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Tax Incentives and the Cost of Sustainable Debt: Evidence from Thailand’s ESG Fund Policy

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  • Phanjarat Daengnimvikul
  • Kanis Saengchote

Abstract

We evaluate the pricing impact of Thailand’s Thai ESG Fund – a tax-incentivized retail program launched in 2023 Q4 – on the corporate bond market, separating primary-market issuance from secondary-market repricing. Using Thai corporate THB bonds issued from 2018 to 2024, we test two hypotheses. At issuance (H1), we compare ESG coupons with observationally similar non-ESG issues via propensity-score matching. The average pairwise coupon spread (ESG minus matched non-ESG) is -29 bps overall, -23 bps pre-policy, and -92 bps post-policy, yielding a post-pre difference of -69 bps (all statistically significant). In the secondary market (H2), we analyze seasoned bonds issued in or before 2023 Q3 and estimate a difference-in-differences regression with bond and quarter fixed effects, supplemented by an event study. The ESG×Post coefficient ranges from +31 to +42 bps, and event-time estimates show flat pre-trends with the ESG spread turning positive from two quarters and building to 49 bps by the fourth quarter. Together, the policy reduces funding costs for new ESG issues while raising required yields on older ESG bonds, consistent with demand concentrating in newly eligible, on-the-run ESG supply and a higher off-the-run liquidity premium.

Suggested Citation

  • Phanjarat Daengnimvikul & Kanis Saengchote, 2025. "Tax Incentives and the Cost of Sustainable Debt: Evidence from Thailand’s ESG Fund Policy," PIER Discussion Papers 241, Puey Ungphakorn Institute for Economic Research.
    • Handle: RePEc:pui:dpaper:241
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    References listed on IDEAS

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    1. Dimitri Vayanos & Jean‐Luc Vila, 2021. "A Preferred‐Habitat Model of the Term Structure of Interest Rates," Econometrica, Econometric Society, vol. 89(1), pages 77-112, January.
    2. Jean-Sébastien Fontaine & René Garcia, 2012. "Bond Liquidity Premia," The Review of Financial Studies, Society for Financial Studies, vol. 25(4), pages 1207-1254.
    3. Pástor, Ľuboš & Stambaugh, Robert F. & Taylor, Lucian A., 2021. "Sustainable investing in equilibrium," Journal of Financial Economics, Elsevier, vol. 142(2), pages 550-571.
    4. Jack Bao & Jun Pan & Jiang Wang, 2011. "The Illiquidity of Corporate Bonds," Journal of Finance, American Finance Association, vol. 66(3), pages 911-946, June.
    5. Roongkiat Ratanabanchuen & Kanis Saengchote, 2021. "Chasing returns with high-beta stocks: evidence from tax-privileged mutual funds in Thailand," Economics and Business Letters, Oviedo University Press, vol. 10(1), pages 37-44.
    6. Dick-Nielsen, Jens & Feldhütter, Peter & Lando, David, 2012. "Corporate bond liquidity before and after the onset of the subprime crisis," Journal of Financial Economics, Elsevier, vol. 103(3), pages 471-492.
    7. Caramichael, John & Rapp, Andreas C., 2024. "The green corporate bond issuance premium," Journal of Banking & Finance, Elsevier, vol. 162(C).
    8. Zerbib, Olivier David, 2019. "The effect of pro-environmental preferences on bond prices: Evidence from green bonds," Journal of Banking & Finance, Elsevier, vol. 98(C), pages 39-60.
    9. Koziol, Christian & Proelss, Juliane & Roßmann, Philipp & Schweizer, Denis, 2022. "The price of being green," Finance Research Letters, Elsevier, vol. 50(C).
    10. Fatica, Serena & Panzica, Roberto & Rancan, Michela, 2021. "The pricing of green bonds: Are financial institutions special?," Journal of Financial Stability, Elsevier, vol. 54(C).
    11. Tang, Dragon Yongjun & Zhang, Yupu, 2020. "Do shareholders benefit from green bonds?," Journal of Corporate Finance, Elsevier, vol. 61(C).
    12. Flammer, Caroline, 2021. "Corporate green bonds," Journal of Financial Economics, Elsevier, vol. 142(2), pages 499-516.
    13. Dimitri Vayanos & Jean‐Luc Vila, 2023. "Corrigendum: A Preferred‐Habitat Model of the Term Structure of Interest Rates," Econometrica, Econometric Society, vol. 91(3), pages 31-32, May.
    14. Kristin Ulrike Löffler & Aleksandar Petreski & Andreas Stephan, 2021. "Drivers of green bond issuance and new evidence on the “greenium”," Eurasian Economic Review, Springer;Eurasia Business and Economics Society, vol. 11(1), pages 1-24, March.
    15. Ratanabanchuen, Roongkiat & Saengchote, Kanis, 2020. "Institutional capital allocation and equity returns: Evidence from Thai mutual funds’ holdings," Finance Research Letters, Elsevier, vol. 32(C).
    16. Krishnamurthy, Arvind, 2002. "The bond/old-bond spread," Journal of Financial Economics, Elsevier, vol. 66(2-3), pages 463-506.
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    JEL classification:

    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G18 - Financial Economics - - General Financial Markets - - - Government Policy and Regulation
    • H25 - Public Economics - - Taxation, Subsidies, and Revenue - - - Business Taxes and Subsidies
    • G23 - Financial Economics - - Financial Institutions and Services - - - Non-bank Financial Institutions; Financial Instruments; Institutional Investors

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