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

The S&P 500’s recent surge — up 16% year-to-date and 78% since the start of 2023 — has been driven largely by an outsized information-technology weighting (36.1%) and mega-cap AI leaders such as Nvidia, Microsoft and Apple (combined market cap ~$11.9 trillion); excluding IT, the index’s gain since 2023 falls to 52%. Vanguard’s S&P 500 ETF (VOO) offers a cost-efficient way to gain this exposure with a 0.03% expense ratio, and the index’s long-term track record remains strong (10.5% CAGR since 1957), but investors should balance AI and potential Fed easing tailwinds against historically elevated valuations and routine drawdowns (≥5% annually on average, ≥10% every ~2.5 years, and bear markets roughly every six years); a phased, dollar-cost-averaging entry is suggested to mitigate near-term correction risk.

Analysis

The S&P 500 has outpaced historical norms, rising 16% year-to-date and 78% since the start of 2023, with information technology accounting for 36.1% of the index; mega-cap AI names Nvidia, Microsoft and Apple alone have a combined market capitalization of roughly $11.9 trillion and materially amplified returns (excluding IT, the index’s gain since 2023 falls to 52%). Vanguard’s S&P 500 ETF (VOO) provides a direct, ultra-low-cost (0.03% expense ratio) way to capture this exposure across 11 sectors, while the financials (12.9%), consumer discretionary (10.5%) and communication services (10.1%) weights provide additional breadth beyond tech.

The long-term record remains strong — a 10.5% compound annual return since 1957 — but volatility is routine: Capital Group data cited average annual declines of at least 5%, 10% drops about every 2.5 years, and bear markets roughly every six years, with the last bear in 2022. The article flags historically elevated valuations that increase near-term correction risk even as AI-driven revenue upside and gradual Fed rate easing are cited as tailwinds.

Given these dynamics, the practical implication is that VOO is appropriate for core market exposure but investors should manage concentration and sequencing risk through phased entries or active position sizing rather than lump-sum allocation at all-time highs.

Key Decisions for Investors

• Use VOO as a low-cost core holding (0.03% expense ratio) to capture S&P 500 exposure while avoiding stock-picking concentration, start with a smaller initial allocation and add consistently over time to lower sequencing risk
• Monitor and limit active overweight to the information-technology complex given its 36.1% index weight and the $11.9 trillion combined market cap of NVDA, MSFT and AAPL, because index performance is currently highly concentrated
• Maintain hedges or a cash buffer and set position-sizing rules because valuations are elevated and historical drawdowns (>=5% annually, >=10% every ~2.5 years) increase near-term correction risk
• If seeking higher returns, pursue selective, high-conviction positions in AI leaders outside of the core ETF but accept increased concentration risk and ensure these positions are sized modestly relative to the core VOO allocation