While the initial news of the U.K. raising the terror threat level to "severe" based on new intelligence was first reported at 9:24 EST, the market didn't react negatively until British Prime Minister David Cameron began talking at 9:50 a.m. ET.
The S&P 500 futures, which had made an all-time high before the opening at 2003.75, have subsequently fallen back below the psychologically key 2000 level.
Volume is light in front of the three-day Labor Day weekend.
Original headline: S&P 500 Futures Back Below 2000 After British Terror Level Raised To 'Severe'
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