Why is Kyowa Kirin stock plunging today?

Kyowa Kirin and Sumitomo Metal Mining are both experiencing significant stock price declines today. Market data indicates that shares for Kyowa Kirin are plunging, while Sumitomo Metal Mining is seeing its stock tumble. These simultaneous downward movements reflect current volatility for both companies within their respective sectors. Investors are closely monitoring the specific drivers behind these sharp drops as both entities face negative pressure on their equity valuations during the current trading session.