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Correlation analysis of port congestion and CCFI fluctuations on the China-US Export container route
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Nan ZHAO1, Li SHEN2, Tiaolan YU2
Navigation of China | 2025, 48(1) : 93 - 100
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Navigation of China | 2025, 48(1): 93-100
• Port and Waterway Engineering •
Correlation analysis of port congestion and CCFI fluctuations on the China-US Export container route
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Nan ZHAO1, Li SHEN2, Tiaolan YU2
Affiliations
  • 1.Shanghai International Shipping Institute, Shanghai Maritime University, Shanghai 201306, China
  • 2.College of Transport and Communications, Shanghai Maritime University, Shanghai 201306, China
Published: 2025-03-25 doi: 10.3969/j.issn.1000-4653.2025.01.012
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A Vector Auto Regression (VAR) model is constructed by combining the China Containerized Freight Index of E/C America Service (CCFI E/C America Service) and the China Containerized Freight Index of W/C America Service (CCFI W/C America Service) with the Clarksons Container ship Port Congestion Index (CPCI) from January 2018 to February 2023, to quantitatively analyze the impact mechanism of port congestion on container freight rates. The model also incorporates a Vector Error Correction (VEC) model to study the long-run equilibrium relationship between the variables. The results show that: 1) Port congestion leads to the occupation of container capacity and port resources, as well as changes in the distribution of capacity and transportation strategies on the China-U.S. export container routes, which in turn causes different degrees of fluctuations in CCFI on the sub-routes; 2) The effect of port congestion on container freight rates persists for nearly three months; 3) Regardless of the U.S. East route or the U.S. West route, port congestion in the U.S. has a more significant impact on promoting the increase of the container freight index compared to port congestion in China. Meanwhile, this paper provides a new perspective for predicting CCFI by investigating the impact mechanism of port congestion on CCFI fluctuations.

port congestion  /  China containerized freight index  /  VAR model  /  impulse response
Nan ZHAO, Li SHEN, Tiaolan YU. Correlation analysis of port congestion and CCFI fluctuations on the China-US Export container route[J]. Navigation of China, 2025 , 48 (1) : 93 -100 . DOI: 10.3969/j.issn.1000-4653.2025.01.012
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Article Info
doi: 10.3969/j.issn.1000-4653.2025.01.012
  • Receive Date：2023-12-14
  • Online Date：2026-03-17
  • Published：2025-03-25
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  • Received：2023-12-14
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Affiliations
    1.Shanghai International Shipping Institute, Shanghai Maritime University, Shanghai 201306, China
    2.College of Transport and Communications, Shanghai Maritime University, Shanghai 201306, China
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光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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