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2023 Fiscal Year Final Research Report

The effect of economic policy uncertainty on Japanese economy

Research Project

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Project/Area Number 20H01499
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 07040:Economic policy-related
Research InstitutionNagasaki University

Principal Investigator

Moriyasu Hiroshi  長崎大学, 経済学部, 教授 (10304924)

Co-Investigator(Kenkyū-buntansha) 阿萬 弘行  関西学院大学, 商学部, 教授 (70346906)
内田 交謹  九州大学, 経済学研究院, 教授 (80305820)
本西 泰三  関西大学, 経済学部, 教授 (90315218)
Project Period (FY) 2020-04-01 – 2024-03-31
Keywords経済政策不確実性
Outline of Final Research Achievements

This study examines the impact of economic policy uncertainty (EPU) on stock market behavior, revealing a significant increase in stock price synchronicity as EPU rises. Concurrently, stock liquidity and commonality in liquidity tend to decrease. These findings suggest that heightened EPU prompts investors to favor broader market investments over individual stock analysis, making them more responsive to overall market movements rather than the performance of specific firms. Moreover, the increased EPU complicates future market predictions, exacerbating disparities in information processing abilities among investors. Consequently, this leads to diminished liquidity and reduced commonality in stock liquidity.

Free Research Field

計量ファイナンス

Academic Significance and Societal Importance of the Research Achievements

他国において検証されていた、経済政策不確実性と株価共通性の関係について、我が国においても整合的な結果が得られることを明らかにした。また、経済政策不確実性と株式流動性の共通性の関係を明らかにした研究は今まで存在せず、経済政策不確実性と金融市場の関係についての学術的貢献は大きいと考えられる。また、経済政策不確実性の水準が、企業のディスクロージャーと株価共通性、株式流動性の共通性の関係に影響を与えることを示し、企業のディスクロージャーのあり方についても新しい知見をもたらした。

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Published: 2025-01-30  

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