BlackRock said it has teamed up with trading platform operator Tradeweb Markets to bring prices for bonds and derivatives into BlackRock's trading and risk management system.

Under the new alliance, about 40 securities and derivatives dealers in the Tradeweb network will post their prices for mortgage bonds, Treasurys and interest-rate swaps into the screens of BlackRock's Aladdin Trading Network. Previously, investors had gotten prices from outside Aladdin.