Why Your Consultancy's Market Report Is Useless for Investment Decisions
71% of PE deals miss margin projections. The firms doing the commercial DD are telling you the CDD is not working.
71%
of PE investments fell short of projected margins.
Average miss: 330 basis points below deal model forecast.
Bain & Company, 65-deal study (October 2019)
The Paradox
Private equity firms spend approximately $200,000 per week on commercial due diligence from top-tier consultancies. A typical market study runs three weeks. That is roughly $600,000 to answer three questions: How big is the market? What are the growth trends? Who are the competitors?
And yet, according to Bain's own analysis of 65 mature deals, 71% of investments fell short of projected margins by an average of 330 basis points. The consultants doing the due diligence are publishing data showing the due diligence is not working.
This is not a criticism of consulting firms. The problem is not the report. It is what the report is designed to answer.
PE Deal Margin Performance vs. Projections (Bain 65-Deal Study)
Source: Bain & Company, "Integrating Due Diligence to Build Lasting Value" (October 2019)
Market Reports Answer the Wrong Question
Your $600,000 market study answers the question you asked:
- What is the total addressable market?
- What are the growth trends?
- Who are the competitors?
It does not answer the question you need answered:
- Should I do this deal at this price?
A market report is a map. It tells you the terrain exists. It does not tell you whether your vehicle can cross it.
The Structural Problem
Commercial due diligence tells you the market is $4.2B growing 8% annually. It does not tell you whether this specific target can capture that growth, or what would prevent it from doing so.
When Market Sizing Goes Wrong
Case Study: McKinsey and AT&T's Mobile Phone Forecast (1980)
In 1980, AT&T commissioned McKinsey & Company to forecast U.S. cell phone subscribers by 2000.
McKinsey Prediction
900,000
Actual (2000)
109 million
McKinsey was off by a factor of 121x.
The consequence: AT&T decided cellular was a niche market and exited. A decade later, to rejoin, they acquired McCaw Cellular for $12.6 billion.
McKinsey's AT&T Cell Phone Forecast vs. Reality
Note: Y-axis uses logarithmic scale to show magnitude of error
The Broader Pattern
The McKinsey/AT&T case is not an outlier. Harvard Business Review has documented persistent M&A failure rates across decades of research.
M&A Failure Rates by Source
| Source | Finding | Year |
|---|---|---|
| Clayton Christensen, HBS | "70-90% of acquisitions are abysmal failures" | 2011 |
| Roger Martin, Rotman School | "M&A is a mug's game, in which 70% to 90% fail" | 2016 |
| Bain & Company | 71% of PE deals missed margin projections by 330bp | 2019 |
| Harvard Business Review | "Between 70 and 90 percent of acquisitions fail" | 2020 |
Why CDD Does Not Prevent Bad Deals
Bain's research identified the root cause: siloed due diligence.
"Firms and their advisers tend to structure diligence as a series of discrete questions about the target company's strategy, its commercial prowess or its cost structure, as if those things had no connection to each other."
Bain & Company, 2019
The problem is not that consultants cannot size markets. They can. The problem is that market sizing is one input to an investment decision, not the decision itself.
What CDD Delivers
- Market size and segmentation
- Growth rate projections
- Competitive landscape
- Customer analysis
What Investment Decisions Need
- Kill criteria: What would make you walk away?
- Confidence calibration: How certain are we?
- Interconnected analysis: How do risks compound?
- Recommendation: Should you proceed?
The Three Missing Elements
| Element | What It Is | Why CDD Does Not Provide It |
|---|---|---|
| Kill Criteria | Specific findings that should stop a deal | CDD is descriptive, not prescriptive. It documents; it does not recommend. |
| Confidence Calibration | How certain we are about each key assumption | CDD rarely distinguishes between high-confidence findings and educated guesses. |
| Decision Framing | Given all of this, should you proceed? | CDD ends with "here is what we found," not "here is what you should do." |
The Fundamental Gap
Most CDD is descriptive. It tells you WHAT the market looks like. Investment decisions need diagnostic intelligence. Analysis that tells you WHY it matters for this specific deal and WHAT you should do about it.
What You Actually Need
The Bain report concludes that PE firms with better outcomes adopt an "integrated due diligence" approach. But that is still within the CDD framework. Bigger scope, higher cost.
The alternative is to recognize that market sizing and investment intelligence serve different functions:
| Commercial DD (Market Study) | Diagnostic Intelligence |
|---|---|
| Answers: "What is the market?" | Answers: "Should we do this deal?" |
| Scope: Industry and competitive landscape | Scope: This target, this price, this risk profile |
| Output: Findings | Output: Recommendation with confidence levels |
| Kill criteria: Rarely defined | Kill criteria: Explicit and pre-agreed |
| Confidence: Implicit | Confidence: Explicit for every finding |
The Shift
Stop buying information. Start buying judgment. The market report is an input, not an answer.
The Question to Ask
When was the last time your CDD provider told you not to do a deal?
Sources & Verification
| Claim | Source | Status |
|---|---|---|
| 71% of PE investments missed margin projections (65-deal study) | Bain & Company Press Release (Oct 2019) | Verified |
| Average margin miss: 330 basis points below forecast | Bain, "Integrating Due Diligence" | Verified |
| McKinsey predicted 900,000 cell subscribers vs. 109M actual | UPF Innovation Case Study | Verified |
| AT&T acquired McCaw Cellular for $12.6B to re-enter market | Multiple sources corroborated | Verified |
| "70-90% of acquisitions fail" (Clayton Christensen) | Harvard Business Review (March 2011) | Verified |
| "M&A is a mug's game" (Roger Martin) | Harvard Business Review (June 2016) | Verified |
| HBR 2020: "70-90% of acquisitions fail" | Harvard Business Review (March 2020) | Verified |
| Bain "Mastering the Merger" (2004) on 70% failure rate | HBR (May 2024) citing Bain | Verified |
| "Siloed due diligence" as root cause of margin misses | PR Newswire / Bain (Oct 2019) | Verified |
| Segway: 6,000 units vs. 10,000/week projected | McKinsey, "Beating the Odds" | Verified |
| Fortune 1984: predicted 1M mobile users by 1989 (actual: 3.5M) | American Heritage | Verified |