Traders work on the floor of the New York Stock Exchange on Tuesday. Photo: Spencer Platt / Getty Images

"Lightning-fast trading models, automated sell orders and an arsenal of sophisticated algorithms ... are likely to have made a crazy trading day that much crazier," the WashPost reports:

Why it matters: "The computers react to evidence exponentially faster than any human — think millionths of a second, instead of minutes — and can move en masse, trading at high volumes around the world. That makes them potentially ... dangerous."

  • "If an algorithm appears to sell rashly or emotionally, analysts said, it is because a human taught it to do so."
  • "Some use their mathematical speed to exploit tiny fluctuations in price, buying and reselling within a fraction of a second."
  • "Others attempt to predict how markets will move by analyzing a torrent of data points, including indicators in labor-market news releases and the wording of politicians’ speeches."

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Florida Gov. Ron DeSantis (R) announced Friday the state will completely reopen its economy, allowing restaurants at operate full capacity and barring localities from ordering businesses to close.

Why it matters: The state became one of the world's epicenters for the virus in July, forcing DeSantis to pause its first round of reopening.

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Gasoline-powered cars may be going the way of the woolly mammoth, even if it will take decades to replace them and seems hard to fathom today.

The big picture: Internal combustion engines (ICEs) have powered automobiles for more than 100 years. But the shift to electric vehicles, slow to materialize at first, is now accelerating due to tightening government policies, falling costs and a societal reckoning about climate change.

Virginia Gov. Ralph Northam tests positive for coronavirus

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Virginia Gov. Ralph Northam (D) and his wife, Pamela, both tested positive for coronavirus, his office announced on Friday.

The state of play: The Northams were tested after one of their staff "who works closely within the couple's living quarters" tested positive. The governor is asymptomatic, while his wife is "experiencing mild symptoms." They plan to isolate at home for 10 days.

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