In our ongoing effort to clarify and simplify, we keep the financial jargon to a minimum. But even where we may succeed, you’re likely to encounter references elsewhere that can turn valuable information into mumbo-jumbo. Consider us your interpreter. Today, we’ll explore correlation, and why it matters to investing.

A Quick Take: Correlation Helps People Invest More Efficiently

Expressed as a number between –1.0 and +1.0, correlation quantifies whether, and by how much two holdings have behaved differently or alike in various markets. If we can identify holdings with weak or no expected correlation among one another, we can combine these diverse “pieces” (individual investments) into a greater “whole” (an investment portfolio), to help investors better weather the market’s many moods.

Correlation, Defined

As suggested above, correlation is more than just a quality; it’s also a quantity – a measurement – offering two important insights along a spectrum of possibilities between –1.0 and +1.0:

1. Correlation can be positive or negative, which tells us whether two correlated subjects are behaving similar to or opposite of one another.
2. Correlation can be strong or weak (or high/low), which tells us how powerful the similar or opposite behavior has been.

Correlation, Applied

Most investors are aware of the benefits of diversification, or owning many, as well as many different kinds of holdings. A well-diversified portfolio helps you invest more efficiently and effectively over time. Diversification also offers a smoother ride, which helps you better stay on course toward your personal financial goals.

But in a world of nearly infinite possibilities, how do we:

• Compare existing funds – If one fund is expected to perform a certain way according to its averages, and another fund is supposed to perform differently according to its own averages, how do you know if they’re really performing differently as expected?
• Compare new factors – What about when a researcher claims they’ve found a new factor, or source of expected returns? As this University of Chicago paper explains, “factors are being discovered almost as quickly as they can be packaged and sold to the waiting public.” How do we determine which are actually worth considering out of the hundreds proposed?
• Compare one portfolio to another – Even perfectly good factors don’t always fit well together. You want factors that are not only strong on their own, but that are expected to create the strongest possible total portfolio once they’re combined.

Correlation is the answer to these and other portfolio analysis challenges. By quantifying and comparing the behaviors and relationships found among various funds, factors and portfolios, we can better determine which combinations are expected to produce optimal outcomes over time.

Correlation, Concluded  

Heeding correlation data is a lot like having a full line-up on your favorite sports team. If each player on the roster adds a distinct, useful and well-played talent to the mix, odds are, your team will go far. Similarly, your investment portfolio is best built from a global “team” of distinct factors, or sources of returns. A winning approach combines quality components that exhibit weak or no correlation among or between them across varied, long-term market conditions.

Let us know if we can use our experience and expertise to help you build a more diversified and less correlated portfolio.

When you invest your hard-earned money, of course you hope to end up with more than when you started. Better yet, you would prefer to NOT give up returns you could have had by investing optimally.

But what is “optimal” investing? It’s not about pursuing an active investment strategy – i.e., trying to consistently pick winners, dodge losers, and accurately forecast when to be in and out of up and down markets. Nor is it about hiring an active manager who thinks they can do the same. The evidence is clear: The challenges of active investing are more likely to set you back than advance your interests.

For the past several years, Dimensional Fund Advisors has been tracking mutual fund track records in “The Mutual Fund Landscape.” If anything, the terrain keeps getting  tougher. This year’s report found that, across 15 years ending December 2017, only half of the stock funds in existence at the beginning were even around at the end, and only 14% were able to survive and outperform their Morningstar benchmarks.

The moral of the story: To run a successful marathon it’s better to pace yourself than chase the wind. Same thing for your wealth. Take the Long View®.

While the more familiar expression, “no pain, no gain,” may apply to many parts of life (such as my first half-marathon), sometimes pain is just pain, with no gain in sight. When that’s the case, shouldn’t you do something to avoid it?

That’s the point of a recent video produced by our friends at Dimensional Fund Advisors, “Tuning out the noise.” The first minute is admittedly stressful; it evokes the angst many investors feel when they try to navigate nerve-wracking markets on their own. Bear with it though, because you have much to gain from the video’s message: By showing investors how to Take the Long View® with their investments, our aim is to help people tune out the pointless pain, look past the daily fray, and get on with investing toward their lifetime goals.

Check out the video for yourself. Or, if you prefer to read rather than watch, here’s an article Dimensional produced along the same theme. Last but not least, if you could use some rational advice to cut through the clamor, we’re here to listen.