While in the past the SEC might first talk directly to the suspected trader, the Commission now prefers to operate under the radar, first collecting trading data from various sources and investigating potential connections between those involved in the headlines.

FORBES: Was Warren Buffett's Heinz Acquisition Leaked? Suspicious Options Data Points To Yes (UPDATE: SEC Investigating?)

Besides collecting posts on various topics and allowing researchers to search the data in English, WeiboScope can also check the same post several times to see whether it becomes inaccessible.

WSJ: Watching How China Censors