
Are the following mentions coreferent?:
<m> said </m> in RBC Capital Markets downgraded ATI Technologies to sector perform from outperform after Advanced Micro Devices announced its intention to buy the Canadian graphics chip-maker for $ 5.4 billion. Even though the takeover looks fairly valued, RBC analyst Steve Arthur said there is limited upside to the offer unless competing bids are made for ATI. For now, Arthur said AMD's takeover deal, which is expected to close in the fourth quarter, effectively offers his one-year price target of $ 21 now. 
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<m> announce </m> in Advanced Micro Devices (NYSE : AMD) announced the largest acquisition in its history Monday, paying about $ 5.4 billion to acquire graphics chip specialist ATI Technologies. Hector Ruiz, chairman and chief executive of AMD, during a teleconference to announce the deal, said that together they intend to create a processing powerhouse. 