Central bank economists Fabian Wagner and Julian Metzler established the Reddit Retail Investor Sentiment Indicator to assess whether online discussions mirror actual retail trading activity. The project examined forum discussions spanning multiple investing communities, including r/wallstreetbets and r/Bitcoin, using ChatGPT-5.1. The findings reveal that the indicator closely mirrors major financial events and offers valuable foresight into short-term price movements. Furthermore, shifts registered by the metric show a direct link to next-day market returns.
Key points
Analysis of social media discussions allows central bankers to gauge retail investor sent…: Analysis of social media discussions allows central bankers to gauge retail investor sentiment far faster than traditional surveys.
The custom index demonstrates predictive value for short-term asset price movements and c…: The custom index demonstrates predictive value for short-term asset price movements and connects to next-day market returns.
Sentiment signals derived from social network activity prove particularly valuable for fi…: Sentiment signals derived from social network activity prove particularly valuable for financial authorities during market downturns.
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FRANKFURT, Nov 12 : Chatter on the online discussion site Reddit can tell policymakers how retail investors are feeling sooner than traditional surveys, particularly when markets are under stress, two European Central Bank economists concluded.
Feeding over nine million posts on Reddit through the artificial intelligence chatbot ChatGPT-5.1, the researchers say they can detect retail investor mood shifts in a way that aligns with more established sentiment indicators, except their signals are timelier and more frequent.
Combing through posts on various Reddit forums, including r/wallstreetbets, r/stocks, r/StockMarket, r/investing, r/Bitcoin and r/Economics, the economists created an index called the Reddit Retail Investor Sentiment Indicator (R-RISI), which indicates that online discussion may reflect actual retail trading, they said.
"The R-RISI is timelier on short-term market dynamics and offers higher frequency information than survey-based indicators," they said in a blog post published by the ECB on Thursday.
"Changes in the R-RISI are also associated with next-day market returns, particularly during market downturns," the authors, Fabian Wagner and Julian Metzler, said.
The index closely reflects major market developments and contains signals that can help…
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