Will the TACO trade save markets from Trump's Greenland threats? Here are 3 scenarios analysts are eyeing.

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• Markets are selling off on Tuesday, but some think Trump's latest comments could revive the TACO trade.
• TACO stands for Trump Always Chickens Out, the idea that the president's threats are mostly bluster.
• Forecasters think a diplomatic negotiation between the US and Denmark is the most likely outcome.

Is TACO back on the menu?

That is, Trump Always Chickens Out, or the idea that the president's aggressive policy...