Greece Outside In: Greek yields jump as German parties want referendum on EU moves

* German parties urge referendums on major EU decisions LONDON, Nov 12 (Reuters) - Greek bond yields jumped on Tuesday on concerns that a proposal for German parties to hold nationwide referendums for major European decisions may complicate Athens's efforts to overcome its debt crisis. Greek 10-year bond yields rose 43 basis points to 8.58 percent, having fallen as low as 7.94 percent at the ...