Myriad Genetics ( MYGN) rated new Sell at Goldman Sachs. Company is facing decelerating growth. $17 price target. Netflix ( NFLX) downgraded at Needham from Hold to Underperform, Needham & Company said. AMZN strategy will add increased competition. Pinnacle West ( PNW) upgraded at Goldman from Neutral to Buy, Goldman Sachs said. $45 price target. Estimates also boosted, as the company is seeing higher solar and renewables demand. PRX ( PRX) initiated at Barclays with an Overweight rating. Zymafos in stage III is attractive , Barclays said. 2010 and 2011 EPS estimates set at $0.73 and $0.67, respectively. SMART Technologies ( SMT) downgraded at Credit Suisse to Neutral from Outperform on unpredictable revenue, and high expectations, Credit Suisse said. Price target slashed to $9 from $13.50. Youku.com ( YOKU) upgraded at Goldman from Neutral to Buy, Goldman Sachs said. Rapid growth in viewing TV and movies online will boost sales and margins. $40 price target.