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She says that she's really good at it, too.
Fox, who has a blog and video episodes called "Fox On Stocks", says that she earns more than 64 percent on her investments per year.
We reached out to Fox to find out more about her stock trading career.
In the meantime, we'll take this as a sign that the stock market really is back.
Check out one of her video tutorials here:
(HT: Josh Brown)