Just what proportion of trials are kept under wraps is unclear - one of Donald Rumsfeld's known unknowns - but a 2010 study from the National Institute of Health Research suggests that half are never published, and those with positive results twice as likely to get into print.

BBC: Trust of medical volunteers 'betrayed'

At this point a two percent print is enough to keep more people positive than negative, but not enough for businesses to start hiring again.

FORBES: U.S. GDP At 2%, Economy Continues On Treadmill

In China, the last flash PMI print was 49.3 from HSBC and will struggle to come in at 50, a positive for the market if it does.

FORBES: Don't Expect Strong China PMI Thurs

She said that "we support this Day to emphasize the importance of freedom of expression and free flow of diversified opinions because Media - old and new, print or broadcasting, text-based or visual - have an increasingly important power to boost dynamic and positive change, positive social transformation in the country".

UNESCO: COMMUNICATION & INFORMATION