Shake Shack Inc (NYSE:SHAK) stock is down 3.1% to trade at 104atlastcheck,afterPiperSandlerdowngradedthefastfoodchainto"neutral"from"overweight,"andcutitspriceobjectiveto114 from 121.SharesarepullingbackfromtheirhighestlevelsinceMay,butstillsporta40.2102 region ready to contain any additional losses.What's more, the equity's recent peak comes amid historically low implied volatility (IV), which has been a bullish comb ...