A predictor based method for signal detection in time series case study: financial markets of Iran in COVID-19 outbreak

Articles in Press

Document Type : Research Article

Authors

1 Department of Statistics, Faculty of Mathematics and Computer Science, Amirkabir University of Technology, Tehran, Iran.

2 Department of Statistics, Shahid Beheshti University, Tehran, Iran.

3 Department of Mathematics and Statistics, University of Calgary, Calgary, Canada.

10.22124/jmm.2025.29826.2666

Abstract

In this paper, we propose a signal detection method in time series data within the context of the financial markets. By analyzing historical data from the related markets, such as foreign exchange rates and cryptocurrency prices, we aim to identify significant signals affecting the cash price of refined Gold in the Iranian market. Our approach leverages various time series models, including autoregressive integrated moving average, seasonal autoregressive integrated moving average, and neural networks, and also regression-based time series methods to predict fluctuations in Gold prices. We focus on a working days period before and after the onset of the COVID-19 outbreak in Iran on February 23, 2020. To achieve this, we propose a predictor-based algorithm for signal detection that utilizes both traditional time series and regression models. This algorithm identifies auxiliary markets that correlate with the target market, fits appropriate models to predict future values, and then determines cloud confidence intervals around these predictions. Observations that deviate significantly from these intervals are flagged as potential signals, suggesting unexpected changes or trends in the target market. Our method not only enhances the ability to detect significant signals in financial markets but also provides a valuable tool for investors and analysts to anticipate and respond to market fluctuations, particularly during periods of economic instability, ultimately contributing to more informed decision-making and risk mitigation strategies.

Keywords

Journal of Mathematical Modeling

Articles in Press, Corrected Proof
Available Online from 27 September 2025

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