“Short essays” appear to be causing big problems in China’s bond market. Over the past year the term has been used to refer to rumours swirling around financial hubs, which often originate with brief posts on social media that attempt to explain the inner workings of the system. One such rumour claims that the central bank is hunting down speculators who have made “illegal transactions” on the bond market. Another implies the China Financial Futures Exchange, where bond futures are bought and sold, has ratcheted up fees in order to discourage trading.

This article appeared in the Finance & economics section of the print edition under the headline “When will something break?”