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Is Negative Price to Earnings a Bad Sign for Investors?

  •  5 min read
  •  8,248
  • Updated 23 Jul 2025

Anytime is a good time to start investing in the Indian stock market. There are several ratios to help you understand how your share market investments are faring. One such ratio is the price-to-earnings (PE) ratio. The PE ratio is a tool that compares a company’s current share price to its earnings per share. It helps investors like you gauge whether a stock is fairly valued, overvalued, or undervalued in the market.

To calculate the PE ratio, divide the price per share of a company by its earnings per share. The resulting figure tells you how much buyers are willing to pay for every rupee of earnings of the share. Generally, the lower the PE ratio, the more attractive the stock is considered from a valuation perspective, particularly if the company’s fundamentals are strong.

Example: Say, the price per share of a company is ₹150 and its yearly earnings per share is ₹30. Here, the PE ratio = ₹150/₹30 = 5. This means buyers are willing to pay up to five times the company’s earnings per share to own the stock. A PE of 5 suggests relatively low valuation, which could be seen as an opportunity, depending on the company’s growth prospects and industry conditions.

Say, a company has a negative PE ratio. This means it has been incurring losses. At first glance, you might assume that investing in such a firm is not a good idea. But this is not always the case.

A consistent decline in the PE ratio over many years may be a bad sign, especially if the company has shown no signs of profitability over an extended period. However, it is important to dig deeper. Other factors such as market trends, industry cycles, and competition can influence a firm’s short-term earnings.

Example: A pharmaceutical company may be spending heavily on developing a drug to treat a chronic health condition. This investment may lead to temporary losses, resulting in a negative PE ratio. However, if the research is successful and the drug is approved, the company could generate substantial profits in the future. These earnings would eventually reflect in a rising and positive PE ratio.

So, while the PE ratio is a useful indicator, it should not be the only metric you rely on. It’s essential to look at the bigger picture and understand what’s driving the number, mainly when it turns negative.

Let’s now take a closer look at what a negative PE ratio actually implies for investors.

A negative PE ratio means the company is not generating profit; its earnings per share (EPS) is negative. This usually indicates that the company is going through a period of losses. While this may seem like a warning sign, the reason behind the losses is what truly matters.

For some companies, a negative PE ratio could point to deeper financial trouble, poor management, or declining demand for their products or services. In such cases, the stock may be riskier and less attractive to investors.

On the other hand, start-ups or companies in high-growth sectors might report negative earnings because they are investing heavily in expansion, research, or product development. These companies may turn profitable in the future, leading to a positive PE ratio over time.

A negative PE ratio, therefore, should not be seen in isolation. It’s important to assess the company’s overall financial health, business model, and future potential before making an investment decision. Look at other indicators such as revenue growth, cash flow, and industry trends to get a clearer picture.

As mentioned earlier, a negative PE ratio signals that a company is currently not profitable, but that alone doesn’t make it a bad investment. What matters more is how the market and investors interpret the reason behind the losses.

Sometimes, a negative PE might simply reflect a temporary phase, such as a business expansion, one-time expenses, or broader industry slowdowns. In such situations, investors may still have confidence in the company’s long-term potential, and the stock may continue to attract interest.

On the flip side, a negative PE can affect investor sentiment, especially for companies with unclear growth plans or inconsistent earnings. In these cases, market participants may avoid the stock due to increased uncertainty and risk.

So, while a negative PE ratio might raise questions, it is not a standalone signal of poor performance.

There’s more than one way to calculate the P/E ratio. Depending on the type of earnings used, the ratio can offer different insights. Here are the most common types:

  • Trailing PE Ratio: This is the most widely used version. It is calculated using the company’s earnings from the past 12 months. Since it’s based on actual results, it reflects the company’s historical performance.

  • Forward PE Ratio: Also known as estimated PE, this version uses projected earnings for the upcoming 12 months. It helps investors assess whether a stock is overvalued or undervalued based on expected future performance.

  • Absolute vs Relative P/E: Absolute PE refers to the PE of a single company at a given time. Relative PE compares a company’s current PE with its past PE or with the PE of peers or the overall market.

Each type of PE ratio offers a different perspective. Understanding the difference can help you make more informed comparisons and better investment decisions.

While the PE ratio is a widely used valuation tool, it does have its drawbacks. Relying on it alone may not give you the full picture of a company’s financial health.

  • Doesn’t reflect growth potential

The PE ratio doesn’t account for how fast a company is expected to grow. A stock may seem expensive based on its current earnings, but future growth could justify the higher valuation.

  • Can be skewed by one-time events

Earnings can be affected by one-time gains or losses, which may distort the PE ratio and make it appear unusually high or low.

  • Not useful for loss-making companies

When earnings are negative, the PE ratio becomes meaningless or negative, offering little insight for comparison or decision-making.

  • Sector differences can mislead

Different industries have different average PE levels. Comparing companies across sectors without context can lead to inaccurate conclusions.

  • Ignores debt levels

The PE ratio doesn’t reflect how much debt a company carries. Two companies with the same PE may have very different financial risk profiles.

It is, therefore, essential to use the PE ratio alongside other financial metrics and qualitative factors before making investment decisions.

The PE ratio is useful for analysing the health of a company. Use it along with other analytical aids to get an overall picture of the share’s potential. If you need help with your trading decisions, open an account with Kotak Securities. You can then gain access to expert advice and have the best analytical tools at your fingertips.

Also Read:

What are bond ratings and how are they decided?
How does the share market work?

This article is for informational purposes only and does not constitute financial advice. It is not produced by the desk of the Kotak Securities Research Team, nor is it a report published by the Kotak Securities Research Team. The information presented is compiled from several secondary sources available on the internet and may change over time. Investors should conduct their own research and consult with financial professionals before making any investment decisions. Read the full disclaimer here.

Investments in securities market are subject to market risks, read all the related documents carefully before investing. Brokerage will not exceed SEBI prescribed limit. The securities are quoted as an example and not as a recommendation. SEBI Registration No-INZ000200137 Member Id NSE-08081; BSE-673; MSE-1024, MCX-56285, NCDEX-1262.

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