Overconfidence and forecast accuracy: An experimental investigation on the hard–easy effect
Studies in Economics and Finance
ISSN: 1086-7376
Article publication date: 8 July 2019
Issue publication date: 27 July 2021
Abstract
Purpose
This paper aims to investigate how overconfidence bias affects financial market participants’ forecast accuracy based on the hard–easy effect concept of overconfidence research.
Design/methodology/approach
The authors adopt an experimental method for behavioural finance studies. In the experiment, the authors measure and capture participants’ forecast accuracy as well as their individual confidence level. In particular, participants make incentive-compatible forecasts, that is, the elicited forecast determines the participants’ financial rewards in real monetary gain/loss.
Findings
The results show that the hard–easy effect causes optimistic forecasts for hard-to-predict stocks, indicating that overconfident investors tend to make over-optimistic and less accurate price forecasts when making judgements on hard tasks. Consistent with the literature, the authors find evidence of a negative relationship between forecast accuracy and confidence level. The results also indicate that the overall relationship between overconfidence and forecast accuracy is driven by the price forecasts made for hard-to-predict stocks.
Originality/value
As per the authors’ knowledge, this paper is one of the first studies that provides empirical evidence directly showing the hard–easy effect in the relation between overconfidence and forecast ability in an experimental setting. This study uses an experimental design that specifically measures the hard–easy effect in a stock market scenario using professional financial information and real monetary incentives, which have not been used in any previous studies of the hard–easy effect.
Keywords
Citation
Liu, B. and Tan, M. (2021), "Overconfidence and forecast accuracy: An experimental investigation on the hard–easy effect", Studies in Economics and Finance, Vol. 38 No. 3, pp. 601-618. https://doi.org/10.1108/SEF-12-2017-0345
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited