Thornburg Investment Income Builder Fund Class R4 (TIBGX) Fund Overview
Educational signal · not a buy or sell recommendation · How to read this
Beta 0.81: the stock has moved about 19% less than the S&P 500.
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 AnswerThornburg Investment Income Builder Fund Class R4 (TIBGX) trades at $37.48. Sector: Financials.
Price as of · Last analyzed: Jun 15, 2026Analyst Coverage for TIBGX: TIBGX does not currently have published analyst price targets in our coverage universe. This is common for smaller-cap names with limited Wall Street coverage.
Thornburg Investment Income Builder Fund Class R4 (TIBGX) Financial Services Profile
Thornburg Investment Income Builder Fund Class R4 (TIBGX) is an asset management fund focused on generating current income surpassing average U.S. stock yields, complemented by long-term capital appreciation. It strategically allocates at least 80% of its assets to income-producing securities and over 50% to common stocks, pursuing a diversified global approach within the financial services sector.
What Is the Investment Thesis for TIBGX?
The investment thesis for Thornburg Investment Income Builder Fund Class R4 (TIBGX) centers on its clearly defined dual objectives: providing current income exceeding average U.S. stock yields and achieving long-term capital appreciation. The fund's robust investment mandate, requiring at least 80% of assets in income-producing securities and over 50% of assets in common stocks, positions it to capture returns from both equity dividends and fixed-income distributions. This diversified allocation across stocks and bonds, coupled with a global investment scope, is a key value driver, aiming to mitigate risk and identify undervalued assets across various sectors and geographies. With a market capitalization of $22.27 billion and a Beta of 0.81, TIBGX demonstrates a relatively lower volatility profile compared to the broader market, which can appeal to income-focused investors seeking stability. A significant growth catalyst lies in the ongoing global demand for income-generating assets, particularly in an environment where traditional savings yields may be insufficient. The fund's ability to consistently deliver an income level surpassing average U.S. stock yields could attract sustained investor inflows, thereby increasing its assets under management. However, as a closed-end fund, TIBGX is subject to market price fluctuations that may deviate from its net asset value (NAV), presenting a potential risk. Investors must monitor this discount or premium to NAV, alongside the fund's performance relative to its benchmark, to assess its true value and operational efficiency. The fund's strategy of identifying undervalued assets provides a potential edge for long-term capital growth, complementing its primary income objective.
Based on FMP financials and quantitative analysis
TIBGX Key Highlights
Market Capitalization: TIBGX commands a significant market capitalization of $22.27 billion, reflecting its substantial presence within the asset management industry.
- Beta: With a Beta of 0.81, the fund exhibits lower volatility compared to the overall market, suggesting a potentially more stable performance profile for investors.
- Investment Mandate - Income-Producing Securities: The fund is mandated to invest at least 80% of its assets in income-producing securities, underscoring its primary objective of generating current income.
- Investment Mandate - Common Stocks: A minimum of 50% of its assets are allocated to common stocks, indicating a strategic balance between income generation and the pursuit of long-term capital appreciation.
- Dividend Policy: TIBGX does not currently pay a dividend, which is a notable characteristic for an income-focused fund, implying its income generation is reinvested or distributed in other forms.
Who Are TIBGX's Competitors?
TIBGX is benchmarked below against 6 industry peers on price, market cap, and our AI MoonshotScore.
| Company | Price | Change | Market Cap | MoonshotScore |
|---|---|---|---|---|
| JARTX Janus Henderson Forty Fund | $56.12 | +1.41% | $25.0B | — |
| JCAPX Janus Henderson Forty Fund Class I | $66.57 | +1.42% | $25.7B | — |
| JFRDX Janus Henderson Forty D | $58.65 | +1.40% | $25.7B | — |
| JACTX Janus Henderson Forty Fund - T Shares | $59.62 | +1.39% | $25.7B | — |
| GAIFX American Funds Growth and Income Portfolio Class F-1 | $22.98 | +0.39% | $23.3B | — |
| EICA Eagle Point Income Company Inc. | $24.99 | -0.04% | $234M | 36 5-pillar |
AI Score by Stock Expert AI · Price data: FMP / Yahoo Finance
What Are TIBGX's Key Strengths?
Clear primary objective of exceeding average U.S. stock yields for current income.
- Robust investment mandate with at least 80% in income-producing securities and 50% in common stocks.
- Globally diversified portfolio strategy aimed at mitigating risk and identifying undervalued assets.
- Significant market capitalization of $22.27 billion, indicating substantial scale.
- Lower volatility profile with a Beta of 0.81 compared to the broader market.
What Are TIBGX's Weaknesses?
As a closed-end fund, its market price can deviate from its Net Asset Value (NAV).
- No explicit dividend yield mentioned, which might be a consideration for pure income investors.
- Reliance on active management introduces potential for human error or underperformance.
- Subject to general market fluctuations affecting both equity and fixed-income components.
What Are the Key Risks for TIBGX?
Market price fluctuations of the closed-end fund, which may trade at a discount or premium to its Net Asset Value (NAV), impacting investor returns.
- Underperformance of the underlying income-producing securities or common stocks, failing to meet the fund's primary income or secondary capital appreciation objectives.
- Sensitivity to interest rate changes, particularly affecting the bond portion of the portfolio, where rising rates could lead to capital depreciation.
- General market downturns or increased volatility across global equity and fixed-income markets, impacting the overall value of the diversified portfolio.
- Credit risk associated with bond holdings, where issuers may default on interest payments or principal, leading to losses for the fund.
What Threats Does TIBGX Face?
- Adverse market conditions, such as rising interest rates, could negatively impact bond valuations.
- Economic downturns or recessions could reduce corporate earnings and dividend payouts.
- Increased competition from other income-focused funds, ETFs, and alternative investment products.
- Risk of underperformance relative to its benchmark or peer group, leading to investor outflows.
What Are TIBGX's Competitive Advantages?
- Defined Investment Mandate: A clear and specific mandate to invest at least 80% in income-producing securities and over 50% in common stocks, differentiating its approach.
- Global Diversification Strategy: The ability to identify undervalued assets across diverse sectors and geographies provides a broader opportunity set and risk mitigation.
- Experienced Active Management: The fund's active management approach aims to generate alpha by strategically selecting securities, potentially outperforming passive income strategies.
- Established Market Presence: A significant market capitalization of $22.27 billion indicates a well-established fund with a track record, fostering investor confidence.
What Does TIBGX Do?
Thornburg Investment Income Builder Fund Class R4 (TIBGX) is an investment vehicle designed to offer investors a dual objective: a primary focus on generating a level of current income that surpasses the average yield on U.S. stocks, and a secondary objective of achieving long-term capital appreciation. Established to navigate diverse market conditions, the fund employs a comprehensive investment strategy by allocating its assets across a broad spectrum of income-producing securities. This includes, but is not limited to, both stocks and bonds, allowing for flexibility in portfolio construction. Under normal operating conditions, TIBGX commits to investing a significant portion of its portfolio, specifically at least 80% of its total assets, in securities that are classified as income-producing. Furthermore, to balance its income generation with growth potential, the fund maintains a substantial allocation of at least 50% of its assets in common stocks. This strategic blend aims to capitalize on both dividend income and potential equity growth. The fund's approach involves identifying undervalued assets across various sectors and geographical regions, contributing to a globally diversified portfolio. This diversification is a core tenet of its strategy, intended to mitigate risks inherent in concentrated investments and capture opportunities wherever they may arise. As a closed-end fund, TIBGX operates with a fixed number of shares outstanding, which trade on an exchange. This structure means its market price can fluctuate independently of its net asset value (NAV), potentially trading at a premium or discount. The fund's evolution reflects a commitment to a balanced investment philosophy, seeking to provide consistent income streams while also participating in the broader market's growth, making it a distinct offering within the asset management industry. Its headquarters are located in Santa Fe, US, anchoring its operations within a well-regulated financial environment.
What Products and Services Does TIBGX Offer?
- Invests in a broad range of income-producing securities, including stocks and bonds.
- Aims to provide current income that exceeds the average yield on U.S. stocks.
- Seeks long-term capital appreciation as a secondary investment objective.
- Allocates at least 80% of its assets to income-producing securities under normal conditions.
- Maintains at least 50% of its assets invested in common stocks.
- Employs a strategy of identifying undervalued assets across various sectors and geographies.
- Manages a globally diversified portfolio to mitigate risk and capture opportunities.
- Operates as a closed-end fund, meaning its shares trade on an exchange and can fluctuate independently of its net asset value (NAV).
How Does TIBGX Make Money?
- Generates returns for investors primarily through income from its diversified portfolio of stocks and bonds.
- Seeks capital appreciation from the growth in value of its underlying common stock holdings.
- Manages investor capital within a structured fund framework, adhering to specific investment mandates.
What Industry Does TIBGX Operate In?
Thornburg Investment Income Builder Fund Class R4 operates within the highly competitive and dynamic Financial Services sector, specifically within the Asset Management - Income industry. This segment is characterized by a diverse array of investment products designed to cater to investors seeking regular income streams, often alongside capital preservation or growth. The broader asset management industry is experiencing trends such as increasing demand for diversified portfolios, a focus on environmental, social, and governance (ESG) factors, and the ongoing shift towards passive and active hybrid strategies. TIBGX positions itself as an actively managed fund with a clear mandate to outperform average U.S. stock yields through a blend of income-producing stocks and bonds. Its strategy of global diversification and identifying undervalued assets places it among funds that aim for alpha generation rather than pure index tracking. The competitive landscape includes a wide range of mutual funds, ETFs, and other managed portfolios, all vying for investor capital by demonstrating superior risk-adjusted returns and consistent income distribution. TIBGX's specific allocation rules (80% income-producing securities, 50% common stocks) define its niche, appealing to investors prioritizing a balanced approach to income and growth within a managed portfolio structure.
Who Are TIBGX's Key Customers?
- Institutional investors seeking a diversified income-generating investment solution.
- Individual investors prioritizing current income streams that surpass average U.S. stock yields.
- Investors looking for long-term capital appreciation as a secondary objective within a managed fund.
- Those seeking exposure to a globally diversified portfolio of income-producing stocks and bonds.
Research confidence
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
MoonshotScore History
Recorded daily since 2026-08-23 · 42 snapshots
| 2026-08-23 | 50 |
| 2026-08-31 | 50 |
| 2026-09-08 | 50 |
| 2026-09-16 | 50 |
| 2026-09-24 | 50 |
| 2026-10-04 | 50 |
| 2026-10-05 | 50 |
What changed?
The score has stayed at 50.
Over the same 30 days the stock moved -3.8%.
TIBGX Financials
Bull Case vs Bear Case
Bull Case
- Clear primary objective of exceeding average U.S. stock yields for current income.
- Robust investment mandate with at least 80% in income-producing securities and 50% in common stocks.
- Globally diversified portfolio strategy aimed at mitigating risk and identifying undervalued assets.
- Significant market capitalization of $22.27 billion, indicating substantial scale.
Bear Case
- As a closed-end fund, its market price can deviate from its Net Asset Value (NAV).
- No explicit dividend yield mentioned, which might be a consideration for pure income investors.
- Reliance on active management introduces potential for human error or underperformance.
- Subject to general market fluctuations affecting both equity and fixed-income components.
AI-generated arguments based on insider flow, news sentiment and technicals — not financial advice · June 2026
TIBGX Latest News
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Why This Top Global Dividend Fund Likes Samsung and Citigroup
Barrons.com · Sep 23, 2026
TIBGX Analyst Consensus
Consensus Rating
Aggregated Buy/Hold/Sell recommendations collected by Financial Modeling Prep for TIBGX.
Price Targets
Wall Street price target analysis for TIBGX.
TIBGX MoonshotScore
MoonshotScore is Stock Expert AI's proprietary 0-100 research rating, not a buy or sell recommendation. No MoonshotScore is published for TIBGX; grades run from A+ (80-100) to F (below 30).
TIBGX Financials Stock FAQ
What are the main risks for TIBGX?
The Thornburg Investment Income Builder Fund Class R4 (TIBGX) faces several key risks. A primary concern for investors in closed-end funds like TIBGX is the potential for its market price to deviate significantly from its Net Asset Value (NAV). This means the fund could trade at a discount or premium, affecting investor returns independently of the underlying portfolio's performance.
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
MoonshotScore is not published for this security.
Data provided for informational purposes only.
- Information is based solely on provided text.
- Growth opportunities for a fund are interpreted as factors that can lead to increased AUM or strong performance, rather than traditional business expansion.