Why is Reddit stock surging in aftermarket trade today?

Market activity shows diverse trends across global equities. Nintendo, Semiconductor Manufacturing International, Reddit, Baby Bunting, and LG are experiencing stock surges or rallies. Conversely, Alibaba, Gemini Space Station, Hertz, QBE Insurance, and JD.com HK are seeing their stock prices slide. These movements reflect a fragmented trading session where specific sectors in technology, retail, and insurance are reacting differently to current market conditions, resulting in a mix of significant gains and losses across the listed companies.