Warren Buffett's advice to be "greedy when others are fearful" is famous, but in practice it's hard to know which falling stocks are bargains and which are cheap for a reason. During a broad sell-off like the one Indian markets are going through in October 2026, many good businesses fall alongside weak ones. This guide gives you a simple, repeatable way to find the difference.
Undervalued vs simply cheap
A stock is undervalued when its price is below what the business is reasonably worth, based on its earnings, assets and future cash flows. A stock that has merely fallen a lot is just cheap, and some cheap stocks keep falling because the business is getting worse. These are called value traps.
Step 1: Start with quality
Filter for businesses you'd be happy to own for years:
- Consistent profits for at least 5 years
- Return on equity (ROE) above ~15% over several years
- Low debt: debt-to-equity below 0.5 for most non-financial companies
- Positive operating cash flow that roughly tracks reported profit
Step 2: Check the valuation
| Measure | What it tells you | Use it for |
|---|
| P/E (price to earnings) | How much you pay for each rupee of profit | Most profitable companies |
| P/B (price to book) | Price vs net assets | Banks, NBFCs, asset-heavy firms |
| EV/EBITDA | Value including debt vs operating profit | Comparing firms with different debt |
| Dividend yield | Cash return at today's price | Mature, cash-rich businesses |
Compare each number with the company's own 5–10 year average and with close competitors. A P/E of 20 can be cheap for one business and expensive for another.
Step 3: Ask why it fell
This is the most important step. Sort the reason into one of two buckets:
- Market-wide reasons (FPI selling, oil, interest rates): the business may be fine. These are where bargains usually come from. See why FPIs are selling.
- Company-specific problems (falling sales, lost customers, accounting questions, rising debt, promoter pledging): be very careful, as these are classic value traps.
Step 4: Look for a margin of safety
Estimate a conservative fair value, for example by applying the company's long-term average P/E to its normal earnings. Then aim to buy well below that figure, so that even if you're somewhat wrong, you don't lose much.
Step 5: Buy in parts
Prices can keep falling after you start buying. Spread purchases over weeks or months, and keep any single stock to a sensible share of your portfolio.
Red flags that signal a value trap
- Revenue falling for several quarters
- High or rising debt with weak interest cover
- Promoters pledging or selling shares
- Frequent auditor changes or qualified audit reports
- Profits that never turn into cash
- A business being disrupted by technology or regulation
Stock screeners on Indian broker apps and financial websites let you filter by P/E, ROE and debt. Always confirm numbers with the company's annual report and exchange filings.
Related: sectors to watch in a correction and is this the right time to invest?
Frequently asked questions
Is a low P/E stock always undervalued?
No. A low P/E can mean the market expects profits to fall. Check why it's low before buying.
Should beginners pick undervalued stocks themselves?
It takes time and practice. Beginners can get exposure to value investing through diversified value or index funds while they learn.
How long does it take for an undervalued stock to recover?
It can take months or years, and sometimes the gap never closes. Patience and diversification are essential.
Sources
Disclaimer: This article is for information and education only. It is not investment advice or a recommendation to buy or sell any security. Figures are taken from the sources listed and may change; check official exchange filings before investing.
