Earnings per share: the number that moves markets
One number carries a company's entire profit, and moves stocks more than almost any other on earnings day.
Earnings Per Share
The lesson in plain words
The same lesson as the slides above, written out in full.
1. Earnings Per Share
Welcome. Earnings per share takes a company's entire profit and boils it down to a single number. How much did the business earn for each share of stock outstanding? It sounds humble, but it is arguably the most market moving data point in all of investing. Earnings reports, built around this one figure, cause more single day stock moves than almost any other event on the calendar. One note before we begin. This is financial education only, not financial advice.
- EPS boils a company's entire profit down to a single number per share.
- It is arguably the most market-moving figure in investing.
- Earnings reports cause more single-day moves than almost any other event.
A quick note: This is financial education only, not financial advice. Do not buy, sell, or hold anything based on this lesson.
2. Profit Per Share
The formula is straightforward. Earnings per share is net income divided by the weighted average number of shares outstanding. So a company that earned a billion dollars in profit, with five hundred million shares, has an EPS of two dollars. That is the slice of profit sitting behind each single share you own. It is a simple calculation, but this one number carries an enormous amount of weight, because it is what analysts forecast and what the market reacts to.
- EPS is net income divided by the shares outstanding.
- A firm earning $1bn with 500m shares has an EPS of $2.00.
- It is the slice of profit that sits behind each single share.
- Simple, but it carries an enormous amount of weight.
3. Always Use Diluted
There are two versions, and the difference matters. Basic EPS uses the current number of shares outstanding. Diluted EPS accounts for everything that could become a share, things like stock options, convertible bonds, and warrants. Diluted EPS is always lower, or equal, because it assumes more shares will exist. Always use the diluted figure for analysis. Companies love to issue stock options to executives, and ignoring that potential dilution overstates how much of the profit each shareholder really owns. If basic EPS is rising but diluted EPS is flat, that is a quiet warning worth heeding.
- Basic EPS uses the current number of shares.
- Diluted EPS also counts options, convertibles and warrants that could become shares.
- Diluted is always lower or equal, and it is the figure to analyse.
- Rising basic but flat diluted EPS is a quiet warning about dilution.
4. Beat or Miss the Estimate
Here is the part that surprises beginners. On earnings day, the market does not react to the absolute number, it reacts to EPS relative to expectations. A company earning two dollars when analysts expected one dollar eighty will likely rally. The very same two dollars, when analysts expected two dollars twenty, will likely fall. And one important caution. EPS can be flattered. Share buybacks reduce the number of shares, which lifts EPS even if actual profits are flat. That is why experienced investors read EPS alongside free cash flow. If earnings are growing but cash is not, the growth may not be real. Cash does not lie, and accounting earnings sometimes do.
- On earnings day, the market reacts to EPS relative to analyst expectations, not the raw number.
- A company earning $2.00 when analysts expected $1.80 will likely rally.
- The same $2.00 against a $2.20 expectation will likely fall.
- Beware the flatter: buybacks shrink the share count and lift EPS even when profit is flat, so read it beside free cash flow.
EPS, profit and the P/E ratio
Earnings per share (EPS) is a company's net profit divided by the number of its shares. The net profit comes from the bottom line of the income statement (see The income statement).
EPS is not the same as profit. Profit is the total in dollars. EPS is that total split across every share, so it changes when the share count changes even if profit does not. That is how buybacks can lift EPS while the business stands still.
There is no single 'good' EPS. A company with few shares can show a high EPS and a company with many shares a low one, for the same profit. Comparing raw EPS between two companies tells you little. What matters is the trend in one company's diluted EPS over time, and how each report compares with what analysts expected.
EPS is the 'E' in the P/E ratio: the share price divided by EPS. It tells you how much the market pays for each dollar of yearly profit (see The P/E ratio). Price times shares gives the company's total market value (see Market capitalization).
You will meet a few labels. Trailing EPS uses the last twelve months of reported profit. Forward EPS uses analysts' estimates for the next twelve. Adjusted EPS leaves out items the company calls one-off, so check what was left out and why.
Another profit measure, before interest, tax and non-cash costs: EBITDA.
Quick answers
What is earnings per share (EPS)?
Earnings per share takes a company's entire profit and boils it down to one number: how much the business earned for each share outstanding. It is what analysts forecast and what the market reacts to on earnings day, which makes it one of the most market-moving figures in investing.
How is EPS calculated?
EPS is net income divided by the weighted average number of shares outstanding. A company that earned $1bn in profit with 500m shares has an EPS of $2.00. That is the slice of profit sitting behind each single share.
What is the difference between basic and diluted EPS?
Basic EPS uses the current number of shares. Diluted EPS also counts stock options, convertible bonds and warrants that could become shares, so it is always lower or equal. Use the diluted figure for analysis. If basic EPS is rising but diluted EPS is flat, that is a quiet warning about dilution.
Why does a stock fall when EPS goes up?
On earnings day the market reacts to EPS against analyst expectations, not the raw number. A company earning $2.00 when analysts expected $1.80 will likely rally. The same $2.00 against a $2.20 expectation will likely fall.
Is EPS the same as profit?
No. Profit is the total in dollars, and EPS is that total split across every share. Buybacks shrink the share count and lift EPS even when profit is flat, so read EPS beside free cash flow. If earnings are growing but cash is not, the growth may not be real.
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