Argentina's Supreme Court has ruled that a media bill passed in
2009 is constitutional - clearing the way for the break-up of large
media groups.
The country's biggest broadcasting and newspaper company,
Clarin, had appealed against the law proposed by President Cristina
Fernandez de Kirchner.
Critics say the bill is an attempt to silence opposition voices
in Argentina.
Supporters say it will boost pluralism and reduce the dominance
of big corporate interests.
Following the ruling, Clarin's share price fell nearly 6% and
sales had to be suspended.