Fitch Ratings to downgrade UK's sovereign credit rating in 2010

FITCH.UKEX.2010

Short: Fitch Ratings to downgrade UK's sovereign credit rating in 2010

Long: This contract pays $1 if Fitch Ratings downgrades the United Kingdom's current AAA sovereign foreign currency credit rating in 2010.

Judging: This contract is not affected by changes in outlook or watch status.

I would add in a firm expiry date.

I wouldn't add in anything allowing you to extend it - either Fitch has made a downgrade announcement in 2010 or it hasn't.