Goldman Sachs analysts read through more than 1,000 of Trump's social media posts. They found a key takeaway about how he talks about oil.

President Donald Trump's social media posts show he is focused on the oil market.

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• Goldman Sachs analysts scrutinized President Donald Trump's social media posts for oil price insights.
• They said Trump's posts show a correlation with oil prices.
• The analysts concluded that the president prefers West Texas Intermediate prices in the $40-$50 a barrel range.

President Donald Trump's social media posts have long gripped global markets. Now...