
Are the following mentions coreferent?:
<m> buy </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. 
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<m> buying </m> in Advanced Micro Devices Inc. shook up the personal computer industry by buying ATI Technologies Inc. for US $ 5.4-billion yesterday, opening up a new front in the battle with Intel Corp. to control the computer chip market. 