Per Bloomberg: BlackRock, $BLK, lost the largest amount of money lost by a single firm over a six-month period in July. In the first half of this year, it lost $1.7 trillion of clients' money.
At the end of June, only a quarter of its asets were able to beat a benchmark.
BlackRock saw clients pull more than $20 billion during the first have of the year due to a collapse in bond markets.
See Bloomberg for full details.