This Underrated Investment Has Built More Wealth Than Most Investors Realize -- and History Says Now Is a Smart Time to Buy

The Vanguard S&P 500 ETF delivered a 323% total return over the past decade, turning $10,000 into more than $42,000 as of Sept. 14, equivalent to a 15% annualized return. The article advocates remaining invested and using dollar-cost averaging, citing BNY Mellon research showing average returns of 9.7% in the year after investing at market highs and 8.6% annualized over the following five years. A hypothetical $10,000 initial investment plus $100 monthly contributions reaches nearly $382,000 after 30 years at a 10% assumed annual return, versus $175,500 without subsequent contributions.

Analysis

This is primarily retail-flow reinforcement rather than new fundamental information. Persistent automatic allocations favor the highest-index-weight, highest-liquidity constituents—especially NVDA—creating a mechanical support bid that can extend momentum and suppress index volatility, but also raises concentration risk: incremental VOO demand is not distributed according to forward earnings quality. The near-term implication is modestly positive for mega-cap beta; it is not, by itself, a catalyst for NFLX or NVDA-specific earnings revisions.

The more relevant second-order issue is valuation reflexivity. If passive inflows remain firm while active managers remain benchmark-constrained, index leaders can sustain premium multiples despite narrowing breadth; this rewards long SPY/VOO exposure over equal-weight RSP for days to a few months. Over 6-18 months, however, the same flow structure makes the index more vulnerable to a single AI-capex, rates, or earnings disappointment because de-risking would concentrate in the same crowded leaders.

BRK.A is a partial beneficiary of renewed household equity participation through its large listed-equity portfolio and insurance float economics, but it is not a clean passive-flow proxy. BNY has more direct long-run optionality through asset-servicing and custody balances if recurring retail contributions expand industry assets, although fee-rate competition limits near-term earnings sensitivity. The contrarian view is that enthusiasm around buying at highs conflates historical average outcomes with current starting valuations; the relevant forward-return determinant remains earnings delivery relative to elevated mega-cap expectations, not the calendar entry point.

Key Decisions for Investors

• No standalone directional trade on the article; treat it as a low-impact confirmation of retail/passive-flow support rather than an investable company-specific catalyst.
• For a 1-3 month tactical expression, maintain long SPY versus RSP only while NVDA and other top-weight constituents continue to deliver upward earnings revisions; target 3-5% relative upside, with a stop if SPY/RSP breaks below its 50-day moving average or breadth improves materially.
• Use any flow-driven NVDA strength to avoid adding unhedged exposure ahead of AI spending read-throughs; pair incremental NVDA longs with QQQ puts or a short RSP basket. Falsification for the cautious view: sustained hyperscaler capex-guide increases and further NVDA revenue estimate revisions higher.
• Place BNY on a 6-18 month watchlist as an asset-servicing beneficiary, not an immediate buy. Upgrade only if reported assets under custody/administration and investment-services fee growth accelerate without offsetting net interest income pressure.