Cameco stock was tumbling after agreeing, along with Brookfield Renewable Partners to acquire Westinghouse Electric.

The companies will be forming a strategic partnership to acquire Westinghouse, the nuclear services business. Brookfield Renewable (BEP), along with its institutional partners, will own a 51% interest in Westinghouse, and uranium miner Cameco (CCJ) will own 49%.

Source: finance.yahoo.com