Tail Dependence Between US and Chinese Technology Stocks Under Policy and Technological Shocks

Shuchang Liu

doi:10.47297/wspceWSP2516-251911.20250903

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Tail Dependence Between US and Chinese Technology Stocks Under Policy and Technological Shocks

9卷第3期

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Tail Dependence Between US and Chinese Technology Stocks Under Policy and Technological Shocks
Tail Dependence Between US and Chinese Technology Stocks Under Policy and Technological Shocks
Jinan University, Guangzhou, Guangdong, 511443, China
2025年9卷第3期页码：56-62
纸质出版日期：2025-06-30
DOI：10.47297/wspceWSP2516-251911.20250903
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(2025). Tail Dependence Between US and Chinese Technology Stocks Under Policy and Technological Shocks. 创意经济（英文版）, 9(3), 56-62.

Liu Shuchang.Tail Dependence Between US and Chinese Technology Stocks Under Policy and Technological Shocks[J].Creative Economy,2025,09(03):56-62.
(2025). Tail Dependence Between US and Chinese Technology Stocks Under Policy and Technological Shocks. 创意经济（英文版）, 9(3), 56-62. DOI： 10.47297/wspceWSP2516-251911.20250903.

Liu Shuchang.Tail Dependence Between US and Chinese Technology Stocks Under Policy and Technological Shocks[J].Creative Economy,2025,09(03):56-62. DOI： 10.47297/wspceWSP2516-251911.20250903.

摘要

Abstract

The financial market is a complex and interconnected system

and the correlation between the U.S. and Chinese stock markets has long been a focal point in financial research. However

limited attention has been paid specifically to the technology sector. This paper selects the Hang Seng TECH Index and the NASDAQ Composite Index as the representative benchmarks for the Chinese and U.S. technology markets. We first model the marginal distributions of return series using the t-GARCH(1

1) framework and compute constant upper and lower tail dependence coefficients. Then

we estimate the parameters of the SJC Copula using a two-step estimation procedure. Finally

we conduct independent and synergistic effect tests to examine how the two events influence the tail dependence structure between the two markets. The results reveal asymmetric and time-varying tail dependence dynamics

with the policy shock inducing a sustained increase and the technological shock triggering a short-lived spike in extreme market co-movements.

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Keywords

references

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