Pimco's Gross says Greek swap lessens sanctity of bondholders contracts.

Exchanged bonds may yield as much as 20%, Morgan Stanley says.

Exchanged bonds may yield as much as 20%, Morgan Stanley says.

Slide in U.S. Treasury yields counters rosier economic data.

Slide in U.S. Treasury yields counters rosier economic data.

Rating agency expected to issue negative outlook on all 17 countries.

Rating agency expected to issue negative outlook on all 17 countries.

Supercommittees failure raises probability of a downgrade, rating agency says.