#US stock #futures decline as #Fed rate concerns linger. #MarathonOil $MRO up 7.4% on ConocoPhillips deal, #DickSportingGoods $DKS rises 8.2% with raised guidance, #Robinhood $HOOD climbs 2.1% with $1B buyback, while #AmericanAirlines $AAL falls 8.8% on lowered forecast.