Pfizer/Allergan merge; Tyson's mixed results; Lions Gate's 'Mockingjay' doesn't fly high enough

Here are some of the stocks the Yahoo Finance team will be watching for you today.

Allergan (AGN), the Botox maker, is being bought by Pfizer (PFE) for about $160 billion in stock. The combination creates the world's largest drug maker.  The so-called tax inversion deal could also potentially save Pfizer millions in taxes each year.

Lions Gate Entertainment (LGF) is in the spotlight this morning. The studio's final film in the "Hunger Games" series topped the box office this weekend, bringing in an estimated $101 million according to Rentrak. Even though the "Mockingjay - Part 2" debut was the fifth-highest opening this year, it was still not good enough to beat its own records. The movie ranked the lowest of the four installments in the franchise.

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Tyson Foods (TSN) handed in mixed results for its fiscal fourth quarter. Earnings per share missed estimates, while revenue came in slightly above expectations. Sales rose 4% from a year ago thanks to strong demand for chicken and its acquisition of Hillshire Brands, which helped lift sales of prepared food.

Chipotle (CMG) is in focus after its stock fell more than 12% on Friday, following news that the E. coli outbreak spread to restaurants in other states, including California, New York, Ohio, and Minnesota.

Brocade Communications (BRCD), the chip maker, is due to report results after the market close. Analysts are looking for Brocade to earn $0.24 a share on revenue of nearly $576 million dollars.