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FTA:

But it's not all about the tweets. Understanding the way people are feeling is the underlying principal behind the magic, but other factors ultimately decide what gets traded and how. The algorithm also looks at how the market looks at that moment along with commodities pricing, explains Jordan.

So the article is not about how the hedge fund used twitter to beat the market, just how it happened to beat the market over a single highly volatile month using twitter as a factor into the algorithms that decide when and what to trade.

Exactly. If they can consistently predict the results over a year, I will be impressed.