Searches for “Shanghai Composite” were blocked from China’s most-used microblogging service after

Searches for “Shanghai Composite” were blocked from China’s most-used microblogging service after the stock index’s drop on the 23rd anniversary of the Tiananmen Square crackdown corresponded to the date of the event.

The benchmark Shanghai Composite Index dropped by 64.89 (SHCOMP) points, matching the date on which Chinese authorities crushed student-led protests on June 4, 1989. Queries for “Shanghai Composite” on Sina Corp.’s Twitter-like Weibo service returned a message that said results can’t be displayed “in accordance with relevant laws, regulations and policies.”

China strictly prohibits references to the crackdown, in which hundreds of protesters were killed by troops, as part of the government’s censorship of websites, newspapers and television that bars criticism of the ruling Communist Party. This year, authorities are also trying to ensure a smooth leadership transition scheduled for later in 2012 and seeking stability after the suspension of Politburo member Bo Xilai.

via bloomberg.com