Proceedings of the 2025 3rd International Academic Conference on Management Innovation and Economic Development (MIED 2025)

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The Effect of News Media Dissemination Speed and Stockholder Sentiment Diffusion on Short-Term Stock Price Volatility

Authors
Yiming Xu1, *
1Qingdao University, Qingdao, Shandong, China
*Corresponding author. Email: elv1s77@outlook.com
Corresponding Author
Yiming Xu
Available Online 17 September 2025.
DOI
10.2991/978-94-6463-835-6_16How to use a DOI?
Keywords
News propagation velocity (NPV); Investor sentiment diffusion (ISD); High-frequency volatility; Emotion-information feedback
Abstract

This study quantifies how news propagation velocity (NPV) and investor sentiment diffusion (ISD) jointly drive short-term stock volatility. Using high-frequency social media data and vector autoregression modeling, we find: Firstly, NPV increases volatility by 0.19% per σ (15-min lag, p<0.01). Besides, ISD amplifies NPV effects by 21% (β=0.27, p<0.05), revealing an emotion-information feedback loop. Finally, Bull markets exhibit stronger NPV-ISD interactions (β=0.35 vs. 0.19 in bear markets). These findings support circuit breaker reforms and investor education frameworks.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2025 3rd International Academic Conference on Management Innovation and Economic Development (MIED 2025)
Series
Advances in Economics, Business and Management Research
Publication Date
17 September 2025
ISBN
978-94-6463-835-6
ISSN
2352-5428
DOI
10.2991/978-94-6463-835-6_16How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Yiming Xu
PY  - 2025
DA  - 2025/09/17
TI  - The Effect of News Media Dissemination Speed and Stockholder Sentiment Diffusion on Short-Term Stock Price Volatility
BT  - Proceedings of the 2025 3rd International Academic Conference on Management Innovation and Economic Development (MIED 2025)
PB  - Atlantis Press
SP  - 137
EP  - 143
SN  - 2352-5428
UR  - https://doi.org/10.2991/978-94-6463-835-6_16
DO  - 10.2991/978-94-6463-835-6_16
ID  - Xu2025
ER  -