Shake Shake Shake: The Shack Shack Metaphor By: TalkMarkets May 26, 2015 at 20:00 PM EDT Something shaky with Shake Shack - its valuation as a metaphor for, or symptomatic of, a larger issue with the market, the economy and what is ailing us right now. Read More >> Related Stocks: Chipotle Mexican Grill McDonald's Corp Shake Shack Inc