It is one of the most common investing instincts: an investor comes into a lump sum of money, looks at the market, feels uneasy about current prices, and decides to wait for a pullback before putting the money to work. On the surface, the logic sounds sensible. Why invest today if stocks might be cheaper next month? The problem is that this strategy requires getting two decisions right: when to stay out and when to get back in. In the real world, that is far harder than it sounds, and more often than not the cost of waiting is missed growth.
Why Waiting Can Be So Expensive
The core issue is simple: markets have historically risen more often than they have fallen. That means money invested sooner has usually had a better chance to participate in growth, dividends, and compounding. Money held in cash while waiting for a better entry point may feel safer, but it comes with an opportunity cost. If the expected decline never arrives, or if it arrives only after the market has already moved significantly higher, the investor may end up buying in at a higher level anyway—or staying on the sidelines even longer.
What the Data Shows
Research from Vanguard found that, across historical and simulated market data, investing a lump sum immediately outperformed spreading money into the market over time roughly two-thirds of the time. In its 2023 analysis covering 1976–2022, Vanguard noted that U.S. stocks outperformed cash 76% of the time and bonds outperformed cash 68% of the time. In other words, delaying investment often means deliberately choosing a lower-returning asset while waiting for a moment that may never come.
J.P. Morgan Asset Management has shown how costly even brief mistiming can be. According to its 20-year analysis, a hypothetical $10,000 investment in the S&P 500 from January 3, 2005, through December 31, 2024, grew to about $71,750 if left fully invested, producing a 10.4% annualized return. Miss just the 10 best market days, however, and the ending value falls to about $32,871, with the annualized return dropping to 6.1%. Miss the best 60 days, and the ending value falls below the original investment, to about $4,712. That is a powerful illustration of how a handful of strong rebound days can drive a large share of long-term returns.
What makes this even harder for would-be market timers is that the market’s best days often arrive when fear is highest. J.P. Morgan’s research found that 7 of the 10 best days over the past 20 years occurred within two weeks of the 10 worst days. In practice, that means investors who sell or wait for “more clarity” during periods of turmoil are often absent precisely when the rebound begins.
Real-World Moments When Investors Feel Tempted to Wait
The 2008 financial crisis. This was one of the most understandable moments to wait for a “better” entry point. Markets were falling sharply, major financial institutions were failing, and bad news kept getting worse. Many investors assumed it would be prudent to hold cash until the dust settled. But periods like late 2008 and early 2009 also contained some of the market’s strongest single-day rebounds. Investors waiting for confidence to return often found that the market had already moved substantially higher before they felt comfortable buying.
The COVID-19 crash in 2020. In March 2020, the market plunged as the world confronted lockdowns, economic shutdowns, and enormous uncertainty. For many investors, waiting felt rational. Yet the recovery began before the economic news improved. Morningstar noted that the March 2020 bear market recovered in just four months, making it the fastest recovery among major market crashes over the past 150 years. Investors who waited for the headlines to feel reassuring likely missed a large part of the rebound.
The 2022 bear market and 2025 volatility. Rising inflation, aggressive Federal Reserve tightening, recession fears, war-related uncertainty, and tariff headlines all gave investors reasons to hold off. In hindsight, these are exactly the kinds of environments that make timing feel intelligent and disciplined. But that feeling can be deceptive. As 2025 showed, markets can approach bear-market territory, reverse quickly, and still finish at or near new highs. Waiting for the “obvious” all-clear signal often means the market has already repriced upward.
Why This Happens Over and Over
Behavioral finance helps explain why investors fall into this pattern. Waiting to invest can feel prudent because it appears to reduce the risk of immediate regret. If someone invests a large sum today and the market drops tomorrow, the pain feels personal and immediate. So the investor waits for a dip. But once the dip comes, fear usually increases rather than disappears. Then the investor waits for more confirmation, more stability, or even lower prices. The result is often paralysis: cash sits idle while the market recovers without them.
A Better Way to Think About a Lump Sum
None of this means markets never decline after a new investment. They absolutely can, and sometimes do. But the evidence suggests that for long-term investors, waiting for the perfect entry point is usually more damaging than investing and accepting short-term uncertainty. A disciplined plan is generally more effective than a prediction. For investors who feel uneasy about deploying a large amount all at once, a structured investment schedule may help behaviorally—but it should be understood as a compromise for comfort, not a reliable return-enhancing strategy.
The lesson is not that investors should ignore risk. It is that trying to wait for the “right” moment to invest a lump sum often substitutes emotion for discipline. Markets tend to rise over time, and some of their strongest gains occur when investors feel the least comfortable. That is why staying focused on long-term goals—and getting money to work rather than waiting endlessly for a lower price—has historically been the better bet.
