SPY vs EDV: The Flaws of a Fixed 60-40 Allocation

Friday, Aug 1, 2025 4:49 pm ET2min read

This article discusses the SPDR S&P 500 ETF Trust (SPY) and the iShares Core U.S. Aggregate Bond ETF (EDV). It argues that a fixed allocation of 60% stocks and 40% bonds, commonly used in retirement portfolios, may not be optimal. The article suggests that investors should consider their individual circumstances and risk tolerance when deciding on an asset allocation.

In the realm of retirement portfolios, the 60/40 stock-bond allocation has long been a staple. However, recent market conditions and individual investor circumstances may warrant a reevaluation of this traditional approach. This article explores the SPDR S&P 500 ETF Trust (SPY) and the iShares Core U.S. Aggregate Bond ETF (EDV), and discusses why a fixed allocation might not always be optimal.

The SPDR S&P 500 ETF Trust (SPY) is a widely followed benchmark for the U.S. stock market. It provides exposure to the large-cap stocks of the S&P 500 Index. The iShares Core U.S. Aggregate Bond ETF (EDV), on the other hand, tracks the Bloomberg Barclays U.S. Aggregate Bond Index, offering exposure to a broad range of investment-grade bonds.

The 60/40 portfolio, with its fixed allocation to stocks and bonds, has been a popular choice due to its simplicity and the historical performance of these asset classes. However, recent market dynamics and individual investor profiles may necessitate a more nuanced approach. For instance, a younger investor with a longer time horizon might benefit from a higher allocation to equities, given the potential for higher returns. Conversely, an investor nearing retirement might prefer a more conservative allocation to preserve capital and generate income [2].

Moreover, the performance of different asset classes can vary significantly over time. For example, U.S. Small Cap Equities have outperformed other equity asset classes since the April 8 low, suggesting that they could be an attractive addition to a portfolio [3]. Similarly, the U.S. corporate and government debt securities dominate developed markets credit, ensuring a healthy demand for U.S. debt and supporting the continued relevance of the U.S. dollar [3].

Investors should also consider their risk tolerance and individual circumstances when deciding on an asset allocation. A diversified portfolio that includes a mix of asset classes, such as equities, bonds, and real assets like commodities, can help manage risk and potentially enhance returns. For instance, copper tariffs set to take effect in August may attract diversification and potential risk-hedging benefits [3].

In conclusion, while the 60/40 stock-bond portfolio has been a reliable strategy, investors should consider their individual circumstances and risk tolerance when deciding on an asset allocation. The SPDR S&P 500 ETF Trust (SPY) and the iShares Core U.S. Aggregate Bond ETF (EDV) offer exposure to the U.S. stock market and investment-grade bonds, respectively, but they are just two components of a well-diversified portfolio.

References:
[1] https://finance.yahoo.com/video/etf-comparison-spdr-p-500-183000508.html
[2] https://etftrends.com/etf-investing-channel/building-diversified-portfolio-fidelity-etfs-step-step-guide/
[3] https://www.wellsfargoadvisors.com/research-analysis/strategy/weekly.htm

SPY vs EDV: The Flaws of a Fixed 60-40 Allocation

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