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Financial ratios compare specific data points from a company’s balance sheet to capture aspects of that company’s performance. For example, the price-to-earnings (P/E) ratio compares the price per share to the company’s earnings per share as a way of assessing whether the company is overvalued or undervalued.

Other ratios may be used to evaluate other aspects of a company’s financial health: its debt, efficiency, profitability, liquidity, and more.

The use of financial ratios is often used in quantitative or fundamental analysis, though they can also be used for technical analysis. For example, a value investor may use certain types of financial ratios to indicate whether the market has undervalued a company or how much potential its stock has for long-term price appreciation.

Meanwhile, a trend trader may check key financial ratios to determine if a current pricing trend is likely to hold.

With either strategy, informed investors must understand the different kinds of commonly used financial ratios, and how to interpret them.

What Are Financial Ratios?

A financial ratio is a means of expressing the relationship between two pieces of numerical data, which then provides a measurable insight. When discussing ratios in a business or investment setting, you’re typically talking about information that’s included in a company’s financial statements.

Financial ratios can provide insight into a company, in terms of things like valuation, revenues, and profitability. Various ratios can also aid in comparing two companies.

For example, say you’re considering investing in the tech sector, and you are evaluating two potential companies. One has a share price of $10 while the other has a share price of $55. Basing your decision solely on price alone could be a mistake if you don’t understand what’s driving share prices or how the market values each company.

That’s where financial ratios become useful for understanding the bigger picture of a company’s health and performance. In this example, knowing the P/E ratio of each company — again, which compares the price-per-share to the company’s earnings-per-share (EPS) — can give an investor a sense of each company’s market value versus its current profitability.

Recommended: How to Read Financial Statements

21 Key Financial Ratios

Investors tend to use some financial ratios more often or place more significance on certain ratios when evaluating business or companies, whether investing online or through a brokerage.

Bear in mind that most financial ratios are hard to interpret alone; most have to be taken in context — either in light of other financial data, other companies’ performance, or industry benchmarks.

Here are some of the most important financial ratios to know when buying stocks.

1. Earnings Per Share (EPS)

Earnings per share or EPS measures earnings and profitability. This metric can tell you how likely a company is to generate profits for its investors. A higher EPS typically indicates better profitability, though this rule works best when making apples-to-apples comparisons for companies within the same industry.

EPS Formula:

EPS = Net profit / Number of common shares

To find net profit, you’d subtract total expenses from total revenue. (Investors might also refer to net profit as net income.)

EPS Example:

So, assume a company has a net profit of $2 million, with 12,000,000 shares outstanding. Following the EPS formula, the earnings per share works out to $0.166.

2. Price-to-Earnings (P/E)

Price-to-earnings ratio or P/E, as noted above, helps investors determine whether a company’s stock price is low or high compared to other companies, or to its own past performance. More specifically, the price-to-earnings ratio can give you a sense of how expensive a stock is relative to its competitors, or how the stock’s price is trending over time.

P/E Formula:

P/E = Current stock price / Current earnings per share

P/E Example:

Here’s how it works: A company’s stock is trading at $50 per share. Its EPS for the past 12 months averaged $5. The price-to-earnings ratio works out to 10 — which means investors are willing to pay $10 for every one dollar of earnings. In order to know whether the company’s P/E is high (potentially overvalued) or low (potentially undervalued), the investors typically compare the current P/E ratio to previous ratios, as well as to other companies in the industry.

3. Debt to Equity (D/E)

Debt to equity or D/E is a leverage ratio. This ratio tells investors how much debt a company has in relation to how much equity it holds.

D/E Formula:

D/E = Total liabilities / Shareholders equity

In this formula, liabilities represent money the company owes. Equity represents assets minus liabilities or the company’s book value.

D/E Example:

Say a company has $5 million in debt and $10 million in shareholder equity. Its debt-to-equity ratio would be 0.5. As a general rule, a lower debt to equity ratio is better as it means the company has fewer debt obligations.

4. Return on Equity (ROE)

Return on equity or ROE is another financial ratio that’s used to measure profitability. In simple terms, it’s used to illustrate the return on shareholder equity based on how a company spends its money.

ROE Formula:

ROE = Net income – Preferred dividends / Value of average common equity

ROE Example:

Assume a company has net income of $2 million and pays out preferred dividends of $200,000. The total value of common equity is $10 million. Using the formula, return on equity would equal 0.18 or 18%. A higher ROE means the company generates more profits.

Liquidity Ratios

Liquidity ratios can give you an idea of how easily a company can pay its debts and other liabilities. In other words, liquidity ratios indicate cash flow strength. That can be especially important when considering newer companies, which may face more significant cash flow challenges compared to established companies.

5. Current Ratio

Also known as the working-capital ratio, the current ratio tells you how likely a company is able to meet its financial obligations for the next 12 months. You might check this ratio if you’re interested in whether a company has enough assets to pay off short-term liabilities.

Formula:

Current Ratio = Current Assets / Current Liabilities

Example:

Say a company has $1 million in current assets and $500,000 in current liabilities. It has a current ratio of 2, meaning for every $1 a company has in current liabilities it has $2 in current assets. Generally speaking, a ratio between 1.5 and 2 indicates the company can manage its debts; above 2 a company has strong positive cashflow.

6. Quick Ratio

The quick ratio, also called the acid-test ratio, measures liquidity based on assets and liabilities. But it deducts the value of inventory from these calculations.

Formula:

Quick Ratio = Current Assets – Inventory / Current Liabilities

Example:

Quick ratio is also useful for determining how easily a company can pay its debts. For example, say a company has current assets of $5 million, inventory of $1 million and current liabilities of $500,000. Its quick ratio would be 8, so for every $1 in liabilities the company has $8 in assets.

7. Cash Ratio

A cash ratio tells you how much cash a company has on hand, relative to its total liabilities, and it’s considered a more conservative measure of liquidity than, say, the current or quick ratios. Essentially, it tells you the portion of liabilities the company could pay immediately with cash alone.

Formula:

Cash Ratio = (Cash + Cash Equivalents) / Total Current Liabilities

Example:

A company that has $100,000 in cash and $500,000 in current liabilities would have a cash ratio of 0.2. That means it has enough cash on hand to pay 20% of its current liabilities.

8. Operating Cash Flow Ratio

Operating cash flow can tell you how much cash flow a business generates in a given time frame. This financial ratio is useful for determining how much cash a business has on hand at any given time that it can use to pay off its liabilities.

To calculate the operating cash flow ratio you’ll first need to determine its operating cash flow:

Operating Cash Flow = Net Income + Changes in Assets & Liabilities + Non-cash Expenses – Increase in Working Capital

Then, you calculate the cash flow ratio using this formula:

Formula:

Operating Cash Flow Ratio = Operating Cash Flow / Current Liabilities

Example:

For example, if a company has an operating cash flow of $1 million and current liabilities of $250,000, you could calculate that it has an operating cash flow ratio of 4, which means it has $4 in operating cash flow for every $1 of liabilities, in that time frame.

Solvency Ratios

Solvency ratios are financial ratios used to measure a company’s ability to pay its debts over the long term. As an investor, you might be interested in solvency ratios if you think a company may have too much debt or be a potential candidate for a bankruptcy filing. Solvency ratios can also be referred to as leverage ratios.

Debt to equity (D/E), noted above, is a key financial ratio used to measure solvency, though there are other leverage ratios that are helpful as well.

9. Debt Ratio

A company’s debt ratio measures the relationship between its debts and its assets. For instance, you might use a debt ratio to gauge whether a company could pay off its debts with the assets it has currently.

Formula:

Debt Ratio = Total Liabilities / Total Assets

Example:

The lower this number is the better, in terms of risk. A lower debt ratio means a company has less relative debt. So a company that has $25,000 in debt and $100,000 in assets, for example, would have a debt ratio of 0.25. Investors typically consider anything below 0.5 a lower risk.

10. Equity Ratio

Equity ratio is a measure of solvency based on assets and total equity. This ratio can tell you how much of the company is owned by investors and how much of it is leveraged by debt. An equity ratio above 50% can indicate that a company relies primarily on its own capital, and isn’t overleveraged.

Formula:

Equity Ratio = Total Equity / Total Assets

Example:

Investors typically favor a higher equity ratio, as it means the company’s shareholders are more heavily invested and the business isn’t bogged down by debt. So, for example, a company with $800,000 in total equity and $1.1 million in total assets has an equity ratio of 0.70 or 70%. This tells you shareholders own 70% of the company.

Profitability Ratios

Profitability ratios gauge a company’s ability to generate income from sales, balance sheet assets, operations and shareholder’s equity. In other words, how likely is the company to be able to turn a profit?

Return on equity (ROE), noted above, is one profitability ratio investors can use. You can also try these financial ratios for estimating profitability.

11. Gross Margin Ratio

Gross margin ratio compares a company’s gross margin to its net sales. This tells you how much profit a company makes from selling its goods and services after the cost of goods sold is factored in — an important consideration for investors.

Formula:

Gross Margin Ratio = Gross Margin / Net Sales

Example

A company that has a gross margin of $250,000 and $1 million in net sales has a gross margin ratio of 25%. Meanwhile, a company with a $250,000 gross margin and $2 million in net sales has a gross margin ratio of 12.5% and realizes a smaller profit percentage per sale.

12. Operating-Margin Ratio

Operating-margin ratio, sometimes called return on sales (ROS), measures how much total revenue is composed of operating income, or how much revenue a company has after its operating costs. It’s a measure of how efficiently a company generates its revenue and how much of that it turns into profit.

Formula:

Operating Margin Ratio = Operating Income / Net Sales

Example:

A higher operating-margin ratio suggests a more financially stable company with enough operating income to cover its operating costs. For example, if operating income is $250,000 and net sales are $500,000, that means 50 cents per dollar of sales goes toward variable costs.

13. Return on Assets Ratio

Return on assets, or ROA, measures net income produced by a company’s total assets. This lets you see how efficiently a company is using its assets to generate income.

Formula:

Return on Assets = Net Income / Average Total Assets

Example:

Investors typically favor a higher ratio as it shows that the company may be better at using its assets to generate income. For example, a company that has $10 million in net income and $2 million in average total assets generates $5 in income per $1 of assets.

Efficiency Ratios

Efficiency ratios or financial activity ratios give you a sense of how thoroughly a company is using the assets and resources it has on hand. In other words, they can tell you if a company is using its assets efficiently or not.

14. Asset Turnover Ratio

Asset turnover ratio measures how efficient a company’s operations are, as it is a way to see how much sales a company can generate from its assets.

Formula:

Asset Turnover Ratio = Net Sales / Average Total Assets

A higher asset turnover ratio is typically better, as it indicates greater efficiency in terms of how assets are being used to produce sales.

Example:

Say a company has $500,000 in net sales and $50,000 in average total assets. Their asset turnover ratio is 10, meaning every dollar in assets generates $10 in sales.

15. Inventory Turnover Ratio

Inventory turnover ratio illustrates how often a company turns over its inventory. Specifically, how many times a company sells and replaces its inventory in a given time frame.

Formula:

Inventory Turnover Ratio = Cost of Goods Sold / Average Inventory

Example:

Investors use average inventory since a company’s inventory can increase or decrease throughout the year as demand ebbs and flows. As an example, if a company has a cost of goods sold equal to $1 million and average inventory of $500,000, its inventory turnover ratio is 2. That means it turns over inventory twice a year.

16. Receivables Turnover Ratio

Receivables turnover ratio measures how well companies manage their accounts receivable, and collect money from customers. Specifically, it considers how long it takes companies to collect on outstanding receivables, and convert credit into cash.

Formula:

Receivables Turnover Ratio = Net Annual Credit Sales / Average Accounts Receivable

Example:

If a company has $100,000 in net annual credit sales, for example, and $15,000 in average accounts receivable its receivables turnover ratio is 6.67. This means that the company collects and converts its credit sales to cash about 6.67 times per year. The higher the number is, the better, since it indicates the business is more efficient at getting customers to pay up.

Coverage Ratios

Coverage ratios are financial ratios that measure how well a company manages its obligations to suppliers, creditors, and anyone else to whom it owes money. Lenders may use coverage ratios to determine a business’s ability to pay back the money it borrows.

17. Debt-Service Coverage Ratio

Debt-service coverage reflects whether a company can pay all of its debts, including interest and principal, at any given time. This ratio can offer creditors insight into a company’s cash flow and debt situation.

Formula:

Debt-Service Coverage Ratio = Operating Income / Total Debt Service Costs

Example:

A ratio above 1 means the company has more than enough money to meet its debt servicing needs. A ratio equal to 1 means its operating income and debt service costs are the same. A ratio below 1 indicates that the company doesn’t have enough operating income to meet its debt service costs.

18. Interest-Coverage Ratio

Interest-coverage ratio is a financial ratio that can tell you whether a company is able to pay interest on its debt obligations on time. This is sometimes called the times interest earned (TIE) ratio. Its chief use is to help determine whether the company is creditworthy.

Formula:

Interest Coverage Ratio = EBIT ( Earnings Before Interest and Taxes) / Annual Interest Expense

Example:

Let’s say a company has an EBIT of $100,000. Meanwhile, annual interest expense is $25,000. That results in an interest coverage ratio of 4, which means the company has four times more earnings than interest payments.

19. Asset-Coverage Ratio

Asset-coverage ratio measures risk by determining how much of a company’s assets would need to be sold to cover its debts. This can give you an idea of a company’s financial stability overall.

Formula:

Asset Coverage Ratio = (Total Assets – Intangible Assets) – (Current Liabilities – Short-term Debt) / Total Debt

You can find all of this information on a company’s balance sheet. The rules for interpreting asset coverage ratio are similar to the ones for debt service coverage ratio.

So a ratio of 1 or higher would suggest the company has sufficient assets to cover its debts. A ratio of 1 would suggest that assets and liabilities are equal. A ratio below 1 means the company doesn’t have enough assets to cover its debts.

Recommended: What Is a Fixed Charge Coverage Ratio?

Market-Prospect Ratios

Market-prospect ratios make it easier to compare the stock price of a publicly traded company with other financial ratios. These ratios can help analyze trends in stock price movements over time. Earnings per share and price-to-earnings are two examples of market prospect ratios, discussed above. Investors can also look to dividend payout ratios and dividend yield to judge market prospects.

20. Dividend Payout Ratio

Dividend payout ratio can tell you how much of a company’s net income it pays out to investors as dividends during a specific time period. It’s the balance between the profits passed on to shareholders as dividends and the profits the company keeps.

Formula:

Dividend Payout Ratio = Total Dividends / Net Income

Example:

A company that pays out $1 million in total dividends and has a net income of $5 million has a dividend payout ratio of 0.2. That means 20% of net income goes to shareholders.

21. Dividend Yield

Dividend yield is a financial ratio that tracks how much cash dividends are paid out to common stock shareholders, relative to the market value per share. Investors use this metric to determine how much an investment generates in dividends.

Formula:

Dividend Yield = Cash Dividends Per Share / Market Value Per Share

Example:

For example, a company that pays out $5 in cash dividends per share for shares valued at $50 each are offering investors a dividend yield of 10%. This can be compared to the dividend yield of another company when choosing between investments.

Ratio Analysis: What Do Financial Ratios Tell You?

Financial statement ratios can be helpful when analyzing stocks. The various formulas included on this financial ratios list offer insight into a company’s profitability, cash flow, debts and assets, all of which can help you form a more complete picture of its overall health. That’s important if you tend to lean toward a fundamental analysis approach for choosing stocks.

Using financial ratios can also give you an idea of how much risk you might be taking on with a particular company, based on how well it manages its financial obligations. You can use these ratios to select companies that align with your risk tolerance and desired return profile.

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The Takeaway

Learning the basics of key financial ratios can be helpful when constructing a stock portfolio. Rather than focusing only on a stock’s price, you can use financial ratios to take a closer look under the hood of a company, to gauge its operating efficiency, level of debt, and profitability.

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FAQ

Which ratios should you check before investing?

Many investors start with basics like the price-to-earnings (P/E) ratio, the debt-to-equity (D/E) ratio, and the working capital ratio. But different ratios can provide specific insights that may be more relevant to a certain company or industry, e.g., knowing the operating-margin ratio or the inventory-turnover ratio may be more useful in some cases versus others.

What is the best ratio when buying a stock?

There is no “best” ratio to use when buying a stock, because each financial ratio can reveal an important aspect of a company’s performance. Investors may want to consider using a combination of financial ratios in order to make favorable investment decisions.

What is a good P/E ratio?

In general, a lower P/E ratio may be more desirable than a higher P/E ratio, simply because a higher P/E may indicate that investors are paying more for every dollar of earnings — and the stock may be overvalued.

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