Financial Modeling with Geometric Brownian Motion

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Chelsea Peng
Chelsea Peng

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GJMBR Volume 23 Issue C4

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Financial Modeling with Geometric Brownian Motion Banner
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This project evaluates the Brownian Motion model’s effectiveness compared to historical stock market data. This paper analyzes its potential reasons for inaccuracies across time spans, specifically delving into its inability to incorporate major events such as the COVID-19 pandemic and the 2008 stock market crash. The paper uses the 2008 stock market crash and the Great Depression example instead of the COVID-19 pandemic to allow long-term accuracy to be tested. A prominent element of this model is the stochastic differential equation, which represents the randomness and uniqueness that the price of a derivative depends on. Stochastic elements reflect factors that influence the value of a derivative, like time, volatility of the underlying asset, interest rates, and other market conditions. The Markov property simplifies this complicated figure, meaning that the future value is independent of past prices. The Markov property is a “memoryless” feature; the current price is the only factor in future pricing, aligning with the effective market hypothesis. Finally, the paper offers insights on enhancements to the model, adjusting it to be a more efficient tool for economic forecasting.

Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

Chelsea Peng. 2026. \u201cFinancial Modeling with Geometric Brownian Motion\u201d. Global Journal of Management and Business Research - C: Finance GJMBR-C Volume 23 (GJMBR Volume 23 Issue C4): .

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Accurate, innovative financial modeling methods for academic research. Improve financial forecasts with geometry-based models.
Issue Cover
GJMBR Volume 23 Issue C4
Pg. 57- 63
Journal Specifications

Crossref Journal DOI 10.17406/GJMBR

Print ISSN 0975-5853

e-ISSN 2249-4588

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GJMBR-C Classification: FOR Code: 1502
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v1.2

Issue date

January 13, 2024

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English

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This project evaluates the Brownian Motion model’s effectiveness compared to historical stock market data. This paper analyzes its potential reasons for inaccuracies across time spans, specifically delving into its inability to incorporate major events such as the COVID-19 pandemic and the 2008 stock market crash. The paper uses the 2008 stock market crash and the Great Depression example instead of the COVID-19 pandemic to allow long-term accuracy to be tested. A prominent element of this model is the stochastic differential equation, which represents the randomness and uniqueness that the price of a derivative depends on. Stochastic elements reflect factors that influence the value of a derivative, like time, volatility of the underlying asset, interest rates, and other market conditions. The Markov property simplifies this complicated figure, meaning that the future value is independent of past prices. The Markov property is a “memoryless” feature; the current price is the only factor in future pricing, aligning with the effective market hypothesis. Finally, the paper offers insights on enhancements to the model, adjusting it to be a more efficient tool for economic forecasting.

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Financial Modeling with Geometric Brownian Motion

Chelsea Peng
Chelsea Peng

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