Altman Z-Score Flags PSU Banks Despite Low PE Ratios

Altman Z-Score Flags PSU Banks Despite Cheap Valuations In the summer of 1968, NYU professor Edward Altman published a formula designed to predict corporate bankruptcy using five accounting ratios. He built it from a sample of 66 manufacturing firms. He never intended it for banks. That caveat matters enormously right now, because eight of India's largest listed public sector banks, including [Canara Bank](/stock/CANBK), [Bank of Baroda](/stock/BANKBARODA), and [Punjab National Bank](/stock/PNB), are generating Altman Z-Scores between -0.83 and 0.37, all well below the 1.8 threshold that historically signals financial distress. The Z-Score flags are sweeping across NSE: CANBK, NSE: BANKBARODA, NSE: PNB, NSE: BANKINDIA, NSE: UCOBANK, NSE: UNIONBANK, NSE: CENTRALBK, and NSE: LICI simultaneously. For a retail investor scanning a stock screener, that cluster of red flags looks alarming. The reality is more complicated, and understanding that complexity is exactly what separates a useful signal from a misleading one. Why the Z-Score Breaks Down for Deposit-Taking Banks Altman's original model weights debt heavily against assets and earnings. For a manufacturing company, a debt-to-equity ratio above 10x is a genuine crisis signal. For a bank, it's Tuesday. Deposit-taking institutions are structurally built on borrowed money. Canara Bank's debt-to-equity sits above 10x not because management made reckless decisions, but because every savings account and fixed deposit on the bank's books counts as a liability. That's the business model, not a warning sign. Still, dismissing the Z-Score entirely would be intellectually lazy. The formula is catching something real: these institutions carry enormous balance-sheet obligations relative to their equity cushion. [Punjab National Bank](/stock/PNB) in particular has a history that warrants scrutiny. The 2018 fraud episode exposed how quickly a large liability base can amplify internal control failures. The Z-Score doesn't know ...