Updated on 2026/11/05

写真a

 
YOSHIKAWA Daisuke
 
Organization
Faculty of Policy Studies Professor
Title
Professor
External link

Degree

  • 博士(経済学) ( 京都大学 )

Research Areas

  • Humanities & Social Sciences / Money and finance

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Social systems engineering

Papers

  • A note on ambiguity-adjusted asset pricing Reviewed

    Hideki Iwaki, Daisuke Yoshikawa

    MATHEMATICS AND FINANCIAL ECONOMICS   19 ( 3 )   485 - 506   2025.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11579-025-00389-z

    Web of Science

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  • Does ambiguity drive the disposition effect? Reviewed

    Hideki Iwaki, Daisuke Yoshikawa

    INTERNATIONAL REVIEW OF FINANCIAL ANALYSIS   98   2025.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.irfa.2024.103887

    Web of Science

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  • Is BTC Enough? A New Perspective on Cryptocurrency Price Formation Reviewed

    Daisuke Yoshikawa

    6TH ACM INTERNATIONAL CONFERENCE ON AI IN FINANCE, ICAIF 2025   718 - 726   2025

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1145/3768292.3770351

    Web of Science

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  • The Disposition Effect under the Reference Dependent Smooth Model of Ambiguity Reviewed

    Hideki Iwaki, Daisuke Yoshikawa

    Asia-Pacific Journal of Risk and Insurance   2021.9

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    Publishing type:Research paper (scientific journal)   Publisher:Walter de Gruyter {GmbH}  

    DOI: 10.1515/apjri-2020-0041

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  • A Survey of the Optimal Consumption-Investment Problem with Transaction Costs

    Yamazaki Akira, Yoshikawa Daisuke

    Journal of Innovation Management   18   141 - 159   2021.3

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Research Institute for Innovation Management of Hosei University  

    This article is a review paper on Merton’s portfolio problem with transaction costs. This problem has been of great interest to many researchers since it was first raised in the 1970s. After many years of trial and error and research progress, this article addresses the studies that have made the greatest contribution to solving the problem, in historical order. After a detailed description of the problem formulation, we focus on the ideas of analytical methods to solve the problem as well as the economic interpretation of optimal consumption and investment.

    DOI: 10.24677/riim.18.0_141

    CiNii Books

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    Other Link: https://ndlsearch.ndl.go.jp/books/R000000004-I031413050

  • An Entropic Approach for Pair Trading Reviewed

    Daisuke Yoshikawa

    ENTROPY   19 ( 7 )   2017.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/e19070320

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  • Analyzing Equilibrium in Incomplete Markets with Model Uncertainty Reviewed

    Daisuke Yoshikawa

    INTERNATIONAL REVIEW OF FINANCE   17 ( 2 )   235 - 262   2017.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/irfi.12119

    Web of Science

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  • A note on utility-based pricing in models with transaction costs Reviewed

    Mark H. A. Davis, Daisuke Yoshikawa

    MATHEMATICS AND FINANCIAL ECONOMICS   9 ( 3 )   231 - 245   2015.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11579-015-0143-7

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  • A note on utility-based pricing Reviewed

    Mark H. A. Davis, Daisuke Yoshikawa

    MATHEMATICS AND FINANCIAL ECONOMICS   9 ( 3 )   215 - 230   2015.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s11579-015-0142-8

    Web of Science

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  • An extension of CreditGrades model approach with Levy processes Reviewed

    Takaaki Ozeki, Yuji Umezawa, Akira Yamazaki, Daisuke Yoshikawa

    QUANTITATIVE FINANCE   11 ( 12 )   1825 - 1836   2011

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/14697681003777089

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  • Valuation of Residential Mortgage-Backed Securities with Proportional Hazard Model: <i>Cumulant Expansion Approach to Pricing RMBS</i> Reviewed

    Takaaki Ozeki, Yuji Umezawa, Akira Yamazaki, Daisuke Yoshikawa

    The Journal of Fixed Income   18 ( 4 )   62 - 77   2009.3

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    Publishing type:Research paper (scientific journal)   Publisher:With Intelligence LLC  

    DOI: 10.3905/jfi.2009.18.4.062

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  • 通貨先物オプション価格とヘッジ―MEMMを用いた試みとして― Reviewed

    吉川大介, 岩城秀樹, 中窪文男, 郷古浩道

    経営財務研究   26 ( 1・2 )   2 - 16   2006.12

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Books

MISC

  • A new method for statistical arbitrage using eigendecomposition and deep learning

    YOSHIKAWA Daisuke

    Proceedings of the Annual Conference of JSAI   JSAI2023   2N1GS1002 - 2N1GS1002   2023.7

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    Language:Japanese   Publisher:The Japanese Society for Artificial Intelligence  

    This study proposes a new method for constructing statistical arbitrage strategies. <i>Statistical arbitrage</i> is an investment strategy derived from arbitrage. Both strategies exploit distorted relationships between asset prices. However, they differ in that arbitrage assumes a deterministic adjustment of distortions between asset prices, whereas statistical arbitrage assumes a stochastic adjustment of distortions. Therefore, the critical issue for trading strategies that target statistical arbitrage is whether we can stably operate the statistical arbitrage strategy. However, methods based on cointegration tests, which have often been used in previous studies of statistical arbitrage, do not necessarily construct stable portfolios. The main objective of this study is to overcome such problems. Specifically, we attempt to find stable portfolio components with the help of eigenvalue decomposition and improve the profitability and stability of portfolios using standard deep learning architectures such as GRUs and CNNs. Through numerical simulations using a dataset of stocks listed in the S&P 500, we first demonstrate the superiority of our method over conventional methods based on cointegration tests. Then, we verify that the method's performance can be improved with the help of deep learning.

    DOI: 10.11517/pjsai.jsai2023.0_2n1gs1002

    J-GLOBAL

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  • Pairs trading with deep learning

    Daisuke Yoshikawa

    人工知能学会全国大会論文集   JSAI2020   3I1GS1301 - 3I1GS1301   2020

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  • An Equilibrium Approach to Indifference Pricing with Model Uncertainty

    Mark H.A. Davis, Daisuke Yoshikawa

    Recent Advances in Financial Engineering 2014   2016

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    Publisher:WORLD SCIENTIFIC  

    DOI: 10.1142/9789814730778_0002

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  • 非完備市場におけるマルチンゲール測度(その2)

    岩城 秀樹, 吉川 大介

    経済論叢   174 ( 5-6 )   16 - 32   2004.11

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  • 非完備市場におけるマルチンゲール測度(その1)

    岩城 秀樹, 吉川 大介

    経済論叢   174 ( 4 )   1 - 15   2004.10

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  • マルチンゲール法による最適消費/ポートフォリオ問題の解法

    岩城 秀樹, 吉川 大介

    経済論叢別冊「調査と研究」   27   1 - 18   2003.10

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Research Projects

  • A New Decision-Making Model under Ambiguity to Elucidate Finance Anomalies

    Grant number:24K04948  2024.4 - 2028.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

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    Grant amount:\4680000 ( Direct Cost: \3600000 、 Indirect Cost:\1080000 )

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  • ディスポジション効果が及ぼす社会的影響についての研究

    Grant number:24K07956  2024.4 - 2027.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    吉川 大介, 岩城 秀樹

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    Grant amount:\4550000 ( Direct Cost: \3500000 、 Indirect Cost:\1050000 )

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  • 景気に左右されない頑健な資産運用手法の構築

    Grant number:18K01694  2018.4 - 2023.3

    日本学術振興会  科学研究費助成事業 基盤研究(C)  基盤研究(C)

    吉川 大介

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    資産運用を安定化するための基本的な考え方は前提となるモデルに対する信頼度に応じて最悪なシナリオを想定することである。そのシナリオの中でできる限り収益を改善する戦略を練るのである。
    この考えに基づきすでに無限期間の投資を行う場合の最適戦略の構築には成功していたが、2018年度はさらに有限期間に制限した最適戦略の構築を試みた。生命保険や年金のように定期的な報告義務がある資産運用の場合、投資期間を有限期間に制約することは有用だからである。
    その結果、理論的な成果として有限期間に投資期間を制限した場合でも最適戦略を導出することに成功した。ところが、有限期間に投資期間を制限した場合、最適解を得るのにラプラス変換が必要となることが明らかになった。これにより、最適戦略を数値的に計算することは無限期間に比べると難しくなることがわかった。
    現在はこの方法を用いた数値シミュレーションを中心に研究を進めている。具体的には、ダウ・ジョーンズ工業株平均の組成銘柄を用いて、無限期間における資産運用、有限期間における資産運用、そして有限期間かつモデル・リスクを勘案した資産運用の三つの方針による運用を4 半期ベースでシミュレーションし、運用成績の比較を行った。いくぶん近似を入れた形ではあるが、現在のところ有限期間かつモデル・リスクを勘案した資産運用がほかの運用手法に比べて安定した成績を上げることが確認できている。
    ところで、ラプラス変換を用いることにより数値計算は難しくなるが有用性もある。最適戦略を明示的に与えることができるため経済学的解釈が容易になるからである。ただし、若干複雑な計算を要するため、数値計算を検証する必要はある。そこで、計算には時間を要するが直接的な手法としてモンテカルロ法を用いた数値計算を行いこれと比較することでラプラス変換による明示解のおおよその妥当性の確認も行った。

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  • Incomplete market structure with model uncertainty

    Grant number:15K03546  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    Daisuke Yoshikawa

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    Grant amount:\3120000 ( Direct Cost: \2400000 、 Indirect Cost:\720000 )

    We considered the financial market structure of contingent claims when the probability distribution of asset prices is given in incomplete form. Then, the following results are derived. First, if investors do not set the risk limit, then they do not participate the market. Second, the number of buyer of contingent claims increasing, the price of them increases. Third, the ratio of the number of buyer and seller does not affect the trading volume of contingent claims.
    We further clarified the market structure of underlying assets; i.e., when investors and market makers optimize their utilities in models with transaction costs, the transaction costs are determined such that the profit of market makers will be stable, even if the market parameters is fluctuated.
    As an application of the above research, we also derived the optimal pairs trading strategy of investors confronting the model uncertainty.

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