Mar 1, 2013 08:14AM JPMorgan Upgrades Westlake Chemical (WLK) to Overweight
Jun 22, 2012 07:30AM JPMorgan Resumes Coverage on Westlake Chemical (WLK) at Neutral
May 13, 2011 07:42AM JPMorgan Upgrades Westlake Chemical (WLK) to Overweight
Oct 6, 2010 07:35AM J.P. Morgan Downgrades Westlake Chemical (WLK) to Neutral
Mar 30, 2010 07:41AM J.P. Morgan Upgrades Westlake Chemical (WLK) to Overweight