Merc says buy orders caused spikes
(Reuters) â The Chicago Mercantile Exchange said on Monday an unusual spike in several stock index futures contracts on its overnight Globex trading platform was the result of legitimate buy orders and not trading errors.
Trading sources said U.S. futures reversed course toward the open on Monday and turned lower on a technical reversal of apparently errant trades made Sunday night.
"The December Standard & Poor's 500 futures, the E-mini S&P futures, the E-mini Russell futures and the E-mini Nasdaq futures all had big moves in overnight trading due to buy orders," said CME spokeswoman Mary Haffenberg.
"There were no errors and no trades were busted. These trades were good and stand," she said.
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The spokeswoman noted the big moves in these contracts occurred right after 5:30 p.m. Chicago time on Sunday.
One S&P futures trader noticed just before the Asian market opened near 5:30 p.m. Chicago time on Sunday that the S&P market took off and went up to 1,399 and 1,398 in the mini S&P futures.
"CME left all trades as is," he said. "Normally you would not see an aberration in one market spilling into the other markets in overnight trade. But because there are computer generated programs tied to spreads or arbitrage between futures and E-minis or between the futures indexes, the markets would experience the same blip."
The mini contracts are a smaller electronic version of the standard futures contracts. For example, the S&P E-mini contracts are one-fifth the size of the standard S&P 500 futures. Both futures contracts are based on the Standard & Poor's 500 index.
Mini stock contracts have seen explosive growth in recent years as day traders, individual investors and institutions are attracted to their liquidity.
Average trading volume of mini S&P futures is more than 1 million contracts a day. By contrast, S&P 500 futures contracts trade about 60,000 contracts a day. Year-to-date S&P mini volume was up 24%.
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