Bedrock Wall Street Rules Threatened by Supreme Court Ruling

  • SEC among agencies affected by rolling back Chevron deference
  • Industry push against regulator gets lift from court decision
The US Supreme Court in WashingtonPhotographer: Nathan Howard/Bloomberg
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Wall Street is poised to win more battles with the US Securities and Exchange Commission after the Supreme Court weakened a decades-old legal doctrine that gave federal agencies expansive leeway to interpret the law.

The high court’s 6-3 decision may turbocharge challenges to the agency’s efforts on everything from crypto to insider trading. The new limits add to a string of court setbacks for Chair Gary Gensler as the SEC moves to implement some of the most comprehensive — and controversial — regulations in decades.