THE DIGITAL ECHO CHAMBER: SOCIAL MEDIA'S IMPACT ON OVERCONFIDENCE AND PERFORMANCE OF INVESTORS

Abstract
The rapid growth of social media has transformed the financial decision-making environment
for modern investors. Online platforms such as Twitter/X, Reddit, YouTube, Telegram, and
investment forums allow investors to access information instantly and engage in collective
discussions regarding stocks, cryptocurrencies, and financial markets. However, the repeated
exposure to similar opinions within digital communities often creates an “echo chamber”
effect, where individuals become increasingly confident in their beliefs while ignoring
contradictory information. This study examines the influence of social media-driven echo
chambers on investor overconfidence and investment performance. The paper explores
behavioral finance theories, the psychological mechanisms behind digital influence, and the
consequences of excessive confidence on trading outcomes. The study further evaluates how
social media algorithms amplify confirmation bias and herd behavior among retail investors.
The findings indicate that although social media enhances information accessibility and
market participation, it also increases speculative trading, emotional investing, and irrational
decision-making. Investors who rely excessively on online communities tend to
underestimate risk and overestimate their market knowledge, resulting in lower long-term
investment performance. The paper concludes by recommending financial literacy initiatives,
diversified information consumption, and regulatory attention toward misinformation in
digital investment communities.
Keywords: Social media, Overconfidence bias, Echo chamber, Investor behavior, Behavioral
finance, Investment performance