Greek bond investors face a rollercoaster ride for the next four months as the government tries to contain the risk of snap elections, Minister of Administrative Reform Kyriakos Mitsotakis said.

Prime Minister Antonis Samaras has until February to pull together a supermajority in the national parliament to elect a new president, or the anti-bailout opposition party Syriza will force a snap election. That would return Greek voters to their 2012 dilemma when the country's membership of the single currency hung by a thread, Mitsotakis said in an interview.

"The reality is that there will be a climate of uncertainty until February," Mitsotakis, 46, said in his Athens office overlooking the Acropolis. "Volatility is caused by the fear of snap elections and the possibility that these will be won by a party which is not normal."