What Changed
Price Move History
- Daily moves over 5%
- 2 252 sessions, March 27, 2025 to March 27, 2026
- Largest daily move
- +9.2% close of April 9, 2025
- 1-year change
- +0.5% closing prices, March 27, 2025 to March 27, 2026
- 1-month change
- -9.3% closing prices, February 27, 2026 to March 27, 2026
Company Description
Nuveen S&P 500 Buy-Write Income Fund (NYSE: BXMX) is a diversified closed-end management investment company based in the United States. According to available information, the fund’s stated investment objective is to seek attractive total returns with less volatility compared with a fully invested equity portfolio.
The fund invests its managed assets in a diversified equity portfolio that seeks to substantially replicate the price movements of the S&P 500 Index. In addition to equity holdings, the fund employs an options-based strategy by writing (selling) index call options. This buy-write approach is used in seeking to moderate the volatility of returns relative to an all-equity portfolio. The fund’s revenue is generated mainly from interest and dividend income associated with its investments.
BXMX is part of the Nuveen family of closed-end funds. Nuveen is described as a sponsor of closed-end funds with experience managing vehicles designed for income-focused investors seeking regular distributions. Within this platform, BXMX offers exposure to an equity strategy linked to the S&P 500 Index combined with an options overlay.
Investment approach
The fund’s equity portfolio is constructed to substantially track the price behavior of the S&P 500 Index. By writing index call options, the fund seeks to generate additional income and reduce the impact of market fluctuations on the overall portfolio. This structure is intended to provide investors with equity market participation while aiming for a smoother return profile than a portfolio invested solely in stocks.
Because it is organized as a closed-end management investment company, BXMX’s shares trade on the New York Stock Exchange and may trade at a premium or discount to the fund’s net asset value. The focus on interest and dividend income, combined with option-writing premiums, aligns the fund with investors who prioritize income as part of their total return.
Relationship to Nuveen’s closed-end fund platform
BXMX is one of several Nuveen closed-end funds that use covered call or overwrite strategies. Information provided by Nuveen notes that its closed-end funds offer exposure to a range of asset classes and are designed for income-focused investors seeking regular distributions. BXMX’s S&P 500 buy-write mandate fits within this broader platform of income-oriented strategies.
Proposed merger involving BXMX
According to a public announcement, the Board of Trustees of Nuveen S&P 500 Buy-Write Income Fund has approved a proposal to merge the fund with other Nuveen closed-end funds. The proposal would combine BXMX and Nuveen Dow 30℠ Dynamic Overwrite Fund (NYSE: DIAX) into Nuveen S&P 500 Dynamic Overwrite Fund (NYSE: SPXX), subject to certain conditions.
The stated purpose of the proposed mergers is to create a larger fund with lower net operating expenses and increased trading volume on the exchange for common shares. The mergers are contingent on necessary approvals by shareholders of the respective funds and other conditions described in proxy materials expected to be filed in connection with the proposal. Until such mergers are completed, BXMX continues to be described as a separate closed-end management investment company.
Governance and shareholder considerations
The announcement regarding the proposed mergers indicates that BXMX will hold an Annual Meeting of Shareholders to consider approval of the merger proposal and to elect Board Members. Shareholder proposals related to this meeting are subject to timing and procedural requirements under the Securities Exchange Act of 1934 and the fund’s bylaws, as described in the public communication. Detailed information about the merger proposal and Board candidates is expected to be contained in proxy materials to be filed with the U.S. Securities and Exchange Commission.
Investors are encouraged in that communication to review the solicitation materials and any related documents when they become available, as they will contain important information about the merger proposal and the funds involved.
Risk considerations
The information provided in the public release emphasizes that past performance is no guarantee of future results and that all investments carry a degree of risk, including possible loss of principal. It also notes that closed-end funds frequently trade at a discount from net asset value, and that shares may be worth more or less than the purchase price or net asset value at any point in time, even when distributions are reinvested.
In addition, the communication highlights that there is no guarantee that investment objectives will be achieved and that it is important for investors to consider the objectives, risks, charges, and expenses of any fund before investing. These statements apply to Nuveen closed-end funds generally, including BXMX.
Position within the investment landscape
Within the broader Nuveen platform, BXMX represents an S&P 500-focused buy-write income strategy implemented through a closed-end fund structure. Its combination of equity exposure that seeks to substantially replicate the S&P 500 Index and an options-writing overlay is intended to appeal to investors who seek equity-linked total return with an emphasis on income and moderated volatility, as described in the available materials.
Stock Performance
NUVEEN S&P BUY-WRITE INCOME FUND (BXMX) closed at $13.26 on March 27, 2026. Over the past 12 months, the price has gained 0.5%.
BXMX Metrics & Rankings
Price returns through March 27, 2026. Month-to-date and YTD include the first trading day. Ranking links may use different dates.
Latest News
NUVEEN S&P BUY-WRITE INCOME FUND has 3 recent news articles. Of the recent coverage, 1 article coincided with positive price movement and 1 with negative movement. Key topics include acquisition. View all BXMX news →
SEC Filings
NUVEEN S&P BUY-WRITE INCOME FUND has filed 8 recent SEC filings, including 2 Form 3, 2 Form 425, 1 Form SCHEDULE 13G/A, 1 Form 25-NSE. The most recent filing was submitted on April 8, 2026. SEC filings provide transparency into a company's financial condition, material events, and regulatory compliance. View all BXMX SEC filings →
Short Interest History
Short interest in NUVEEN S&P BUY-WRITE INCOME FUND (BXMX) currently stands at 38.8 thousand shares, up 81.9% from the previous reporting period, representing 0.0% of the shares outstanding. Since October 2025, short interest has increased by 103.6%.
Days to Cover History
Days to cover for NUVEEN S&P BUY-WRITE INCOME FUND (BXMX) currently stands at 1.0 days. The ratio is the reported short interest divided by the average daily trading volume.
BXMX Company Profile & Sector Positioning
NUVEEN S&P BUY-WRITE INCOME FUND (BXMX) operates in the Asset Management industry within the broader Financial Services sector and is listed on the NYSE.