Nuveen Core Impact Bond Fund
Actively managed U.S. bond fund
As of its 2026 Q2 report, Nuveen Core Impact Bond Fund held 1,118 positions with $8.09B in net assets. Its ten largest holdings made up 23.9% of the fund. The TSBIX share class costs 0.35% a year. Over the 12 months to May 2026, TSBIX returned 5.7%, with dividends reinvested. In 2026 Q2 it added 92 new positions and exited 75.
The Fund seeks total return, primarily through current income, while giving special consideration to certain environmental, social and governance (ESG) criteria.
The fund invests at least 80% of its assets in investment-grade and high-yield bonds selected through active management and screened against environmental, social and governance criteria; approximately 40% of the portfolio targets impact investments in areas such as affordable housing, renewable energy and community development. The fund's adviser performs its own credit analysis rather than relying exclusively on ratings, and may overweight or underweight sectors relative to its Bloomberg U.S. Aggregate Bond Index benchmark. The fund will not generally invest in companies significantly involved in alcohol, tobacco, military weapons, firearms, nuclear power, thermal coal or gambling. Because ESG evaluation is qualitative and subjective, there is no assurance that every fund investment will meet ESG criteria or do so at all times.
What you own
| Company | Weight | Value | Shares |
|---|---|---|---|
United States Treasury Note/Bond 5.00% · due 2046-05-15 | 4.22% | $341.33M | — |
United States Treasury Note/Bond 4.38% · due 2036-05-15 | 4.05% | $327.58M | — |
United States Treasury Note/Bond 4.13% · due 2031-06-30 | 3.78% | $306.05M | — |
United States Treasury Note/Bond 4.13% · due 2028-06-30 | 3.47% | $280.42M | — |
United States Treasury Note/Bond 4.75% · due 2056-02-15 | 2.44% | $197.08M | — |
STATE STREET BANK AND TRUST COMPANY | 1.58% | $127.94M | — |
Fannie Mae 4.50% · due 2052-09-01 | 1.48% | $119.59M | — |
Fannie Mae Pool 5.50% · due 2053-10-01 | 1.06% | $85.65M | — |
US TREASURY N/B 2.38% · due 2042-02-15 | 1.04% | $83.80M | — |
Fannie Mae Pool 5.50% · due 2054-04-01 | 0.75% | $60.77M | — |
The 200 largest of 1,118 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%.
| Bonds | 65.52% |
| Securitized | 31.71% |
| Cash & short-term | 1.77% |
| Loans | 0.36% |
| 2 smaller | 0.32% |
Derivatives are shown at market value, not notional exposure.
By sector
- Government
- 36.1%
- Securitized
- 31.8%
- Other
- 11.0%
- International
- 9.4%
- 11 other sectors
- 11.7%
- Government
- 36.1%
- Securitized
- 31.8%
- Other
- 11.0%
- International
- 9.4%
- Utilities
- 4.7%
- Financials
- 3.6%
- Consumer Staples
- 1.2%
- Energy
- 0.6%
- Industrials
- 0.5%
- Materials
- 0.3%
- Communication Services
- 0.2%
- Health Care
- 0.2%
- Cash
- 0.2%
- Information Technology
- 0.2%
- Consumer Discretionary
- 0.0%
How it has done
TSBIX share class · total returns with dividends reinvested
Volatility over the last 12 months: 3.22%. Past returns are a record, not a forecast.
Jun 2026 has been filed since the trailing figures were struck, so it is not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
The 5 share classes hold the same portfolio
| Share class | Expense ratio | 1 year | 3 years | 5 years | Worst fall |
|---|---|---|---|---|---|
| 0.35% | +5.69% | +14.40% | +1.90% | -4.90% | |
| 0.51% | +5.41% | +13.70% | +0.92% | -4.97% | |
| 0.67% | +5.21% | +13.22% | +0.30% | -5.01% | |
| 0.60% | +5.31% | +13.42% | +0.52% | -5.00% | |
| 0.41% | +5.52% | +14.05% | +1.46% | -4.93% |
These classes hold the same portfolio, so the 1.59pp spread over 5 years is the cost difference between them — roughly 0.32pp a year — not a difference in what they own.
Fees & fund details
Nuveen Core Impact Bond 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
- Investment grade
- Rate sensitivity
- Intermediate duration
- Expense ratio, by class
- 0.35% – 0.67%· TSBIX 0.35%
- Portfolio turnover
- 147.00% a year · as of 2025 Q3
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.
92 new· the largest 3
75 exited· the largest 1
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-06-30
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 | 90.2% |
| Floating rate | 9.8% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 2.7% |
| 1-3y | 12.6% |
| 3-5y | 13.4% |
| 5-10y | 18.6% |
| 10y+ | 51.6% |
| Unknown | 1.1% |
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 | 50% |
| Interest rates | 50% |
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 | +5.52 yr |
| High yield | +0.26 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 | 0.01 yr | 0% |
| 1 yr | 0.24 yr | 4% |
| 5 yr | 0.90 yr | 16% |
| 10 yr | 1.90 yr | 33% |
| 30 yr | 2.66 yr | 47% |
| 3 mo | 0.01 yr | 0% |
| 1 yr | 0.26 yr | 4% |
| 5 yr | 0.93 yr | 16% |
| 10 yr | 1.95 yr | 34% |
| 30 yr | 2.63 yr | 45% |
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 | +0.01 | +0.01 | +0.00 | $6.1k | $2.4k |
| 1 yr | +0.24 | +0.23 | +0.03 | $189.5k | $20.8k |
| 5 yr | +0.90 | +0.85 | +0.08 | $688.6k | $64.3k |
| 10 yr | +1.90 | +1.89 | +0.07 | $1.53m | $53.8k |
| 30 yr | +2.66 | +2.54 | +0.09 | $2.05m | $71.9k |
Dollar change per 1bp of spread movement, as filed and sign-anchored. A blank cell was not filed; a zero was.
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