 Oil-linked stocks see mass of downgrades on potential Energy Armageddon HAL SLB HP HLX CLB FET WHD AMNA APA CHK DVN OVV EOG MRO OXY CDEV CPE ESTE FANG MTDR PE PXD REI ROSE WPX XEC CLR ERF NOG WLL MGY WTI SM PDCE NBL BCEI AXAS VET AM ENLC ET OKE PAA PAGP TELL TRGP BRY GPOR QEP 