Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67(5), 1269-1283 | DOI: 10.11118/actaun201967051269

Utilization of Artificial Intelligence for Sensitivity Analysis in the Stock Market

Zuzana Janková, Petr Dostál
Institute of Informatics, Faculty of Business and Management, Brno University of Technology, Kolejní 2906/4, Královo Pole, 612 00 Brno, Czech Republic

The main contribution of this paper is to perform sensitivity analysis using artificial intelligence methods on the US stock market using alternative psychological indicators. The Takagi-Sugeno fuzzy model applies investor sentiment represented by VIX index and monitors the impact of economic optimism, political stability and control of the corruption index on the S&P 500 stock index. Alternative psychological indicators have been chosen that have not been explored in the context of stock index performance sensitivity. Investors primarily use fundamental and technical analysis as a source to determine when and what to buy into an investment portfolio. However, psychological factors that may indicate the strength of reaction to the market are often neglected. Fuzzy rules are determined and tested using a neuro-fuzzy inference system and then the rules are reduced by fuzzy clustering to improve performance of ANFIS. The membership function is defined as a Gaussian function because it has the least RMSE value. The sensitivity analysis confirmed that there is a significant impact of the political stability index and the economic optimism index on the S&P 500 performance. Conversely, the sensitivity analysis, unlike the previous study, did not confirm the strong impact of VIX on equity index performance. Results indicate that incorporating psychological indicators in macroeconomic models leads to better supervision and control of the financial markets.

Keywords: artificial intelligence, fuzzy approach, fuzzy logic, sensitivity analysis, sentiment, soft computing, stock market
Grants and funding:

This paper was supported by project No. FP-J-19-5814 'The Use of Artificial Intelligence in Business III' from the Internal Grant Agency at Brno University of Technology.

Received: May 14, 2019; Accepted: September 30, 2019; Published: October 31, 2019  Show citation

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Janková, Z., & Dostál, P. (2019). Utilization of Artificial Intelligence for Sensitivity Analysis in the Stock Market. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 67(5), 1269-1283. doi: 10.11118/actaun201967051269
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