Barclays analyst Paul Cheng double downgraded CVR Refining to Underweight from Overweight citing the news that Icahn Enterprises has sold 250,000 common units, which triggered the clause in the General Partner agreement that the ownership threshold for the General Partner's call right has been permanently reduced to 80% from 95%. If at any time the General Partner and its affiliates own more than 80% of the common units, the General Partner will have the right to purchase all of the common units held by third parties at market price, the analyst points out. He cut his price target for CVR shares to $6 from $8.