Rumors can be powerful forces in the economy, as evidenced by an 8.1 percent rise in Electronic Arts stock today following unsubstantiated rumors that Microsoft was interested in buying the publisher out.

What analysts and strategists are calling "unsubstantiated chatter" had a profound effect on EA stock today, rising 8.1 percent to $20.01 during Nasdaq trading this afternoon.

"There's talk that Microsoft might be interested in acquiring Electronic Arts. It's unsubstantiated chatter, but it's out there," said Frederic Ruffy, an options strategist at WhatsTrading.com in New York.

And sometimes being out there is more than enough. Microsoft shares also rose during the day, gaining 1.1 percent to $26.05, despite analysts claiming that such a move makes no sense whatsoever.

But Trip Chowdhry, an analyst at Global Equities Research, said Electronic Arts was not on Microsoft's "radar screen" based on his industry contacts. "Our contacts just don't see Microsoft buying Electronic Arts, no synergies whatsoever, and also not Microsoft's corporate primary focus right now," Chowdhry wrote in an e-mailed note.

A quick glance about the internet finds that analysts largely agree - this doesn't seem like a likely move. Still, we've reached out to Microsoft and EA alike, and will update the story once we receive any response.

Electronic Arts stock up on takeover talk-traders [Reuters - Thanks David!]