Differences Between Index Funds and Smart Beta Funds | UTI Mutual Fund

Many mutual fund investors discover that there are varied strategies for investing their money, ranging from passive managed strategies to actively managed portfolios. Amongst all that, ‘smart beta’ has come up as a popular middle ground, aiming to offer the best of both worlds. So, when the question of traditional index funds vs smart beta funds arises, why might an investor choose one over the other? In this article, we try to answer these questions, along with the various smart beta mutual fund strategies, their advantages and how you should incorporate them in your portfolio.


Understanding Index Funds

An index fund is a passively managed mutual fund that mirrors the returns of a specific market index, for example the Nifty 50, the S&P 500, or another benchmark. An index fund manager does not try to beat the market with active stock picking as such. All they do is buy the same stocks (or bonds) in the same weightage as the underlying index, The goal is to match the index’s returns, minus expenses.

Key Characteristics of Index Funds

  • Low Cost: Because there’s minimal research or trading required, index funds typically have lower management fees.
  • Simplicity: It’s easy to track performance and understand holdings, since the portfolio composition mirrors a well-known index.
  • Diversification: By following a broad index, these funds often encompass multiple industries and companies, providing built-in risk spreading.
  • Transparency: Investors can easily see what’s inside the fund by looking at the index’s composition.

Index funds work best for investors looking for a low-cost, long-term investment that captures the broad market’s returns. They can be particularly appealing to those who don’t want the risk of potential underperformance associated with active stock-picking funds.


What Is a Smart Beta Fund?

A smart beta fund - sometimes called a ‘factor-based’ or ‘enhanced index’ fund - is a fund that sits somewhere between passive and active approaches. Smart beta strategies are index that uses an alternate index weighing strategy, where indices are constructed  using factors like momentum, low volatility etc with the endeavour to outperform the broad indices.

The examples of these factors include:

  • Value Funds: Invest in stocks trading at a price lower than their intrinsic value based on metrics like low price to earnings, price to book value etc.
  • Quality Funds: Focus on stocks with strong fundamentals, high profitability, low debt to equity and consistency of earnings.
  • Low Volatility Funds: Select stocks with lower historical price volatility.
  • Momentum Funds: Target stocks with strong recent price performance.
  • Equal Weighted Funds: Even allocation across constituents instead of market-cap weighting.
  • Multifactor Funds: Combination of multiple factors like Alpha, Low Volatility, quality, Momentum etc.
     

These factors reflect academic research that suggest certain traits will give potentially superior results over the long run.

How Smart Beta Works

  • Starting Point: A smart beta fund begins with universe of a broad index, like the Nifty 100 or Nifty 200, but doesn’t simply replicate it.
  • Factor Screening: The fund then screens and selects stocks that exhibit specific attributes—such as high momentum or low volatility.
  • Weight Assignment: The selected stocks are then assigned weights on the basis of their factor score along with their free float market capitalisation   
  • Rebalancing: A smart beta mutual fund periodically rebalances based on updated factor metrics. Because certain factors can change over time, ongoing monitoring is essential.


Why Consider Smart Beta Funds?

Fundamentally, the main reason you may invest in a smart beta fund is that it not only compares more favourably on return or risk than a passive standard index fund but also offers higher transparency and fewer costs compared to pure active management. 

Systematic application of factor-based rules in 'smart beta' is designed for subjective stock picking and removing the potential emotional biases often present in actively managed funds.

Key Differences Between Index Funds and Smart Beta Funds

While both index funds and smart beta funds might be considered part of the “passive” investing family, there are significant distinctions:

 Aspect

Traditional index funds

Smart beta funds

Objective

Replicate the performance of a market-cap-weighted index.;

Replicate the performance of a indices constructed with alternate index weighing methodology i.e. using factors

Weighting methodology

Market capitalisation-based (larger companies get higher weight).
 

Factor-based, such as momentum, low volatility, quality, value, etc.

Cost

Lower expense ratio due to pure passive management.

Lower expense ratio as compared to actively managed schemes, however slightly higher expense ratio when compared with market cap based index funds due to complex strategies.
 

Performance

Tracks broad market performance.

Tracks performance of the underlying index with the endeavour to outperform broad indices.

Actively managed funds vs. Smart beta funds

 Aspect

Actively managed funds

Smart beta funds

Objective

Aim to outperform the market by leveraging manager expertise.

Aim to outperform the broad markets by using systematic factor-based strategies.

Management style

Fully active, with fund manager discretion.

Rule-based, following predefined factor models.

Cost

Higher expense ratio due to active management.

Lower expense ratio compared to active funds, but higher than market cap based index funds.

Performance

Dependent on fund manager’s skill; can vary widely.

More consistent, as performance relies on rules, not discretion.

Transparency Relatively lower transparency; portfolio changes may not be disclosed immediately Relatively higher transparency, as rules are predefined and publicly known.
Examples Actively managed equity funds, sector-specific funds. Funds based on factors such as Momentum, Low Volatility, Quality and Value

Evaluating Smart Beta Funds in India

In recent years, smart beta funds India have gained traction, offering investors exposure to systematic, factor-based investing. Several asset management companies have rolled out smart beta funds options tracking indices like Nifty 200 Momentum 30 BSE Low Volatility 30 or combining multiple factors such as momentum, and quality.

Pros: 

  • Access to academically backed factors like value, momentum, low volatility, or quality in a single product.
  • Potential for enhanced returns or risk-adjusted returns.

Cons:

  • Not guaranteed to outperform in all market conditions. Factors can underperform for extended periods.
  • Slightly higher expense ratios than plain-vanilla index funds.


Pros and Cons of Index Funds vs. Smart Beta Funds

Index Funds

Pros: 

        ◦ Low costs, straightforward approach
        ◦ Widely diversified
        ◦ Historically tough for many active funds to beat index funds over the long term

Cons

        ◦ No chance of exceeding market returns
        ◦ Fully exposed to market cap weighting biases 

Smart Beta Funds

  Pros

        ◦ Potential to outperform traditional market-cap indices by focusing on factors with proven historical outperformance
        ◦ Offers rule-based discipline, avoiding emotional biases in stock selection

  Cons

        ◦ Factors can fall out of favour, leading to periods of underperformance
        ◦ Higher expense ratios and turnover compared to plain index funds
        ◦ Factor-based results can vary widely depending on the chosen methodology


Making the Right Choice

Choosing between a standard index fund and a smart beta fund often boils down to:

  •  Investment Objective

        ◦ If you’re satisfied with market-matching returns, an index fund is a simple, low-cost approach.
        ◦ If you seek possible incremental gains (or enhanced risk-adjusted performance), a smart beta strategy might be appealing.

  •   Risk Tolerance

        ◦ Market-cap indices might carry certain concentrations (like heavy weighting in a few large companies).
        ◦ Smart beta, depending on the factor, can also create concentrations in certain styles, risking underperformance if that style is out of favour.

  •  Time Horizon

        ◦ Factors often need time to pay off, so a short-term horizon might see more volatility or less predictable returns from smart beta strategies.
        ◦ Over the long haul, certain factors—like quality and low volatility—have historically delivered outperformance, albeit with no guarantees.

  • Costs

        ◦ Compare expense ratios, bid-ask spreads (for ETFs), and any associated management or advisory fees. Even a fraction of a percentage point can erode returns over decades.

Conclusion

Index and smart beta funds are for investors who want a systematic investment approach to the market. Index funds are simple and offer low expenses serving to match broad market returns. They may be more suitable for beginner investors. Smart beta strategies provide some factor-based choice in hopes with potential of generating higher returns or less volatility than the traditional index. In the end, it is often a matter of comfort with factor investing, tolerance for periods of underperformance, and amount of fees you are willing to pay for a shot at outperforming the market. Whether you prefer one or another, staying informed about how each strategy works - and how it aligns with your financial goals - is key to successful long-term investing.

Mutual Fund investments are subject to market risks, read all scheme related documents carefully.

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Date of Publication
27-02-2025
Author Name
Ayush Jain
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Fund Manager
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