Today's noteworthy initiations include: Callon Petroleum (CPE) initiated with an Overweight at KeyBanc... Chemours (CC) initiated with a Neutral at Citi... Chico's (CHS) initiated with a Hold at BB&T... Diamondback Energy (FANG) initiated with an Overweight at KeyBanc... Express (EXPR) initiated with a Hold at BB&T... Gastar Exploration (GST) initiated with a Market Perform at Wells Fargo... Invitae (NVTA) initiated with a Market Perform at William Blair... Laredo Petroleum (LPI) initiated with a Sector Weight at KeyBanc... Ophthotech (OPHT) coverage assumed with an Outperform at Oppenheimer... Parsley Energy (PE) initiated with an Overweight at KeyBanc... RSP Permian (RSPP) initiated with an Overweight at KeyBanc... Radius Health (RDUS) initiated with a Buy at Deutsche Bank... Trovagene (TROV) initiated with an Outperform at Leerink... Viavi (VIAV) assumed with an Outperform at William Blair... Whole Foods (WFM) initiated with a Sell at Pivotal Research.