UPDATE: Stifel Nicolaus Downgrades Jiayuan.com to Hold

Stifel Nicolaus lowers its rating on Jiayuan.com DATE to Hold on competition concerns and challenges to mobile growth. Stifel Nicolaus says, "We are downgrading the shares of Jiayuan.com from Buy to Hold as a result of weak 4Q11 results, growing competitive challenges and higher mobile registrations which dilute conversion ratios to active users and paying users. We continue to believe that Jiayuan.com management is strong and visionary, but faces challenges in the industry including competition from free classifieds websites and poor monetization of the mobile user base." DATE closed at $6.33 a share yesterday.