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How does investor sentiment impact stock volatility? New evidence from Shanghai A-shares market

Dejun Xie (Xi'an Jiaotong-Liverpool University, Suzhou, China)
Yu Cui (Xi'an Jiaotong-Liverpool University, Suzhou, China)
Yujian Liu (Xi'an Jiaotong-Liverpool University, Suzhou, China)

China Finance Review International

ISSN: 2044-1398

Article publication date: 24 May 2021

274

Abstract

Purpose

The focus of the current research is to examine whether mixed-frequency investor sentiment affects stock volatility in the China A-shares stock market.

Design/methodology/approach

Mixed-frequency sampling models are employed to find the relationship between stock market volatility and mixed-frequency investor sentiment. Principal analysis and MIDAS-GARCH model are used to calibrate the impact of investor sentiment on the large-horizon components of volatility of Shanghai composite stocks.

Findings

The results show that the volatility in Chinese stock market is positively influenced by BW investor sentiment index, when the sentiment index encompasses weighted mixed frequencies with different horizons. In particular, the impact of mixed-frequency investor sentiment is most significantly on the large-horizon components of volatility. Moreover, it is demonstrated that mixed-frequency sampling model has better explanatory powers than exogenous regression models when accounting for the relationship between investor sentiment and stock volatility.

Practical implications

Given the various unique features of Chinese stock market and its importance as the major representative of world emerging markets, the findings of the current paper are of particularly scholarly and practical significance by shedding lights to the applicableness GARCH-MIDAS in the focused frontiers.

Originality/value

A more accurate and insightful understanding of volatility has always been one of the core scholarly pursuits since the influential structural time series modeling of Engle (1982) and the seminal work of Engle and Rangel (2008) attempting to accommodate macroeconomic factors into volatility models. However, the studies in this regard are so far relatively scarce with mixed conclusions. The current study fills such gaps with improved MIDAS-GARCH approach and new evidence from Shanghai A-share market.

Keywords

Citation

Xie, D., Cui, Y. and Liu, Y. (2021), "How does investor sentiment impact stock volatility? New evidence from Shanghai A-shares market", China Finance Review International, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/CFRI-01-2021-0007

Publisher

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Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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