Gee whiz, there must be some sort of explanation for this amazing coincidence!
Apparently, Japanese investors seem to like this Square-Nintendo thing, and it showed in the markets over yonder.
Nintendo's stocks were bumped up a respectable 5.6% on Monday to ¥21080 (around $162). However, it seems the big winner here is Square, whose stocks spiked 15.4% to ¥2550 (about $20).
You'd think that this would be a bigger boost to Nintendo than to Square, but I guess those investors seem to think otherwise...