Sabra Health sharply lower early after downgrade

• It's pretty thin volume, but Sabra Health Care REIT (SBRA -6.3%) tumbles in opening action after a downgrade to Underperform from Sector Perform at RBC Capital. The new $22 price target (from $26) compares to Friday's close of $22.68.
• The stock has been under pressure for a good part of the year, a combination of generally tough action in REITs and more recently the bankruptcy filing of one of the company's tenants.