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Are Spot Freight Rates Stationary?

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  • Steen Koekebakker
  • Roar Adland
  • Sigbjørn Sødal

Abstract

In the recent literature, empirical tests of stationarity of freight rates often conclude that spot freight rates are non-stationary processes. However, many maritime economists would argue that the freight rate cannot exhibit asymptotically explosive behaviour, as implied by non-stationarity, in a perfectly competitive freight market. This paper restates the theoretical arguments behind mean reversion and boundedness of the spot freight rate process and suggests that the failure to reject non-stationarity may be due to the weak power of the tests most frequently used. We employ a non-linear version of the Augmented Dickey-Fuller (ADF) test, based on an exponentially smooth-transition autoregressive model (ESTAR). This test enhances the power against mean-reverting nonlinear alternative hypotheses compared to the linear alternative for traditional ADF tests. Our empirical results show, in line with maritime economic theory, that freight rates in both dry-bulk and tanker markets are non-linear stationary. © 2006 LSE and the University of Bath

Suggested Citation

  • Steen Koekebakker & Roar Adland & Sigbjørn Sødal, 2006. "Are Spot Freight Rates Stationary?," Journal of Transport Economics and Policy, University of Bath, vol. 40(3), pages 449-472, September.
    • Handle: RePEc:tpe:jtecpo:v:40:y:2006:i:3:p:449-472
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    Cited by:

    1. Alizadeh, Amir H. & Huang, Chih-Yueh & van Dellen, Stefan, 2015. "A regime switching approach for hedging tanker shipping freight rates," Energy Economics, Elsevier, vol. 49(C), pages 44-59.
    2. Xin Wang & Stein W. Wallace, 2016. "Stochastic scheduled service network design in the presence of a spot market for excess capacity," EURO Journal on Transportation and Logistics, Springer;EURO - The Association of European Operational Research Societies, vol. 5(4), pages 393-413, December.
    3. Adland, Roar & Prochazka, Vit, 2021. "The value of timecharter optionality in the drybulk market," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 145(C).
    4. Fotis Papailias & Dimitrios D. Thomakos & Jiadong Liu, 2017. "The Baltic Dry Index: cyclicalities, forecasting and hedging strategies," Empirical Economics, Springer, vol. 52(1), pages 255-282, February.
    5. Roar Adland & Pierre Cariou & François-Charles Wolff, 2018. "Comparing transaction-based and expert-generated price indices in the market for offshore support vessels," Working Papers halshs-01843720, HAL.
    6. Sigbjørn Sødal & Steen Koekebakker & Roar Aadland, 2008. "Market switching in shipping — A real option model applied to the valuation of combination carriers," Review of Financial Economics, John Wiley & Sons, vol. 17(3), pages 183-203, August.
    7. Roar Adland & Haakon Ameln & Eirik A. Børnes, 2020. "Hedging ship price risk using freight derivatives in the drybulk market," Journal of Shipping and Trade, Springer, vol. 5(1), pages 1-18, December.
    8. Javier Población & Gregorio Serna, 2018. "A common long-term trend for bulk shipping prices," Maritime Economics & Logistics, Palgrave Macmillan;International Association of Maritime Economists (IAME), vol. 20(3), pages 421-432, September.
    9. Prochazka, Vit & Adland, Roar & Wallace, Stein W., 2019. "The value of foresight in the drybulk freight market," Transportation Research Part A: Policy and Practice, Elsevier, vol. 129(C), pages 232-245.
    10. Okan Duru, 2017. "The Origin and Consistency of the Ton–Mile Metric in the Shipping Economics," Logistics, MDPI, vol. 1(1), pages 1-8, February.
    11. Sødal, Sigbjørn & Koekebakker, Steen & Aadland, Roar, 2008. "Market switching in shipping -- A real option model applied to the valuation of combination carriers," Review of Financial Economics, Elsevier, vol. 17(3), pages 183-203, August.
    12. Spyros Makridakis & Andreas Merikas & Anna Merika & Mike G. Tsionas & Marwan Izzeldin, 2020. "A novel forecasting model for the Baltic dry index utilizing optimal squeezing," Journal of Forecasting, John Wiley & Sons, Ltd., vol. 39(1), pages 56-68, January.
    13. Koichiro Hayashi, 2020. "Stationarity of spot freight rates considering supply/demand effect," Journal of Shipping and Trade, Springer, vol. 5(1), pages 1-9, December.
    14. Adland, Roar & Jia, Haiying & Lu, Jing, 2008. "Price dynamics in the market for Liquid Petroleum Gas transport," Energy Economics, Elsevier, vol. 30(3), pages 818-828, May.
    15. Kou, Ying & Luo, Meifeng, 2018. "Market driven ship investment decision using the real option approach," Transportation Research Part A: Policy and Practice, Elsevier, vol. 118(C), pages 714-729.
    16. Nwokedi, Theophilus Chinonyerem & Odumodu Chigozie Uzoma & Hilary, Owoidighe Efanga & Maduabuchukwu Chukwuemeka Donason & Olusegu, Sodiq Buhari, 2019. "Ship Sales and Purchases Market: Modeling the Influences of Seaborne Trade and Charter Rates/Freight on Dead Weight Tonnage of Global new Building Orders," International Journal of Science and Business, IJSAB International, vol. 3(2), pages 1-10.
    17. Javier Población, 2017. "Are recent tanker freight rates stationary?," Maritime Economics & Logistics, Palgrave Macmillan;International Association of Maritime Economists (IAME), vol. 19(4), pages 650-666, December.

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