wide margin, even though VOO holds more assets.

SPY captures the S&P 500 at a higher cost than VOO or IVV. For long-term holders, the cheaper alternatives are usually the better pick. For active traders or anyone running options strategies, SPY's liquidity is unmatched. Walnut isn't an investment adviser; whether SPY fits your portfolio depends on your time horizon, what else you own, and how you plan to use it.

January 22, 1993. SPY was the first US-listed ETF and pioneered the structure that's now standard. The fund's success seeded the entire US ETF industry; today there are over 3,000 US-listed ETFs holding combined assets above $10 trillion.

SPY is organized as a unit investment trust (UIT), which restricts how the fund can use securities lending revenue and other mechanisms that newer ETF structures (Open-End Funds and Regulated Investment Companies) use to offset fees. The legal structure was set when SPY was created in 1993 and changing it is impractical. VOO and IVV are open-end funds and have more flexibility.

Yes, quarterly. Trailing yield is approximately 1.3% annually as of early 2026. Dividends are aggregated from the underlying S&P 500 constituents and paid through to SPY holders. Most brokers offer dividend reinvestment (DRIP) for SPY at no extra cost.

Yes, at brokers that support fractional ETF purchases: Robinhood, Fidelity, Schwab, Public, M1, and several others. Vanguard's brokerage supports fractional ETF purchases for its own funds but historically restricted fractional for third-party ETFs like SPY.

SPY holds the S&P 500 (~500 large-cap US companies). VTI (Vanguard Total Stock Market) holds the entire US investable equity universe (~3,700 companies including mid and small caps). VTI is broader and cheaper (0.03% vs 0.0945%). Top holdings of both are nearly identical because cap weighting dominates; VTI's diversification comes from the smaller-cap tail.