Notable Analyst Rating Changes 10/24: RTN, BG, HD, DO Upgraded; NOV, LVLT, AFFX, ZMH Downgraded Oct 24, 2008 10:06AM
Notable Analyst Rating Changes 9/18: HOC, PTR, CLR, NOV Upgraded; TGT, NT, KSS, CLI Downgraded Sep 18, 2008 09:49AM
Stanford Upgrades National Oilwell Varco (NOV) to Buy Sep 18, 2008 09:39AM