Get a jump start on the US trading day with Matt Miller, Katie Greifeld and Sonali Basak on "Bloomberg Open Interest." JPMorgan is raising its Sapphire Reserve fee to nearly $800 as credit card wars heat up. Plus, Jetblue is struggling thanks to softer-than-anticipated travel demand. The carrier is eliminating flights, pausing retrofits and parking some jets in an overhaul. And Nassim Taleb, the famed quant trader, Author of "The Black Swan", and Senior Scientific Advisor for Universa