Why is Mattel stock down today?

Market activity shows divergent trends among several companies. Applied Materials, FuelCell Energy, and Simply Good Foods are all experiencing stock surges today. Conversely, Mattel and Barry Callebaut are seeing their stock prices slide. These movements reflect a mixed trading session where specific sectors and individual companies are reacting differently to market conditions, resulting in significant gains for some entities while others face downward pressure in their current valuation and overall trading performance.