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How Mutual Funds Work

6 min read•Updated on 21st Oct, 2026•by Team Angel One
Mutual funds offer investors access to professionally managed portfolios across asset classes, with returns and risks varying according to the scheme’s investment strategy.
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Mutual funds pool money from multiple investors to build a managed portfolio of securities, such as shares, bonds, government securities, and money market instruments. Their returns, expenses, and risk levels vary depending on the scheme’s investment objectives and underlying assets.

This article explains how mutual funds work in detail.

Key Takeaways

  • Mutual funds allow individual investors to pool capital to gain exposure to professionally managed portfolios and broad asset diversification, though neither guarantees positive investment returns.
  • Regulatory standards set by SEBI establish standard asset allocation guidelines across equity, debt, hybrid, and other structures to enhance portfolio clarity and consistency.
  • Systematic Investment Plans (SIPs) foster consistency and lower the impact of purchase timing through rupee-cost averaging, although market fluctuations and investor emotion can still affect outcomes.
  • Selecting direct plans over regular options eliminates distributor commission costs from scheme expenses, supporting improved long-term compounding.
  • Capital gains taxation relies on explicit transaction dates, asset-class thresholds, and holding periods.

What is a Mutual Fund?

A mutual fund is a professionally managed financial vehicle that pools money from multiple investors to purchase a diversified portfolio of securities, such as stocks, bonds, and money market instruments. When you invest, you buy units of the fund, representing a proportional share of the overall portfolio's assets.

Features of Mutual Funds

  • Professional management: Portfolios are routinely analyzed, monitored, and adjusted by qualified fund managers and research teams. However, professional oversight does not ensure profits or prevent capital losses.
  • Diversification: Spreading funds across multiple securities helps reduce exposure to individual company risks. However, diversification does not eliminate general market risk, sector slowdowns, interest rate shifts, credit defaults, liquidity squeezes, or currency fluctuations.
  • Liquidity: Most open-ended funds permit redemptions on business days at the applicable NAV. However, redemptions are subject to factors such as exit loads, cut-off timings, transaction processing timelines, mandatory lock-ins (such as ELSS), and occasional temporary restrictions during extreme operational or market events. Exchange-Traded Funds (ETFs) trade via exchanges and typically require a demat account. 
  • Cost efficiency: Pooling capital allows investors to share operational expenses and transaction fees, making portfolio access more cost-effective than building an equivalent basket of individual securities independently.

How Does a Mutual Fund Work?

1. Capital Pooling: Creating Scale and Diversification

The foundation of any mutual fund structure rests on capital pooling, where thousands of retail and institutional investors contribute varying amounts of capital into a single, combined reservoir managed by an Asset Management Company (AMC).

  • Public Trust & Fiduciary Safety: Capital is not held directly by the corporate AMC. Mutual funds are legally structured as Public Trusts. The AMC acts as the operational manager, while an independent Board of Trustees holds fiduciary responsibility to safeguard investor interests and enforce regulatory compliance (e.g., SEBI rules).
  • Unit Allotment: In exchange for contributed capital, investors receive units representing their proportional stake in the fund's net assets.
  • Democratized Diversification: A single retail investor with ₹500 ($50) cannot individually build a balanced portfolio containing 50 blue-chip equities, corporate bonds, and government debt. Through capital pooling, every unit holder acquires instantaneous, proportional exposure to the fund's entire asset basket.

2. Professional Deployment: Mandate-Driven Management

Once capital is aggregated, qualified Fund Managers and team research analysts actively or passively allocate the fund's resources across target financial instruments.

  • Mandate Adherence: Every mutual fund operates under a regulatory Scheme Information Document (SID) and Key Information Memorandum (KIM). Whether the mandate mandates large-cap equity growth, short-duration debt, or sectoral strategy, the fund manager is legally required to deploy funds within these predefined parameters.
  • Institutional Execution: Fund managers perform continuous top-down macro analysis, bottom-up fundamental stock selection, and quantitative risk checks to optimize risk-adjusted returns relative to the fund's designated benchmark index.

3. Daily Net Asset Value (NAV) Calculation & Pricing Dynamics

Because underlying market prices fluctuate throughout the trading day, the fund calculates its official Net Asset Value (NAV) at the close of every business day.

Mathematical Calculation of NAV

The per-unit NAV reflects the net market value of one unit of the scheme after accounting for accrued operational expenses:

NAV = (Total Market Value of Portfolio Assets − Total Liabilities and Accrued Expenses) ÷ Total Outstanding Fund Units

  • Expense Ratio Deductions: Operational costs, including management fees, custodian charges, registrar fees, and audit expenses, are capped by regulatory limits and accrued daily directly into the NAV calculation.
  • Subscription and Redemption: In standard open-ended mutual funds, transactions (buying or selling units) occur directly with the AMC at the official end-of-day NAV (subject to applicable exit loads or cut-off timing rules).

Key Distinction: Open-Ended Mutual Funds vs Exchange-Traded Funds

While standard mutual funds and Exchange-Traded Funds (ETFs) both rely on capital pooling, their pricing models and trading venues differ fundamentally:

Feature 

Open-Ended Mutual Funds 

Exchange-Traded Funds (ETFs) 

Transaction Venue 

Directly through AMC / Investment Platforms 

Secondary Stock Exchanges via Brokerage Accounts 

Execution Price 

Single daily NAV published after market close 

Continuous Intraday Market Price during trading hours 

Pricing Driver 

Exact net valuation of underlying assets 

Real-time market supply and demand on exchange order books 

Trading Multiples 

None. Always transacts at true NAV 

Present. Can trade at a premium or discount to intraday NAV (iNAV) 

What You Need to Know Before Investing in Mutual Funds 

  • Risk appetite vs Return goals: Higher growth targets inherently demand a higher tolerance for short-term market fluctuations and volatility. 

  • Investment horizon: Equity funds are generally better suited for long-term objectives, frequently five years or more, allowing portfolios sufficient time to navigate market contractions. The exact required time horizon varies based on the specific fund sub-category, financial goals, and individual risk capacity. 

  • Matching debt products to timelines: Fixed-income schemes are not uniform. Short-duration, overnight, or liquid funds can be considered for short-term liquidity needs, whereas long-duration or credit-risk strategies typically require extended holding periods.

  • Direct vs. Regular plans: Choosing direct plans removes distributor commission charges from the fund's expense ratio, which lowers overall costs and improves long-term compounding relative to regular plans. 

Types of Mutual Funds 

Fund Category 

Objective 

Primary Asset Class 

Risk Level 

Minimum Equity/Asset Rules & Sub-Categories 

Equity-Oriented Schemes 

Long-term capital growth 

Equity & equity-related instruments 

Varies by category & market cap mandate 

• Large/Mid/Small Cap: Min. 80% equity 

 

• Multi-Cap: Min. 75% equity (25% each in Large, Mid, Small) 

 

• Flexi-Cap / ELSS / Value: Min. 65% equity 

Debt-Oriented Schemes 

Income generation & capital protection 

Fixed-income & money market instruments 

Exposed to credit, duration & liquidity risks 

• Liquid, Overnight, Corporate Bond, Gilt, Credit Risk 

Hybrid Schemes 

Balanced growth, income & risk mitigation 

Combination of equity & fixed income 

Varies by asset mix 

• Aggressive Hybrid: 65%–75% equity 

 

• Conservative Hybrid: 10%–25% equity 

 

• Dynamic / Balanced Advantage: Asset allocation managed dynamically 

Solution-Oriented Schemes 

Long-term milestone goal planning 

Defined asset mix based on scheme target 

Moderate to High 

• Retirement & Children’s Funds (Mandatory lock-in period of 5 years or until adulthood) 

Passive & Other Schemes 

Index tracking, target exposure, or multi-asset allocation 

Underlying indices, target funds, or physical assets 

Depends on underlying assets/index 

• Index Funds, ETFs, Fund of Funds (FoFs) 

  1. Equity-Oriented Schemes: Invest predominantly in equity and equity-related instruments, with specific minimum allocation thresholds mandated by SEBI based on the fund sub-category: 

  • Large-Cap, Mid-Cap, and Small-Cap Funds: SEBI mandates a minimum 80% allocation to equity and equity-related instruments of their respective market-cap universes. 

  • Multi-Cap Funds: SEBI mandates a minimum 75% total allocation in equity, with a compulsory minimum allocation of 25% each in large-cap, mid-cap, and small-cap stocks. 

  • Flexi-Cap, ELSS, Value/Contra, and Dividend Yield Funds: Require a minimum 65% allocation to equities. 

  1. Debt-oriented schemes: Invest primarily in fixed-income and money market instruments. They aim to deliver income and lower volatility than equities, but capital and returns remain exposed to credit, interest rate, liquidity, and broader market risks. 

  1. Hybrid schemes: Allocate capital between equity and fixed-income assets in varying proportions to balance potential growth, capital stability, and risk based on the fund's specific category mandate. 

  1. Solution-oriented schemes: Formulated around long-term financial milestones like retirement or higher education, often carrying mandatory lock-in periods. 

  1. Passive & Other Schemes: Include index strategies, Exchange-Traded Funds (ETFs), and Fund of Funds (FoFs). FoFs can be actively or passively managed and may invest in domestic or overseas funds rather than tracking an index. ETFs trade on exchanges and vary by operational structure. 

Advantages of Investing in Mutual Funds 

  • Offers hassle-free portfolio diversification without requiring massive capital. 

  • Provides visibility through required disclosures covering total expense ratios, portfolio compositions, exit charges, and performance track records. 

Disadvantages of Mutual Funds 

  • Subject to market risks; poor market performance or wrong fund selection can lead to capital losses. 

  • Fund management fees (expense ratios) impact net profitability over time. 

  • Portfolio decisions are handled by fund managers, meaning individual investors cannot choose or exclude specific stocks in the portfolio. 

  • Passive instruments (index funds and ETFs) may experience tracking errors and lag their target indices due to fund expense ratios, cash balances, and execution costs. 

Tax Implications of Mutual Funds  

1. Equity-Oriented Schemes (greater than 65% Domestic Equity) 

  • STCG (Holding less than 12 months): Taxed at 20% (plus applicable surcharge and 4% Health & Education Cess). 

  • LTCG (Holding more than 12 months): Taxed at 12.5% on gains exceeding ₹1.25 lakh in a financial year (without indexation benefit). 

2. Specified Debt Mutual Funds (less than 35% Equity Exposure) 

  • Acquisitions on or after April 1, 2023 (Section 50AA): All gains are legally treated as short-term capital gains and taxed according to the investor's marginal income tax slab rate, irrespective of how long the units are held. 

  • Grandfathered Holdings (Acquired before April 1, 2023): Benefit from LTCG status if held for over 36 months, taxed at 12.5% without indexation (under post-July 2024 tax rules). 

3. Other Non-Equity / Hybrid Funds (Equity Exposure > 35% to < 65%) 

  • Examples include Conservative Hybrid Funds, Multi-Asset Allocation Funds (with lower equity exposure), and Fund of Funds (FoFs). 

  • Short-Term (less than 24 months): Taxed at applicable slab rates. 

  • Long-Term (more than 24 months): Taxed at 12.5% without indexation (under the rationalized capital gains regime effective July 23, 2024). 

SEBI Guidelines and Regulations on Mutual Funds 

The Securities and Exchange Board of India (SEBI) regulates mutual fund operations to safeguard investor interests: 

  • Scheme categorisation: SEBI enforces standard scheme definitions to enhance clarity, comparability, and operational transparency across fund houses, helping reduce misleading portfolio overlap. 

  • Regulatory compliance and reporting: AMCs are required to follow comprehensive governance, valuation, financial reporting, and disclosure guidelines. 

  • Disclosure timelines: Fund houses must release portfolio disclosures at SEBI-mandated frequencies, including monthly updates along with additional fortnightly disclosures for debt strategies where required. Daily NAV reporting applies to open-ended funds, while other fund structures may follow different disclosure schedules. 

Conclusion 

Mutual funds remain one of the most efficient, transparent, and accessible pathways for individuals to navigate financial markets. By aligning your selections with clear goals, maintaining a long-term mindset, and understanding regulatory frameworks, you can effectively build durable wealth. 

FAQs

You can start a Systematic Investment Plan (SIP) in most mutual funds with as little as ₹500 per month. 

No, you can invest directly through Asset Management Companies (AMCs) or online platforms in statement-of-account (folio) mode without a Demat account. 

Direct plans are purchased straight from fund houses without intermediaries, eliminating distributor commissions and lowering the expense ratio. 

Neither is universally better. Fixed deposits (FDs) offer predictable returns and capital protection subject to the bank’s terms and applicable deposit insurance limits. Mutual funds offer market-linked returns and a wider range of investment options, but carry varying levels of risk and do not guarantee returns. The right choice depends on your financial goals, investment horizon and risk tolerance. 

Yes, open-ended mutual funds allow you to redeem your units on any business day at the prevailing NAV, subject to exit loads or lock-in periods (such as ELSS). 

The expense ratio is the annual fee charged by a fund house to cover administrative, management, and operating costs. 

SEBI regulates mutual fund operations, enforces strict asset categorisation rules, and protects investor rights to ensure market transparency. 

You can switch from a Regular to a Direct mutual fund plan through your fund house’s website or app, or through an eligible investment platform. Ensure you select the Direct option before confirming the transaction. 

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