Threats to market stability

It is absolutely critical that the market on which investors buy and sell stock be stable and reliable. But they are under threat from computerized "algorithmic" buying and selling, high-frequency trading, and other Wall Street creations.

NYSE temporarily suspends trading due to technical glitch

Traders work on the floor of the New York Stock Exchange, June 29, 2015.
Reuters/Lucas Jackson

U.S. stock index futures fell on Wednesday as a rout in Chinese markets deepened and as investors continue to keep a wary eye on developments in the Greek debt crisis.

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Fake Liquidity Prompts European Probe Into High-Speed Trading

By Eduard Gismatullin Jan 21, 2015 6:10 AM ET

The European Union is investigating whether high frequency traders provide liquidity that benefits financial markets as a whole in the 28-nation bloc.

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Weary of the market rollercoaster, investors turn again to steady stocks

An investor reacts in front of an electronic board showing stock information at a brokerage house in Taiyuan, Shanxi province, May 9, 2013.

Credit: Reuters/Jon Woo

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NYSE cancelling Home Depot trades below $93.33

Nov 18, 2014 4:46 p.m. ET - WASHINGTON (MarketWatch) -- The New York Stock Exchange is cancelling all Home Depot HD, +0.73% trades executed at or below $93.33 between 3:55 p.m. and 3:56 p.m. Eastern. The component of the Dow Jones Industrial Average dropped as low as $86.52 before bouncing back, closing at $95.98. The NYSE didn't explain the sudden drop. The ruling only impacts trades made on the NYSE, though it doesn't appear any other exchange saw the same movement in Home Depot.



How the Robots Lost: High-Frequency Trading's Rise and Fall

Published: June 06, 2013
By: Matthew Philips, BusinessWeek

Steve Swanson was a typical 21-year-old computer nerd with a very atypical job. It was the summer of 1989, and he'd just earned a math degree from the College of Charleston. He tended toward T-shirts and flip-flops and liked Star Trek: The Next Generation. He also spent most of his time in the garage of his college statistics professor, Jim Hawkes, programming algorithms for what would become the world's first high-frequency trading firm, Automated Trading Desk.

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U.S. Indices

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