What is a Smart Beta ETF?


A product that tries to combine the best of passive and active investing sounds too good to be true, but is it? Here’s what you need to know.

What is a Smart Beta ETF? The goal of a Smart Beta Exchange Traded Fund (ETF) is to beat the market or to match it while taking less risk. That’s exactly what an active investing product would hope to do. Yet Smart Beta ETFs also follow an index and deliver the simplicity, transparency and low cost advantages of passive investing vehicles that only aim to equal the market. 


Can we really have the best of both worlds?

Smart Beta ETFs seek to exploit investing anomalies that are known to have beaten the market over the long term.
For example, the set of undervalued companies, highly profitable companies, small companies and companies whose share prices have risen over the last 12-months have long track records of outperformance.
The secret is to create an index that filters out the companies that don’t fit the Smart Beta profile and concentrate on those that do.
To understand this more, let’s consider how a purely passive ETF works. It will generally follow a market cap index, for example the FTSE All-Share or the S&P 500.
Securities in these indices are tracked in direct proportion to their market value. In other words, if Apple is worth 5% of the market value of all the companies in the index then it will be given a 5% share of the index.
An ETF that replicates that index will then generally hold 5% of its assets in Apple.
It’s by holding the same securities as the market (as measured by the index), and in the same proportions, that a passive ETF seeks to deliver the returns of the market.
That’s a comparatively simple process because the index automatically makes the fund manager’s investing decisions – which is why ETFs can charge extremely low fees.
By contrast, a Smart Beta index that tracks, say, undervalued companies will apply a formula to the market index in order to upweight stocks that look cheap and downweight those that seem expensive.
Apple may only make up 1% of this Smart Beta index, or may not be held at all, or it could be weighted at 10% if the formula rated Apple as undervalued in comparison to the rest of the market.
By using the formula to weight its index in favour of cheap companies, the ETF hopes to beat the market by holding more of the types of securities that have historically outperformed.

But one should also be aware that smart beta index concepts can be complex in its own right and require a thorough understanding of the index. In addition, Smart Beta indices tend to be more expensive and show a higher turnover in the underlyings of the index. Still, they tend to be much cheaper than their active counterparties.

Why should this work?

Because world-leading financial academics and analysts have delved deep into the data to uncover which types of securities have provided the greatest return over the lifetime of the markets.
In the same way that equities beat cash and bonds over time because investors expect to be rewarded for investing in riskier assets, the academics have discovered securities which outperform their peers because they are more risky or because they somehow confound human behaviour, causing them to be undervalued.
The academics have also developed formulas which help identify these special security categories which are known as investing styles or factors. It’s these factors and formulas which underpin Smart Beta ETFs.
There are many different factors out there but the five most successful and reliable are:
Value – value companies are sluggish, unglamorous firms that are often saddled with debt, volatile dividends and a high degree of earnings risk. Their position looks weak and they tend to be heavily punished during recessions. Investors are known to underrate these stocks in comparison to sexy, high-growth firms like tech start-ups, which explains why a value firm’s comparative cheapness can be a source of strong future returns.

Small cap – smaller companies are riskier than large cap ones because they’re more vulnerable to misfortune. For example, bad management, the loss of key staff, a regulatory change or the predations of bigger rivals can all ruin the outlook for a small firm. Hence investors expect a greater investment return in exchange for taking on greater risk.

Quality – companies that are making the most efficient use of their capital tend to outperform less efficient rivals over time. For example, a company that is investing heavily in R&D is more likely to produce the innovative products that will enable it to make hay in the years ahead. However, investors often underrate quality firms because their spending makes them look like they’re underperforming now in comparison to cost-cutting rivals.

Momentum – rising stocks will tend to keep rising for a limited period (12-months or less) while losing stocks will continue to fall. This appears to be because investors tend to over-react and under-react to news. For example, pushing the prices of a darling company to new heights on scant evidence while stubbornly clinging on to a loser even in the face of more bad news. 

Low volatility – low volatility stocks have historically delivered market-like returns but for significantly less risk. Low vol companies tend to be large, non-cyclical outfits that are resilient during recessions. For example, we need utility companies to keep powering our homes no matter what, so their profits aren’t badly hit even during tough times. However, profits are unlikely to soar during boom times either as people don’t tend to keep the heating on all day just because they can.
Although all five of the factors above have significantly outperformed the market historically, there is no guarantee they will continue to do so in the future. Moreover, factors can fall out of favour and lag the market for many years.

By taking on these risks, investors expect to be rewarded with greater returns when economic conditions and sentiment cause individual factors to bounce back.

Historically, the factors „Value“, „Momentum“ and „Small Cap“ have been pro-cyclical. They did especially well in times of economic growth and rising inflation and interest rates. On the other hand, „Quality“ and „Low Volatility“ have been defensive and delivered outperformance in downturns.

New investors should therefore understand that the Smart Beta promise of market-beating returns will not necessarily come true and you may have to endure years of underperformance before your investment pays off.

However, the main factors listed above have been shown to work across multiple countries, asset classes and decades which is why Smart Beta has become so popular.

Better still, some of the factors have low correlations with one another, so the underperformance of one can often be offset by the outperformance of another. For example, value is known to have low and even negative correlations with profitability and momentum.

Smart Beta Factors in Comparison

Factor Historic
Business Cycle
Value Equal to normal market risk Low with Momentum and Quality Pro-cyclical
Small Cap Higher than normal market risk Low with Low Volatility and Quality Pro-cyclical
Momentum Equal to normal market risk Low with Value and Quality Pro-cyclical
Quality Lower than normal market risk Low with Value, Small Cap and Momentum Defensive
Low Volatility Lower than normal market risk Low with Value and Momentum Defensive

Source: MSCI.com Research Paper; Foundations of Factor Investing
You can find Smart Beta ETFs by using the Equity Strategy drop-down menu of our ETF screener.
The following strategies all count as Smart Beta: