LONDON, Dec 15 (Reuters) - Short-dated Greek government bond yields spiked to a four-month high on Thursday ahead of a parliamentary vote on a controversial bonus to poor pensioners that threatens to derail the country's debt relief plans.
Euro zone lenders put a short-term debt relief deal for Greece on hold on Wednesday after the Athens government proposed a one-off payout to pensioners. The Greek parliament is due to vote on the payout later on Thursday.
Greek two-year bond yields rose over 150 basis points on Thursday to 8.65 percent, their highest since August.
Ten-year yields, which hit a one-month high on Wednesday, rose a further 25 bps to 7.61 percent, while five-year yields jumped 16 bps to 8.34 percent. (Reporting by John Geddie; Editing by Dhara Ranasinghe)