BlackRock fell by 3.08% to trade at $393.13 by 09:33 (14:33 GMT) on Thursday on the NYSE exchange.
The volume of BlackRock shares traded since the start of the session was 31.17K. BlackRock has traded in a range of $393.13 to $399.78 on the day.
The stock has traded at $438.2600 at its highest and $392.0100 at its lowest during the past seven days.
