Don’t Let A Market Timer Gamble with Your Life Savings

The past 12 months have taught us many lessons and reinforced a few timeless principles, one of which is the difficulty of making accurate forecasts. The headlines below should serve as a reminder of the importance of following an investment approach based on discipline and diversification rather than prediction and timing:

“Dow Closes at Record as Worries Abate”

“Oil Prices Collapse After Saudi Pledge to Boost Output”

“Coronavirus Declared Pandemic by World Health Organization”

“Dow Soars More Than 11% In Biggest One-Day Jump Since 1933”

“Record Rise in Unemployment Claims Halts Historic Run of Job Growth”

“US Stocks Turn in Worst Quarter Since 2008”

“US Stocks Close Out Best Quarter Since 1998”

“US Debt Hits Postwar Record”

What Is Market Timing?

Market timing refers to the attempt to predict future movements in the financial markets and adjust investments accordingly—buying at what one hopes will be low points and selling before presumed declines. This strategy is essentially about trying to outwit the market by making tactical decisions about when to enter or exit various investments based on anticipated changes.

Those who practice market timing often rely on a mix of economic indicators, technical charts, news events, and even gut instincts. Whether it’s shifting from stocks to bonds on a hunch, or moving entirely to cash during turbulent times, market timing is about making moves in pursuit of an edge.

However, history—and a host of seasoned investors—suggests this is much easier said than done. Predicting market swings with any consistent accuracy has proven to be a daunting, if not impossible, endeavor. Rarely do even professional money managers manage to call both the peaks and valleys correctly over the long haul.

Instead, many experts advocate for a disciplined approach that emphasizes diversification and a long-term perspective. By doing so, investors sidestep the pitfalls of prediction and participate fully in markets that, over time, reward patience rather than perfect timing.

Who Said “Time in the Market, Not Timing the Market”?

The well-known phrase, “Time in the market, not timing the market,” is often credited to Keith Banks, Vice Chairman at Bank of America, who emphasized its importance during his appearance on CNBC’s “Squawk Box” in March 2020. This simple yet powerful idea sums up why focusing on long-term participation, rather than trying to predict market moves, tends to deliver better results for most investors.

The global financial markets process millions of trades worth hundreds of billions of dollars each day. These trades reflect the viewpoints of buyers and sellers who are voluntarily transacting at current prices and putting their capital to work. Using these trades as inputs, the market functions as a powerful information-processing mechanism, aggregating vast amounts of information into prices and driving them toward fair value. Investors who attempt to outguess prices are pitting their knowledge against the collective wisdom of all market participants.

How Does Market Timing Work?

Market timing is the practice of trying to predict when prices in the market will rise or fall—and then making investment moves based on those predictions. This typically involves shifting funds in and out of markets, or moving money between asset classes, with the goal of capturing gains or avoiding losses.

Practitioners of market timing rely on various forecasting tools. These might include studying company financials, analyzing historical price charts, weighing economic data, or even relying on their intuition. The intent is always the same: to buy before prices rise and sell before prices fall.

On paper, it might sound simple: if you can spot the peaks and valleys before everyone else, you could potentially enhance your returns. Some professional traders and portfolio managers devote considerable resources to this strategy, using sophisticated models and real-time data. In reality, though, consistently getting these decisions right is an incredibly tall order—even for seasoned experts.

Contrast this with a buy-and-hold approach, where investors pick a diversified portfolio and stick with it through ups and downs. Although some amount of timing is inevitable as life circumstances change, the key difference is intent. Market timers deliberately aim to outmaneuver the market, while buy-and-hold investors accept the market’s wisdom (and volatility) as it comes.

How Accurate Does a Market Timer Need to Be?

To put the challenge of market timing in perspective, consider classic research by Nobel laureate William Sharpe published in the Financial Analysts Journal. His findings reveal just how steep the odds are: in order to simply match the performance of a passively managed index fund over time, a market timer needs to call market moves correctly roughly three out of every four times—an accuracy rate of about 74%.

That’s a remarkably high bar, especially when you consider all the variables, emotions, and noise surrounding day-to-day market activity. For most investors, consistently meeting this threshold is extremely unlikely, making disciplined, broadly diversified investing a more reliable approach over the long run. If markets were not effectively incorporating information into securities prices, then opportunities would arise for professional managers to identify stocks/sectors that are “mispriced” and take advantage of those dislocations before being “corrected”. However, the prediction game may be a losing one for many investors, and each year there are published reports that highlight the difficulties conventional managers face.

Dimensional’s 2020 Mutual Fund Landscape report evaluated 4,279 US-based mutual funds, which account for more than $10.9 trillion, to assess the performance of managers rel…

If markets were not effectively incorporating information into securities prices, then opportunities would arise for professional managers to identify stocks/sectors that are “mispriced” and take advantage of those dislocations before being “corrected”. However, the prediction game may be a losing one for many investors, and each year there are published reports that highlight the difficulties conventional managers face.

Missing Out on Market Gains

Stepping out of the market, even for a short time, can carry a cost that’s easy to overlook. The reality is, some of the strongest market gains tend to occur in short bursts—and often when investors feel most uneasy. Missing just a handful of the best-performing days can make a significant dent in long-term returns.

The challenge lies in timing: it’s nearly impossible to know in advance when these exceptional periods will happen. By the time good news is clear and confidence returns, markets may have already rebounded. Investors who exit during turbulent times and wait on the sidelines may miss the very surges that drive long-term growth. This underscores why maintaining discipline—by staying invested through ups and downs—can be so powerful for compounding wealth over time.

The Cost of Missing the Market’s Best Days

History has shown that remaining invested through market ups and downs can be far more rewarding than trying to time entrances and exits. It’s easy to think that stepping out during turbulent periods will spare losses, but missing even a handful of the market’s strongest days can dramatically erode long-term returns.

Consider this: research from independent firms like Dalbar has demonstrated that an investor who stayed fully invested in the S&P 500 over two decades not only weathered storms but reaped the full benefit of the market’s growth. However, if that same investor happened to be on the sidelines during just ten of the market’s top-performing days in that period, their annualized return was essentially cut in half. Many of these best days occurred amid intense volatility—precisely when headlines and emotions made staying put most challenging.

This pattern highlights a critical point: the largest rebounds often follow sharp drops, and the temptation to exit during downturns can leave investors stranded when recoveries happen unexpectedly. The penalty for missing out on just a few of these pivotal days reinforces why a disciplined, long-term approach can be so vital for investment success.

The Role of Emotions in Market Timing

Emotions can be powerful drivers of investor behavior, often to the detriment of long-term results. When markets are surging and headlines are optimistic, fear of missing out can prompt individuals to pile in at elevated prices, following the crowd rather than sound reasoning. Conversely, unsettling news or sudden downturns might spark panic, leading to rushed selling even if broader trends or fundamentals haven’t shifted.

This tendency to react emotionally—buying high amid euphoria and selling low during bouts of anxiety—creates a significant hurdle for those attempting to outmaneuver the market. Over time, these reactionary decisions can erode performance, making it exceptionally difficult to consistently capture gains through timing moves in and out of different investments.

What Independent Studies Say About Market Timing

A wide array of independent research consistently underscores the pitfalls of trying to time the market. For example, a well-known report from Dalbar highlights that investors who jump in and out of the market in response to short-term swings often miss some of the best days for returns—days that tend to occur amid volatility, right when many are most tempted to exit. Missing just a handful of these critical days can slash long-term returns to a fraction of what a disciplined investor might achieve by simply staying invested.

The Center for Retirement Research at Boston College has also examined market timing within popular investment vehicles like target-date funds. Their findings revealed that attempts to shift allocations based on market predictions frequently led to lower long-term returns compared to funds that maintained steady allocations.

Further reinforcing these conclusions, Morningstar’s extensive analysis of fund performance found that a minority of actively managed funds outperformed their passive counterparts over a decade or more. The picture was especially stark among U.S. Large-cap funds, where very few active managers were able to beat their benchmarks after costs, let alone achieve this feat consistently.

In sum, the evidence from third-party organizations paints a clear picture: most investors fare better by resisting the urge to predict market movements and instead focusing on a steady, disciplined investment approach. Dimensional’s 2020 Mutual Fund Landscape report evaluated 4,279 US-based mutual funds, which account for more than $10.9 trillion, to assess the performance of managers relative to benchmarks.1 Across thousands of funds covering a broad range of manager philosophies, objectives, and styles, a majority of the funds evaluated did not outperform benchmarks after costs. According to the report, for the 20-year period through 2020, 19% of equity funds and 11% of fixed income funds survived and outperformed their benchmarks.

While there are a select number of fund managers that outperform, someti…

Approaches to Market Timing

Investors and managers employ a range of approaches as they attempt to anticipate the next move in the markets. These strategies often rely on analyzing company fundamentals, tracking price trends and chart patterns, running quantitative models, or parsing broader economic indicators in hopes of spotting an edge. Whether it’s reviewing corporate balance sheets, studying moving averages and momentum, crunching numbers through algorithms, or interpreting employment and GDP data, each method aims to forecast what’s coming next.

Yet, despite the diversity of these techniques—fundamental analysis, technical signals, quantitative tools, or macroeconomic trends—history suggests that consistently timing the market remains a significant challenge for even the most sophisticated professionals.

Dimensional’s 2020 Mutual Fund Landscape report evaluated 4,279 US-based mutual funds, which account for more than $10.9 trillion, to assess the performance of managers relative to benchmarks.1 Across thousands of funds covering a broad range of manager philosophies, objectives, and styles, a majority of the funds evaluated did not outperform benchmarks after costs. According to the report, for the 20-year period through 2020, 19% of equity funds and 11% of fixed income funds survived and outperformed their benchmarks.

The Costly Toll of Transaction Fees on Market Timing

For investors determined to navigate the market’s ups and downs, transaction costs and commissions present a persistent obstacle. Each decision to jump in or out—whether shifting between funds or making tactical trades—comes with an associated price tag. These aren’t just occasional nuisances; repeated trades can quickly erode returns, especially in funds with higher expense ratios.

Several studies have found that, on average, investors employing frequent market timing tend to underperform broader indices by as much as 3% annually, with transaction costs as a primary culprit. Every buy or sell order chips away at performance, and over time, these costs compound—creating a drag that even the most well-timed trades struggle to overcome.

In essence, the friction of these expenses stacks the odds further against the market timer. Instead of gaining an edge, many end up simply paying more for the privilege of trying.

While there are a select number of fund managers that outperform, sometimes good track records happen by chance, and outperformance fails to repeat. Dimensional’s report shows that among funds ranked in the top quartile based on previous five-year returns, on average, a dismal 21% of equity funds also ranked in the top quartile of returns over the following five-year period. This lack of persistence casts further doubt on the ability of managers to consistently gain an informational advantage on the market.

Claims have been made that active managers provide better risk-adjusted returns; however, this has also been refuted. The S&P Indices Versus Active (SPIVA) scorecard recently published a risk-adjusted report and found that after adjusting for risk, the majority of actively managed domestic funds in all categories underperformed their benchmarks on a net-of-fees basis over mid-and long-term investment horizons.2 The results are shown in Exhibit 1 below.

Stock pickers may also postulate that during times of heightened volatility they have an edge. Chicago Booth’s Lubos Pastor and Booth Ph.D. candidate M. Blair Vorsatz, analyzed returns from 3,626 equity funds between February 20th – April 30th, 2020, and found that net of fees, a large majority of actively managed funds lagged behind their respective benchmark indexes.3 Meaning, right when investors would lean on active managers to protect downside risk, they were nowhere to be found.

Tax Implications of Short-Term Trading and Market Timing

Investors considering market timing—frequently buying and selling in pursuit of short-term gains—should be mindful of the tax consequences associated with such activity. When investments are held for less than a year, any profits are typically taxed as short-term capital gains. For most investors, this means those gains are subject to their ordinary income tax rate, which is generally higher than the long-term capital gains rate applied to assets held longer than a year.

Moreover, the more often you trade, the greater your exposure to these higher tax rates. Each time a position is opened and closed within a short window, the resulting gains are added to your taxable income for the year. Alongside this tax drag, active trading strategies often rack up elevated transaction costs and commissions, further eroding overall returns.

In essence, frequent trading behaviors not only struggle to consistently outperform the market, as discussed above, but can also leave investors with steeper tax bills and greater trading costs—two more headwinds that compound the challenges faced by market timers.

The results of these studies suggest that investors are best served by relying on market prices. Investment approaches based on a manager’s efforts to outguess market prices have resulted in underperformance for the vast majority of mutual funds. At Dimensional, the commitment to one investment philosophy, the robustness in portfolio design, and the efficiency in portfolio management and trading have enabled them to deliver an outstanding investment experience.

1 In the study results, “benchmark” refers to the primary prospectus benchmark used to evaluate the performance of each respective mutual fund in the sample where available. 2 https://www.indexologyblog.com/2020/05/19/risk-adjusted-spiva-year-end-2019-scorecard-most-active-managers-still-lagged/ 3 https://review.chicagobooth.edu/finance/2020/article/mutual-fund-managers-didn-t-shine-during-covid-19-crisis?source=ic-em2020505&mkt_tok=eyJpIjoiWWprMlpURmxOR0U1TmpndyIsInQiOiJBMWdWOW42TXRIZ0dGNG5rRDlQeWI3a28xQ29pbFFCXC9JNFpEQmFQRVZ nanhicERKejVLRm5cLzlEczFGSE9UYWw2ZFRES1hOdmVNZm9nbUlPMkt4YWhuZTU0ekZlYSt0MkY5d1pXUngyUUtBMVpneW5wU3dhUzB2NHR5b Dc2elVRIn0%3D