Why is Rivian stock sliding today?

Market reports indicate that both Rivian and SanDisk are experiencing a decline in their stock prices today. Investors are monitoring the specific reasons behind these downward trends as both companies face sliding valuations in the current trading session. The data confirms a negative movement for Rivian shares and SanDisk shares simultaneously, reflecting a broader shift in investor sentiment or specific company challenges that are causing the current market volatility for these two distinct entities.