Beneish M-Score

What is M-Score?

A mathematical model that uses financial ratios to detect potential earnings manipulation or accounting fraud.

Think of it like this

Like a lie detector for financial statements - it flags companies whose numbers look too good to be true.

Formula

M-Score = -4.84 + 0.92×DSRI + 0.528×GMI + 0.404×AQI + 0.892×SGI + 0.115×DEPI - 0.172×SGAI + 4.679×TATA - 0.327×LVGI
  • DSRI: Days Sales in Receivables Index
  • GMI: Gross Margin Index
  • AQI: Asset Quality Index
  • TATA: Total Accruals to Total Assets

Why it matters

  • Helps identify potential fraud before it's revealed
  • Created by Professor Messod Beneish at Indiana University
  • Successfully flagged Enron before its collapse
  • Combines 8 financial statement variables

What's a good value?

< -2.22
Normal
Low probability of manipulation
-2.22 to -1.78
Gray Zone
Needs further investigation
> -1.78
Manipulator
High probability of manipulation

Real-world example

Enron had an M-Score above -1.78 for years before the fraud was discovered.

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