Notable Analyst Rating Changes 04/17: (TEX) (TNK) (NFX) Upgraded; (YPF) (FSLR) CSX) Downgraded Apr 17, 2012 10:37AM
BofA/Merrill Lynch Downgrades YPF S.A. (YPF) to Underperform Apr 17, 2012 06:50AM
BofA/Merrill Lynch Upgrades YPF S.A. (YPF) to Buy Nov 8, 2011 07:35AM
BofA/Merrill Lynch Downgrades YPF S.A. (YPF) to Underperform Oct 7, 2011 08:38AM