Short-sellers must now notify the market when a net short position on a European stock reaches 0.5 per cent of the issued share capital of the company concerned and again at each 0.1 per cent increment after that. Then the information on UK stocks goes on the FSA’s website (in a particularly hard to use format).
But disclosures so far indicate that the new rules are missing a significant chunk of short-selling activity. Data from Markit suggests that, for example, Lonmin has around 17 per cent in undisclosed short interest. Read more

1Bernanke weighs in on robot wars; brings Keynes for backup
2About China's capacity to absorb more capital
3Secret liquidity and Scottish independence
4Spain's awful unemployment
5Pump up, debase
Show more6S&P 2,100, by Goldman Sachs
7Buyback to enrich
8Everlasting credit, the long view
9Apple Operations International, facts (?) du jour
10Collateral crunch-counting gets sophisticated
Show fewer