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Understanding the dynamical instability of financial markets using network analysis

Research Project

Project/Area Number 19H01506
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 07060:Money and finance-related
Research InstitutionKobe University

Principal Investigator

Teruyoshi Kobayashi  神戸大学, 経済学研究科, 教授 (10387607)

Co-Investigator(Kenkyū-buntansha) 川本 達郎  国立研究開発法人産業技術総合研究所, 情報・人間工学領域, 研究員 (10791444)
翁長 朝功  東北大学, 学際科学フロンティア研究所, 助教 (90823922)
近江 崇宏  東京大学, 生産技術研究所, 特任准教授 (90726134)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Keywords金融ネットワーク / 拡散 / 金融危機 / カスケード / 社会ネットワーク / ネットワーク・ゲーム / 順序局所性 / 閾値モデル / システミックリスク / ネットワーク / 金融市場 / テンポラル・ネットワーク / スケーリング / 資産価格 / 動的不安定性 / システミック・リスク / 銀行間取引
Outline of Research at the Start

金融市場では銀行同士の取引などによって様々な「つながり」が形成され、そのネットワークを通じて複雑な波及現象が発生する。本研究では、従来の経済学的手法では分析が難しい金融市場に内在するネットワークの構造に焦点をあて、様々な金融危機現象をネットワーク現象としてモデル化し、動的な不安定性条件を導出することで、金融危機波及メカニズムの本質的な理解を目指す。例えば、金融機関のポートフォリオ相関をネットワークとして数理モデル化し、投げ売りの発生条件を解析的に示す。また、Hawkes過程をベースとした最新の統計的解析手法を用いて、理論・データの両面から金融危機の発生メカニズムに迫る。

Outline of Final Research Achievements

Economic agents such as individuals, firms, and banks constitute complex networks through social ties such as friendships and economic ties such as economic transactions. Such networks are socially desirable in normal times because they enhance the efficiency of information transmission and transactions. However, adverse effects can also propagate through these networks at the same time, such as bank failures and chains of asset sales. In this project, we developed mathematical models that explain cascades of information and bank failures through complex social and economic networks, and clarified the conditions under which such cascading failures occur.

Academic Significance and Societal Importance of the Research Achievements

近年の社会・経済システムは急速に複雑化・グローバル化が進み、局所的なイベントが世界中に伝播し、世界的な現象となることが頻繁に起こる。今回のプロジェクトのテーマである金融危機は、金融市場におけるネットワークに内在する本質的な不安定性として考えられる。その意味で、簡略化した数理モデルでネットワーク上の拡散現象を理解することは、金融市場における金融危機の本質を理解することになり、どのような政策的対処が望ましいのかを議論するための基盤を提供するものである。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (19 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (5 results) Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 5 results) Presentation (7 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results) Remarks (2 results)

  • [Int'l Joint Research] UCL(英国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] State Univesity of New York at Buffalo(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Aix Marseille Univ(フランス)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] University of Southern California(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Aix Marseille Univ(フランス)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Risk of Cascading Bank Failures in Financial Systems2021

    • Author(s)
      小林 照義
    • Journal Title

      SYSTEMS, CONTROL AND INFORMATION

      Volume: 65 Issue: 5 Pages: 163-168

    • DOI

      10.11509/isciesci.65.5_163

    • NAID

      130008116375

    • ISSN
      0916-1600, 2424-1806
    • Year and Date
      2021-05-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Optimal irreversible monetary policy2021

    • Author(s)
      Kohei Hasui, Teruyoshi Kobayashi, and Tomohiro Sugo
    • Journal Title

      European Economic Review

      Volume: 134 Pages: 103707-103707

    • DOI

      10.1016/j.euroecorev.2021.103707

    • NAID

      120007002562

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The switching mechanisms of social network densification2021

    • Author(s)
      Kobayashi Teruyoshi、Genois Mathieu
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 3160-3160

    • DOI

      10.1038/s41598-021-82432-9

    • NAID

      120007002607

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Two types of densification scaling in the evolution of temporal networks2020

    • Author(s)
      Kobayashi Teruyoshi、Genois Mathieu
    • Journal Title

      Physical Review E

      Volume: 102 Issue: 5 Pages: 052302-052302

    • DOI

      10.1103/physreve.102.052302

    • NAID

      120006940245

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Introduction to the special issue “Economics and Complex Networks”2020

    • Author(s)
      Kobayashi Teruyoshi、Masuda Naoki
    • Journal Title

      The Japanese Economic Review

      Volume: 72 Issue: 1 Pages: 1-4

    • DOI

      10.1007/s42973-020-00062-8

    • NAID

      120007002606

    • Related Report
      2020 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Presentation] Statistical tests for adjacency-matrix reordering2022

    • Author(s)
      Tatsuro Kawamoto
    • Organizer
      NetSci-X 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Estimating the temporal dynamics of densification in human contact networks2022

    • Author(s)
      Shaunette Ferguson
    • Organizer
      NetSci-X 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Scaling relations reveal the switching dynamics of temporal networks2021

    • Author(s)
      Teruyoshi Kobayashi
    • Organizer
      CompleNet 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Diffusion dynamics on monoplex and multiplex networks2021

    • Author(s)
      Teruyoshi Kobayashi
    • Organizer
      日本経済学会 秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Two types of densification scaling in social and financial networks2020

    • Author(s)
      Teruyoshi Kobayashi
    • Organizer
      NetSci2020: satellite workshop "Complexity Meets Finance: Data,Methods and Policy Implications"
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Diurnal dynamics of financial systemic risk2020

    • Author(s)
      Shaunette Ferguson
    • Organizer
      NetSci-X 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fire sales as multistate contagion on bipartite networks2019

    • Author(s)
      Tomokatsu Onaga
    • Organizer
      Complex Networks 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Remarks] ホームページ

    • URL

      https://terukobayashi.wordpress.com/

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 研究代表者HP

    • URL

      https://terukobayashi.wordpress.com/

    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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