Why is Astellas Pharma stock climbing today?

ZAI stock and Astellas Pharma stock are both experiencing upward movement in today's trading sessions. Market observers are analyzing the specific drivers behind the price increases for both companies. While ZAI shows positive momentum, Astellas Pharma is also seeing a climb in its share value. Investors are monitoring these developments to understand the underlying catalysts contributing to the current bullish trend affecting both the biotechnology and pharmaceutical sectors in the current market environment.