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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsSectoral funds invest at least 80% of assets in one industry sector, such as banking, information technology or pharmaceuticals. Thematic funds also have an 80% minimum in relevant equity and equity-related instruments, but can select companies from several sectors connected by an idea such as infrastructure, energy, public-sector enterprises or multinational companies. Thematic funds may therefore be broader than sectoral funds, but both are concentrated equity strategies that can underperform for long periods.
Sectoral and thematic funds at a glance
The practical difference is the size of the investment universe. A sectoral fund stays within one defined part of the economy. A thematic fund follows a common economic idea that may span several industries. A banking fund, for example, can own banks and other companies classified within banking. An infrastructure fund could hold companies involved in cement, power and steel.
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| Comparison point | Sectoral mutual fund | Thematic mutual fund |
|---|---|---|
| Investment mandate | One specific sector of the economy | Companies and sectors connected by a defined theme |
| Examples cited by SEBI | Banking, information technology and pharmaceuticals | Multinational companies, public-sector enterprises, energy and infrastructure |
| Minimum relevant equity allocation | 80% of total assets under SEBI’s February 26, 2026 categorization circular | 80% of total assets under the same circular |
| Potential diversification | Usually limited because exposure is tied to one industry | Can be wider because several industries may contribute to the theme |
| Main concentration risk | One industry’s business cycle, regulation, valuation and earnings | Whether the shared idea creates earnings across all of its component sectors |
| Risk assessment | Read the scheme’s current holdings and Riskometer; concentration can make losses severe | Read holdings and the Riskometer; a broader theme is not the same as a diversified equity fund |
Neither label tells you which fund will perform better. Performance depends on the securities held, the price paid, portfolio construction and the economic cycle. Official SEBI material does not provide a comparable historical-return figure for the two categories, so a past-return ranking should not be inferred from the labels.
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One industry is the investment universe
SEBI’s FAQ defines a sectoral fund as one that “invests in stocks belonging to specific sector of the economy, in order to take advantages within the said sector.” Banking, information technology and pharmaceutical funds are examples given in the FAQ. The portfolio manager’s choices remain bounded by the scheme’s sector definition, even when the fund owns many companies within that sector.
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A sector can contain businesses with different sizes, business models and balance-sheet quality. That internal variety does not remove the common exposure: a banking fund is still affected by credit growth, loan losses, interest-rate conditions and banking regulation; an information-technology fund is still exposed to technology-services demand, currency movements and corporate technology budgets. Those are illustrations of how a sector cycle can affect holdings, not forecasts of returns.
What the 80% rule means for investors
Under SEBI’s February 26, 2026 categorization circular, a sectoral fund is an open-ended equity scheme that must invest a minimum of 80% of total assets in equity and equity-related instruments of the particular sector. The remaining assets, if any, do not turn the scheme into a diversified fund: the mandate still makes the selected sector the dominant source of risk. Check the scheme information document for the precise definition and the treatment of permitted non-equity holdings.
What is a thematic mutual fund?
A shared idea can cross industry boundaries
SEBI’s FAQ says, “Compared to sectoral fund thematic funds are more broad-based, as they pick companies and sectors united by an idea.” The examples in the FAQ include multinational-company, public-sector, energy and infrastructure funds. An infrastructure theme may include cement, power and steel companies because those industries contribute to building or operating infrastructure.
The theme is the link among holdings; it is not necessarily a single industry classification. A public-sector theme could include companies from banking, energy, transport or other industries if they meet the scheme’s definition. An energy theme might span producers, utilities, equipment makers and related businesses. The breadth depends on the fund’s written mandate and the manager’s interpretation, so two funds carrying a similar theme can own materially different portfolios.
The same 80% minimum, with a different scope
The 2026 SEBI circular gives thematic funds the same minimum allocation: at least 80% of total assets in equity and equity-related instruments focused on the particular theme. “Theme” does not mean the fund can invest anywhere without limits. Read the scheme information document to see which sectors, company characteristics or revenue tests qualify and how the manager handles companies that move outside the theme.
How the regulatory rules affect your decision
80% is a concentration floor, not a return promise
The 80% requirement tells you how strongly the mandate must be expressed. It does not guarantee that 80% will be invested in the best-performing companies, nor does it limit losses when the relevant sector or theme falls. Equity and equity-related instruments can decline in value, and the concentrated portion can dominate the result of the entire portfolio.
The 50% portfolio-overlap condition
SEBI’s February 26, 2026 circular also requires sectoral and thematic schemes to ensure no more than 50% portfolio overlap with other equity schemes in the sectoral/thematic category and with other equity categories, except large-cap schemes. The overlap is calculated quarterly using average daily overlap values.
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This rule is a category-level safeguard, not a personal diversification guarantee. Two funds can satisfy the regulatory condition while still exposing your household portfolio to the same company, industry or economic factor through several holdings. Compare your own funds’ top positions and sector weights rather than assuming that different scheme names eliminate duplication.
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Use the Riskometer with the mandate
SEBI’s Riskometer is a visual representation of a mutual-fund scheme’s risk level and applies to all mutual-fund categories. Read the current Riskometer alongside the investment mandate, portfolio concentration and largest holdings. The label is a starting point for risk awareness; it does not describe every way a narrowly focused portfolio can lose money or how long recovery might take.
Are thematic funds more diversified?
They can be more diversified than sectoral funds because the theme may include several industries, but “more diversified” is relative. A theme can be dominated by one sector, a few large companies or one economic policy. For example, an infrastructure portfolio that is heavily weighted to construction-material producers may behave more like a sector bet than its name suggests.
Count and classify the holdings yourself. Ten companies spread across cement, power, steel and engineering represent a different set of risks from ten companies that all earn money in one industry. Conversely, a sectoral fund owning many banks can have more individual-stock diversification than a thematic fund holding only a handful of companies across loosely related industries. Industry count is useful, but it is not a complete measure of risk.
Where the two categories get their risk
Sectoral funds: one cycle can dominate the result
Returns are heavily tied to the selected industry’s demand, pricing power, regulation, capital needs and competitive conditions. A sector can enjoy a strong earnings period and then face excess capacity, tighter regulation or weaker demand. Because the fund cannot simply move into unrelated industries when the sector weakens, its performance can diverge sharply from a broad equity fund.
Thematic funds: one idea must work across sectors
A theme can fail even when individual companies remain healthy. The idea may take longer than expected to translate into profits, policy support may change, or companies from different industries may respond differently to the same macroeconomic conditions. A theme may also become expensive after investors bid up the companies associated with it. The manager must find suitable businesses across the theme, but the portfolio remains linked to the success of that common idea.
What SEBI says about concentration
SEBI Investor warns: “Higher Returns(with Risks): These funds can generate high returns if the chosen sector performs well, but they also carry higher risk because they lack diversification across industries.” The statement applies to the central trade-off in both categories: concentration can amplify gains when the thesis is right and losses when it is wrong.
Sectoral versus thematic: the decision factors that matter
| Question | Sectoral fund | Thematic fund |
|---|---|---|
| What must the manager select? | Companies belonging to one specified sector | Companies and possibly several sectors united by the scheme’s theme |
| How can diversification occur? | Across companies within the same sector | Across companies and industries that qualify for the theme |
| What should you inspect first? | Sector definition, industry weights, company concentration and cycle exposure | Theme definition, sector mix, revenue or eligibility tests and company concentration |
| What can make the fund behave unexpectedly? | A change in the industry’s cycle or regulatory environment | A theme that is narrower in practice than its name suggests, or uneven results across sectors |
| How does the 2026 rule apply? | At least 80% in relevant equity and equity-related instruments; quarterly average daily overlap capped at 50% with specified other equity categories | The same 80% minimum and overlap condition |
| Who should be cautious? | Anyone unable to tolerate a long period driven by one industry’s weakness | Anyone assuming a theme is automatically diversified or broad-market-like |
How to evaluate a fund before investing
1. Start with the legal mandate
- Open the latest scheme information document and identify the exact sector or theme definition.
- Confirm the 80% minimum allocation and read what instruments can make up the balance.
- Note any eligibility tests, such as business activity, ownership status, geography or revenue exposure, that determine whether a company qualifies.
Do not rely on the fund name alone. A theme’s written boundaries determine what the manager may actually buy.
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- Record the latest sector weights, top 10 holdings and each holding’s portfolio percentage.
- Separate direct industry exposure from companies whose revenues are only indirectly related to the theme.
- Look for concentration in one company, one industry, one state-owned group or one policy-sensitive activity.
Holdings change. Use the most recent portfolio disclosure available to you and date your notes so an old allocation is not mistaken for today’s exposure.
3. Check your existing funds for overlap
List the largest holdings and sector weights in your diversified, sectoral and thematic funds. The SEBI 50% overlap condition does not compare every combination in your personal account, and it does not remove common exposure through different securities in the same industry. Your own look-through check is therefore essential.
4. Read the Riskometer and test your tolerance
Record the scheme’s current Riskometer level, then ask what you would do if the fund lagged a broad equity benchmark for several years. A concentrated strategy is unsuitable if a temporary-looking decline would force you to sell, because selling during a sector or theme downturn converts volatility into a permanent loss.
5. Match the position to a time horizon
Use money that does not have a near-term spending date. The category can remain out of favour while the underlying companies adjust capacity, repair balance sheets or wait for demand. The appropriate horizon depends on your goal and risk capacity; the category label cannot supply that answer.
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Many investors treat a broad diversified equity fund as a core holding and use a sectoral or thematic fund only as a smaller satellite allocation. That is a portfolio-construction principle, not an individualized recommendation. The more concentrated the satellite, the more important it is to cap its size so one thesis cannot determine the outcome of an essential goal.
7. Get regulated advice when the decision is material
If the investment would fund a major goal, materially change your asset allocation or duplicate existing exposures, consider a SEBI-registered investment adviser. Provide the adviser with your complete holdings, goals, time horizon and ability to tolerate losses; a fund’s Riskometer alone cannot establish suitability.
Common mistakes and how to correct them
Mistake: treating a theme as a diversified fund
Why it fails: several industries can still share one policy, valuation or economic risk.
Correction: read sector weights and top holdings, then compare them with your other funds.
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Mistake: buying after a spectacular sector rally
Why it fails: a strong recent price move can raise valuations and attract investors after much of the optimism is already reflected.
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Correction: evaluate the mandate, current valuation information and your ability to hold through a reversal instead of extrapolating a past move.
Mistake: assuming many holdings mean low risk
Why it fails: companies in one sector can decline together, and a theme can contain correlated industries.
Correction: measure concentration by sector, company and economic driver, not only by the number of lines in the portfolio.
Mistake: ignoring overlap across your account
Why it fails: a broad fund may already own the same large companies that appear in the focused fund.
Correction: compare top holdings and industry weights across every equity scheme you own.
Mistake: using the Riskometer as a complete suitability test
Why it fails: the Riskometer is a standardized visual risk representation, while your personal risk depends on goals, cash-flow needs, existing assets and behaviour during losses.
Correction: combine the Riskometer with the mandate, holdings, overlap review and a written plan for rebalancing.
Mistake: assuming the 80% rule protects capital
Why it fails: the rule specifies where assets are invested; it does not set a minimum return or prevent equity losses.
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Correction: regard the 80% threshold as evidence of concentration and size the position accordingly.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Illustrative ways the categories can behave
A banking sector fund
The portfolio may contain several banks, but all are exposed to lending growth, credit quality, interest rates and financial regulation. If those conditions deteriorate together, diversification among banks may not offset the sector shock.
An infrastructure thematic fund
The holdings could include cement, power and steel companies. Those industries are connected to infrastructure spending, yet each has different cost structures, capacity cycles and regulatory sensitivities. The fund may therefore spread risk across industries while retaining a common dependence on infrastructure activity.
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A public-sector thematic fund
The theme can span financial, energy, transport or other companies linked by public ownership. The relevant risk is not just each company’s industry; it can also include government policy, ownership objectives and changes in the public-sector investment landscape.
These examples explain the mechanics, not expected performance. The actual portfolio, mandate and market conditions determine the result.
How to monitor a holding after purchase
- Review the mandate when documents change: confirm that the sector or theme definition still matches your original reason for investing.
- Check portfolio disclosures: watch for a rising weight in one company, industry or policy-sensitive group.
- Recalculate household overlap: compare the focused fund with new investments and rebalanced broad funds.
- Track the Riskometer: note changes, but interpret them with the portfolio and your financial circumstances.
- Use a pre-set rebalancing rule: decide in advance when a satellite position becomes too large or the investment thesis no longer applies.
- Do not trade solely on headlines: a news-driven reaction can replace a long-term allocation plan with short-term timing.
A review should answer whether the fund still performs the role you assigned it, not whether it beat another category over a brief interval.
Questions to answer before choosing between them
- Can I explain in one sentence what economic exposure I am buying?
- Would a decline caused by that one sector or theme jeopardize an essential financial goal?
- What percentage of my total equity portfolio is already exposed to the same companies or industries?
- Does the current portfolio match the written mandate, or is the name doing most of the marketing work?
- Am I selecting this fund because of a long-term thesis or because of a recent performance chart?
- Have I read the latest scheme information document, portfolio disclosure and Riskometer?
- Would regulated, personalized advice improve the decision given my goals and existing assets?
Bottom line
A sectoral mutual fund makes a concentrated bet on one industry; a thematic mutual fund makes a concentrated bet on an idea that can cross industries. Both must invest at least 80% of total assets in their relevant equity and equity-related instruments under SEBI’s February 26, 2026 categorization circular, and both are subject to the circular’s 50% quarterly average daily portfolio-overlap condition with specified other equity categories. Thematic funds may be more broad-based, but neither category should be mistaken for a core diversified equity holding.
Choose only after reading the mandate, inspecting current holdings, checking overlap with your complete portfolio, reviewing the Riskometer and confirming that you can tolerate a long period of underperformance. For many investors, these funds are better considered satellite allocations around a diversified core; the right allocation depends on personal circumstances and, where needed, advice from a SEBI-registered adviser.
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