📊 Methodology

How the BullWiser Score Works

A complete, transparent breakdown of how we score 14,000+ Indian mutual funds — the data we use, the math behind it, and why we built it this way.

A 0–10 Score. No Hidden Agenda.

Every fund on BullWiser receives an Honest Score from 0 to 10, calculated purely from public AMFI data. No fund pays us to be rated higher. No distributor influences our algorithm. The score reflects four things: how well the fund performed, how cheaply it operates, how safely it delivered returns, and how good its underlying portfolio is.

8.0
/ 10

Example: A fund scoring 8.0 / 10

Returns Pillar: 2.5 / 3  ·  Cost Pillar: 2.5 / 3  ·  Risk Pillar: 1.7 / 2  ·  Quality Pillar: 1.3 / 2

Verdict: HIGH QUALITY — recommended for long-term equity exposure.

Four Pillars. Ten Points.

Each fund is evaluated across four independent dimensions. Each pillar has a fixed maximum, and the four pillars sum to 10. We chose these four because they capture the complete risk-return-cost picture that a long-term retail investor actually needs.

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Pillar 1 — Returns
3 / 10 pts
1Y, 3Y, and 5Y CAGR vs category peers. Measured on percentile rank, not raw number. A fund in the top 20% of its category scores full marks.
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Pillar 2 — Cost
3 / 10 pts
Total Expense Ratio (TER) vs SEBI-mandated limits and category peers. Direct plans score higher. Regular plans with high TER lose points here.
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Pillar 3 — Risk
2 / 10 pts
Sharpe Ratio (return per unit of risk) and Maximum Drawdown (worst peak-to-trough fall). A fund that loses 50% in a crash scores poorly here even if it recovers.
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Pillar 4 — Quality
2 / 10 pts
Fund age (>5 yrs preferred), AUM size (too small = liquidity risk), and portfolio concentration. Newer funds with <3Y history get UNDER EVALUATION.

Returns — How We Measure Performance

Raw returns are misleading. A fund that returned 40% in one year looks great — but if its entire category averaged 45%, it actually underperformed. We measure returns using category-relative percentile rank.

Returns Score Formula
Percentile Rank = (funds beaten ÷ total funds in category) × 100
3 pts → Top 20th percentile (beats 80%+ of category peers)
2 pts → 20th–50th percentile (above median)
1 pt → 50th–75th percentile (below median but not worst)
0 pts → Bottom 25th percentile (consistent underperformer)

We evaluate returns across three horizons — 1Y, 3Y, and 5Y — weighting longer timeframes more heavily. A fund with a great 1Y return but poor 3Y and 5Y numbers will score lower than one with consistent long-term outperformance.

Why 3 timeframes?

  • 1Y return — Captures recent momentum, useful for tactical assessment
  • 3Y CAGR — Captures a full market cycle (includes a bull and a correction)
  • 5Y CAGR — Captures long-term compounding ability and fund manager consistency

Cost — The Silent Wealth Killer

TER (Total Expense Ratio) is deducted daily from your NAV. A 1% difference in TER over 20 years can mean losing 20–25% of your final corpus. We penalise high-TER funds aggressively because the evidence is clear: lower costs correlate strongly with better long-term investor outcomes.

Cost Score Formula
TER Gap = Fund TER − Category Average TER
3 pts → TER is >0.3% below category average (very efficient)
2 pts → TER is within ±0.3% of category average
1 pt → TER is 0.3–0.8% above category average
0 pts → TER is >0.8% above category average (expensive)

This is the pillar where Direct plans almost always beat Regular plans. A Direct plan typically has a TER 0.5–1.5% lower than its Regular equivalent — which automatically earns it 1–2 extra points in this pillar. This is not bias; it is mathematical reality.

Risk — Returns Mean Nothing Without Context

A fund that gained 20% by taking enormous risk is not better than one that gained 15% by taking moderate risk. We use two standard risk metrics used globally by institutional investors.

Sharpe Ratio (Return per unit of risk)
Sharpe Ratio = (Fund Return − Risk-Free Rate) ÷ Standard Deviation
Risk-Free Rate ≈ 6.5% (India 10Y G-Sec yield proxy)
1 pt → Sharpe > 0.8 (good risk-adjusted return)
Maximum Drawdown (Worst-case loss from peak)
Max Drawdown = (Trough NAV − Peak NAV) ÷ Peak NAV × 100
1 pt → Drawdown < 20% (controlled downside)

Both metrics require at least 3 years of NAV history to compute reliably. Funds with less history are marked UNDER EVALUATION and these 2 points remain unscored.

Quality — Is the Fund Itself Trustworthy?

Even a well-performing fund can be problematic if it is too small to liquidate, too new to assess, or too concentrated in a few stocks. This pillar evaluates the fund's structural soundness.

Quality scoring components

  • Fund Age (0.5 pts): Funds older than 5 years score full marks. 3–5 years: partial. Under 3 years: UNDER EVALUATION.
  • AUM Size (0.5 pts): Funds with AUM under ₹100 Cr in equity face liquidity risk. Funds over ₹500 Cr score full marks.
  • Portfolio Concentration (1 pt): If top 5 holdings exceed 60% of the portfolio, concentration risk reduces score. Well-diversified portfolios score higher.

From Score to Verdict

Every fund receives a human-readable verdict based on its total score:

Score Range Verdict What It Means
7.0 – 10.0 HIGH QUALITY Strong across all 4 pillars. Suitable for long-term SIP or lump sum for eligible investors.
5.0 – 6.9 AVERAGE Decent fund, but one or more pillars show weakness. Review before investing.
3.5 – 4.9 BELOW AVERAGE Underperforms peers or charges excessive fees. Better alternatives likely exist.
0 – 3.4 POOR QUALITY Fails across multiple pillars. Existing investors should consider switching after evaluating tax implications.
Any score UNDER EVALUATION Fund is less than 3 years old. Insufficient history for reliable scoring. Watch but don't commit large amounts.

What We Deliberately Don't Do

Our scoring is free of the following influences:

  • ❌ We do not receive payments from AMCs or fund houses to rank funds higher
  • ❌ We do not earn trail commissions from Regular plan sales
  • ❌ We do not factor in marketing spend, brand size, or AMC popularity
  • ❌ We do not manually override algorithmic scores for any fund
  • ❌ We do not use "sponsored" or "featured" labels as proxies for quality
  • ✅ We actively recommend Direct plans over Regular plans — which reduces distributor income from our users
  • ✅ All data comes from AMFI India and MFApi.in — official, freely available public sources

Frequently Asked Questions

What is the BullWiser Score?
The BullWiser Score is a 0–10 composite rating for Indian mutual funds, calculated across four evidence-based pillars: Returns (3 pts), Cost Efficiency (3 pts), Risk-Adjusted Performance (2 pts), and Portfolio Quality (2 pts). A score of 7+ earns the HIGH QUALITY verdict.
How often is the score updated?
Fund scores are recalculated weekly using fresh NAV data from AMFI India and MFApi.in. TER data is updated monthly when AMFI publishes its new disclosures. The scanner always shows the most recently computed score.
Why do some funds show UNDER EVALUATION?
Funds with less than 3 years of NAV history are marked UNDER EVALUATION because there is insufficient data to compute reliable rolling returns, drawdown, or Sharpe ratio. The score shown is indicative only. We recommend watching these funds for at least one full market cycle before committing significant capital.
Does BullWiser earn commissions from fund recommendations?
No. BullWiser earns zero commissions from any AMC, distributor, or fund house. The scoring algorithm is entirely automated from public AMFI data. BullWiser actively encourages investors to switch from Regular to Direct plans — which reduces distributor commissions. Our business model is based on a subscription tool, not on selling funds.
Is the BullWiser Score a buy/sell recommendation?
No. The BullWiser Score is an analytical tool to help investors understand a fund's relative strengths and weaknesses. It is not a SEBI-registered investment recommendation. You should always consider your personal risk profile, investment horizon, and tax situation before investing. For personalised advice, consult a SEBI-registered investment adviser.

Important Disclaimer: BullWiser is not a SEBI-registered investment adviser. The BullWiser Score is an algorithmic, data-driven analytical tool for educational purposes only. It does not constitute investment advice, a buy/sell recommendation, or a guarantee of future returns. Mutual fund investments are subject to market risks. Please read all scheme-related documents carefully before investing. Past performance is not indicative of future results.