In plain terms — Nuveen Select Tax Free Income Portfolio
Shares currently cost about 2.0% less than the value of the assets behind them (a discount).
Over the past year it has averaged a 0.2% discount, so today's level is unusually wide for this fund (Z-score -2.2). That describes the past; it does not predict where the discount goes next.
It pays regular distributions worth about 4.9% a year of the share price (4.8% of the assets). That is a payout rate, not a return: part of it may be capital being handed back.
Because the shares trade below the value of their assets, each dollar of reinvested distributions buys about $1.02 of assets — a ReinvestCapture™ rate of 5.0%, more than the payout rate itself. That is buying power, not a return.
The assets themselves fell 2.2% over the past year including distributions (NAV total return).
Annual costs are 0.35% of assets.
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Price and NAV, past year
Snapshot
Valuation vs. history
| Window | Average prem/disc | Std. dev. | Z-score | Observations |
|---|---|---|---|---|
| 3 months | -0.12% | 1.38% | -1.75 | 62 |
| 6 months | -0.25% | 1.08% | -2.11 | 118 |
| 1 year | -0.25% | 1.04% | -2.19 | 224 |
| 3 years | +0.06% | — | — | — |
| 5 years | -1.02% | — | — | — |
Current contemporaneous premium/discount -2.53% (close Oct 14, 2026 vs NAV Oct 13, 2026). 1-year range -4.15% to +1.56%. A negative Z-score means a wider discount than the window average — not that the fund is undervalued.
Performance
| Series | 1M | 3M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) |
|---|---|---|---|---|---|---|
| Market price return | -4.83% | -10.16% | -7.80% | -10.59% | -1.22% | -5.48% |
| Market price total return | -4.45% | -9.13% | -4.63% | -6.49% | +3.01% | -1.53% |
| NAV return | -2.46% | -6.20% | -6.14% | -6.53% | -0.85% | -3.75% |
| NAV total return | -2.08% | -5.13% | -2.91% | -2.23% | +3.41% | +0.24% |
Through Oct 14, 2026. Total return reinvests distributions at the series value on the ex-date. Cumulative ≤ 1 year, annualised beyond.
About the fund
Established on March 19, 1992, the Nuveen Select Tax-Free Income Portfolio functions as a closed-ended mutual fund dedicated to fixed income investments within the United States. Jointly overseen by Nuveen Fund Advisors LLC and Nuveen Asset Management, LLC (under the Nuveen Investments Inc. umbrella), the fund strategically allocates its capital primarily to investment-grade municipal securities, targeting those rated Baa, BBB, or higher. Its financial performance is benchmarked against both the Standard & Poor's (S&P) National Municipal Bond Index and the Lipper General and Insured Unleveraged Municipal Debt Funds Average. This portfolio remains domiciled in the U.S.
CEF Explorer research page for Nuveen Select Tax Free Income Portfolio. Figures carry their own dates and sources; a discount to NAV does not guarantee convergence or any return. This is not investment advice.