Multi asset: using long-term reversals to guide valuations

momentum and value effects.

Sometimes, a contrarian approach means listening to how the waves are breaking rather than swimming against the tide. 

Value and momentum have long been understood as two key components of price formation. First, assets outperforming and underperforming in the past tend to continue doing so in the coming weeks, forming a momentum effect. Second, assets showing elevated (or respectively low) prices compared to their historical norm tend to generate negative (or respectively positive) returns, forming a value effect. 

Both effects correlate negatively. On that basis, reversal strategies pair very naturally with their trend-following alter egos and, as such, are natural components of our investment toolkit as systematic investors. 

the ebbs and flows of mean reversion.

If both effects are now well known, building a value strategy remains complex for a variety of reasons. The main one is the lack of consensus about how to gauge the valuation of an asset, or at least that such a process is mainly specific to each asset-class. 


Measuring valuation as long-term reversal appears appealing because it provides an approach free of economic models and one that is purely based on price data.
 

To escape this pitfall, we have followed in the footsteps of the economist Fischer Black, who in 1986 positioned the value premium as the counterpart to the momentum premium1. He postulated that market trends are created by relatively uninformed trades that push asset prices far from the unobserved fundamental value of an asset, until the spread becomes so wide that mean reversion will occur. Thus, measuring valuation as long-term reversal appears appealing because it provides an approach free of economic models and one that is purely based on price data. 
 

click here to explore our multi-asset strategy.

LOIM’s cross-asset value signals.

The question, however, remains as to the choice of econometric model. For our part we have adopted economist  James D. Hamilton (2018)’s proposed decomposition of price dynamics2 between the trend and cycle components to create our cross-asset value signals. Implemented at the end of Q2 2024 in our portfolios, it is too early to draw meaningful conclusions about its performance. But early signs are positive and the interaction with our trend-following strategies is as expected, i.e., diversifying and therefore accretive to risk-adjusted returns, our ultimate yardstick. 

Interestingly and anecdotally over Q3, value and trend both flagged duration as a buying opportunity. Although this is no longer the case – as the value overlay has exited its position – the lesson is simple: having a contrarian bent does not always dictate swimming against the tide. 

author.

LOcom-AuthorsAM-Forclaz.png

Alain Forclaz
Deputy CIO, Multi Asset

after the bell.

What is your dream guest list for a dinner party? 

  • Leonard Bernstein, one of the most influential figures in classical music in the 20th century who did more than anyone else to popularise the form

  • Robert Badinter, a man of infallible righteousness who, as Justice Minister, enacted the abolition of the death penalty in France in 1981

  • Arnold Schwarzenegger, who achieved the rare feat of being successful as a body builder, an actor and a (non-US-born) Republican governor in a primarily Democratic-leaning state

  • Ed Thorpe, the mathematician who cracked blackjack, roulette and convertible arbitrage, all with an original and independent approach
     

read another asset class view

explore more Sharpe thinking.

Please enter your first name.

Please enter your last name.

Please enter your Company Name.

Please enter your job title.

Please enter a valid professional email address.