KEY POINTS
  • Block shares plunged after noted short seller Hindenburg Research said the company's flagship Cash App facilitates crime and lacks strong compliance controls.
  • Hindenburg has targeted other companies before, including Indian conglomerate Adani Group.

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Shares of Jack Dorsey's Block plunged nearly 15% by Thursday's close after short seller Hindenburg Research announced that the payment company was its latest short position, alleging that Block allowed criminal activity to operate with lax controls and "highly" inflates Cash App's transacting user base, a key metric of performance.

Hindenburg described Block's internal systems as a "'Wild West' approach to compliance."

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