iShares MBS ETF
MBB
839 hedge funds and large institutions have $26.7B invested in iShares MBS ETF in 2024 Q1 according to their latest regulatory filings, with 87 funds opening new positions, 391 increasing their positions, 277 reducing their positions, and 90 closing their positions.
320% more call options, than puts
Call options by funds: $80.3M | Put options by funds: $19.1M
41% more repeat investments, than reductions
Existing positions increased: 391 | Existing positions reduced: 277
2% less capital invested
Capital invested by funds: $27.3B → $26.7B (-$614M)
3% less first-time investments, than exits
New positions opened: 87 | Existing positions closed: 90
2.06% less ownership
Funds ownership: 94.83% → 92.77% (-2.1%)
2% less funds holding
Funds holding: 857 → 839 (-18)
10% less funds holding in top 10
Funds holding in top 10: 80 → 72 (-8)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jane Street
New York
|
+$658M |
| 2 |
Bank of Montreal
Toronto,
Ontario, Canada
|
+$141M |
| 3 |
State Street
Boston,
Massachusetts
|
+$110M |
| 4 |
SOMRS
State of Michigan Retirement System
Lansing,
Michigan
|
+$94.8M |
| 5 |
Bessemer Group
Woodbridge,
New Jersey
|
+$88M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
-$598M |
| 2 |
JP Morgan Chase
New York
|
-$460M |
| 3 |
Bank of America
Charlotte,
North Carolina
|
-$350M |
| 4 |
Osaic Holdings
Scottsdale,
Arizona
|
-$155M |
| 5 |
US Bancorp
Minneapolis,
Minnesota
|
-$135M |
MBB Hedge Fund Activity: Q1 2024 in Review
839 of the 6,942 institutional investors tracked by Wall St. Rank reported a position in iShares MBS ETF (MBB) for Q1 2024, worth a combined $26.7B — down 2.3% from $27.3B a quarter earlier.
Sellers outnumbered buyers: 90 funds closed out of MBB and 87 opened new positions — a net loss of 3 holders — while 277 trimmed existing stakes and 391 added.
The largest buyer was Jane Street, adding an estimated $658M. The largest seller was Morgan Stanley, cutting an estimated $598M.
- 839 institutional investors held iShares MBS ETF (MBB) as of Q1 2024, down from 857 in Q4 2023.
- Funds reported $26.7B of iShares MBS ETF stock for Q1 2024, down 2.3% quarter-over-quarter.
- 87 funds opened new iShares MBS ETF positions in Q1 2024 and 90 closed out, a net change of -3 holders.
- The largest iShares MBS ETF buyer in Q1 2024 was Jane Street, an estimated $658M added.
- The largest iShares MBS ETF seller in Q1 2024 was Morgan Stanley, an estimated $598M sold.
Based on aggregated 13F filings for Q1 2024.