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Can green finance weather the Trump storm?

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Peter Tankov
Professor of Quantitative Finance at ENSAE (IP Paris)
David Zerbib
Olivier David Zerbib
Researcher at CREST and Assistant Professor at ENSAE (IP Paris)
Key takeaways
  • Green finance, understood as the allocation of capital for the environmental transition, is being called into question for political motives.
  • In addition, the funding allocated to the transition falls far short of what is needed to keep global temperatures within acceptable limits.
  • Beyond necessary government interventions, promoting training, information sharing, investor coalitions, and open access to environmental data would help engage a wide range of actors in sustainable finance and strengthen support for the ecological transition.
  • Academic research highlights the growing environmental risks, the financial relevance of which could help convince hesitant investors and public authorities, while moving beyond the notion of ESG to focus more on impact investing.

Green finance, defined as the allo­ca­tion of cap­i­tal to sup­port the eco­log­i­cal tran­si­tion, is under­go­ing a tur­bu­lent peri­od. It is being called into ques­tion for polit­i­cal rea­sons, par­tic­u­lar­ly since Don­ald Trump’s return to pow­er in ear­ly 2025, and because it has become less prof­itable since the ener­gy shock and the rise in inter­est rates fol­low­ing the war in Ukraine. Yet, there is a com­pelling need for finance to go green: among oth­er things, the cli­mate emer­gency is inten­si­fy­ing, and the need for financ­ing to lim­it glob­al warm­ing to a rea­son­able lev­el remains sig­nif­i­cant. There are rea­sons for hope, how­ev­er: recent research in green finance has giv­en us a bet­ter under­stand­ing of the mech­a­nisms investors can use to pres­sure com­pa­nies to go green and has iden­ti­fied tools that could sig­nif­i­cant­ly bend the emis­sions curve. Nev­er­the­less, this will require a strong and con­cert­ed effort from civ­il soci­ety, acad­e­mia, and green investors, who will need to play a greater role to com­pen­sate for the lack of ambi­tion dis­played by pub­lic authorities.

A US-led backlash against a backdrop of unfavourable global macro-political conditions

Since Don­ald Trump’s first pres­i­den­tial term, invest­ment incor­po­rat­ing envi­ron­men­tal, social, and gov­er­nance (ESG) cri­te­ria has been at the heart of polit­i­cal debates in the Unit­ed States. Some US politi­cians, such as Florida’s Repub­li­can gov­er­nor Ron DeSan­tis, described these prac­tices as “woke invest­ment,” that is, polit­i­cal­ly moti­vat­ed ini­tia­tives that are deemed exces­sive­ly pro­gres­sive. Over the past few years, states such as Texas and Flori­da have restrict­ed the use of ESG cri­te­ria in the man­age­ment of pub­lic funds. In addi­tion, fol­low­ing mas­sive with­drawals of pub­lic cap­i­tal from their ESG funds, sev­er­al major US asset man­agers have rel­e­gat­ed ESG con­sid­er­a­tions to the back­ground to lim­it polit­i­cal and rep­u­ta­tion­al risks. As a result, faced with polit­i­cal pres­sure in the Unit­ed States and threats of defec­tion from US finan­cial organ­i­sa­tions, the Net Zero alliances of finan­cial insti­tu­tions (NZIA, GFANZ, NZAM) have been dis­solved, have announced a down­ward revi­sion, or even the removal of their cli­mate targets.

Don­ald Trump’s return to the White House in 2025 has cement­ed this back­lash in reg­u­la­tion. For exam­ple, the Secu­ri­ties and Exchange Com­mis­sion (SEC) has stopped defend­ing its Cli­mate Dis­clo­sure rule, and the US Depart­ment of Labor is con­sid­er­ing repeal­ing the Invest­ment Duties rule, which allowed pen­sion funds to use ESG cri­te­ria. In terms of cor­po­rate gov­er­nance, the SEC has rein­stat­ed very per­mis­sive stan­dards for reject­ing share­hold­er res­o­lu­tions on cli­mate issues. With regard to the devel­op­ment of “green” infra­struc­ture, sub­si­dies for projects con­tribut­ing to green­house gas reduc­tion have been can­celled, and new wind tur­bine per­mits have been suspended.

This polit­i­cal back­lash in the US is com­pound­ed by an unfavourable glob­al macro-finan­cial envi­ron­ment. The eco­nom­ic slow­down, com­bined with per­sis­tent infla­tion fuelled by high­er tar­iffs, has brought many ener­gy tran­si­tion invest­ment projects to a halt. Fur­ther­more, the increase in armed con­flicts and the expan­sion­ist ambi­tions of cer­tain coun­tries are ham­per­ing the devel­op­ment of green finance, which is suf­fer­ing from increased mil­i­tary spend­ing and reduced coop­er­a­tion between coun­tries. As a result, faced with declin­ing returns on ESG assets, some investors have turned away from green invest­ing in search of finan­cial performance.

Inherent obstacles to the development of green finance

In addi­tion, the prac­tice of envi­ron­men­tal finance has not yet reached matu­ri­ty. As far as investors are con­cerned, although aca­d­e­m­ic research is start­ing to pro­vide a good under­stand­ing of impact invest­ment mech­a­nisms, the range of funds offer­ing this type of invest­ment remains insuf­fi­cient­ly devel­oped com­pared with the offer of tra­di­tion­al “green funds,” and impact mea­sure­ment indi­ca­tors are not stan­dard­ised, par­tic­u­lar­ly with regard to non-cli­mate impacts on nature.

More­over, reg­u­la­to­ry frame­works are frag­ment­ed and still under devel­op­ment in most coun­tries. In some cas­es, they are even being revised to make them less restric­tive (see, in par­tic­u­lar, the EU Omnibus Act, which aims to reduce the ambi­tions of the Cor­po­rate Sus­tain­abil­i­ty Report­ing Direc­tive [CSRD]), due to fears of incom­pat­i­bil­i­ty between the socio-envi­ron­men­tal objec­tives of sus­tain­able finance and the per­ceived or real risks of los­ing com­pet­i­tive­ness. This lack of ambi­tion is also reflect­ed in pub­lic poli­cies where, for exam­ple, sup­port for the eco­log­i­cal tran­si­tion still coex­ists with fos­sil fuel sub­si­dies in many countries.

As for civ­il soci­ety, it is still insuf­fi­cient­ly involved in sup­port­ing sus­tain­able invest­ment. This is due to a lack of infor­ma­tion on the pres­sures exert­ed by human activ­i­ty on cli­mate and bio­log­i­cal equi­lib­ria, and on the levers for action that sus­tain­able finance could offer. Addi­tion­al­ly, green­wash­ing by many com­pa­nies, albeit to vary­ing degrees, is under­min­ing investor con­fi­dence and commitment.

As a result, the fund­ing allo­cat­ed to the tran­si­tion is still well below the lev­el need­ed to keep glob­al tem­per­a­tures at a rea­son­able lev­el, par­tic­u­lar­ly in emerg­ing coun­tries. Accord­ing to the Cli­mate Pol­i­cy Ini­tia­tive, annu­al cli­mate finance flows would need to increase five­fold by 2030 – from $1.46 tril­lion to $7.4 tril­lion – to stay on track for a 1.5°C glob­al tem­per­a­ture rise.

Positive signs and reasons for hope

Yet, there are good rea­sons to keep hope alive, as the glob­al momen­tum for sus­tain­able finance and devel­op­ments in research on this top­ic are favourable. Indeed, green invest­ing is gain­ing momen­tum and acquir­ing inno­v­a­tive tools. In 2024, it account­ed for $2 tril­lion, twice as much as invest­ments in fos­sil fuels1, con­tribut­ing to the deep­en­ing of green mar­kets (e.g., the stock of green and sus­tain­able bonds account­ed for $5.4 tril­lion in Q3 20242). In terms of pric­ing, com­pa­nies with the largest envi­ron­men­tal foot­prints finance their debt at a high­er cost than the oth­ers via a “brown pre­mi­um3.” In addi­tion, col­lec­tive ini­tia­tives con­tin­ue to flour­ish: for exam­ple, the Just Ener­gy Tran­si­tion Part­ner­ships are expand­ing (e.g., in Sene­gal with €2.5 bil­lion) and cre­at­ing a blend­ed finance mod­el to phase out coal in emerg­ing mar­kets4. All this is rein­forced by the devel­op­ment of tran­si­tion plans to assess com­pa­nies’ align­ment with the Paris Agree­ment tar­gets. In 2023, one in four com­pa­nies assessed by the Car­bon Dis­clo­sure Project had a tran­si­tion plan com­pat­i­ble with a 1.5°C sce­nario, up 44% from the pre­vi­ous year5.

The favourable momen­tum of green finance is also observed in the indus­tri­al sec­tor. Sev­er­al indus­tries are green­ing quick­ly: for exam­ple, in the trans­port indus­try, more than one in five cars sold in 2024 was elec­tric6, up 25% from the pre­vi­ous year7. In addi­tion, inno­va­tion in green tech­nol­o­gy is accel­er­at­ing: for exam­ple, the cost of a bat­tery pack fell by 20% between 2023 and 2024, open­ing up promis­ing prospects for mas­sive devel­op­ment of ener­gy stor­age8.

Final­ly, from a research per­spec­tive, sig­nif­i­cant progress is being made in under­stand­ing the mech­a­nisms through which investors can incen­tivise com­pa­nies to become green­er. In terms of ESG invest­ment screens, sev­er­al recent stud­ies9 show how nec­es­sary it is to build a port­fo­lio that takes into account the exter­nal­i­ties and financ­ing needs of all com­pa­nies in the econ­o­my – not just those in the invest­ment port­fo­lio – to max­imise the addi­tion­al­i­ty of the invest­ment rel­a­tive to a coun­ter­fac­tu­al state. More­over, the sig­nif­i­cant ben­e­fits of share­hold­er engage­ment have been doc­u­ment­ed by sev­er­al ear­ly empir­i­cal works10.

Levers for action by governments, society, and researchers

So, what levers can be used to har­ness finance for an ambi­tious eco­log­i­cal tran­si­tion in this chaot­ic envi­ron­ment? Ide­al­ly, gov­ern­ments should rein­force the favourable dynam­ics of green invest­ment by, among oth­ers: strength­en­ing fund­ing from pub­lic agen­cies and mul­ti­lat­er­al devel­op­ment banks to increase the num­ber of projects financed, there­by increas­ing the sup­ply of green finan­cial assets; sup­port­ing blend­ed finance projects to reduce the cost of cap­i­tal for com­pa­nies con­tribut­ing to the eco­log­i­cal tran­si­tion and catal­yse an increase in pri­vate invest­ment; mak­ing the com­mit­ments made under the Net Zero alliances legal­ly bind­ing; har­mon­is­ing stan­dards and tax­onomies on an inter­na­tion­al scale; com­bat­ing green­wash­ing (through the devel­op­ment of labels, rein­forced mon­i­tor­ing, and even the intro­duc­tion of legal lia­bil­i­ty); sup­port­ing green R&D; and repeal­ing fos­sil fuel sub­sidy policies.

How­ev­er, the polit­i­cal and geopo­lit­i­cal envi­ron­ments lead us to acknowl­edge that these ambi­tious bind­ing mea­sures are unlike­ly to be imple­ment­ed in the near future. In this con­text, what room for manoeu­vre do civ­il soci­ety, busi­ness­es, and investors have to com­pen­sate for gov­ern­ment inaction?

A first lever for action is to enable as many play­ers as pos­si­ble (uni­ver­si­ties, com­pa­nies, munic­i­pal­i­ties, admin­is­tra­tions, asso­ci­a­tions, etc.) to devel­op train­ing and aware­ness-rais­ing pro­grammes on envi­ron­men­tal issues and the avail­able sus­tain­able finance instru­ments. Sup­port should also be giv­en to the devel­op­ment of ini­tia­tives pro­mot­ing investor coali­tions. This could strength­en share­hold­er activism on envi­ron­men­tal issues and ini­tia­tives to dis­sem­i­nate infor­ma­tion wide­ly to stake­hold­ers. Fur­ther­more, the devel­op­ment of free, open-source data plat­forms on com­pa­nies’ envi­ron­men­tal foot­prints would give retail and small insti­tu­tion­al investors easy access to key met­rics. In addi­tion, sup­port for the eco­log­i­cal tran­si­tion, which includes increas­ing the num­ber of impact funds offered by asset man­agers, would also ben­e­fit from the rise of envi­ron­men­tal­ly-focused crowd­fund­ing platforms.

Final­ly, aca­d­e­m­ic research has an impor­tant role to play. It is essen­tial to sup­port researchers and research projects on envi­ron­men­tal issues whose activ­i­ties are com­pro­mised in their home coun­try. Empha­sis­ing envi­ron­men­tal risks, which are becom­ing increas­ing­ly threat­en­ing, and whose finan­cial mate­ri­al­i­ty is not in ques­tion, could enable green finance to regain the con­fi­dence of the most reluc­tant investors and pub­lic author­i­ties. How­ev­er, beyond these unde­ni­able risks, research needs to fur­ther analyse the con­di­tions under which invest­ment can most effec­tive­ly sup­port the eco­log­i­cal tran­si­tion. In par­tic­u­lar, the focus should shift from ESG invest­ing to impact invest­ing, as ESG is a con­cept that encom­pass­es het­ero­ge­neous and some­times con­tra­dic­to­ry dimen­sions, expos­ing it to crit­i­cism and facil­i­tat­ing green­wash­ing prac­tices. This is all the more impor­tant giv­en that the com­mon ESG strate­gies are not the most effec­tive in spurring com­pa­nies to green their busi­ness models.

Conclusion

At the dawn of Don­ald Trump’s sec­ond term, green finance is stalling polit­i­cal­ly and fac­ing sys­temic chal­lenges. Yet, recent advances in both tech­nol­o­gy and acad­e­mia offer grounds for opti­mism. By mobil­is­ing researchers, investors, and civ­il soci­ety, it is still pos­si­ble to har­ness finance to achieve a path com­pat­i­ble with ambi­tious cli­mate objec­tives. While the urgency is obvi­ous, the instru­ments are avail­able. What is need­ed now is the polit­i­cal and col­lec­tive will to mobilise them!

Ref­er­ences:

  • Bolton, P., Kacper­czyk, M. T., 2021. Do investors care about car­bon risk? Jour­nal of Finan­cial Eco­nom­ics 142, 517–549.
  • Green, D., Roth, B., 2024. The allo­ca­tion of social­ly respon­si­ble cap­i­tal. Jour­nal of Finance, Forth­com­ing Paper.
  • Heeb, F., Köl­bel, J., 2024. The impact of cli­mate engage­ment: A field exper­i­ment. Work­ing Paper.
  • Hsu, P., Li, K., Tsou, C., 2023. The Pol­lu­tion Pre­mi­um. Jour­nal of Finance 78, 1343–1392.
  • Oehmke, M., Opp, M. M., 2025. A The­o­ry of Social­ly Respon­si­ble Invest­ment. The Review of Eco­nom­ic Stud­ies 92, 1193–1225.
  • van der Kroft, B., Pala­cios, J., Rigob­on, R., Zheng, S., 2025. Tim­ing sus­tain­able share­hold­er pro­pos­als in real asset invest­ments. Work­ing Paper.
  • Zer­bib, O. D., 2022. A Sus­tain­able Cap­i­tal Asset Pric­ing Mod­el (S‑CAPM): Evi­dence from Envi­ron­men­tal Inte­gra­tion and Sin Stock Exclu­sion. Review of Finance 26, 1345–1388.
1https://​www​.iea​.org/​n​e​w​s​/​i​n​v​e​s​t​m​e​n​t​-​i​n​-​c​l​e​a​n​-​e​n​e​r​g​y​-​t​h​i​s​-​y​e​a​r​-​i​s​-​s​e​t​-​t​o​-​b​e​-​t​w​i​c​e​-​t​h​e​-​a​m​o​u​n​t​-​g​o​i​n​g​-​t​o​-​f​o​s​s​i​l​-​fuels
2https://​www​.cli​mate​bonds​.net/​r​e​s​o​u​r​c​e​s​/​p​r​e​s​s​-​r​e​l​e​a​s​e​s​/​2​0​2​4​/​1​1​/​g​l​o​b​a​l​-​g​s​s​-​m​a​r​k​e​t​-​s​u​r​g​e​s​-​u​s​d​-​5​4​-​t​r​i​l​l​i​on-q3
3Bolton and Kacper­czyk, 2021; Zer­bib, 2022; Hsu, Li, and Tsou, 2023
4https://​www​.ener​gy​pol​i​cy​.colum​bia​.edu/​p​u​b​l​i​c​a​t​i​o​n​s​/​r​e​a​l​i​z​i​n​g​-​t​h​e​-​p​o​t​e​n​t​i​a​l​-​o​f​-​j​u​s​t​-​e​n​e​r​g​y​-​t​r​a​n​s​i​t​i​o​n​-​p​a​r​t​n​e​r​s​h​i​p​s​-​i​n​-​t​h​e​-​c​u​r​r​e​n​t​-​g​e​o​p​o​l​i​t​i​c​a​l​-​e​n​v​i​r​o​n​ment/
5https://​www​.cdp​.net/​e​n​/​c​l​i​m​a​t​e​-​t​r​a​n​s​i​t​i​o​n​-​plans
6https://​www​.iea​.org/​r​e​p​o​r​t​s​/​g​l​o​b​a​l​-​e​v​-​o​u​t​l​o​o​k​-​2​0​2​4​/​e​x​e​c​u​t​i​v​e​-​s​u​mmary
7https://​rho​mo​tion​.com/​n​e​w​s​/​o​v​e​r​-​1​7​-​m​i​l​l​i​o​n​-​e​v​s​-​s​o​l​d​-​i​n​-​2​0​2​4​-​r​e​c​o​r​d​-​year/
8https://​about​.bnef​.com/​b​l​o​g​/​l​i​t​h​i​u​m​-​i​o​n​-​b​a​t​t​e​r​y​-​p​a​c​k​-​p​r​i​c​e​s​-​s​e​e​-​l​a​r​g​e​s​t​-​d​r​o​p​-​s​i​n​c​e​-​2​0​1​7​-​f​a​l​l​i​n​g​-​t​o​-​1​1​5​-​p​e​r​-​k​i​l​o​w​a​t​t​-​h​o​u​r​-​b​l​o​o​m​b​e​r​gnef/
9https://​www​.iea​.org/​n​e​w​s​/​i​n​v​e​s​t​m​e​n​t​-​i​n​-​c​l​e​a​n​-​e​n​e​r​g​y​-​t​h​i​s​-​y​e​a​r​-​i​s​-​s​e​t​-​t​o​-​b​e​-​t​w​i​c​e​-​t​h​e​-​a​m​o​u​n​t​-​g​o​i​n​g​-​t​o​-​f​o​s​s​i​l​-​fuels
10https://​www​.cli​mate​bonds​.net/​r​e​s​o​u​r​c​e​s​/​p​r​e​s​s​-​r​e​l​e​a​s​e​s​/​2​0​2​4​/​1​1​/​g​l​o​b​a​l​-​g​s​s​-​m​a​r​k​e​t​-​s​u​r​g​e​s​-​u​s​d​-​5​4​-​t​r​i​l​l​i​on-q3

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