Global markets don't normally pay much attention to this.
Voters go to the polls for European Parliament elections over the next few days from Thursday (May 23).
Turnout in the pan-EU vote usually low, and so is investor interest.
Not this time.
Populist and euroskeptic parties could grab around a quarter of the seats.
And traders wonder what that might mean for Europe.
Reuters markets correspondent Tommy Wilkes is in London: REUTERS CORRESPONDENT TOMMY WILKES SAYING (ENGLISH): "Investors are really worried that that's going to threaten the stability of the euro zone and create problems for the European Parliament.
For example to agree a united front in stopping a global trade war." The nerves have seen money flow into perceived safe havens.
German governments bonds have climbed as investors play it cautious.
Italian government debt is headed the other way.
All eyes on the far-right League, party of Deputy Prime Minister Matteo Salvini: REUTERS CORRESPONDENT TOMMY WILKES SAYING (ENGLISH): "Investors are really worried that if his party does well in the polls it will engage in another showdown with Brussels over its spending plans, and it could even trigger the end of the coalition and a general election in Italy.
Italy is the euro zone's third-largest member; it's also heavily indebted, and investors are really worried about its spending plans if Salvini's party does well." Then there's Brexit.
Still no clarity on how, when or whether it will happen.
The UK should have left already.
Now the chaos may see Nigel Farage's new Brexit Party top the European polls in Britain.
(SOUNDBITE) (English) BREXIT PARTY LEADER, NIGEL FARAGE, SAYING (ASKED WHAT IS THE POINT OF VOTING FOR HIM IN EUROPEAN PARLIAMENT ELECTION): "If you want Brexit, you've got to vote Brexit.
We did it once.
They ignored us.
So we're going to tell them again." That might finally topple Prime Minister Theresa May, and usher in hard-line Brexiteer as her successor.
As for European lawmakers, they always wanted more interest in their elections.
This time, for good or ill, that wish will be granted.