Apr 17, 2012 10:37AM Notable Analyst Rating Changes 04/17: (TEX) (TNK) (NFX) Upgraded; (YPF) (FSLR) CSX) Downgraded

Apr 17, 2012 06:50AM BofA/Merrill Lynch Downgrades YPF S.A. (YPF) to Underperform

Nov 8, 2011 07:35AM BofA/Merrill Lynch Upgrades YPF S.A. (YPF) to Buy

Oct 7, 2011 08:38AM BofA/Merrill Lynch Downgrades YPF S.A. (YPF) to Underperform