Traditional and Alternative Risk Premia: What You're Really Paid For

Every durable investment return has a reason behind it. Strip away the noise and the marketing, and a long-run return stream is almost always payment for bearing some risk that other investors would rather avoid — or for exploiting a mistake they keep making. That payment is a risk premium, and learning to see markets through the lens of risk premia is one of the most clarifying shifts an investor can make. It turns a bewildering universe of strategies and products into a much smaller set of underlying return drivers.

We map this territory from complementary angles: a primer on harvesting traditional risk premia, and a review of a study cataloguing 59 alternative risk premia. Together they offer a useful framework for family offices, advisers and private investors trying to understand what, exactly, they are being paid for.

Start with the traditional premia

The oldest and largest risk premium is the simplest: the equity premium. Stocks have historically returned more than bonds, and bonds more than cash, because their returns are more uncertain and tend to disappoint precisely when investors can least afford it — in recessions and crises. The Capital Asset Pricing Model formalised this in the 1960s with one elegant idea: you are rewarded only for risk you cannot diversify away. Idiosyncratic, company-specific risk earns nothing, because it can be hedged; only systematic, market-wide risk is priced.

In practice, investors split this into several "asset-class premia" — developed and emerging equities, government and corporate bonds, credit, and so on. These are the traditional building blocks of strategic asset allocation, and for most portfolios they still do the heavy lifting. The deeper insight from decades of research is that systematic risk is, at root, business-cycle risk: assets are priced according to how they behave as the economy expands and contracts.

The equity factor premia

The CAPM's one-premium story did not survive contact with the data. Beginning in the 1980s, researchers found persistent return patterns the market factor alone could not explain. Small companies outperformed large ones (the size effect). Cheap, high-book-value stocks beat expensive ones (the value effect). Fama and French folded these into their famous three-factor model, later adding profitability and investment — together a quality dimension — to reach five factors. Carhart added momentum, the tendency of recent winners to keep winning. And a low-risk premium emerged: the counter-intuitive finding that low-volatility stocks tend to deliver better risk-adjusted returns than racier ones.

These five — size, value, quality, momentum and low-risk — are the workhorses of equity "factor investing" and smart beta. Crucially, they remain long-only equity tilts: ways of leaning a stock portfolio toward characteristics that have historically paid.

Alternative risk premia: the same ideas, unleashed

Here the picture opens up. Alternative risk premia take the factor-investing idea and free it from the long-only equity box. The same concepts — value, carry, momentum, low-volatility — can be applied across rates, credit, currencies, commodities and even volatility itself, and expressed as long/short portfolios that can profit whether markets rise or fall. Value isn't just cheap stocks; it's cheap currencies and commodities too. Carry isn't just high-dividend equity; it's harvesting the yield difference between currencies, the roll in commodity futures, or the premium from selling expensive option volatility. Researchers catalogued up to 59 such premia spanning every major asset class.

This matters because these strategies behave very differently from a stock portfolio, which makes them genuinely diversifying. They are the raw material of much of the hedge-fund and liquid-alternatives industry — and once you can replicate them cheaply, a surprising amount of "hedge fund alpha" turns out to be these alternative betas in disguise.

The distinction that matters most

The single most important idea in this literature is that "alternative risk premia" actually contains two very different animals, and conflating them is dangerous.

The first are true risk premia — compensation for taking on pain at the worst possible time. Carry trades and selling volatility are the archetypes: they earn small, steady gains for long stretches, then suffer sharp losses in a crisis. The payoff looks like selling insurance, and the return is the insurance premium. These strategies are negatively skewed by nature; their risk lives in the tail, not in the day-to-day wobble.

The second are market anomalies — returns that stem from behavioural mistakes rather than risk-bearing. Momentum is the classic example: it is hard to identify a tangible risk that momentum investors are compensated for, and easier to explain it through investor under- and over-reaction.

Why does the distinction matter? Because the two age differently. A genuine risk premium should persist, since someone must always be paid to carry the risk. An anomaly can be arbitraged away as more capital chases it — though, as with momentum, behavioural biases can prove remarkably durable. An allocator should know which kind of return they are buying.

Volatility is the wrong yardstick

A practical warning follows directly. Because many alternative premia have option-like, negatively skewed payoffs, the standard risk measure — volatility — badly understates their true danger. A short-volatility strategy can look wonderfully smooth, with low measured volatility, right up until it loses a third of its value in a fortnight. Skewness does not aggregate the way volatility does: a portfolio of individually modest-looking strategies can carry concentrated tail risk that a volatility-only view never reveals. Managing these exposures means watching drawdowns, skewness and tail risk — not just the standard deviation on a fact sheet.

They are capricious, and they move with the cycle

A final lesson both papers stress: risk premia are not constant. They wax and wane with the business cycle and with investors' shifting appetite for risk. A premium can be richly rewarded for years, then lie dormant or turn negative for an uncomfortable stretch. This time-variation is why simply buying a factor and forgetting it often disappoints, and why disciplined harvesting tends to pair a strategic exposure with some conditioning on the economic environment.

What it means for allocators

The risk-premia lens reframes diversification itself. True diversification is not owning many products; it is owning many independent sources of return — across asset classes, and across the factors that cut through them. Traditional premia anchor the portfolio; equity factors refine the equity sleeve; alternative premia add return streams that can behave differently when traditional markets struggle.

But the framework also demands discipline. Each premium should earn its place with a credible reason for existing, an honest accounting of its tail risk, and a risk-management approach suited to its payoff shape rather than a one-size-fits-all volatility budget. Harvested that way, risk premia are the most reliable building blocks an investor has. Treated as free money, they have a habit of collecting their due at the worst possible moment.

At Vayo Capital, this is the architecture behind our multi-strategy approach: assembling economically grounded return premia — traditional and alternative — and running each within a risk framework built for how it actually behaves.

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This article draws on "A Primer on Alternative Risk Premia" (Hamdan, Pavlowsky, Roncalli and Zheng, Lyxor Asset Management, 2016) and "How to understand and harvest risk premia in capital markets" (Peter Oertmann, Vontobel/Vescore, 2018). It is educational and not investment advice; figures and findings reflect the cited research, not Vayo Capital returns.

Frequently asked questions

What is a risk premium? A risk premium is the extra return investors expect for bearing systematic, non-diversifiable risk — risk that cannot be hedged away. In capital markets this systematic risk is closely tied to the business cycle. Risk that is specific to a single company is not rewarded, because it can be diversified.

What is the difference between traditional and alternative risk premia? Traditional risk premia are long-only exposures to asset classes (equities, bonds, credit) and to equity factors such as value and size. Alternative risk premia extend the same factor ideas across rates, currencies, commodities and volatility, usually as long/short strategies that can profit in rising or falling markets.

What are the main equity factors? The five most established equity factors are size, value, quality (profitability and investment), momentum, and low-risk (low volatility). They are the foundation of factor investing and smart-beta strategies.

Why is volatility a poor risk measure for alternative risk premia? Many alternative premia — such as carry and short-volatility strategies — have option-like, negatively skewed payoffs: steady small gains punctuated by rare large losses. Volatility understates this tail risk, so drawdown and skewness measures are more informative.

Are risk premia constant over time? No. Risk premia vary with the business cycle and with investor risk appetite. A premium can be well rewarded for years and then dormant or negative for a stretch, which is why disciplined, risk-managed harvesting matters more than a buy-and-forget approach.