
Are the following mentions coreferent?:
<m> announced </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 on Monday. 
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<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. 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. 