Financial markets are rallying on optimism that Thursday’s Brexit referendum will end with a vote for “remain,” but investors will have to wait longer than usual to get the result.

Unlike normal general elections there won’t be any exit polls at 10 p.m. London time, or 5 p.m. Eastern Time, when the voting stations close, so anyone nervously waiting for the outcome will have to stay awake and watch for local results to trickle out overnight.

That’s because none of the British broadcasters have commissioned any exit polls because of concerns over accuracy, according to the Telegraph newspaper.

Read:The Brexit vote: Everything you need to know about the referendum

The final result is expected around “breakfast time” on Friday morning, according to the Electoral Commission, but the outcome may become clear earlier than that as the bigger electoral regions start to announce their votes. The 382 local counting areas vary hugely in size, so results from many of the smaller ones are expected earlier in the night.

The turnout of voters — which is also seen as pivotal in shaping the outcome — will come out even earlier than the result and could trigger some early trading action in the markets. A high turnout is likely to mean a good night for the ”remain” camp, because it probably means that more young, pro-EU people voted in the referendum.

Read:These 4 charts show how markets are being held hostage by Brexit fears

Here’s a rundown of the key times to watch Thursday through early Friday morning.

Time (U.S. Eastern in parenthesis) Event 7 a.m. (2.a.m.) Polling stations open 10 p.m. (5 p.m.) Polling stations close, no exit polls Around 11:30 p.m. (6:30 p.m.) First announcements on voter turnout 12:30 a.m. (7:30 p.m.) Results expected for first counting areas 3-4 a.m. (10-11 p.m.) Results from half of the counting areas are in Around 5 a.m. (midnight) About 80% of counting areas have reported results 7 a.m. (2 a.m.) All votes are likely to have been counted and the official result is expected shortly after.

For a detailed list of expected times on results and voter turnout click here.

The final result will be declared by chairwoman of the Electoral Commission and the referendum’s chief counting officer, Jenny Watson, at Manchester Town Hall once all the votes are in.

In the absence of exit polls, hedge funds and investment banks have commissioned private surveys to give them a head start on trading, according to U.K. media. That means financial markets could start to react to the referendum before any official results have been announced.

Read:Chart shows how fallout from Brexit vote will influence trading