Nintendo shares plummet after 'Pokemon Go' reality check

Nintendo shares fell 18 percent today after investors got some bad news about "Pokemon Go."

Officials said the game would only have a "limited" effect on its bottom line.

The reason, officials say, is Nintendo isn't the only company with a stake in the profits.

Nintendo and The Pokemon Co. invested in game developer Niantic. Nintendo owns about a third of The Pokemon Co.

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