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Thornburg Investment Income Builder Fund Class R3 (TIBRX) Fund Overview

Educational signal · not a buy or sell recommendation · How to read this

$37.21 +$0.20 (+0.54%)

Beta 0.77: the stock has moved about 23% less than the S&P 500.

Data from FMP · Methodology

For informational purposes only. Not financial advice. Machine-generated analysis by Stock Expert AI — model gemini-2.5-flash, generated Jun 15, 2026. Editorial oversight is systemic, not page-by-page. Editorially accountable: Sedat ANAK, Founder and Editor-in-Chief. Data sources: Financial Modeling Prep, Yahoo Finance, SEC EDGAR

Quick Answer

Thornburg Investment Income Builder Fund Class R3 (TIBRX) trades at $37.21. Sector: Financials.

Price as of · Last analyzed: Jun 15, 2026
Thornburg Investment Income Builder Fund Class R3 (TIBRX) is a closed-end fund employing a multi-asset strategy, primarily aiming to generate a substantial level of ongoing income with a yield superior to average U.S. equities. Its secondary objective is long-term capital growth, achieved through diversified investments in income-producing stocks and bonds.

Analyst Coverage for TIBRX: TIBRX does not currently have published analyst price targets in our coverage universe. This is common for smaller-cap names with limited Wall Street coverage.

▶ Watch the TIBRX film Every key number, told as a short cinematic story — just press play. ~2 min

Thornburg Investment Income Builder Fund Class R3 (TIBRX) Financial Services Profile

HeadquartersSanta Fe, US
IPO Year2005

Thornburg Investment Income Builder Fund Class R3 (TIBRX) is a closed-end fund in the Asset Management - Income sector, strategically allocating capital across a diversified portfolio of income-producing stocks and bonds. It targets a substantial ongoing income yield superior to U.S. equities, with long-term capital growth as a secondary objective, maintaining specific asset allocation thresholds.

Data Provenance | Financial Data Quantitative Analysis Analysis: Jun 15, 2026

What Is the Investment Thesis for TIBRX?

AI-written as of Jun 15, 2026 — figures and tone reflect the data available then, not today's score.

Thornburg Investment Income Builder Fund Class R3 (TIBRX) presents an investment profile centered on its multi-asset income generation strategy, targeting a yield superior to average U.S. equities, complemented by a secondary objective of long-term capital growth. With a market capitalization of $22.66 billion, the fund demonstrates significant scale within the asset management industry. Its Beta of 0.77 suggests a historical volatility profile that is lower than the broader market, potentially appealing to investors seeking relative stability. A key value driver is its disciplined asset allocation, committing at least 80% of assets to income-generating instruments and no less than 50% to common stocks, which aims to provide consistent income while participating in equity market upside. However, it is important to note that the fund currently reports no dividend yield, which requires investors to understand how its 'income' objective is realized and distributed. Growth catalysts include sustained demand for income-focused investments, particularly from an aging demographic, and the potential for effective active management to navigate diverse market conditions across equity and fixed-income markets. Key risks involve the inherent market volatility impacting both stock and bond holdings, interest rate fluctuations affecting fixed-income valuations, and the potential for its closed-end fund structure to result in shares trading at a discount or premium to its Net Asset Value (NAV), introducing an additional layer of market risk.

Based on FMP financials and quantitative analysis

TIBRX Key Highlights

AI-written as of Jun 15, 2026 — figures and tone reflect the data available then, not today's score.

Market Capitalization of $22.66 billion, indicating a significant presence within the asset management sector.

  • Beta of 0.77, suggesting lower historical volatility compared to the overall market, which may appeal to risk-averse investors.
  • The fund's primary objective is to generate a substantial level of ongoing income, targeting a yield superior to the average seen in U.S. equities.
  • Under normal circumstances, at least 80% of the fund's assets are dedicated to income-generating instruments, ensuring a strong focus on its primary objective.
  • No less than 50% of the fund's total assets are invested in common stocks, providing exposure to equity market growth potential alongside income generation.

Who Are TIBRX's Competitors?

TIBRX is benchmarked below against 6 industry peers on price, market cap, and our AI MoonshotScore.

Company Price Change Market Cap MoonshotScore
JCAPX Janus Henderson Forty Fund Class I $66.57 +1.42% $25.4B —
JARTX Janus Henderson Forty Fund $56.12 +1.41% $24.6B —
JACTX Janus Henderson Forty Fund - T Shares $59.62 +1.39% $25.3B —
JFRDX Janus Henderson Forty D $58.65 +1.40% $25.4B —
GAIFX American Funds Growth and Income Portfolio Class F-1 $22.89 +0.70% $23.1B —
EICA Eagle Point Income Company Inc. $25.00 +0.12% $234M 36 5-pillar

AI Score by Stock Expert AI · Price data: FMP / Yahoo Finance

What Are TIBRX's Key Strengths?

Clear investment mandate focused on generating substantial ongoing income with a superior yield to U.S. equities.

  • Diversified multi-asset strategy across income-producing stocks and bonds, enhancing portfolio resilience.
  • Specific asset allocation rules (at least 80% in income-generating instruments, no less than 50% in common stocks) provide investment discipline.
  • Lower Beta of 0.77 suggests potentially reduced volatility compared to the broader market, appealing to certain investor profiles.

What Are TIBRX's Weaknesses?

The fund currently reports no dividend yield, which may be a point of confusion for investors seeking direct income distributions from an 'income builder' fund.

  • As a closed-end fund, its market price can trade at a discount or premium to its Net Asset Value (NAV), introducing an additional layer of market risk.
  • Reliance on the performance of underlying equity and fixed-income markets for both income generation and capital growth.
  • Lack of specific information on the fund's fee structure or management team's track record in the provided data.

What Are the Key Risks for TIBRX?

Market volatility affecting both the equity and fixed-income components of the fund's diversified portfolio, potentially leading to fluctuations in asset values.

  • The inherent risk of closed-end funds trading at a discount or premium to their Net Asset Value (NAV), which can impact shareholder returns independently of the underlying portfolio's performance.
  • Adverse changes in interest rates, particularly rising rates, which can negatively impact the market value of the fund's fixed-income securities.
  • Underperformance of selected income-producing securities, failing to meet the fund's objective of a yield superior to average U.S. equities.
  • Increased competition from other asset managers offering similar income-focused or multi-asset strategies, potentially impacting the fund's ability to attract and retain assets.

What Threats Does TIBRX Face?

  • Significant market volatility in either equity or fixed-income markets could negatively impact the fund's performance and asset values.
  • Rising interest rates could adversely affect the value of the fund's fixed-income holdings.
  • Underperformance relative to its stated objectives or peer funds could lead to reduced investor interest and capital outflows.
  • Intense competition from a wide array of other income-focused funds, including open-end funds and ETFs, offering similar or alternative strategies.

What Are TIBRX's Competitive Advantages?

  • Specialized Investment Mandate: A clear and specific objective to generate a substantial level of ongoing income with a yield superior to average U.S. equities, which differentiates it from general equity or bond funds.
  • Diversified Multi-Asset Strategy: The fund's disciplined allocation across both income-producing stocks and bonds provides a broader opportunity set and potential for more stable returns compared to single-asset class funds.
  • Defined Asset Allocation Rules: Strict adherence to investing at least 80% of assets in income-generating instruments and no less than 50% in common stocks provides a consistent framework for its investment approach.
  • Closed-End Fund Structure: While presenting unique risks, this structure can allow for long-term investment in less liquid assets without the pressure of daily redemptions, potentially enabling different investment strategies.

What Does TIBRX Do?

Thornburg Investment Income Builder Fund Class R3 (TIBRX) operates within the Financial Services sector, specifically under Asset Management - Income. The fund's core mission is to deliver a substantial level of ongoing income, with a distinct target of achieving a yield that surpasses the average seen in U.S. equities. While income generation is the primary focus, the fund also holds a significant secondary objective: the pursuit of long-term capital growth. To achieve these dual objectives, TIBRX employs a strategic allocation approach, investing across a varied selection of income-producing securities. Its portfolio predominantly features both stocks and bonds, reflecting a multi-asset strategy designed to capture income and growth opportunities across different market segments. Under normal market conditions, the fund adheres to specific investment guidelines, ensuring that at least 80% of its total assets are invested in income-generating instruments. Furthermore, a substantial portion, no less than 50% of its total assets, is dedicated to common stocks. This allocation strategy underscores its commitment to both stable income streams and exposure to equity market appreciation. As a closed-end fund, TIBRX's shares trade on an exchange, which means its market price can fluctuate based on supply and demand, potentially trading at a premium or discount to its net asset value (NAV). The fund's approach to investment management emphasizes prudent decision-making to balance its income and growth objectives, positioning it as a vehicle for investors seeking a specific blend of current income and potential capital appreciation within a diversified portfolio framework.

What Products and Services Does TIBRX Offer?

  • Manages the Thornburg Investment Income Builder Fund Class R3, a multi-asset investment fund.
  • Primarily aims to generate a substantial level of ongoing income for investors.
  • Targets a yield superior to the average seen in U.S. equities.
  • Pursues long-term growth of capital as a secondary investment objective.
  • Strategically allocates investments across a varied selection of income-producing securities.
  • Invests predominantly in both common stocks and bonds.
  • Maintains at least 80% of its assets in income-generating instruments under normal circumstances.
  • Allocates no less than 50% of its total assets to common stocks.
  • Operates as a closed-end fund, with shares trading on an exchange.

How Does TIBRX Make Money?

  • The fund generates returns for its investors through a combination of income distributions from its holdings and capital appreciation of its underlying assets.
  • As an asset management entity, the fund likely earns management fees, typically calculated as a percentage of assets under management (AUM), which is a standard practice for investment funds.
  • The fund's ability to consistently achieve its income and capital growth objectives helps attract and retain investors, thereby growing its asset base and, consequently, its fee revenue.

What Industry Does TIBRX Operate In?

Thornburg Investment Income Builder Fund Class R3 (TIBRX) operates within the highly competitive Asset Management - Income segment of the Financial Services sector. This industry is characterized by a persistent demand for investment vehicles that can provide consistent income streams, particularly from an aging global population seeking retirement income and institutional investors with specific liability-matching needs. TIBRX positions itself as a multi-asset closed-end fund, differentiating through its explicit target of a yield superior to average U.S. equities and its specific allocation rules, including at least 80% in income-generating instruments and no less than 50% in common stocks. The competitive landscape includes a broad array of mutual funds, exchange-traded funds (ETFs), and other closed-end funds offering income-focused or balanced strategies. Competitors such as Janus Henderson Forty Fund Class I (JCAPX), Janus Henderson Forty Fund (JARTX), Janus Henderson Forty Fund - T Shares (JACTX), Janus Henderson Forty D (JFRDX), and American Funds Growth and Income Portfolio Class F-1 (GAIFX) also vie for investor capital, often with similar but distinct mandates regarding asset allocation, risk profiles, and income distribution strategies. TIBRX's closed-end structure introduces unique market dynamics, as its shares trade on an exchange, potentially at a premium or discount to its underlying Net Asset Value (NAV), a factor not typically present in open-end funds.

Who Are TIBRX's Key Customers?

  • Institutional investors seeking diversified income-generating solutions.
  • Individual investors prioritizing a high level of current income.
  • Investors looking for a yield superior to the average U.S. equity market.
  • Clients seeking long-term capital growth potential alongside income.
  • Investors interested in a multi-asset strategy with exposure to both stocks and bonds.
Model self-rating on this text: 71% (not a measure of the evidence) Updated: Jun 15, 2026

Research confidence

Low

Thin evidence — scoring coverage unknown. Treat this as a starting point, not a conclusion.

  • ● Scoring coverage unknown
  • ● Price is current
  • ● No filing on record
  • ● No analyst coverage
  • ● This is a fund, not an operating company

TIBRX Financials

Bull Case vs Bear Case

Bull Case

  • Clear investment mandate focused on generating substantial ongoing income with a superior yield to U.S. equities.
  • Diversified multi-asset strategy across income-producing stocks and bonds, enhancing portfolio resilience.
  • Specific asset allocation rules (at least 80% in income-generating instruments, no less than 50% in common stocks) provide investment discipline.
  • Lower Beta of 0.77 suggests potentially reduced volatility compared to the broader market, appealing to certain investor profiles.

Bear Case

  • The fund currently reports no dividend yield, which may be a point of confusion for investors seeking direct income distributions from an 'income builder' fund.
  • As a closed-end fund, its market price can trade at a discount or premium to its Net Asset Value (NAV), introducing an additional layer of market risk.
  • Reliance on the performance of underlying equity and fixed-income markets for both income generation and capital growth.
  • Lack of specific information on the fund's fee structure or management team's track record in the provided data.

AI-generated arguments based on insider flow, news sentiment and technicals — not financial advice · June 2026

TIBRX Latest News

TIBRX Analyst Consensus

Consensus Rating

Aggregated Buy/Hold/Sell recommendations collected by Financial Modeling Prep for TIBRX.

Price Targets

Wall Street price target analysis for TIBRX.

TIBRX MoonshotScore

MoonshotScore is Stock Expert AI's proprietary 0-100 research rating, not a buy or sell recommendation. No MoonshotScore is published for TIBRX; grades run from A+ (80-100) to F (below 30).

Thornburg Investment Income Builder Fund Class R3 Financials Stock: Key Questions Answered

What are the unique characteristics and risks of Thornburg Investment Income Builder Fund Class R3 as a closed-end fund?

As a closed-end fund, Thornburg Investment Income Builder Fund Class R3 (TIBRX) possesses unique characteristics and risks distinct from open-end mutual funds. Unlike open-end funds, which continuously issue and redeem shares at Net Asset Value (NAV), TIBRX has a fixed number of shares that trade on an exchange.

Disclaimer: This content is for informational purposes only and does not constitute investment advice. Always do your own research and consult a financial advisor.

Official Resources

Price as of Analysis updated

MoonshotScore is not published for this security.

Data Sources & Methodology
Figures come from Financial Modeling Prep (FMP). If FMP has no figure for a ticker, a price or fundamental may come from a Yahoo Finance fallback, or a price from an Alpaca fallback. SEC EDGAR is used only for filing links and company identity details (legal name, address), never for figures. AI analysis by Stock Expert AI proprietary algorithms. Technical indicators via industry-standard calculations. Last updated: .
Data Provenance
Sources: Financial Modeling Prep (FMP) — Primary · Yahoo Finance — Fallback · Alpaca — Tertiary
Last fetched:
Cache TTL: Quote 5min · Profile 7d · Financials 7d · Insider 48h
How we use AI: Numbers are pulled directly from FMP & Yahoo Finance — our AI writes the analysis, it never edits the figures.
Data provided as-is for educational purposes. Not financial advice. Methodology

Data provided for informational purposes only.

Analysis Notes
  • Information on founding story, specific management team, and detailed fee structure is not available in the provided source data.
  • Growth opportunities and risks are based on general industry trends and the fund's stated strategy, elaborated without introducing new facts.
  • The interpretation of 'no dividend' for an 'income builder' fund is based on the direct statement in the source and general fund operations.
Data Sources
Financial Modeling Prep (FMP)Stock Expert AI proprietary analysis