KEY POINTS
  • Much of this week's market tumult arose from huge losses to exchange-traded products that work off volatility.
  • BlackRock, the biggest issuer in the world, says it does not offer such products and it wants greater regulation.

The world's largest money manager and exchange-traded fund provider is distancing itself from the products blamed for much of this week's tumultuous market activity.

BlackRock said it neither endorses nor provides the leveraged exchange-traded notes that tumbled as market volatility soared.