Business Review


This paper provides empirical evidence of the presence, proportion and trading behavior of noise traders in the U.S. equity market (S&P500 index). A simple methodology is used to estimate the heterogeneous agent asset pricing model involving noise traders’ risk, through GMM. Departing from previous estimations of heterogeneous agent models, it estimates fundamental price using the consumption-based asset pricing model and noise traders’ misperception as deviation from this price. It concludes that noise traders exist in the S&P500, they exaggerate price expectations as compared to fundamental traders, and traders (or investors) are rational, on average.


Asset pricing, Heterogeneous beliefs, Noise traders, Representative agent model



Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Published Online

December 10, 2020

Included in

Finance Commons



Publication Stage



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.