etail investors following the Reddit forum WallStreetBets in the United States piled into GameStop Corp last month, sending shares in the retailer rocketing at the expense of prominent investors who had bet against the stock, ringing alarm bells in Europe.
Although market rules and structures are different in the EU, it cannot be ruled out that similar circumstances may occur in the bloc as well, the European Securities and Markets Authority said in a statement.
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https://www.reuters.com/article/us-eu-markets-regulator/dont-rely-on-social-media-stock-tips-eu-watchdog-warns-retail-investors-idUSKBN2AH16A