As reported earlier, SunTrust analyst Neal Dingmann downgraded Oasis Petroleum to Sell from Hold on valuation as part of his Q1 preview for companies with exposure to the Bakken Basin. Dingmann notes that while the company's core Bakken "acreage represents some of the best in the basin", he sees its Delaware basin program frac spread underperformance requiring the company to "sacrifice high-return Bakken development for Delaware drilling and completion". However, the analyst is positive on Whiting Petroleum (WLL), raising its price target to $60 from $44 and Continental Resources (CLR), raising its price target to $80 from $75, saying the Bakken well economics observed last year make those companies an "attractive alternative" to the Permian.