Star ratings — Morningstar, Value Research methodologies

Star ratings from agencies like Morningstar, Value Research, and CRISIL provide quick mutual fund comparisons. Each agency uses its own methodology — typically combining return, risk, and other factors into a single rating. While useful as a starting point, star ratings can be misleading if used as the sole selection criterion. Understanding what they measure and don't measure helps use them appropriately.

Major rating agencies in India

Morningstar India

Part of the global Morningstar Inc. Uses a globally-consistent methodology:

• Risk-adjusted returns over 3, 5, 10 years.
• Star rating from 1 to 5, with 5 being the highest.
• Updated monthly.

Value Research India

Long-established Indian rating service:

• Risk-adjusted returns over 3-year and 5-year periods.
• Star ratings from 1 to 5.
• Updated quarterly.

CRISIL

Indian credit rating agency that also rates mutual funds:

• Separate methodology for equity and debt funds.
• 5-star ranking system.
• Updated quarterly.

Common methodology elements

While methodologies vary, common elements include:

• Return performance over multiple time periods (3, 5, 10 years).
• Risk-adjusted returns (Sharpe ratio, alpha vs benchmark).
• Volatility measures.
• Downside risk.
• Consistency of performance.
• Comparison against category peers (not absolute).

The "vs category" anchor

Star ratings compare a fund against its category peers, not against absolute standards:

• 5-star Large Cap fund is top performer within Large Cap.
• 5-star Small Cap fund is top performer within Small Cap.
• The two are not directly comparable.

This means a 5-star Small Cap fund and a 1-star Small Cap fund might both be lower-return than a 3-star Large Cap fund.

What star ratings capture well

• Past relative performance vs peers.
• Reward for risk taken in the past.
• Consistency over evaluated time periods.

What star ratings don't capture

• Future performance (past is not predictive).
• Manager changes after the rating period.
• Specific market regime suitability.
• Costs (TER) explicitly.
• Tax efficiency.
• Behavioural fit with the investor.
• Whether the fund matches the investor's goals.

The persistence problem

The fundamental issue with star ratings: they measure past performance, but persistence of fund performance is weak:

• Studies show top-quartile fund persistence (year-on-year) is only 30-40%.
• 5-star funds today have moderate probability of being 5-star in 3-5 years.
• Buying based on past stars systematically buys the "what just worked".

The reversion-to-mean tendency

Star ratings often peak just before reversion:

• A fund earns 5 stars because of strong recent performance.
• Inflows accelerate.
• The factor / sector / style that drove outperformance reverses.
• The 5-star fund underperforms; rating drops.
• Investor returns are below the fund's own returns due to late entry.

Methodology-specific quirks

Morningstar Rating

• Heavy weight on 3-year risk-adjusted return.
• Penalises downside risk more than upside variation.
• Globally consistent methodology.

Value Research Star Rating

• Focuses on Indian context and peer groups.
• Weights consistency more.
• India-specific category definitions.

CRISIL Mutual Fund Ranking

• Categorises by sub-category beyond SEBI definitions.
• Strong India-context expertise.
• Quarterly updates.

Using ratings effectively

As a starting filter

Use ratings to narrow the universe of considered funds. Eliminate consistently low-rated funds; focus attention on consistently mid-to-high-rated funds.

As a comparison aid

Between similar funds, ratings can help decide. But verify the rating reflects current conditions.

As one signal among many

Combine with:

• Long-term performance history.
• Manager track record.
• Process and philosophy.
• Fee structure.
• Fit with your goals.

Using ratings poorly

Buying only 5-star funds

Often leads to chasing past performance. The 5-star fund this year may not be the 5-star fund next year.

Selling on rating downgrades

A 5-star fund dropping to 3 stars might be temporary; selling might lock in losses just before recovery.

Treating ratings as predictions

Ratings are descriptions of past, not forecasts of future. Treating them as predictions is the most common misuse.

The Direct plan question

Most rating agencies rate both Direct and Regular plans of the same scheme:

• Direct plans typically have slightly higher star ratings (due to lower TER).
• Some agencies provide single ratings applicable to both.

Within a scheme, Direct vs Regular doesn't change the underlying strategy.

Rating limitations across cycles

Star ratings can fail across regime changes:

• Funds rated highly in a growth-favored regime may underperform when value rotates in.
• Funds rated highly in low-rate environments may struggle in rising rates.
• Ratings reflect historical conditions, not future ones.

The new fund problem

New funds (less than 3 years old) typically can't be rated. This creates a bias toward older established funds. Some excellent newer funds get ignored due to insufficient track record for rating.

Comparing across rating agencies

Different agencies sometimes rate the same fund differently:

• Morningstar 4 stars, Value Research 3 stars.
• Methodology differences explain the gap.
• Neither is "wrong"; both are descriptions through different lenses.

Where to find ratings

• Agency websites (Morningstar India, Value Research Online, CRISIL).
• Major mutual fund platforms.
• Some AMCs display ratings.
• Personal finance press.

Star ratings as one tool

Used as one signal among many, star ratings can help. Used as the sole criterion, they systematically lead to chase-and-disappoint patterns. The fund evaluation should include process, manager, costs, and your own fit — not just the rating.

The disciplined approach

1. Use ratings as a screening tool — eliminate consistently poor performers.
2. Within the surviving universe, evaluate processes and managers.
3. Select based on alignment with your goals.
4. Don't switch based on rating changes alone.
5. Annual review: include rating trends but don't act on them in isolation.