Traders who have sought to profit from the financial crisis by betting against bank stocks were attacked on two continents on Thursday.
The Securities and Exchange Commission is considering a temporary ban on short sales of some or all shares and an announcement could be made as early as Friday morning. Earlier Thursday, the S.E.C. scrambled to put together an emergency rule to force major investors to disclose their short sales daily.
In Britain, regulators announced new rules to bar short selling.
Short selling — a bet that a stock price will decline — is the practice of selling stock without owning it, hoping to buy it later at a lower price, and thus make a profit. It has often been blamed for forcing prices down in times of market stress, but the level of anger has intensified as the American government has been forced to bail out major financial institutions and the leaders of some investment banks have asked for action to protect their shares.
http://www.nytimes.com/2008/09/19/business/19backlash.html?_r=1&th&emc=th&oref=slogin