Altman Z-Score

The Altman Z-Score is a financial formula developed by NYU professor Edward Altman in 1968 to predict the probability of a company going bankrupt within two years. It uses five financial ratios weighted and combined into a single score that classifies companies into safe, grey, and distress zones.

What Is the Altman Z-Score?

Z-Score = 1.2(X1) + 1.4(X2) + 3.3(X3) + 0.6(X4) + 1.0(X5)

Where:
– **X1** = Working Capital / Total Assets (liquidity)
– **X2** = Retained Earnings / Total Assets (accumulated profitability)
– **X3** = EBIT / Total Assets (operating efficiency)
– **X4** = Market Value of Equity / Total Liabilities (leverage)
– **X5** = Revenue / Total Assets (asset turnover)

This formula is for publicly listed manufacturing companies. Modified versions exist for private companies and non-manufacturing businesses.

Interpreting the Z-Score

| Z-Score | Interpretation |
|———|—————|
| Above 2.99 | Safe zone; low bankruptcy risk |
| 1.81 to 2.99 | Grey zone; moderate risk; monitor closely |
| Below 1.81 | Distress zone; high bankruptcy risk within 2 years |

Accuracy and Limitations

The original Altman Z-Score predicted bankruptcy with 72-80% accuracy for manufacturing companies in the original study period. However:
– It was developed on US data from the 1960s; applicability to Indian markets may vary
– Not applicable to banks and financial companies (different capital structures)
– Market cap-dependent component makes it volatile for small-cap companies
– Does not account for qualitative factors (management quality, industry disruption)

Practical Example

An analyst calculates a manufacturing company’s Z-Score at 1.6 (in the distress zone). The company has been carrying high debt, declining working capital, and falling EBIT. The Z-Score quantifies the financial stress already visible in the underlying ratios, alerting the analyst to review the company for distress risk.

Key Takeaways

– Altman Z-Score predicts bankruptcy risk using five financial ratios; below 1.81 signals high risk
– Above 2.99 is safe; 1.81-2.99 is grey zone; requires monitoring
– Most effective for publicly listed manufacturing companies; modified versions exist for other types
– A useful quantitative screening tool but should not replace fundamental analysis
– Declining Z-Scores over time are a more meaningful signal than a single data point