Sina (SINA -3.3%) is heading lower in early trading. Sohu's guidance could be weighing on...

|About: Sina Corporation (SINA)|By:, SA News Editor

Sina (SINA -3.3%) is heading lower in early trading. Sohu's guidance could be weighing on shares, but so might the company's 20-F, released late on Friday. In the filing, Sina warns it could face "severe punishment" from Chinese authorities over its inability to verify the identities of all Weibo users, as is now required, and that near-term enforcement of the mandate could "severely" hurt traffic.