Analysts discuss why Nintendo's stock dropped after the Switch reveal

Coming from a VentureBeat interview...

“I think that the stock price reacted in the way it did primarily because the promo video offered neither surprises nor details on price, specs, or launch lineup. Investors were clearly taken aback that Nintendo is just planning to release a tablet-like device with a joypad gimmick that can double as a home console.” - gaming-market analyst Serkan Toto

It's honestly hard to peg down a time when analysts are happy with any announcement from a major gaming company. If they are expecting an announcement, usually they end up unhappy with what they get. Happens to Sony, Microsoft and Nintendo alike.