What Is a Multi-Factor Fund?
Betting on a single investment factor means betting on that factor staying in favor, and multi-factor funds exist largely as a response to how unpredictable that timing can be.
The short answer
A multi-factor fund is built to target several investment factors at the same time, such as value, quality, and momentum, rather than relying on just one. The goal is to diversify across factors so the fund isn’t overly dependent on any single one being in favor at a given moment. It’s still a rules-based approach, similar in spirit to other smart beta strategies, just applied across multiple criteria simultaneously.
Why combining factors is the point
Individual factors — value, momentum, quality, low volatility, and others — tend to move in and out of favor depending on broader market conditions, sometimes performing well for extended stretches and then lagging for equally long stretches. A fund built around a single factor is exposed to that factor’s own cycle, for better or worse. Combining multiple factors is meant to smooth out some of that unevenness, on the theory that different factors won’t necessarily underperform at the same time, though there’s no assurance this diversification works as intended in every market environment.
How the combination typically works
- Factor scoring. Companies are often scored on how strongly they exhibit each targeted factor, using measurable criteria defined in the fund’s methodology.
- Combined weighting. Those individual factor scores are then combined, according to a published formula, to determine each company’s overall weight or eligibility in the fund.
- Ongoing rebalancing. Because factor scores change as company fundamentals and prices move, multi-factor funds require periodic rebalancing to keep the portfolio aligned with its target factor exposures.
What this changes about diversification
Multi-factor funds diversify along a different dimension than a fund merely holding many different companies. Two funds could hold an overlapping list of stocks, yet a multi-factor fund still concentrates exposure toward whichever factors it targets, so it isn’t necessarily more diversified in the conventional sense of spreading risk across unrelated companies or industries. Understanding diversification in this context means recognizing that factor exposure and company-count diversification are two separate concepts.
Trade-offs worth understanding
Combining factors adds complexity to a fund’s methodology, which can make it harder for an investor to fully understand what’s driving performance at any given time compared to a simpler, single-factor or plain cap-weighted approach. It can also mean the fund’s expense ratio runs higher than a conventional index fund, reflecting the added rules and periodic recalculation involved in maintaining multiple factor exposures at once.
What to weigh
A multi-factor fund is an attempt to capture the potential benefits of factor investing while reducing dependence on the timing of any one factor’s performance. Whether that trade-off makes sense depends on how well an investor understands the specific factors involved and is comfortable with the added complexity relative to a simpler indexing approach.