257 essays 1,087 funds measured independent · not paid by any fund or issuer we cover

Fund · DoubleLine Mortgage ETF · measured from SEC filings

DMBS holdings

DMBS reports 190 holdings and behaves like 38.8 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-06-30. The fact sheet publishes the first number; this page computes the second, and traces it across 13 quarters of filings.

Measured concentration

as of 2026-06-30
190 Positions reported
38.8 Effective holdings
4.9× Concentration multiple
33.56% Top ten weight

Computed by this site from the fund's SEC Form N-PORT filing; what the measure does not tell you · every fund in one table · hold it with other funds? X-ray the mix. Pricing: 3.64% at a quoted market price (level 1), one issuer country.

What stands out

as of 2026-06-30

DMBS's largest investment is Umbs, Single Family, 30 Year at 15.14% of net assets. Umbs, Single Family, 30 Year and JPMorgan U.S. Government Money Market Fund - Class IM follow; the three together are 25.33%. Ten companies are 33.56% of the fund; the other 180 share the rest. Among the 15 mortgage-backed funds measured here, DMBS behaves like 38.8 holdings against a median of 157.5 — 4.0 times more concentrated than the median. Across 13 quarterly filings DMBS has become less concentrated: it behaved like 19.3 at 2023-06-30 and 38.8 at 2026-06-30. Between the 2026-03-31 and 2026-06-30 filings 22 positions were added and 25 dropped; 40.4% of the weight moved.

Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable mortgage-backed funds on this site. Nothing here is a view on the fund.

Every filing since 2023

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Between 2023-06-30 and 2026-06-30, DMBS went from behaving like 19.3 equally weighted positions to 38.8 — 101% more, while its top ten went from 56.03% to 33.56% of net assets. Read across the funds on the concentration-over-time table.

PeriodHoldingsEffective Top 10Largest
2026-06-30 190 38.8 33.56% 12.12%
2026-03-31 * 191 61.9 27.67% 7.42%
2025-12-31 * 177 69.8 25.33% 6.47%
2025-09-30 * 164 82.5 22.77% 3.19%
2025-06-30 142 58.9 28.38% 6.29%
2025-03-31 128 58 29% 5.55%
2024-12-31 123 56.8 29.59% 6.17%
2024-09-30 118 49.6 30.63% 8.48%
Earlier filings (5 more, back to 2023-06-30)
PeriodHoldingsEffectiveTop 10Largest
2024-06-30 106 62.5 26.9% 4.61%
2024-03-31 103 64.7 25.63% 3.32%
2023-12-31 84 56.3 28.32% 3.9%
2023-09-30 47 32.4 44.44% 5.6%
2023-06-30 37 19.3 56.03% 12.2%

One row per filed reporting period, newest first, read from EDGAR. Quarterly because that is the public filing cadence. Rows marked * are published but held out of the comparison above; the methodology page says when and why.

Largest positions, as filed

as of 2026-06-30

The 15 largest of 190 positions in DMBS's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: DMBS.csv.gz.

#PositionWeightCumulative
1FNMA or FHLMC12.12%12.1%
2FNMA or FHLMC4.60%16.7%
3JPMorgan U.S. Government Money Market Fund3.56%20.3%
4FNMA2.33%22.6%
5FHLMC Pool2.18%24.8%
6FHLMC Pool1.90%26.7%
7FHLMC Pool1.77%28.5%
8FHLMC Pool1.72%30.2%
9FNMA1.72%31.9%
10FHLMC Pool1.65%33.6%
11FNMA1.62%35.2%
12FNMA1.59%36.8%
13FNMA1.54%38.3%
14FNMA1.53%39.8%
15FHLMC Pool1.49%41.3%

Returns the fund reported

2023-04 – 2026-06

Monthly total returns from Item B.5 of DMBS's own filings, 39 months on record. Not computed here and not from a price feed.

5.2%Last twelve months filed
14%Whole series, compounded
4.7%Best month
-2.9%Worst month

Cross-checked against a series computed separately from prices: median difference — percentage points over 0 months, which is roughly the distributions. Every month with the filing it came from: DMBS.json · all funds.

Since the previous filing

2026-03-31 → 2026-06-30

190 positions became 187: 22 added (40.3% of the fund at the later date), 25 dropped (33.9% at the earlier date). Half the sum of all weight changes, a turnover proxy: 40.4%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of DMBS compared this way, as a feed: changes.xml · all funds: filings received.

Largest increases2026-03-312026-06-30Largest decreases2026-03-312026-06-30
JPMorgan U.S. Government Money Market Fund3.45%3.56% FNMA1.72%1.48%
FHLMC Pool1.67%1.49%
FHLMC Pool1.40%1.24%
FNMA1.64%1.48%
FNMA1.71%1.54%
N/A0.23%0.08%

New: FNMA or FHLMC (12.12%), FNMA or FHLMC (4.60%), FNMA (2.33%), FHLMC Pool (2.18%), FHLMC Pool (1.90%), FHLMC Pool (1.77%). Gone: FNMA or FHLMC (7.42%), FNMA or FHLMC (4.21%), FNMA (2.05%), FNMA (2.01%), FHLMC Pool (1.66%), FNMA or FHLMC (1.60%).

Asset categories and pricing

as of 2026-06-30
Asset category (as filed)Share of investments
mortgage-backed ABS-MBS96.36%
short-term investment STIV3.56%
DIR DIR0.08%

3.6% of DMBS is carried at a quoted market price (fair-value level 1). Categories and levels are the filer's, from Form N-PORT; what a low level-1 share does and does not mean is in the measure's page.

Derivative exposure and counterparties

as of 2026-06-30

A position count cannot describe a fund that uses derivatives, because a swap is filed at its unrealised gain, not its exposure. These are the notionals the fund itself reported, against net assets of $705M. Notional of an interest-rate or currency swap is not equity exposure.

0%Stocks held directly
0%Swap notional (0)
-12.48%Futures notional (5)
-12.5%Sum, % of net assets

Full detail for every fund that files derivatives: leverage.json (CC BY 4.0).

Neighbours by effective holdings, mortgage-backed funds

6

Every measured mortgage-backed fund lined up by how many holdings it behaves like; these sit either side of DMBS (38.8). Same filings, same arithmetic. Position in this list says nothing about which fund is better.

FundReportsBehaves likeTop tenAs of
MTBA Simplify MBS ETF 13 3.7 99.11% 2026-06-30
JMBS Janus Henderson Mortgage-Backed Securities ETF 623 44.8 35.52% 2026-07-31
JSI Janus Henderson Securitized Income ETF 582 70.8 26.23% 2026-07-31
BOND PIMCO Active Bond Exchange-Traded Fund 1,815 83.2 * 28.37% 2026-06-30
XAGG Eaton Vance Income Opportunities ETF 857 91.7 * 25.55% 2026-06-30
FSEC Fidelity Investment Grade Securitized ETF 1,075 94.2 27.76% 2026-05-31

Essays that examine DMBS

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Mentions are detected across the full text of every article, so an appearance may be a passing comparison rather than the subject. Nothing here is a recommendation to buy or sell — see the disclaimer.