Nasdaq building in Times Square Rick Gershon/Getty Images
Nasdaq building in Times Square

This Heat Wave's So Bad It's Even Slowing Down US Stock Trades

High-speed traders on the US East Coast are seeing slower trades as a result of the weather • High humidity caused by the heatwave in the New York City area is slowing down radio transmission between three New Jersey data centers where US stocks trade • Nasdaq sent a note to customers saying it's taking 8 microseconds longer to send information from its data center in Carteret to the NYSE data center in Mahwah, and an extra 2 microseconds to send data to the Cboe Global Markets exchange in Seacaucus, Bloomberg reported

Nick Baker (Bloomberg) -- The swampy heat wave pummeling the New York City area is slowing everybody down -- and high-speed traders are no exception.

High humidity is impeding radio transmissions Tuesday among three New Jersey data centers where US stocks trade, according to a note Nasdaq Inc. sent customers. It’s taking about 8 microseconds longer to send information from Nasdaq’s facility in Carteret to the New York Stock Exchange data center in Mahwah, and an extra 2 microseconds to send data to Cboe Global Markets Inc.’s exchange in Secaucus.

Northern New Jersey is under an excessive heat warning Tuesday, with temperatures in Carteret exceeding 90 degrees Fahrenheit (32 degrees Celsius) and humidity around 60 percent.

A microsecond -- or one-millionth of a second -- means nothing to humans, but for computer-driven trading firms it’s practically an eternity in an era when transactions are often measured in billionths of a second. The good news for high-speed traders: U.S. markets shut three hours -- 10.8 billion microseconds -- early today before tomorrow’s July 4 holiday.

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