** Shares of JetBlue Airways JBLU down 2% and Frontier Group Holdings 
ULCC down 3% premarket after Deutsche Bank trims rating on stocks to “hold” from “buy”
** Brokerage says both airlines are exposed to potential pockets of weakness in domestic demand
** “While we continue to remain constructive on the supply backdrop – which we still believe is favorable – our attention has shifted to what appears to be an emerging economic “soft patch”” – brokerage
** As of last close, JBLU down 17.8%…
