A bump stock. Photo: George Frey via Getty Images

The Trump administration has officially made bump stocks illegal, nine months after taking steps to ban them by issuing federal guidelines prohibiting "devices that turn legal weapons into machine guns," CNN reports.

The big picture: The new regulation defines bump stocks as attachable devices that "allow a shooter of a semiautomatic firearm to initiate a continuous firing cycle with a single pull of the trigger." Owners will be required to turn them in 90 days after the rule becomes law. Bump stocks faced national backlash last year after a gunman used them to modify his weapons and kill 59 people at an outdoor concert in Las Vegas.

Go deeper

Updated 40 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Global: Total confirmed cases as of 6 p.m. ET: 13,203,571 — Total deaths: 575,201 — Total recoveries — 7,331,068Map.
  2. U.S.: Total confirmed cases as of 6 p.m. ET: 3,407,798 — Total deaths: 136,252 — Total recoveries: 1,031,939 — Total tested: 41,004,275Map.
  3. Politics: Biden welcomes Trump wearing mask in public but warns "it’s not enough"
  4. Public health: Four former CDC heads say Trump's undermining of agency puts lives at risk — CDC director: U.S. could get coronavirus "under control" in 4–8 weeks if all wear masks.

Bank CEOs brace for worsening economic scenario

JPMorgan CEO Jamie Dimon. Photo: J. Lawler Duggan/For The Washington Post via Getty Images

Wells Fargo swung to its first loss since the financial crisis — while JPMorgan Chase and Citigroup reported significantly lower profits from a year earlier — as the banks set aside billions of dollars more in the second quarter for loans that may go bad.

Why it matters: The cumulative $28 billion in loan loss provisions that banks have so far announced they’re reserving serves as a signal they’re preparing for a colossal wave of loan defaults as the economy slogs through a coronavirus-driven downturn.

1 hour ago - Health

Moderna's vaccine spurred immune system response to coronavirus

Moderna's stock rose 16% after hours on this news. Photo: Jakub Porzycki/NurPhoto via Getty Images

Healthy volunteers who took Moderna's coronavirus vaccine candidate appeared to generate an immune system response to the virus, and there were "no trial-limiting safety concerns," according to a new study published in the New England Journal of Medicine.

Why it matters: The phase one trial is still small and does not definitively determine how effective the vaccine is. But Anthony Fauci of the National Institutes of Health, which is running the trial, told the Wall Street Journal that these data make it "pretty clear that this vaccine is capable of inducing quite good [levels] of neutralizing antibodies."