We made it, another year is in the books and everyone has an opinion on where the market is going. My line of work involves me adamantly advising people not to try to predict markets, but even I have an opinion about what might happen in the future. Thankfully, there’s a difference between having an opinion and making a poor investing decision.

So where are we now? We’re coming off of a historically great period of market returns, especially in the category of U.S. large growth companies (the S&P 500, which happens to be the category we almost exclusively hear about in the news). Since U.S. large growth companies have faired well, so have investors, because the vast majority of investors have the majority of their investments in large U.S. growth companies. That’s great news right now. But it’s also a problem.

Large growth companies are historically one of the poorest performing asset categories in the free market. This holds in performance data going back one hundred years, but it also makes sense a priori. Large growth companies are inherently less risky than small and value companies, they stay in business longer, they seldom go bankrupt (it happens, just not as often), and their prices don’t fluctuate as significantly. Small companies are often younger, less established, and more susceptible to tough markets. Value companies are often distressed and sometimes never recover. These small and value companies default more often and their prices are more volatile, they’re riskier.

You’ve heard the principle, risk equals return. That applies here. It makes sense that as entire asset classes, small companies and value companies outperform large growth companies by a significant margin over time because their additional risk brings additional return. The fact that large growth companies have performed so well over these last ten years is great, but it also means that at some point we’ll see these returns balance out. Now, I would never pretend to know which asset classes will perform better or worse next year, that’s a fool’s errand which we refer to as ‘market timing.’ But I do know that most years will favor a diversified portfolio that leans toward small and value asset classes instead of a heavy weighting towards large growth companies. Next year the most likely circumstance is that you’ll be happy to have left your large growth company portfolio to get into a more diversified situation, which, incidentally, is true at the end of every year.

So the obvious question is how to diversify with a lean towards small and value companies. I’ve covered this before, but total market index funds won’t help you here, because of cap weighting total market funds are invested almost entirely in large growth companies. Index funds have become very popular over the last 20 years and, while they’re certainly an improvement over active funds, they’re inherently flawed. To get into an ideal portfolio takes an advisor committed to the academics of investing utilizing structured funds (a solution to the index fund problem).

Take the opportunity to review your portfolio as we head into the new year. The returns may look great, but that doesn’t mean you’re in a great portfolio.