Insight
How Do Social Media Influence Investments?
Social contagion is a well-documented phenomenon: people adopt the behaviour of others, from smoking to investment decisions. This paper examines how social media shapes financial markets and investor behaviour.
Research Note
JEME Capital Research
- Date
- March 31, 2021
About This Article
How Social Media Influences Investments
Social contagion is a well-documented phenomenon: people adopt the behaviour of others, from smoking to purchasing decisions. Word-of-mouth is effective for trading decisions of both individual investors and financial institutions. With social media delivering information in real time, nearly 80% of investors rely on digital platforms to share financial choices.
This article examines the mechanisms through which social media platforms — from Twitter/X and Reddit to LinkedIn and emerging FinTok — are reshaping market dynamics, information dissemination, and retail investor behaviour.
Key Insights
The Social Media Effect on Markets
01
Social Contagion in Finance
Research confirms that herding behaviour amplified by social networks leads to momentum effects, price overreactions, and increased correlation across retail investor portfolios.
02
Real-Time Information Advantage
Social media's speed advantage over traditional media changes how markets absorb and price new information, creating opportunities for early movers and risks of misinformation cascades.
03
The Retail Investor Phenomenon
The rise of Reddit's WallStreetBets, FinTok, and finance communities on X has fundamentally altered the retail investor landscape, creating new sources of market volatility.
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