Should You Buy the Vanguard S&P 500 ETF With the Stock Market at All-Time Highs? History Offers a Clear Answer

The S&P 500 is currently at a record high, boasting a 17% year-to-date gain primarily driven by the Information Technology sector, which constitutes 35.6% of the index and is heavily influenced by AI-related companies like Nvidia, Microsoft, and Apple. While the index's long-term historical performance (10.5% CAGR since 1957) supports sustained investment despite inherent volatility, current elevated valuations suggest a potential period of below-average returns, prompting a strategic approach like dollar-cost averaging for new allocations to index-tracking ETFs such as the Vanguard S&P 500 ETF (VOO).

Analysis

The S&P 500 is at a record high, with a 17% year-to-date gain, significantly exceeding its 10.5% average annual return since 1957. This performance is predominantly driven by the Information Technology sector, 35.6% of the index, led by Nvidia, Microsoft, and Apple.

The AI boom, a key catalyst since January 2023, has made tech's influence crucial to S&P 500 returns. Projections anticipate AI to generate trillions in value, including $4 trillion in data center upgrades by 2030. The Vanguard S&P 500 ETF (VOO) provides diversified, low-cost exposure.

Despite the S&P 500's 10.5% long-term CAGR, the index is "unquestionably expensive," suggesting potential for below-average performance. Volatility, including annual 5% declines and bear markets every six years, is normal, yet the long-term upward trend prevails.

Given elevated valuations, a strategic investment approach is prudent for long-term investors. Dollar-cost averaging into VOO is recommended over a lump-sum investment. This mitigates valuation risk by allowing share acquisition at lower prices during future corrections, optimizing cost basis.

Key Decisions for Investors

• Consider dollar-cost averaging into S&P 500 tracking ETFs like VOO to mitigate risks associated with current elevated valuations, especially for long-term investment horizons.
• Monitor the Information Technology sector's performance and valuations, particularly key AI-driven companies, given their outsized influence on overall index returns and future growth projections.
• Maintain a long-term investment perspective, acknowledging historical market volatility and corrections as normal, while trusting the S&P 500's consistent upward trend over extended periods.