Summary Box: Web portal Sina posts quarterly loss

THE RESULTS: Sina Corp., a popular Chinese Web portal operator, had a loss of $336 million in the latest quarter.

BEHIND THE NUMBERS: The chief reason was writedowns on investments in two online businesses ? China Real Estate Information Corp. and online clothing retailer Mecox Lane Ltd.

GOOD NEWS: Advertising revenue rose 25 percent to $101 million. Sina’s popular microblog,, saw unspecified growth in users.