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The CO₂lumnist: Should derivatives have a carbon footprint?

The CO₂lumnist: Should derivatives have a carbon footprint?

02-09-2021 | Column
Investors rely on data to make decisions on climate strategy, but who should be responsible for emissions – the creator or the user? In the fourth of a new series of columns taking a more light-hearted look at the issue, Robeco data scientist Thijs Markwat asks whether derivatives have more to answer for than you may think.
  • Thijs Markwat
    Thijs
    Markwat
    Researcher

In this memo I discuss a topic which I have been heavily struggling with for a while. It is about whether we should attach a carbon footprint to financial derivatives. Several earlier attempts to get insight in the matter have failed. Also asking Google has not been very helpful. Below I share my thoughts on the matter.

Consider someone named Daniel, who decides to invest in a local farm. The investment is for one year, and after that year Daniel gets his investment back. Given the plans of the farm, Daniel expects to earn a nice positive return, but he knows the return can become negative in case of adverse events. Given the capital structure of the farm, we can calculate that Daniel ‘owns’ 1% of it. In such a situation we would also say that Daniel is responsible for 1% of the greenhouse gas emissions (mostly methane from the cows).

Half a year later, Daniel finds out that his dreamhouse is for sale. Transfer of ownership should take place in half a year, which is around the time the loan for the farm is due. At first, Daniel is incredibly happy, but soon the realization kicks in that he will not have enough money if the investment outcome is disappointing. As the house is really a once-in-a-lifetime opportunity, he desperately decides to look for a solution. 

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Fulfilling a dream

He starts with the most obvious option and asks the farm whether he could already receive his investment back. The farm replies that they used his investment to increase livestock, and that they are not willing to sell any cows at the moment. Therefore, he starts thinking of other ways to fulfil his dream. After drinking many cups of (virtual) coffee with colleagues, he finds someone named Carola able to help him realize his dream. They agree that Carola will get all the profits from Daniel’s investment. Thus, in a good year for the farm, Carola will get all the profits, but in a bad year she needs to make up for the losses. 

After formalizing their financial agreement Daniel claims that Carola is now responsible for the greenhouse gas emissions. Daniel states that with transferring the economic exposure of the farm’s business activities to Carola, she is also responsible for the emissions. Carola, on the other hand, is convinced that Daniel remains responsible for 1% of the greenhouse gas emissions, since he has still invested exactly the same amount as before, while she has not invested anything at all. I agree with Carola and let me explain why.

Who ‘owns’ the company

I believe what ultimately matters for carbon accounting is who ‘owns’ a company. All the owners of a company together provide the capital that enables its economic activities and emissions. Suppose, for instance, that Daniel would not have invested at all; then the farm would have less capital, could buy less cows, and hence would have lower emissions. The farm’s emissions are thus directly related to the capital. 

On the other hand, transferring the economic exposure from Daniel to Carola has no impact on the financial capital structure of the farm, nor on the amount of cows, and therefore the emissions stay exactly the same. Thus, for the footprint of the farm, it is totally irrelevant whether Daniel or Carola carries the risk. As the emissions are directly related to the total amount of capital, but it is irrelevant who carries the economic exposure, it perfectly makes sense to also attribute footprint based on ownership and not on economic exposure. Therefore, Daniel should remain responsible for the emissions.

I guess you have already noticed that Daniel has hedged his risk using a short position in a forward.1 Consequently, Carola has a long position in the same forward. My story above actually implies that financial derivatives should not have any carbon footprint, as holders of derivatives do not ‘own’ a company. 

Danger of greenwashing

Not assigning footprints to derivatives could lead to greenwashing. For instance, the economic exposure of an oil and gas company stock can easily be replicated by a cash position plus a futures position.2  Holding the stock would then result in a high carbon footprint from an energy company, while the replication would result in a low footprint from the cash deposited at a financial company. 

Conversely, assigning footprints to derivatives could also enable greenwashing opportunities. Given the large differences in carbon footprint of some large oil giants, almost market neutral long-short futures positions with a large negative carbon exposure can easily be constructed.3  

Thus, from a fundamental perspective, derivatives should not have a footprint. However, clear legislation and guidance should be developed on the use of derivatives for green labels to avoid greenwashing. 

1As the interest rate is around zero at the moment we can ignore that component
2Similar logic can be applied to other derivatives (for instance treasury + CDS = corporate bond).
3Short positions in futures should have a negative footprint, otherwise total global emissions become enormous.

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