60/40 vs. 54/46: Can a Small Portfolio Change Matter Over 25 Years?

A six-percentage-point change in your stock allocation may not seem significant, especially after a market decline. But if that change remains in place throughout a long retirement, the effects of compounding can potentially make the difference much larger over time.

In this video, we continue the hypothetical retirement scenario from our previous discussion about what happens when the stock market falls 20% and you still need portfolio income. Our retirees originally intended to maintain a 60/40 stock-and-bond allocation but ended up with approximately 54% in stocks and 46% in bonds.

Using a simplified $1 million portfolio, we illustrate what could happen if the $60,000 difference in equity exposure remained invested more conservatively for 25 years. More importantly, we explore why portfolio rebalancing isn’t simply about keeping percentages looking neat—it is about making sure the portfolio you own remains aligned with the job it was designed to do.

Important: The return assumptions used in this example are hypothetical and illustrative. They are not predictions of future stock or bond returns.

Quick Answer

Can a 6% portfolio allocation difference matter over a 25-year retirement?

Potentially. In the video’s hypothetical $1 million portfolio, moving from 60% stocks to 54% stocks means $60,000 is no longer allocated to equities. If equities hypothetically average seven percentage points more than bonds over 25 years, the illustration shows approximately $266,000 of additional growth associated with that return difference. Actual results would depend on market returns, the length of time involved, withdrawals, spending, and changes to the portfolio.

Key Takeaways

• A move from 60/40 to 54/46 represents $60,000 less equity exposure in a hypothetical $1 million portfolio.
• Small allocation differences can become more meaningful when compounded over a long retirement.
• The video’s 7-percentage-point return difference is hypothetical and illustrative, not a forecast.
• Portfolio drift can happen because of market movements, withdrawals, spending, and other changes.
• More stock exposure isn’t automatically better; it can also mean greater volatility and downside risk.
• The important question is whether your current allocation is intentional and still appropriate for the job your portfolio needs to perform.
• Emotional reactions following a market decline can influence whether an investor rebalances.
• Rebalancing is about more than maintaining neat percentages—it’s about keeping the portfolio aligned with the retirement plan.

Who This Is For

This video may be especially helpful if you are approaching retirement or already retired and:

• Hold a diversified stock-and-bond portfolio
• Use investments to generate retirement income
• Have experienced portfolio drift after a market decline
• Are unsure when or why a portfolio should be rebalanced
• Are concerned about taking too much—or too little—investment risk
• Want to understand how relatively small investment decisions can compound over a long retirement

Transcript: Does a 6% Portfolio Difference Matter?

In the last video, What Happens If the Market Drops 20% right after you retire, our hypothetical retirees, John and Linda, ended up with about 54% in stocks instead of their original 60% target. But six percentage points, that doesn’t sound like much. But what if that six-point difference stays there for the next 25 years? Well let’s watch what happens.

Comparing 60/40 vs. 54/46

Okay, so let’s simplify this to a $1 million portfolio. At $6040, $600,000 would be in stocks. At $54.46, $540,000 would be in stocks. So we’re talking about $60,000.

That’s no longer in the equity allocation, but instead in bonds. And here’s the breakdown. At first glance, $60,000 inside a $1 million portfolio may not look like enough to matter very much, but the real issue isn’t the money today that’s not there. It’s the growth that that $60,000 may no longer capture if it stays in the more conservative side of the portfolio for decades.

The Potential Cost Over 25 Years

That’s where a small allocation difference can start behaving very differently over time. And in this illustration, we’re going to make one simple assumption. And that is that the average return, the difference of average returns between equities and bonds is seven points. That’s over that 25-year period.

Now it’s not a prediction of what stocks or bonds will earn, but we have to use a hypothetical net difference so we can isolate the opportunity cost, the potential opportunity cost. Of leaving that $60,000 out of the equity allocation. So let’s watch what happens to that money if the equity side earns an average of seven points more than the bond side over 25 years. Under that hypothetical scenario, the impact grows to a little over $325,000 in that $25-year period.

The original $60,000 is part of that number, so the additional growth associated with the 7% return advantage is roughly $266,000. So it’s not a forecast, it’s just a hypothetical example showing you the difference. Now, $266,000 more, that’s potentially your health care cost, that’s a big part of your long term care cost. Change the return difference, change the time period, and the result changes.

The point is what compounding can do to a small allocation difference over a long retirement. Now, this is where it gets more important. That long term difference didn’t come from a giant mistake.

How a Small Portfolio Drift Happens

It didn’t come from panic selling the entire portfolio at the bottom of a market decline. It came from a 6% point allocation drift that simply never got corrected. And remember how that drift happened in the first place. The market fell, retirement income was taken, and the portfolio was left in a different position afterward.

A short-term event quietly became a long-term portfolio decision. And real retirement usually won’t stay exactly six percentage points off target. Another year, it could move back the other direction. Markets change and withdrawals happen.

Your spending needs obviously will change too, but if nobody is paying attention to the allocation, those small shifts can keep accumulating over time. And of course, we’re not going to model all of that here because the math gets very complicated, but the principle is the same. Small unintended changes can quietly compound into a portfolio that behaves very differently from the one you originally designed.

More Stocks Aren’t Always Better

Now, this is not an argument that more stocks are always better. More stock exposure also increases volatility and more downside risk. The 5446 portfolio could behave better during some market declines than the 6040. So this isn’t a choice between good and bad.

It’s a trade-off between different levels of growth potential, volatility, and risk. The point is that the allocation should be intentional. So it’s not whether 5446 is good or bad or better or whatnot.

Was the Allocation Change Intentional?

The question is whether John and Linda intentionally chose that 5446. Because if their plan called for 6040 and it was expecting the growth that a 6040 portfolio is expected to generate, and they stayed at 5446 for the next two and a half decades, then a temporary market event may have permanently changed the way their retirement portfolio behaves. Small allocation changes can become long-term retirement decisions.

Even when nobody consciously made that decision. That’s why rebalancing isn’t simply about keeping percentages neat on a statement. It’s about keeping the portfolio aligned with the job it was designed to do. So when you see your portfolio drift from 6040 to 5446, the better question isn’t, is 6% really a big deal?

Can I just leave it? It’s, is this still the portfolio I intend to own? And if it isn’t, was that an intentional decision or did it just happen?

How Emotions Can Affect Your Portfolio

That’s what I mean when I say we’re trying to show you on this channel more about how retirement behaves. One decision changes the portfolio. The portfolio changes what happens next. And then time compounds the difference.

Rules tell you what’s possible, behavior shows you what happens next. I’ve seen many times in my career where once the market does decline and your allocation drifts from 60-40 to the let’s say 5446. And you’ve gone through that decline psychologically, you may be inclined to just leave it because now it’s a little bit less in equities, there’s a little bit less risk, you may have been jolted by the market decline, and that is a mistake.

Now, it’s a mistake because it’s a decision that’s being driven by emotions, you know, not logic, or not what the portfolio needs to achieve its growth targets to provide income and help maintain security over the course of you and your spouse’s retirement. So just be aware of that. Is is sometimes when our emotions impact our decisions, we’re simply trying to protect ourselves.

And you know what? We don’t want to get back to 6040. We’re fine at 5446. Just make sure that 5446 is still expected to generate the income that you need, the growth that you need, and be there to to help you live a secure retirement over time.

What Happens When Stocks Rise 20%?

Okay, so far we’ve watched what happens when stocks fall and you still need retirement income. But what happens when stocks go the other direction? What happens if stocks rise 20% and you still need to generate the same level of income? Now the withdrawal decision creates a completely different set of trade-offs.

That’s what we’re going to walk through on the next video.

➡️Watch the first video in this series: https://youtu.be/Ho-JwC3H04A

➡️ Want to better understand how your portfolio can support the income you need throughout retirement? Download our free guide, 5 Ways to Turn Savings Into Retirement Income, to explore five approaches to turning the savings you’ve built into retirement income. https://click2retire.com/5-ways-guide-download

FAQs

What is portfolio drift?

Portfolio drift occurs when changes in investment values or portfolio activity cause your asset allocation to move away from its intended target. In this example, a portfolio intended to hold 60% stocks ends up holding approximately 54%.

Is there a big difference between a 60/40 and 54/46 portfolio?

The immediate difference may appear relatively small, but the long-term result depends on returns, withdrawals, time, and other factors. The video uses a hypothetical scenario to demonstrate how a small difference in allocation could compound over 25 years.

How much of a $1 million portfolio is the difference between 60% and 54% stocks?

Six percent of a $1 million portfolio is $60,000. In the video’s example, that $60,000 is invested in bonds rather than equities.

Could a 6% portfolio difference really result in $266,000 less growth?

Under the video’s specific hypothetical assumptions, yes. If the $60,000 difference experienced a hypothetical seven-percentage-point annual return advantage for 25 years, the incremental growth associated with that difference would be approximately $266,000. That is an illustration rather than a prediction of future investment performance.

Is a 60/40 portfolio better than a 54/46 portfolio?

Not necessarily. A portfolio with greater stock exposure generally has different growth potential, volatility, and downside risk. The point of the example isn’t that 60/40 is universally better; it’s that an investor’s allocation should be intentional and aligned with their retirement plan.

Why is rebalancing important in retirement?

Rebalancing can help bring a portfolio back toward its intended asset allocation after markets or withdrawals have changed it. As Troy explains in the video, the purpose isn’t simply to make percentages look neat; it’s to keep the portfolio aligned with the job it was designed to do.

Should you rebalance after the stock market falls?

That depends on the investor’s goals, income needs, risk tolerance, tax situation, and intended asset allocation. One important consideration highlighted in the video is whether leaving the new allocation in place represents an intentional planning decision or an emotional reaction to the market decline.