https://www.reuters.com/article/us-retail-trade/retail-frenzy-stalls-as-focus-falls-on-regulator-meeting-idUSKBN2A40Z0 >Stocks at the heart of a recent buying frenzy driven by social media slipped in thin European trade on Thursday, adding to the sense that their spectacular rallies might be fizzling just as U.S. regulators meet to discuss last week's wild ride.