1. Political scientist Pablo Simon opening the door and sitting down
2. SOUNDBITE (English) Pablo Simon, Political scientist:
"The big surprise of this election is by far the poor results of Unidos Podemos. We expected that simply with the addition of Podemos and United left they will have for sure more votes than the Socialist party. It wasn't the case, in fact they have had 1.2 million less votes than in the election of 2015."
3. Cutaway of Pablo Simon
4. SOUNDBITE (English) Pablo Simon, Political scientist:
"So in general we can say the results are a surprise but the results also say that the country has moved to the right. Right now Popular party and Ciudadanos have 500 votes more than the addition of Socialist and Unidos Podemos."
5. Close-up Pablo Simon
6. SOUNDBITE (Spanish) Pablo Simon, Political scientist:
"Ciudadanos has become important, it has increased its circle of influence, it has helped contribute in a decisive way to help the Popular party to get the magic number of 170 seats where it could be possible to negotiate in an easy way with Basque and Canary Island nationalists, we think that this will be its most important contribution because the Socialist party will be resistant in abstaining (in support) of a Popular Party government."
The biggest surprise of Sunday's general election in Spain was the poor showing by the leftist coalition of Unidos Podemos, according to political scientist Pablo Simon.
Unidos Podemos gained a million votes fewer compared with the elections last December.
Simon, professor at the Carlos III University, said that Spain had moved to the right and that the centre-right party of Cuidadanos would become key in determining a new government.
Spain's IBEX 35 fell during trading on Monday after a brief rally this morning. But the fall is thought to be more related to the consequences of Brexit than the inconclusive results of Sunday's election.
Spain's center-left Socialist party on Monday rejected acting Prime Minister Mariano Rajoy's proposal to form a "grand coalition" with his conservative Popular Party a day after it won the country's unprecedented repeat election.
The Popular Party won 137 seats in Sunday's vote, which was still short of the majority in the 350-seat Parliament that it enjoyed after the 2011 election.
Rajoy's party also won the December election but no other major party was willing to help him form a government - a scenario that could happen again.