Abstract
A
challenge to EMH is that individuals often overreact and underreact to news
causing stock markets to react according to investor behaviour in their
investment decision making. Generally, the study determined the effect of
investor behaviour on stock market reaction of listed companies in Kenya.
Specifically, the study determined the effect of investor herd behaviour on
stock market reactions of listed companies in Kenya; determined the effect of
investor loss aversion on stock market reactions
of listed companies in Kenya; determined the effect of investor mental
accounting on stock market reactions of listed
companies in Kenya; and determined the effect of investor overconfidence
on stock market reactions of listed companies in
Kenya. The
target population was 67 listed
companies at the
Nairobi Securities Exchange. A sample of 48 listed companies was used for
analysis. Secondary
data extracted from NSE historical data of listed
companies for the period 2004 to 2016 was used for analysis. The study adopted quantitative research
design. Panel data regression analysis model was used. The results indicated
that herd behaviour did not have a significant effect on stock market reaction.
However, loss aversion, mental accounting and overconfidence had significant
effect on stock market reaction in Kenya.