SPY — State Street SPDR S&P 500 ETF Trust 13F holdings and portfolio analysis

Directly following the baseline exposes an investor to a top-heavy large-cap portfolio that behaves a lot like SPY but with somewhat more single-name concentration. The baseline top 5 are 28.30% and top 10 are 38.83%, led by NVDA 8.01%, AAPL 7.09%, MSFT 6.35%, AMZN 3.96%, and AVGO 2.89%. Sector weights are also dominated by Information Technology at 35.48%, followed by Financials 13.72% and Consumer Discretionary 10.68%. The backtest risk profile stays market-like with beta 0.97 and max drawdown -18.86%, so this is not a low-risk alternative to SPY; it is a slightly more concentrated version of broad U.S. large-cap exposure.

The 2025 period data shows the trade-off clearly: the baseline kept tracking error low, but excess returns were small and inconsistent. It outperformed modestly in 2025-01 (+0.12 excess), 2025-02 (+0.24), 2025-05 (+0.23), and 2025-11 (+0.29), but lagged in 2025-06 (-0.36), 2025-07 (-0.35), 2025-09 (-0.36), and 2025-10 (-0.39). The sharpest drawdown in the full series occurred in early April 2025 when drawdown reached -18.86% on 2025-04-08, while recoveryDays is 54. Those numbers show why the baseline produced strong long-run return but only a modest benchmark edge: it stayed close to market moves almost every month.

A user should inspect concentration, implementation, and benchmark-relative consistency next. The baseline risk notes flag a negative information ratio, top 10 concentration of 38.83%, 18,030 trades, and 100% initial turnover, while totalEstimatedCost is 0.323. Monthly turnover also commonly runs around 2.0 to 3.2 in the turnover series, including 3.18 in 2025-09 and 2.93 in 2025-07. That means the baseline is acceptable only if the user is comfortable with market-like risk, top-heavy tech exposure, and a strategy whose edge over SPY is small enough that trading frictions can matter.