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Low-dimensional Cox-Ingersoll-Ross process
Mälardalen University, School of Education, Culture and Communication, Educational Sciences and Mathematics. Taras Shevchenko Natl Univ Kyiv, Dept Probabil Stat & Actuarial Math, Kiev, Ukraine.ORCID iD: 0000-0002-6877-1800
Natl Acad Sci Ukraine, Inst Math, Kiev, Ukraine.;Igor Sikorsky Kyiv Polytech Inst, Kiev, Ukraine..
Univ Oslo, Dept Math, Oslo, Norway.;Univ Oslo, Dept Math, Moltke Moes Vei 35, N-0851 Oslo, Norway..
2024 (English)In: Stochastics: An International Journal of Probablitiy and Stochastic Processes, ISSN 1744-2508, E-ISSN 1744-2516Article in journal (Refereed) Published
Abstract [en]

The present paper investigates Cox-Ingersoll-Ross (CIR) processes of dimension less than 1, with a focus on obtaining an equation of a new type including local times for the square root of the CIR process. To derive this equation, we utilize the fact that non-negative diffusion processes can be obtained by the transformation of time and scale of a certain reflected Brownian motion. The equation mentioned above turns out to contain a term characterized by the local time of the corresponding reflected Brownian motion. Additionally, we establish a new connection between low-dimensional CIR processes and reflected Ornstein-Uhlenbeck (ROU) processes, providing a new representation of Skorokhod reflection functions.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD , 2024.
Keywords [en]
Cox-Ingersoll-Ross process, reflected Ornstein-Uhlenbeck process, Skorokhod problem, local time
National Category
Probability Theory and Statistics
Identifiers
URN: urn:nbn:se:mdh:diva-65673DOI: 10.1080/17442508.2023.2300291ISI: 001140790400001Scopus ID: 2-s2.0-85182208034OAI: oai:DiVA.org:mdh-65673DiVA, id: diva2:1830853
Available from: 2024-01-24 Created: 2024-01-24 Last updated: 2024-01-24Bibliographically approved

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Mishura, Yuliiya

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