How to Compare Investment Sectors Without Chasing Last Year’s Winners
Every year, one or two investment sectors post returns that make everything else look pedestrian. And every year, a predictable wave of capital flows toward them, drawn by the numbers and the narrative that's built up around them. The technology sector in 2020. Energy in 2022. The pattern repeats with enough regularity that it has a name: performance chasing. And the research, including analysis from fund research specialists like Fund Calibre, is fairly consistent. It tends not to work.
That doesn't mean sector allocation is a fool's errand. It means the way most people approach it is. Comparing sectors by recent returns is a bit like navigating by looking out the rear window. The view is detailed, and the information is real. It just isn't telling you where you're going.
Why Last Year's Returns Are a Poor Guide
Strong sector performance in a given year is the outcome of a specific set of conditions: interest rate environment, consumer behaviour, commodity prices, regulatory landscape, currency movements, and, in many cases, a degree of sentiment that outpaces the underlying fundamentals. Some of those conditions persist. Most don't.
The sectors that lead in one year frequently underperform in the next, partly because strong performance attracts capital that bids up valuations, and partly because the conditions that drove the outperformance shift. Buying into a sector after a strong run means paying elevated prices for assets whose tailwinds may already be fading.
This isn't a theoretical problem. It consistently shows up in investor returns data. The average investor in sector funds tends to underperform the funds themselves because they buy after performance and sell after drawdowns. Timing the entry matters, and recent returns are a poor signal for timing.
Research from DALBAR’s Quantitative Analysis of Investor Behavior has repeatedly found that investor returns often lag the returns generated by the investments they hold. A key reason is behavioral timing—investors frequently add capital after periods of strong performance and reduce exposure following market declines, resulting in outcomes that differ from the underlying investment's long-term return profile.
What to Look at Instead
Comparing sectors usefully requires looking at a different set of variables. Valuation is the starting point. What are you paying for future earnings relative to the sector's historical average and relative to other sectors? A sector trading at a significant premium to its own history requires stronger growth to justify the price, which increases the risk if that growth doesn't materialise.
Earnings cycle positioning matters too. Sectors move through cycles tied to the broader economy and their own supply and demand dynamics. Understanding where a sector sits in its cycle, whether it's early growth, mature, or facing structural headwinds, gives more useful information than a trailing return figure.
Interest rate sensitivity varies considerably across sectors. Utilities and real estate, for example, tend to carry significant debt and become less attractive when rates rise. Technology companies with long earnings durations are similarly affected. Financials, by contrast, often benefit from rising rates. Understanding these relationships helps anticipate how macroeconomic shifts will affect different parts of the market before those effects show up in returns.
Structural trends are worth assessing separately from near-term conditions. Sectors with genuine long-term tailwinds, demographic shifts, technological change, and regulatory direction can recover from short-term underperformance in a way that purely cyclical outperformers cannot.
Current market conditions also illustrate why sector analysis requires a forward-looking perspective. Investor enthusiasm surrounding artificial intelligence has supported strong interest in technology stocks, while energy companies continue to be influenced by commodity-price cycles and shifting supply-demand dynamics. Healthcare valuations, meanwhile, are often shaped by demographic trends, innovation pipelines, and regulatory developments. At the same time, changes in interest rates can affect sectors differently, influencing borrowing costs, earnings expectations, and investor sentiment. These factors highlight the importance of evaluating the drivers behind sector performance rather than focusing solely on recent returns.
The Role of Diversification
Sector analysis is most useful when it informs allocation decisions within a diversified portfolio rather than driving concentrated bets. The honest reality is that accurately and consistently predicting which sector will lead in a given year is extremely difficult, even for professionals with significant research resources.
What diversification across sectors provides is not the highest possible return. It is a smoother path and protection against being heavily exposed to a single sector at the wrong point in its cycle. Rebalancing periodically, rather than rotating toward recent winners, is the mechanical version of this discipline.
This approach is supported by research from Vanguard, which has examined the role of portfolio rebalancing in maintaining strategic asset allocations over time. While rebalancing does not guarantee higher returns, Vanguard's research suggests it can help investors manage risk, maintain diversification, and avoid the tendency to allow recent outperformers to dominate portfolio allocations.
Doing the Analysis
A practical sector comparison might look at five or six variables side by side: current valuation relative to historical average, earnings growth expectations for the next one to two years, sensitivity to prevailing macroeconomic conditions, sector momentum (medium-term, not just one year), and any structural factors that are likely to affect demand over a longer horizon.
This kind of analysis takes longer than sorting a table by annual return. It also produces conclusions that are less immediately satisfying, because the answer often isn't a single obvious winner. But it is considerably more likely to result in decisions that hold up over a full market cycle rather than looking good in January and disappointing by December.
The best entry point into a sector is rarely the moment after everyone has already decided it's the best sector to be in.