Columbia Strategic Income Fund
Actively managed U.S. bond fund
As of its 2026 Q2 report, Columbia Strategic Income Fund held 1,265 positions with $5.98B in net assets. Its ten largest holdings made up 23.2% of the fund. The COSIX share class costs 0.94% a year. Over the 12 months to May 2026, COSIX returned 5.2%, with dividends reinvested. In 2026 Q2 it added 137 new positions and exited 164.
Columbia Strategic Income Fund (the Fund) seeks total return, consisting of current income and capital appreciation.
The fund pursues total return by maintaining substantial exposure to fixed-income markets across all credit qualities and sectors, including government bonds, investment-grade and high-yield corporates, mortgage- and asset-backed securities, floating-rate loans, and foreign debt, with flexibility to shift allocations without targeting a specific duration or maturity. The manager employs derivatives including futures, swaps, and options to manage yield curve and duration risk, creating leverage in the portfolio. Because the fund's use of derivatives creates market exposure exceeding its assets, portfolio performance may diverge materially from movements in any single fixed-income benchmark.
What you own
| Company | Weight | Value | Shares | Reported price |
|---|---|---|---|---|
COLUMBIA SHORT TERM CASH FUND | 6.04% | $360.70M | — | — |
UMBS, TBA 5.00% · due 2056-06-01 | 3.34% | $199.70M | — | — |
UMBS, TBA 5.50% · due 2056-06-01 | 2.96% | $176.88M | — | — |
UMBS, TBA 4.00% · due 2056-06-01 | 2.73% | $163.36M | — | — |
UMBS, TBA 6.00% · due 2056-06-01 | 2.60% | $155.20M | — | — |
UMBS, TBA 4.50% · due 2056-06-01 | 1.62% | $96.95M | — | — |
Fannie Mae 3.50% · due 2052-05-01 | 1.06% | $63.21M | — | — |
UMBS, TBA 3.00% · due 2056-06-01 | 1.05% | $62.87M | — | — |
Columbia Short Duration High Yield ETF | 0.97% | $58.27M | 2.9M | $20.26 |
Fannie Mae 3.50% · due 2052-05-01 | 0.84% | $50.19M | — | — |
Reported price is the fund's own reported value divided by its own reported shares at 2026-05-31 — not a live quote, and not what the fund paid.
The 200 largest of 1,265 holdings, with the share counts as filed, open with a free account.
What the fund is made of
Percentages are of fund net assets. Rounding, liabilities and short positions can make totals differ from 100%.
| Securitized | 47.75% |
| Bonds | 46.84% |
| Loans | 15.50% |
| Cash & short-term | 6.06% |
| 2 smaller | 1.36% |
Look-through blends 1 underlying fund; 0.0% of NAV was not looked through and stays direct-classified.
By sector
- Securitized
- 40.6%
- Other
- 28.5%
- Government
- 8.0%
- International
- 6.7%
- 12 other sectors
- 16.1%
- Securitized
- 40.6%
- Other
- 28.5%
- Government
- 8.0%
- International
- 6.7%
- Cash
- 5.1%
- Financials
- 1.9%
- Energy
- 1.5%
- Information Technology
- 1.4%
- Communication Services
- 1.2%
- Industrials
- 1.1%
- Health Care
- 1.1%
- Utilities
- 1.0%
- Consumer Staples
- 0.8%
- Consumer Discretionary
- 0.7%
- Materials
- 0.4%
- Real Estate
- 0.0%
How it has done
COSIX share class · total returns with dividends reinvested
Volatility over the last 12 months: 2.84%. Past returns are a record, not a forecast.
The 8 share classes hold the same portfolio
| Share class | Expense ratio | 1 year | 3 years | 5 years | Worst fall |
|---|---|---|---|---|---|
| 0.94% | +5.17% | +21.03% | +10.32% | -3.45% | |
| 1.69% | +4.36% | +18.33% | +6.22% | -3.68% | |
| 0.69% | +5.42% | +21.99% | +11.70% | -3.41% | |
| 1.19% | +4.91% | +20.14% | +8.95% | -3.52% | |
| 0.65% | +5.44% | +22.09% | +11.90% | -3.39% | |
| — | — | — | — | — | |
| 0.60% | +5.55% | +22.31% | +12.25% | -3.40% | |
| 0.69% | +5.42% | — | — | — |
Fees & fund details
Columbia Strategic Income Fund is an actively managed U.S. bond fund.
- Asset class
- Bonds
- Region
- United States
- Management
- Actively managed
- Fund type
- Open-end fund
- Credit quality
- Mixed credit
- Rate sensitivity
- Intermediate duration
- Expense ratio, by class
- 0.60% – 1.69%· COSIX 0.94%
- Portfolio turnover
- 232.00% a year · as of 2025 Q4
Turnover is how much of the portfolio was replaced in a year.
Classified from what the fund holds, not from its name · 2026 Q2. The summary is a paraphrase of the prospectus; the objective is verbatim.
What changed this quarter
Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.
137 new· the largest 3
164 exited· the largest 3
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-05-31
Share of the fund's debt by how its coupon behaves — the fact that decides whether a rate move reaches this portfolio at all.
| Fixed rate | 66.2% |
| Floating rate | 33.6% |
| Zero-coupon or unclassified | 0.2% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 1.0% |
| 1-3y | 8.7% |
| 3-5y | 15.9% |
| 5-10y | 29.0% |
| 10y+ | 45.4% |
These three overlap — one holding can be in arrears and paying in kind at once — so they are shown separately and never summed.
Risk profile
Interest-rate and credit-spread sensitivity, both in years · as of 2026Q2
More of this fund’s sensitivity sits in credit spreads than in interest rates — a rate rally that comes with a credit selloff works against it.
Where the loss would come from. The two shocks are the same size, so this is the balance of the fund's two sensitivities rather than a bet on one moving more.
| Credit spreads | 52% |
| Interest rates | 48% |
Filers report the impact of a 0.01% move only, so the total is our own scaling of that one number and overstates the loss on most bonds — read it as approximate, never as precise. The two sensitivities overlap rather than add up: they measure the same positions against different shocks, which is why the durations above are shown side by side and never summed.
Share of the fund's spread duration carried by each credit tier.
| Investment grade | +2.47 yr |
| High yield | +1.86 yr |
Share of duration at each point, shortest first. A positive figure loses value when spreads widen; a negative one offsets — a credit hedge.
| 3 mo | 0.06 yr | 2% |
| 1 yr | 0.43 yr | 11% |
| 5 yr | 0.94 yr | 24% |
| 10 yr | 1.65 yr | 41% |
| 30 yr | 0.91 yr | 23% |
| 3 mo | 0.66 yr | 15% |
| 1 yr | 0.24 yr | 6% |
| 5 yr | 1.27 yr | 29% |
| 10 yr | 0.78 yr | 18% |
| 30 yr | 1.38 yr | 32% |
The two bands measure the same positions against different shocks and do not add — a Treasury carries rate duration and no spread duration, a floating-rate credit the reverse. Rate tenors are also summed across every currency the fund discloses.
Show the numbers
| Tenor | Rate yrs | IG yrs | HY yrs | IG $/bp | HY $/bp |
|---|---|---|---|---|---|
| 3 mo | +0.06 | +0.82 | -0.16 | $490.6k | -$94.6k |
| 1 yr | +0.43 | +0.02 | +0.22 | $11.9k | $133.5k |
| 5 yr | +0.94 | +0.19 | +1.08 | $113.2k | $645.2k |
| 10 yr | +1.65 | +0.38 | +0.40 | $226.4k | $238.4k |
| 30 yr | +0.91 | +1.06 | +0.31 | $635.4k | $186.8k |
Dollar change per 1bp of spread movement, as filed and sign-anchored. A blank cell was not filed; a zero was.
Duration contribution in years, summing to the fund's 3.99 yr.
This is where the fund's rate exposure sits, not its currency risk — most international bond funds hedge the currency back to dollars, and the size of those hedges is not in the filing. Tenors are also summed across curves, so a 5-year JPY point and a 5-year USD point are added together.
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