Sirius and XM, the top two US satellite radio providers, on Wednesday faced growing doubts over their ability to secure antitrust clearance for a $13bn merger announced in February.
The jitters on Wall Street about the deal were reflected in a sharp drop in the shares of the two companies, with XM falling 9.9 per cent to $13.21 and Sirius losing 6 per cent to close at $3.29.
