Collusion Indicators in the GameStop Short Squeeze

  • Michael J. Campbell Aurislink, USA


A new theory and model of the stock market that incorporates decision noise in the spirit of behavioral economics, collaboration in the spirit of experimental economics, and financial data and features in the spirit of econophysics is used to support a theory from 2005 that stock-market collusion should lower the level of stock-market decision noise - i.e., a quantitative way of seeing how traders influence each other in a stock market. This idea is used to find two rare indicators of the GameStop short squeeze – one of which occurred six days before the rapid price increase, which could have potentially reduced the over $19 billion in losses of short sellers by a significant amount. The relationship predicted by the model between temperature and aggregate volume has been validated by data from the GameStop short squeeze.


[1]. T. Mathis (2021). How much did hedge funds lose on gamestop? Infinity Investing (Sep 2021).
[2]. O. Aliaj, M. Mackenzie, L. Fletcher (2021). Melvin capital, gamestop and the road to disaster. Financial Times (Feb 2021).
[3]. M. Goldstein, K. Kelly (2022). Melvin capital, hedge fund torpedoed by the gamestop frenzy, is shutting down. New York Times (May 2022).
[4]. Organisation for Economic Co-operation and Development and Centre for Cooperation with European Economies in Transition (1993). Glossary of Industrial Organisation Economics and Competition Law, Organisation for Economic Cooperation and Development, 1993. URL
[5]. K. Roberts (2016). Collusion, in: The New Palgrave Dictionary of Economics, Palgrave Macmillan UK, London, 2016, pp. 1-5. URL
[6]. M. J. Campbell (2016). Inevitability of collusion in a coopetitive bounded rational Cournot model with increasing demand, Journal of Mathematical Economics and Finance 2 (1) (2016) 7-20, iSSN 2458-0813.
[7]. D. McConnel (2021). Ethics of the gamestop short squeeze (2021). URL
[8]. R. Lande, H. Marvel (2000). The three types of collusion: Fixing prices, rivals, and rules, no. 941, 2000. URL
[9]. V. L. Smith (2007). Rationality in Economics: Constructivist and ecological forms, Cambridge University Press, 2007. doi:10.1017/CBO9780511754364.
[10]. M. J. Campbell, V. L. Smith (2021). An elementary humanomics approach to boundedly rational quadratic models, Physica A: Statistical Mechanics and its Applications 562 (2021) 125309. doi: 10.1016/j.physa.2020.125309. URL
[11]. M. J. Campbell (2022). Heavy-tailed distributions of volume and price-change resulting from strategy coordination and decision noise, Physica A: Statistical Mechanics and its Applications 607 (2022) 128211.doi: 10.1016/j.physa.2022.128211. URL
[12]. D. Kahneman, O. Sibony, C. R. Sunstein (2021). Noise: a flaw in human judgement, New York : Little, Brown Spark, 2021.
[13]. F. Beneke, M.-O. Mackenrodt (2019). Artificial intelligence and collusion, IIC - International Review of Intellectual Property and Competition Law 50(2019) 109-134. doi:10.1007/s40319-018-00773-x. URL
[14]. F. Beneke, M.-O. Mackenrodt (2020). Remedies for algorithmic tacit collusion, Journal of Antitrust Enforcement 9 (1) (2020) 152-176. doi:10.1093/jaenfo/jnaa040. URL
[15]. V. L. Smith, B. J.Wilson (2019). Humanomics: Moral Sentiments and the Wealth of Nations for the Twenty-First Century, Cambridge Studies in Economics, Choice, and Society, Cambridge University Press, 2019. doi:10.1017/9781108185561.
[16]. V. Plerou, P. Gopikrishnan, L. A. N. Amaral, X. Gabaix, H. E. Stanley (2000). Economic fluctuations and anomalous diffusion, Physical Review E 62 (3 A)(2000) R3023-R3026. doi:10.1103/PhysRevE.62.R3023.
[17]. V. Plerou, P. Gopikrishnan, X. Gabaix, H. E. Stanley (2000). Statistical properties of share volume traded in financial markets, Physical Review E 62 (4 A) (2000) R4493-R4496. doi:10.1103/PhysRevE.62.R4493.
[18]. M. J. Campbell (2005). A Gibbsian approach to potential game theory (2005). URL
[19]. Subreddit Stats, Statistics for subreddit forum r/wallstreetbets. URL
How to Cite
CAMPBELL, Michael J.. Collusion Indicators in the GameStop Short Squeeze. Journal of Mathematical Economics and Finance, [S.l.], v. 9, n. 2, p. 41 - 49, dec. 2023. ISSN 2458-0813. Available at: <>. Date accessed: 17 apr. 2024. doi: