On February 24, 2010, the SEC announced the adoption of a new short selling price restriction rule, and the final text of the new rule was officially released on February 26. The rule will amend Regulation SHO under the Securities Exchange Act of 1934 by adopting a short sale “circuit breaker” that will be triggered any time a stock experiences a price decline of at least 10% in one day. Once triggered, short selling in the stock will only be permitted at prices above the current national best bid.
This post summarizes the basic elements of the new rule, which represents the first short sale price restriction adopted by the SEC since it eliminated the former “uptick rule” in 2007.