As to the uncharacteristic drops that
ABIC brought up, I don't think it's privileged knowledge that led to selling off. Honestly I can't really fathom what that would be. There are a few things that would depress the value. Obviously investors took a gamble on Labo that's not paying off. They're probably going to have some difficulty reaching 20M. Maybe the job postings from Metroid Prime 4 and Ridge Racer directors wasn't because the games were nearly done, but canceled. Maybe mobile Mario Kart is having some troubles. All of these would impact the stock value. None would create a sustained crash I don't think however.
Rather I think it's the opposite. Institutional investors don't have any knowledge of what is going to happen. Then Nintendo shows up with a lineup at the most important event for reveals that somehow has even fewer games than we knew about, and the big investors just finally got sick of it and are pulling out.
That, or they're simply looking at the precedent, saw the stock during the Wii soar and crash and are now just figuring, okay Switch peaked, stock is going to crash, get out while you can.
I hope it isn't the latter, then I should really worry about cutting my losses on what hitherto had seemed like a golden goose investment.