Zillow (Z -1.4%), hit hard by Citron Research last week, is slipping after Barclays' Mark May starts coverage with an Equal Weight. May touts Zillow's ability to address a U.S. residential real estate market that sees $1T/year in transactions and $7B/year in agent/broker marketing spend, but considers all of this baked in at current levels. Yelp (YELP +2.3%) is also being started at Equal Weight on valuation grounds, but is trading higher nonetheless. A quarter of Yelp's float remained shorted as of Sep. 14.