Saga of US-listed Chinese groups

Shares in Chinese companies listed in the US continue to fall after the Securities and Exchange Commission launched administrative proceedings against the Chinese affiliates of the big four auditors - Deloitte, Ernst & Young, KPMG and PwC - and BDO for refusing to produce audit papers on Chinese businesses under investigation for possible accounting fraud. Lex's Robert Armstrong and Julia Grindell discuss the dilemma for investors left hanging on to US-listed Chinese groups.