Late Thursday's disclosure that Penn West Petroleum (PWE -3.8%) Vice Chairman Allan Markin had...

|About: Penn West Petroleum Ltd. (PWE)|By:, SA News Editor

Late Thursday's disclosure that Penn West Petroleum (PWE -3.8%) Vice Chairman Allan Markin had resigned struck National Bank Financial as "rather suspicious," noting Markin only joined the board in May amid high turnover in PWE's executive suites and boardroom. Dundee cited the resignation in downgrading shares to Sell from Neutral. PWE didn't give a reason for the departure.