Why Caterpillar's stock soared in 2017

It's not hard to see the overlying reason why Caterpillar Inc. (NYSE:CAT)stock is up nearly 50% in 2017 at the time of this writing. The simple explanation is earnings expectations have more than doubled since the start of its financial year as management raised full-year 2017 adjusted profit per share guidance from $2.90 to $6.25. Here's a look at just how and why this happened

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