Warner Music Group (WMG.N) posted a deeper loss on Tuesday as its sales declined more than expected, sending the company's shares down 9 percent. The world's third-largest music company said it also lost market share even as it battles with a difficult industry transition from CDs to digital music. Chief Executive Edgar Bronfman declined to comment on reports from last month that the company has put itself up for sale while simultaneously exploring the possibility of buying smaller rival EMI Group.
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