Why is Rakuten stock tumbling today?

Recent market activity shows significant volatility across various sectors. M3, Square Enix, SK Hynix, Samsung Electronics, Suncorp, Fleetpartners, and AGL Energy are all experiencing stock surges or rallies. Conversely, Sanrio, Rakuten, and Tencent Music Entertainment are seeing their stock prices plunge or tumble. These divergent trends highlight a mixed performance environment where several technology and energy firms are gaining momentum while specific entertainment and e-commerce entities face downward pressure in the current trading sessions.