In response to the "Flash Crash" / "Fat Finger" market plunge of May 6th, the SEC has enacted new trading rules and circuit breakers that are being phased in today.
Read the full press release at the SEC site
here.
"Under the rules,
trading in a stock would pause across U.S. equity markets for a five-minute period in the event that the stock experiences a 10 percent change in price over the preceding five minutes. The pause, which would a
pply to stocks in the S&P 500® Index, would give the markets the opportunity to attract new trading interest in an affected stock, establish a reasonable market price, and resume trading in a fair and orderly fashion. Initially, these new rules would be in effect o
n a pilot basis through Dec. 10, 2010. "
So the new changes apply to individual stocks only, and only those in the S&P 500 Index (SPX) (SPY) ... yet another indication that the SPX truly is the most important market index in U.S. trading.
As far as circuit breakers for the market itself, the SEC says this:
"The SEC staff is working with the markets to consider recalibrating market-wide circuit breakers currently on the books -
none of which were triggered on May 6. These circuit breakers apply across all equity trading venues and the futures markets."
What do you think? Will these changes help alleviate the problems, or is it only a minor fix that won't stop the volatility?