Dollar-Cost Averaging Beats Lump Sums in 2026
The S&P 500 closed April 23 at 7,108 — within 0.4% of the all-time high set the day before. VIX is back to 19.3, down from 25+ in mid-March. The volatility panic that made dollar-cost averaging an easy sell six weeks ago has evaporated. The argument for DCA has not. Shiller's cyclically-adjusted P/E sits at 39.4 — the second-highest reading in 150 years of US market history. Only the dot-com bubble produced a higher number. Every rolling 10-year period that began with CAPE above 35 has delivered real returns below 3% annualised. Vanguard's research says lump-sum investing wins 68% of the time. That 32% losing tail is where April 2026 lives. If you have $50,000 to deploy today, the statistically optimal move is to put it all in the market tomorrow morning. That is also the move that produces the worst outcomes when it produces bad outcomes. DCA is the trade you make when the expected-value math and the survival math disagree — and at CAPE 39, they disagree.