A Systematic Investment Plan, or SIP, is a method that allows an investor to put a fixed amount of money into a mutual fund at regular intervals. Many investors use SIPs because they can reduce the need to decide when to enter the market. The investor buys more units when prices are lower and fewer units when prices are higher.
This feature can help reduce timing risk. However, an SIP does not remove every form of investment risk. This distinction becomes important when the SIP is used for a thematic mutual fund.
A thematic fund usually has a defined investment theme. The theme may relate to areas such as electric vehicles, defence, infrastructure, artificial intelligence, clean energy, manufacturing or healthcare. The fund may hold several companies, but those companies can still have a common economic link to the same theme.
As a result, regular investment can spread the investor’s purchase across different dates, but it does not automatically spread the investment across unrelated risks.
The basic idea can be stated in simple terms: an SIP can diversify the time of purchase, but it does not necessarily diversify the underlying investment exposure.
What SIP Can Help With
The main benefit of an SIP relates to the price at which units are purchased over time. Instead of investing the entire amount on one date, the investor invests smaller amounts at regular intervals.
Assume an investor puts ₹10,000 each month into a thematic fund. The fund’s unit price changes over five months. The purchases may look like this:
| Month | Unit Price | SIP Amount |
|---|---|---|
| Month 1 | ₹100 | ₹10,000 |
| Month 2 | ₹90 | ₹10,000 |
| Month 3 | ₹70 | ₹10,000 |
| Month 4 | ₹60 | ₹10,000 |
| Month 5 | ₹50 | ₹10,000 |
At ₹100, the investor receives fewer units for ₹10,000. At ₹50, the same ₹10,000 buys twice as many units.
This process can result in a lower average purchase price than a single purchase made at an unfavourable point in the market. It can therefore reduce the importance of choosing one particular entry date.
However, this benefit should not be confused with protection from losses. An SIP does not guarantee a positive return. It also does not guarantee that the average purchase price will be lower than the future market price.
The value of the units can continue to fall after the investor makes several SIP payments. The investor can therefore have a loss even after many months or years of regular investment.
Timing Risk and Theme Risk Are Different
Timing risk refers to the possibility that an investor enters an investment at an unfavourable market level. An investor who puts a large amount into a fund immediately before a major correction can face a sharp decline in portfolio value.
An SIP can reduce the effect of such a single entry decision because purchases take place over several dates.
Theme risk has a different source. It arises from the nature of the investment itself. If a fund has a strong exposure to one particular theme, events that affect that theme can affect several companies in the portfolio at the same time.
For example, consider a hypothetical fund focused on electric vehicles. The fund may own companies involved in vehicle production, batteries, components or related technology. These businesses may have different financial profiles, but they can still face common risks.
A change in consumer demand, regulation, technology, raw material prices or competition can affect several companies connected to the theme.
An SIP does not remove that common exposure.
The difference can be shown as follows:
| Type of Risk | Possible Effect of SIP |
|---|---|
| Market or timing risk | SIP can reduce dependence on one entry date |
| Theme risk | SIP does not remove the common theme exposure |
| Concentration risk | SIP does not change the fund’s investment focus |
| Valuation risk | SIP does not ensure that the theme is fairly valued |
| Business or sector risk | SIP does not protect the investor from adverse events within the theme |
This distinction is important because the two risks may appear similar to a new investor. Both can cause a portfolio to fall. Their causes, however, are different.
A Falling Theme Can Remain a Risk
Consider the same electric vehicle example. Suppose the theme becomes popular and the share prices of related companies rise sharply. Later, investors start to question the valuations of these companies. Demand also grows at a slower rate than expected.
The prices of several companies may then decline.
If the investor has an SIP in the thematic fund, the SIP does not stop. The investor continues to purchase units according to the chosen schedule.
If the unit price falls from ₹100 to ₹90, ₹70, ₹60 and ₹50, the investor receives more units for the same ₹10,000 amount. This can be useful if the theme later recovers.
But the opposite possibility also exists. The theme may not recover for a long period. Some companies may face weaker earnings, greater competition or changes in business conditions. A lower unit price does not by itself establish that the investment has become attractive or that a recovery will occur.
This is why a lower average purchase price should not be treated as a guarantee of a profitable outcome.
An SIP can make the purchase process more gradual. It cannot determine the future performance of the theme.
Why Concentration Still Matters
A common misunderstanding is that a mutual fund is automatically well diversified because it holds several securities.
The number of securities is only one part of diversification. The relationship between those securities also matters.
Suppose a thematic fund owns 40 companies. If most of those companies depend on the same economic theme, a major event that affects that theme can affect a large part of the portfolio.
By contrast, a broad-market fund may have exposure to companies from several industries. A problem in one industry may therefore have a different effect on the overall portfolio.
This does not mean that a broad-market fund cannot fall. Equity markets can decline for many reasons, and broad funds also carry market risk.
The point is narrower: different types of diversification address different types of risk.
An investor who uses an SIP in a thematic fund receives diversification across purchase dates. The investor may also receive some diversification across companies within the theme. But the investor does not necessarily receive broad diversification across unrelated economic drivers.
Valuation Risk Does Not Disappear
Another issue is valuation.
A popular theme can attract substantial investor interest. When demand for shares connected to a theme rises faster than the underlying earnings or cash flows of the companies, valuations may become high.
An SIP does not remove this valuation risk.
If an investor starts an SIP when the theme is expensive, later instalments may occur at lower prices if the valuation falls. That may reduce the average purchase cost. However, the earlier units can still show losses.
More importantly, a fall in price does not automatically mean that a security or fund is undervalued. The underlying business may also have changed.
For example, if investors expect very high growth from a group of companies and that growth does not occur, the market may revise its valuation. The share price can fall even when the company remains profitable.
Therefore, regular investment should not be viewed as a substitute for an assessment of the underlying theme, its valuations and the companies held by the fund.
SIP and Long-Term Investment
The long-term nature of an SIP can sometimes create another misunderstanding. An investor may believe that a sufficiently long investment period makes a thematic fund safe.
Time can be useful for equity investors because businesses and markets can pass through several economic cycles. However, time alone does not remove a structural risk.
A theme can change. Technology can make an existing business model less relevant. Government policy can change. Consumer preferences can shift. Competition can increase. Expected growth can fail to appear.
There is also no rule that every investment theme must perform well over every long period.
A long holding period may give a theme more time to recover, but it does not create a guarantee of recovery.
This distinction is particularly important for investors who select a thematic fund because of a strong belief in the future of its underlying idea.
A theme can be economically important and still produce poor investment returns if the companies are purchased at excessive valuations or if the expected growth has already been reflected in market prices.
The Role of a Core Portfolio
The effect of theme risk also depends on how much of an investor’s overall portfolio is placed in the thematic fund.
An investor who puts a relatively small part of a diversified portfolio into a theme has a different level of exposure from an investor who puts most of the portfolio into that same theme.
For example, an investor may hold a broad equity portfolio and use a thematic fund as a smaller additional exposure. In that situation, a decline in the theme may have a limited effect on the total portfolio, depending on the size and correlation of the holdings.
If the thematic fund forms a very large part of the portfolio, the same theme-specific decline can have a much greater effect.
The important issue is therefore not only whether an SIP is used. It is also the size and nature of the underlying exposure.
An SIP schedule does not change that allocation by itself.
A Simple Comparison
The difference between a diversified fund and a thematic fund can be understood through the following simplified example.
| Feature | Broad-Market Fund | Thematic Fund |
|---|---|---|
| Investment focus | Wider market exposure | Specific theme or group of related industries |
| Company diversification | Usually broader | May be narrower or more theme-linked |
| Theme-specific exposure | Usually lower | Usually higher |
| SIP benefit | Can reduce timing dependence | Can reduce timing dependence |
| Theme risk | Usually less central to the strategy | Can be a major source of risk |
| Effect of a theme-specific shock | May be more limited | Can affect several holdings |
This table does not establish that one type of fund will produce better returns than the other. Returns depend on many factors, including valuations, company performance, economic conditions, portfolio construction, fees and market cycles.
The table only explains why an SIP cannot be treated as a complete answer to concentration or theme risk.
What Happens During a Major Correction
A major correction can make the distinction easier to understand.
Assume an investor has already made several SIP payments in a thematic fund. The theme then experiences a sharp decline.
The value of existing units falls because the market price of the underlying securities falls. Future SIP payments purchase more units if prices remain lower.
This creates two separate effects.
The existing investment is exposed to the decline. The new SIP payments receive more units at the lower price.
The second effect can benefit the investor if prices later recover. However, if the theme continues to weaken, the investor remains exposed to further losses.
The result depends on what happens after the purchases are made.
Thus, an SIP can create a disciplined purchase process during a decline, but it does not make the decline harmless.
What Investors Should Separate
For analytical purposes, investors may find it useful to separate three questions.
The first question is whether the chosen investment date is favourable. An SIP can reduce dependence on that decision.
The second question is whether the underlying theme has attractive long-term prospects. An SIP does not answer this question.
The third question is how much of the total portfolio depends on that theme. An SIP also does not answer this question.
These are separate portfolio decisions.
A person can therefore use an SIP correctly and still hold a portfolio with substantial theme risk.
No Automatic Protection From Loss
It is also important to avoid describing SIP as a form of protection against loss.
An SIP is an investment method, not an insurance product. It does not protect the principal. It does not establish a minimum return. It does not prevent market declines.
The final result depends on the price paid for the units, the number of units accumulated, the performance of the underlying securities and the price at which the investment is eventually valued or sold.
For a thematic fund, the performance of the underlying theme can be an important part of that result.
This is why statements such as “SIP removes risk” can be misleading if they are not qualified. A more precise statement is that SIP can reduce the effect of market-entry timing, while other risks continue to remain.
Conclusion
Regular investment through an SIP can be a useful way to spread purchases over time. It can reduce the importance of selecting one particular market-entry date and can result in the purchase of different numbers of units at different prices.
That benefit, however, should not be confused with diversification of the investment itself.
When the SIP is used in a thematic fund, the investor remains exposed to the theme chosen by the fund. If several portfolio companies are affected by the same economic, regulatory, technological or competitive factor, the fund can experience a decline even though the investor has followed a disciplined SIP schedule.
The example of ₹10,000 per month illustrates the distinction clearly. At ₹100, the investor buys fewer units. At ₹50, the investor buys more units. This changes the average purchase experience. It does not change the underlying theme.
In simple terms, SIP addresses the question of when money enters the market. It does not, by itself, address what the money is exposed to after it enters the market.
For this reason, an investor who considers a thematic SIP may need to examine the fund’s theme, portfolio concentration, valuation levels, underlying companies and the role of the fund within the investor’s wider portfolio. The appropriate assessment will depend on the investor’s circumstances, objectives, risk capacity and investment horizon.
No particular investment approach can assure a profit or prevent a loss. A thematic SIP can provide a structured method of investing, but the risks associated with the selected theme continue to apply.
ALSO READ: SIF Certification Rules: How the New Regime Changes Distribution
