Financial ratios for stock analysis, explained simply

Ratios turn a company’s raw numbers into signals you can compare. Here are the ones that matter most, ROE, P/E, debt-to-equity, the current ratio and a few more, what each tells you, and what a healthy figure looks like.

A balance sheet is full of big numbers, and big numbers on their own tell you almost nothing. Financial ratios for stock analysis put them in context, profit against equity, debt against capital, price against earnings, so you can judge a company on its fundamentals and compare it fairly to its peers. You don’t need dozens of them. A handful, read together, paint a reliable picture. Here are the ones that earn their place, grouped by the question each one answers. If you are starting from scratch, stock analysis for beginners covers the ground before this one; and one warning up front, banks break most of these ratios, so banking stocks need their own set.

Profitability, is the business efficient?

Return on Equity (ROE)

ROE measures how much profit a company squeezes out of shareholders’ money. A steady ROE in the mid-teens or higher usually points to a quality business, one of the core signals that fundamental analysis looks for, since it reinvests well rather than burning capital. Watch the trend, not just the latest figure: an ROE that holds up over five years says more than one good year.

Net profit margin

Net margin shows how much of each rupee of sales survives as profit once every cost is paid. A company that turns ₹100 of sales into ₹15 of profit keeps ₹15 in the rupee. Rising margins often signal pricing power or tighter operations; margins quietly slipping each year is a flag worth chasing down.

Valuation, is the stock expensive?

Price-to-Earnings (P/E)

P/E compares the share price to earnings per share, what you pay for each rupee the company earns. A high P/E means the market expects strong growth; a low one may signal value, or trouble the market has already spotted. P/E only means something in context: read it against the company’s own history and its sector, never on its own.

Price-to-Book (P/B)

P/B compares the price to the company’s net assets, what would be left for shareholders if it sold everything and cleared its debts. It’s most useful for banks and asset-heavy businesses, where book value is a real anchor, and far less useful for an asset-light software firm.

Leverage, how much does it borrow?

Debt-to-Equity (D/E)

D/E compares borrowed money to the company’s own funds. Lower usually means lower risk, though plenty of industries, utilities, NBFCs, infrastructure, naturally carry more debt, so judge it against the sector. A D/E that keeps climbing year after year deserves a closer look.

Interest coverage ratio

This one shows how comfortably profits cover the interest bill. A company earning many times its interest payments has room to breathe; one barely covering them is fragile, and a low figure here is a genuine red flag, especially if rates are rising.

Liquidity, can it pay its bills?

Current ratio

The current ratio compares short-term assets to short-term liabilities, can the company cover what it owes over the next year? Above 1 means yes, with something to spare. Well below 1 can signal a cash crunch, though a very high figure isn’t automatically good either; it can mean idle cash or inventory piling up.

Growth, is it getting bigger?

Revenue and earnings growth

Measured year on year, revenue and earnings growth are the engine of long-term value. Consistency beats one spectacular year, a company growing 12% a year for a decade compounds into something far steadier than one that doubles once and stalls. Look for the steady upward line, not the single spike.

Reading ratios together

The skill isn’t in any single ratio. It’s in how they combine. A company with high ROE, low debt, healthy margins and steady growth, trading at a reasonable P/E, is the profile fundamental investors tend to look for. One weak ratio isn’t a dealbreaker; several pointing the same way usually are. The StockGenie fundamental analysis app calculates all of these for every NSE company, compares them to the sector, and flags the ones worth a second look, so you spend your time judging rather than computing.

Ratios differ by industry

Here’s the nuance most beginners skip: there’s no universal “good” value for most ratios. It depends on the industry. A software firm can sustain a high P/E because it grows fast and needs little capital; a utility on the same P/E might be badly overpriced. Retailers live and die by inventory turnover. That’s the whole reason you compare a ratio to its sector rather than some absolute rule of thumb, and why StockGenie’s AI analysis benchmarks every figure against a company’s actual peers.

Banks are the sharpest example, because they are judged against numbers the regulator sets rather than conventions the market invents. The RBI’s prudential norms classify a loan as a non-performing asset once interest or principal is overdue by more than 90 days, which is why gross and net NPA percentages, not net profit margin, are the first things analysts read on a bank. Indian banks must also hold a minimum capital adequacy ratio of 9%, plus a capital conservation buffer of 2.5%, an effective floor of 11.5% of risk-weighted assets. A bank comfortably above that floor has room to lend and absorb losses; one hugging it does not. None of these figures appear anywhere in a manufacturer’s accounts, which is exactly why banking stocks need their own checklist.

Compare like with like: the cap bands

“Compare it to its peers” is easy to say and easy to get wrong, because a ₹2 lakh crore company and a ₹2,000 crore company in the same sector are not really peers at all. India has an official answer here. SEBI’s 2017 categorisation circular fixed the definitions by rank rather than by any rupee threshold:

AMFI publishes the official list twice a year, in consultation with the exchanges, ranking every listed company on its average market capitalisation over the preceding six months. Because the bands are defined by rank, a company can move between them without its own numbers changing at all, simply because others around it grew faster.

This matters for ratios in a practical way. Smaller companies routinely show more volatile ROE and lumpier earnings growth, so a single weak quarter distorts their figures far more than it would for a large cap. Checking which band a company sits in before you judge its P/E against a “sector average” stops you from comparing a market leader to a challenger a fiftieth of its size.

Turning ratios into a quick scorecard

A practical way to use ratios is a simple mental scorecard across four areas: profitability (ROE, margins), growth (revenue and earnings trends), safety (debt, interest cover, liquidity) and valuation (P/E, P/B versus peers). A company that holds up on the first three and isn’t wildly expensive on the fourth is the classic profile of a steady, well-run business. No single number decides it; the balance across all four tells the story. That’s essentially what the StockGenie stock score does, the same read, applied consistently every time.

Where the numbers come from, and when they arrive

Every figure behind these ratios comes from filings that listed Indian companies are legally required to publish, on a clock set by SEBI. Under Regulation 33 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, a listed company must file its results with the exchanges within 45 days of the end of each quarter, and within 60 days of the financial year end for the fourth quarter and the full year. Regulation 31 adds the shareholding pattern, including promoter holding, within 21 days of each quarter end.

Those three numbers are worth committing to memory, because they tell you how fresh your ratios actually are. A P/E you calculate in mid-July is still running on March quarter earnings if the June results have not landed yet. Companies that miss these deadlines must publicly disclose the reason within one working day, which is itself a signal worth noticing.

Working the ratios out by hand is one of the steps in a full fundamental-analysis workflow, reading those filings and doing the maths the same way across every company and quarter, accurate, but slow and easy to fumble. An analysis app takes that friction off your plate: StockGenie pulls the data for NSE-listed companies, calculates every ratio identically each time, and presents it in plain language, so your attention goes to interpretation, not arithmetic. The numbers inform your view; the decision stays yours, and for anything you actually invest in, it’s worth checking with a SEBI-registered adviser first.

StockGenie provides analysis and education only, not investment advice. Always consult a SEBI-registered adviser before investing.