What’s the highest average annual percentage return an expert stock investor/trader can make?

What’s the best way to call investor relations of a company?

I want to know why their stock dropped 23% today with no news. Do I ask that directly?
And it’s a real company. NYSE
not a penny stock.

What’s stopping other traders from simply copying the same portfolio investment strategies as the “Big Names”?

For instance, why couldn’t someone just visit a site like this:
http://www.gurufocus.com/holdings.php
(which follows the investment portfolio of arguably the most famous and successful trader known today, Warren Buffett)
Couldn’t they then simply ask their stockbroker for the same stocks, but in amounts they can afford?

What’s the best investing advice for a Soldier going to Iraq or Afghan for a year?

I’m going to Iraq or Afghan in July and I’d like some investing advice for while I’m out there. Or where I could go to go get some investment advice? gonna be out there a year, but it could also be something that I can do to build on once I return as [...]