The “Trump Always Chickens Out” meme hatched on Wall Street, went viral in Washington, and now has its own Taco Tuesday ritual. Here’s how a joke became a litmus test for trade policy. Following last week’s mainstream debut of the Wall Street-borne acronym TACO,

There's a popular nickname for how to play Trump trade policy: the "TACO Trade." But investors have mixed opinions about whether it's a safe bet.