NMBAX Performance — Nuveen Intermediate Duration Municipal Bond Fund, Class A
Data updated: 2026-08-27
NMBAX returned +1.49% year to date and +5.52% over one year to Jun 2026. Annualised returns are +3.69% over 3 years and +0.98% over 5 years. Against its Intermediate Municipal Bond category average the fund came out ahead over three years but behind over one: $100 invested three years ago grew to $111, against $111 for the category, and to $106 over one year, against $106. Volatility over the past three years was 4.58% a year. In the 12 months to Jun 2026 the fund took in a net $1.6B, and assets reached $9.59B.
NMBAX Growth of $100
What $100 invested in Nuveen Intermediate Duration Municipal Bond Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Intermediate Municipal Bond category average over the same months.
| Period | NMBAX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $106 | $106 |
| 3 years (Jul 2023 – Jun 2026) | $111 | $111 |
| 5 years (Jul 2021 – Jun 2026) | $105 | $105 |
| Since data start (Jul 2019 – Jun 2026) | $113 | $112 |
NMBAX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.49% |
| 1 year | +5.52% |
| 3 years (annualised) | +3.69% |
| 5 years (annualised) | +0.98% |
NMBAX Annual Returns
Calendar-year total returns of Nuveen Intermediate Duration Municipal Bond Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +1.49% |
| 2025 | +4.74% |
| 2024 | +1.71% |
| 2023 | +5.51% |
| 2022 | −8.31% |
| 2021 | +1.77% |
| 2020 | +4.26% |
| 2019 (Jul–Dec) | +1.95% |
NMBAX Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.8% | +1.2% | −2.3% | +1.0% | +0.4% | +0.5% | — | — | — | — | — | — |
| 2025 | +0.7% | +1.3% | −1.7% | −0.4% | 0.0% | +0.8% | −0.2% | +0.9% | +1.9% | +1.0% | +0.3% | +0.2% |
| 2024 | −0.1% | +0.4% | +0.1% | −0.9% | +0.1% | +1.6% | +0.7% | +0.8% | +0.1% | −1.2% | +1.4% | −1.3% |
| 2023 | +2.5% | −1.9% | +1.6% | 0.0% | −0.7% | +0.9% | +0.2% | −0.9% | −2.1% | −1.1% | +4.8% | +2.3% |
| 2022 | −2.4% | −0.5% | −2.6% | −2.4% | +1.1% | −1.8% | +2.6% | −1.8% | −3.7% | −0.5% | +3.7% | +0.1% |
| 2021 | +0.7% | −1.4% | +0.5% | +0.7% | +0.4% | +0.5% | +0.6% | −0.2% | −0.7% | −0.1% | +0.8% | −0.1% |
| 2020 | +1.8% | +1.1% | −4.4% | −1.3% | +3.0% | +1.4% | +0.9% | −0.2% | 0.0% | −0.2% | +1.4% | +1.0% |
| 2019 | — | — | — | — | — | — | +0.6% | +1.4% | −0.7% | +0.2% | +0.1% | +0.3% |
NMBAX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 4.58%
- 3-year Sharpe ratio: -0.18 (vs 4.5% risk-free rate)
- Best month: +4.82% (Nov 2023)
- Worst month: −2.28% (Mar 2026)
NMBAX Fund Flows
Monthly money in and out of Nuveen Intermediate Duration Municipal Bond Fund, from SEC Form N-PORT.
- 12-month net flow: $1.6B
- 12-month gross sales (incl. reinvestments): $3.4B
- Sales ÷ redemptions: 1.85×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $231.3M | $136.9M | $94.4M |
| May 2026 | $789.2M | $158.0M | $631.2M |
| Apr 2026 | $168.4M | $143.8M | $24.6M |
| Mar 2026 | $325.3M | $186.5M | $138.8M |
| Feb 2026 | $237.0M | $119.1M | $117.8M |
| Jan 2026 | $237.8M | $170.4M | $67.4M |
| Dec 2025 | $251.8M | $162.0M | $89.8M |
| Nov 2025 | $177.9M | $109.5M | $68.3M |
| Oct 2025 | $240.8M | $157.6M | $83.2M |
| Sep 2025 | $214.8M | $148.6M | $66.1M |
| Aug 2025 | $228.2M | $159.5M | $68.7M |
| Jul 2025 | $284.9M | $183.6M | $101.3M |
NMBAX Assets Under Management
Net assets of Nuveen Intermediate Duration Municipal Bond Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $9.59B |
| 2026-03-31 | $8.75B |
| 2025-12-31 | $8.52B |
| 2025-09-30 | $8.24B |
| 2025-06-30 | $7.87B |
| 2025-03-31 | $7.66B |
| 2024-12-31 | $7.65B |
| 2024-09-30 | $7.76B |
| 2024-06-30 | $7.49B |
| 2024-03-31 | $7.41B |
| 2023-12-31 | $7.45B |
| 2023-09-30 | $7.32B |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.