Mailbag Extra: incl. 'Top industries and stocks for 5+ years'

-- The top industries and top stocks for 5+ years

-- Is the stock market a zero sum game?

-- Should I copy others' investments?

-- How can I short stocks?

-- Is my portfolio too concentrated?

-- Should I invest in a managed fund to avoid currency hassles?

-- How do I keep my brokerage costs down?

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