U.K. energy network giant National Grid (NYSE: NGG ) ( OTCPK:NGGTF ) is the classic utility with monopoly characteristics. That makes a lot of retail investors attracted to it. I see it as an overvalued share with anAnalyst’s Disclosure:I/we have no stock, option or similar derivative position in any of the companies mentioned, and no plans to initiate any such positions within the next 72 hours. I wrote this article myself, and it expresses my own opinions. I am not receiving compensation for it (other tha ...