8 June 2018 - 1 minute read

That market will then remain closed until settlement on the 15th day of the following month, as is currently the case.

We have taken this decision in response to concerns that teams have been making profits by simply by buying the correct outcome as soon as the Met Office publishes the official number. 

While some profit can be made this way, larger rewards are going to the teams who buy the correct outcome earlier in the month when it is still very cheap. 

Nonetheless, we hope that this change will put any such concerns to rest.