Glossary · Investing Basics
P/E Ratio
One of the most widely used valuation metrics. Calculated by dividing the current share price by earnings per share. A high P/E may suggest the market expects strong future growth; a low P/E may indicate undervaluation or declining prospects.
01—What is P/E Ratio?
The definition — and what it means in practice.
The P/E Ratio (price-to-earnings ratio) is a common valuation metric that compares a company’s share price to its earnings per share (EPS). It is calculated by dividing the current market price of one share by the EPS figure (usually based on the latest reported profits). A higher P/E can mean investors expect faster future growth, while a lower P/E can point to weaker expectations or potential undervaluation.
For an investor, P/E helps put a share price into context: paying Rs 200 for a company earning Rs 20 per share is different from paying Rs 200 for Rs 5 of earnings. P/E is most useful when comparing similar companies in the same sector, or comparing a company to its own historical range. It is less meaningful for loss-making firms or where profits are unusually volatile.
If a share is Rs 200 and EPS is Rs 20, the P/E Ratio is 10 (you are paying Rs 10 for each Re 1 of annual earnings).
P/E Ratio = Share Price ÷ Earnings per Share (EPS)
Use the current share price and the EPS figure from the company’s reported results (often the latest annual or trailing earnings).
- P/E measures how much the market is paying for each Re 1 of a company’s earnings.
- High P/E can reflect growth expectations; low P/E can reflect weaker prospects or undervaluation.
- Compare P/E mainly within the same sector; business models and risk differ across sectors.
- P/E is unreliable for companies with losses or one-off profits that distort earnings.
- Always check what EPS period is used (latest annual, trailing, or another basis).
02—How p/e ratio works on the PSX
The Pakistan-specific rules, conventions, and numbers.
On the Pakistan Stock Exchange (PSX), investors commonly use P/E when screening shares and comparing valuations across sectors. Because P/E depends on earnings per share taken from reported financial results, it often changes after companies release audited annual accounts and other earnings announcements. A price move can change the P/E immediately, while the “E” typically updates when new results are published.
P/E is also used when looking at groups of stocks such as index constituents. For example, investors may compare the valuation of companies in major benchmarks like the KSE-100 or KSE-30 using P/E alongside other measures. Since most PSX shares have a Rs 10 face value (used for dividend percentage declarations), it is important not to confuse dividend conventions with EPS or the earnings used in P/E calculations.
03—Common misconceptions
Where investors most often get this wrong.
A low P/E always means the stock is cheap.
A low P/E can also reflect falling earnings expectations, higher risk, or poor business prospects. It is a starting point, not a conclusion.
A high P/E means a stock is overpriced.
A high P/E may be justified if the market expects stronger future growth or more stable earnings. It can also be inflated if current earnings are temporarily low.
You can use P/E even when a company is loss-making.
If earnings per share are negative, the P/E becomes negative or not meaningful. Other metrics are typically used for such companies.
04—Using p/e ratio on BSL
Where this term shows up across the platform — with live data.
- Find low valuation names using the Lowest P/E list.
- Filter shares by sector and view valuation fields in the Stock Screener.
- Check a company’s latest reported earnings on its page in Stocks.
- Compare large-cap benchmarks via the KSE-100 index page.
05—Frequently asked questions
What investors ask about p/e ratio on the PSX.
Frequently Asked Questions
P/E is calculated as the current share price divided by earnings per share (EPS). The price can change throughout trading, while EPS usually updates when new results are reported, so P/E can move for either reason.
A negative P/E typically happens when a company has negative earnings (a loss), meaning the ratio is not a useful valuation measure. Investors usually look at other indicators until earnings turn positive.
It can be misleading across sectors because earnings stability, growth profiles, and risk differ widely. P/E is generally most informative when comparing companies within the same sector and with similar business models.
A cash dividend does not directly change earnings per share. However, the share price may adjust around dividend dates, which can change the P/E through the price component even if earnings stay the same.
You can use PSX-focused market lists and screeners that rank shares by P/E, then review each company’s earnings and disclosures to understand why the P/E is low or high.
06—Related terms
Keep building the picture.
A company's net profit divided by the number of outstanding shares. One of the most widely used metrics for assessing a company's profitability and comparing it across periods.
The process of determining the current worth of a security or company. Common valuation methods include discounted cash flow analysis, P/E ratio comparison, and price-to-book analysis.
A valuation metric comparing a stock's market price to its book value per share. A P/B below 1 can indicate undervaluation, though context and sector norms matter significantly.
Annual dividend per share divided by the current share price, expressed as a percentage. A useful metric for income-focused investors is to compare dividend yields across different stocks.
A method of evaluating a security by examining the underlying business, including financial statements, earnings, revenue, growth prospects, management quality, and economic conditions. Used to determine intrinsic value.
The total market value of a company's outstanding shares, calculated by multiplying the share price by the number of shares in circulation and used to classify companies as large-cap, mid-cap, or small-cap.
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