LINK: The final word on PPC punctuation. Period.
http://www.attacat.co.uk/brain/152-revision-v1There was I, thinking of writing a lovely interesting piece on punctuation in paid-search keywords after coming up against a few tricky special characters, only to stumble upon this rather tidy little summary by the Search Agents. So if you’re not sure whether a hyphen makes a separate keyword do have a look:
More is not the best policy when it comes to using punctuation and symbols in keywords. In fact in most cases, it’s simply not allowed.