Ship Finance (SFL -10.8%) tumbles after Moody's slashes its debt rating to Ba3 from B1, sending it further into junk territory. The ratings agency is worried about Ship Finance's exposure to Frontline (FRO -7.2%), which recently crashed on liquidity fears. Also moving lower: TNK -5.3%. OSG -4.8%. PRGN -3.9%. DRYS -6.6%.