Looking up the JP Morgan balance sheet will be very easy indeed, it's public knowledge. You're assuming J P Morgan have a 'stack' because you've read it on some conspiracy website.
I don't own any miners, gold or silver, but I do own a natural resources fund which owns some and is going ballistic because it owns industrial metals, which are useful - gold and silver aren't, which is why they're stagnating in the biggest boom in history.
