Auriga has reversed its call after last week’s selling, upgrading SunPower (SPWRA) from Sell to Hold.  “Shares of SPWRA are now trading below our price target of $15 and are essentially 1.0x book value of $14.26.”  The firm expects the company’s presentation following its earnings report tomorrow to be optimistically bullish.  While demand for solar continues to improve, the still believe that margins will erode due to increasing competition and maintain the $15 price target.  … Read the rest