PE Ratio- Price to Earnings Ratio

The price-to-earnings ratio, also known as the P/E ratio, is one of the most popular valuation metrics for stocks. It indicates whether a stock is overvalued or undervalued at its current market price. In this article, let's understand what the P/E ratio is, how it is calculated, and its formula. 

Key Highlights:

• The P/E ratio compares a company's share price with its earnings per share (EPS) to assess its valuation. 
• The four main types are Trailing P/E, Forward P/E, Justified P/E, and Negative P/E. 
• A high P/E reflects strong growth expectations, while a low P/E may indicate undervaluation or slower growth 

What is the P/E Ratio?

The Price/Earnings (P/E) is calculated by dividing the Price per Share by the Earnings per Share (EPS). It shows how much an investor will pay for every ₹1 of company earnings, and it is one of the most common indicators of a stock's value.

This value helps investors understand how much money they have to spend on the security, and it is often used for comparing different stocks to see which ones are the best value buys. The P/E is frequently used with other financial ratios to evaluate a stock.

Types of Price-to-Earnings Ratios

The Price-to-Earnings (P/E) ratio is mainly classified into two types based on the earnings used in the calculation. 

• Trailing P/E (T/P/E): Based on historical earnings over the past 12 months. It’s reliable for stable companies but less effective for those with volatile earnings. 
• Forward P/E (F/P/E): Uses projected earnings for the next 12 months. It reflects future expectations but depends on the accuracy of forecasts. 
• Justified P/E: A theoretical P/E based on fundamentals like growth rate and required return. It’s used to assess whether a stock’s P/E is reasonable. 
• Negative P/E: Occurs when a company reports negative earnings. This is common for startups or firms in temporary distress but signals higher risk.

Price-to-Earnings Ratio Formula

The P/E ratio is calculated as:
P/E Ratio = Current Market Price per Share ÷ Earnings per Share (EPS) 

• Market Price per Share: The stock’s current trading price. 
• EPS: Net income divided by the number of outstanding shares, typically over the past 12 months (trailing) or forecasted (forward).

How to Calculate the Price-to-Earnings Ratio?

Investors usually like to know the underlying worth of an equity share before investing. They analyse it from various aspects such as risk, returns, cash flows, and corporate governance.

Amongst other valuation techniques, the P/E ratio is an essential tool for assessing a share's intrinsic attractiveness. Other names for the P/E Ratio include ‘earnings multiple’ and ‘price multiple’. P/E Ratio is calculated by dividing the market price of a share by the earnings per share.

P/E Ratio is calculated by dividing the market price of a share by the earnings per share. 

Example:

CMP of XYZ Ltd. is: Rs 90, 

Earnings per share: Rs 9

PE = Current Market Price / Earnings Per Share

P/E = 90 / 9 = 10

Now, XYZ Ltd.'s P/E ratio is 10, which means that investors are willing to pay Rs 10 for every rupee of the company's earnings.

What Does the PE Ratio Tell About a Stock?

The P/E ratio varies across industries and should, therefore, be compared with peers in similar business activities (of similar size) or with its historical P/E to evaluate whether a stock is undervalued or overvalued. 

Traditionally, specific sectors, such as diamonds, fertilisers, and so on, have commanded low P/E ratios. Other sectors, such as FMCG, Pharma, and IT, generally have a higher P/E. The analysis of high and low P/E is as follows.

High P/E

Consider picking stocks of companies with high price-to-earnings ratios. This indicates that investors have higher expectations for future earnings growth and are willing to pay more, which is a positive sign of future performance. 

However, a disadvantage of high P/E ratios is that growth stocks are often unpredictable, which puts a lot of pressure on companies to deliver more to justify their higher valuations. Therefore, investing in growth stocks will likely be risky. 

Low P/E

Stocks of companies with a low price-to-earnings ratio are often considered undervalued. A low P/E ratio usually indicates weak current and future performance, making it a poor investment.

However, you must buy the company's shares only if the fundamentals are strong. You must buy stocks of undervalued companies with strong fundamentals to make profits over time. 

Justified P/E

The justified P/E ratio is calculated independently of the standard P/E. In other words, the two ratios should produce two different results. If the P/E is below the justified P/E ratio, it indicates the company is undervalued, and purchasing the stock may yield profits over time.

Negative P/E

You may find a company that is losing money or has negative earnings and a negative P/E ratio. For instance, established companies may experience periods of negative cash flow due to factors beyond their control. However, you must not invest in companies with consistent negative P/E ratios as they may go bankrupt. 

How to Analyse the P/E Ratio?

A P/E ratio is most meaningful when viewed in context rather than in isolation. Comparing it with industry peers, the company's historical valuation, and key financial metrics helps investors make a more informed assessment. 

• Compare with Peers: A stock’s P/E should be evaluated against competitors in the same industry. For example, tech companies often have higher P/Es (20–30) than utilities (10–15). 
• Historical P/E: Compare the current P/E to the company’s historical average to spot trends. 
• Market Context: A high P/E may be justified in a booming market, while a low P/E could signal undervaluation or distress. 
• Combine with Fundamentals: Assess alongside revenue growth, debt levels, and cash flow to avoid misinterpretation.

Absolute P/E vs Relative P/E 

Both Absolute P/E and Relative P/E help evaluate a stock's valuation, but they use different comparison methods. 

How to Find the P/E Ratio?

You can also find a company's P/E ratio on financial websites, company reports, and brokerage platforms without calculating it manually. 

• Financial Websites: You can check the P/E ratios of the listed companies in Cleartax. 
• Company Reports: Check annual or quarterly reports for EPS and calculate P/E using the current stock price. 
• Brokerage Platforms: Most trading apps display P/E ratios for stocks.

Significance of the P/E Ratio

The P/E ratio is one of the most widely used valuation metrics. It helps investors understand how the market values a company's earnings and compare stocks across similar businesses. 

• Valuation Insight: Indicates whether a stock is priced reasonably relative to earnings. 
• Growth Expectations: High P/Es reflect optimism about future growth; low P/Es may suggest undervaluation or stagnation. 
• Investment Decisions: Helps identify potential bargains or overpriced stocks when used with other metrics. 
• Payback Period: Conceptually, P/E represents the number of years required to recover the share price through earnings, assuming constant earnings.

Limitations of the P/E Ratio

While the P/E ratio is a useful valuation tool, it has several limitations that investors should keep in mind.

• Doesn't reflect future growth: A low P/E ratio does not always mean a stock is undervalued, and a high P/E ratio does not always mean it is overvalued. Growth expectations play a major role.
• Not useful for loss-making companies: Companies with negative earnings have no meaningful P/E ratio, making the metric ineffective for evaluating them.
• Accounting differences can affect EPS: Changes in accounting policies or one-time gains and losses can distort earnings, resulting in a misleading P/E ratio.
• Industry comparisons matter: P/E ratios vary widely across industries. Comparing a technology company with a bank or an FMCG company may lead to incorrect conclusions.
• Ignores debt and cash position: The P/E ratio focuses only on earnings and share price. It doesn’t consider a company's debt levels, cash reserves, or overall financial health.
• Can be influenced by market sentiment: Investor optimism or pessimism can drive stock prices higher or lower, causing the P/E ratio to change even when the company's fundamentals remain the same.
• Should not be used alone: The P/E ratio is most effective when combined with other financial metrics such as the Price-to-Book (P/B) ratio, Return on Equity (ROE), Debt-to-Equity ratio, and revenue and earnings growth.

Conclusion

Whether a P/E ratio is considered to be high or low depends on the sector. For instance, companies in the IT and telecom sector have higher P/E ratios than those in other industries, such as manufacturing and textiles. The P/E ratio is also dependent on external factors, such as a company's announced merger or acquisition, which can increase it.