By Nina Mehta and Whitney Kisling (Corrects when NYSE trading curbs began in first paragraph after “NYSE’s System” subhead.) June 4 (Bloomberg) — The U.S. Securities and Exchange Commission delayed trading curbs for Standard & Poor’s 500 Index stocks when they rise or fall 10 percent in five minutes, saying they will be implemented within two weeks. The announcement was made in an e-mailed statement. NYSE Euronext said earlier today that it won’t start its trial of the system on June 7 because it hadn’t received SEC authorization. Nasdaq OMX Group Inc., based in New York, is prepared to introduce circuit breakers on the S&P 500 companies it lists on June 14, pending SEC approval, spokesman Robert Madden said. Regulators asked stock exchanges to impose coordinated trading pauses following the May 6 rout that erased $862 billion from U.S. equities in less than 20 minutes. The SEC and Commodity Futures Trading Commission proposed six potential causes of the crash 12 days later, including curbs that applied at the New York Stock Exchange and not elsewhere. “The majority of work needed on the circuit breaker needed to be done by the listing exchanges,” said William Karsh , chief operating officer of Direct Edge Holdings LLC in Jersey City, New Jersey. His firm is converting two U.S. trading stock venues into exchanges. “We’re prepared to go forward as soon as they are,” he said. Dow Falling 10% Stock exchanges on May 18 proposed methods to halt trading across their markets when a stock in the S&P 500, the benchmark index for U.S. equities, moves 10 percent in five minutes. When a stock hits that threshold, its trading would be paused for five minutes. That would supplement existing rules, including a halt when the Dow Jones Industrial Average falls 10 percent from the previous day’s closing price. Credit Suisse Group AG said the circuit breakers suggested by exchanges should be broadened to more stocks and operate throughout the day. They should also lead to a 10-minute halt in trading instead of a 5-minute pause, according to a letter the firm sent the SEC today. The document hasn’t been posted on the agency’s website yet. “We think a ten-minute halt would be a reasonable compromise: long enough to allow humans time to make rational decisions, while still short enough to avoid overly disrupting the markets,” the Zurich-based brokerage wrote. Less than that wouldn’t give investors enough time to conduct “meaningful analysis and understand the reasons behind a sudden price drop, and then make a rational decision to buy or sell,” it said. Identical Curbs Nasdaq ’s chief executive officer said today that equities and derivates exchanges in the U.S. need to adopt the same trading curbs in response to last month’s plunge. “We believe there should be one set of unified circuit breakers,” Robert Greifeld , the chief executive officer of New York-based Nasdaq, told reporters in New York today. “That uniform set of circuit breakers shouldn’t be just in the cash markets but should include futures markets.” Nasdaq said on June 2 that it would also introduce a mechanism to pause trading in all companies listed on its market if shares rise or fall a set amount that varies based on share prices in 30 seconds. The program, which would begin in the third quarter, would only apply on the Nasdaq Stock Market. The shares could continue to trade elsewhere. NYSE’s System NYSE Euronext’s New York Stock Exchange has had a system in place since 2006 that slows down trading if a stock moves rapidly. NYSE holds automated auctions to gather buy and sell orders and determine a price based on that demand. These auctions can take place in less than a second or after trading has paused for half a minute or more. Greifeld said uncertainty about what markets including CME Group Inc. ’s Chicago Mercantile Exchange, the world’s largest futures market, will do when markets swing should be eliminated. CME is regulated by the CFTC, not the SEC. “We have to think first and foremost about our issuers,” Greifeld said. Companies want assurance that the prices of their shares are not arbitrary or unrelated to the value of the firms, he said. Nasdaq will end the pause after one minute. Greifeld also said his firm plans to modify rules to eliminate stub quotes, which are bids and offers that some have blamed for exacerbating the May 6 plunge in U.S. stocks. 12,300 Trades Canceled Some stocks fell to pennies that day as sell orders executed against stub quotes. Brokers can set those as low as a 1 cent a share because they’re never expected to be used. Nasdaq canceled about 12,300 trades from 2:40 p.m. to 3 p.m. on May 6, or 59.3 percent of the total number of voided transactions across markets. NYSE, which already had volatility curbs in place, voided no trades. The goal over the “short term is to have stub quotes be replaced by quotes that are realistically priced to the market at the time,” Greifeld said during an interview with reporters today. Companies such as Accenture Plc traded for 1 cent on May 6. One way to avoid this could be to require market makers to quote “within 15 percent of the market,” he said. Some brokers and algorithms send orders into the market that shouldn’t have been submitted on May 6, he said. These included “dumb sell-short orders” and other requests to sell shares at a “dumb price,” he said. To contact the reporters on this story: Nina Mehta in New York at nmehta24@bloomberg.net ; Whitney Kisling in New York at wkisling@bloomberg.net .






