How do you understand this sentence?

jenny   Fri Dec 07, 2007 2:11 am GMT
I quite don't understand the following sentence because I think it involves some background information. Can anyone who knows help me?

For both the consumers and the operators the Euro will not be a revolution but a plus. Not a revolution because they are already operating in a single market, and within the single market, they can operate, invest and buy and sell in all the countries that are member states of the Eruopean union, not just those that'll participate in the single currency.

I don't understand why the Euro will not be a revolution within the single market ? "a single market" refers to what? I don't quite understand the reason even though it seems the reason is listed in this small paragraph.
Thanks for those could help me
guest   Fri Dec 07, 2007 3:44 am GMT
"a single market" = "the European market"
Guest   Fri Dec 07, 2007 1:05 pm GMT
I guess the real "revolution" was the single market of the Common market, European Union, etc., and the Euro was just a small additional step (the "plus").