Greek two-year government bond yields fell to their lowest level this year on Monday as investors welcomed Athens' approval of a series of reforms needed to unlock bailout cash. Parliamentary approval of the reform bill late on Friday keeps Greece on track to secure the next 3 billion euro instalment of its aid programme as well as funds to recapitalise its ailing banks and negotiations on debt relief. Greek debt was the best performing in the euro zone on Monday, with two-year yields down more than 80 basis points at a 2015 low of 8.23 percent, according to Tradeweb.