What it means
When a company issues stock options to employees or investors, it creates the potential for more shares to exist in the future. If everyone exercised their options at once, the existing ownership slice of current shareholders would shrink, which is known as dilution.
To measure this fairly on financial statements, accountants use the treasury stock method. This method follows a specific logic.
First, it assumes all in-the-money options are exercised, bringing fresh cash into the company. Second, it assumes the company takes that exact cash and buys back its own shares in the open market at the current average share price.
The net increase in the total share count is simply the difference between the newly issued option shares and the shares bought back. Why does this matter?
Investors need to see an accurate picture of earnings per share, especially if a company has many unexercised options or warrants. By factoring in the buybacks, the treasury stock method prevents companies from overstating how badly their ownership base might be diluted.
It is a standard rule required by accounting regulators to keep financial reporting honest and transparent. Imagine you run a bakery and hand out coupons that let friends buy future cakes at a discount.
If they redeem them, you get some cash, but you use that exact money to buy back ready-made cakes from the shelf to fulfil the order, limiting how many extra cakes you actually have to bake from scratch.
In practice
Real-world examples
Example 1
TechStart grants options for 10,000 shares at $10 each. The current market share price is $20. Under this method, the company receives $100,000 and buys back 5,000 shares, resulting in a net addition of 5,000 shares. The analyst adds those 5,000 shares to the diluted share count.
Example 2
BuildCo has warrants outstanding for 20,000 shares at $15. The market price is $30. The company collects $300,000 from the exercise and repurchases 10,000 shares from the open market, adding a net 10,000 shares. The extra shares slightly reduce earnings per share for existing owners.
Example 3
RetailCorp issues options for 50,000 shares at $5 when shares trade at $10. The $250,000 collected buys back 25,000 shares, leaving a net dilution of 25,000 shares added to the weighted average share count. The finance team shows this calculation in the notes so investors can follow it.
Think of it
Imagine you run a bakery and hand out coupons that let friends buy future cakes at a discount. If they redeem them, you get some cash, but you use that exact money to buy back ready-made cakes from the shelf to fulfill the order, limiting how many extra cakes you actually have to bake from scratch.
Formula
Calculation
Net Dilutive Shares = New Shares Issued from Options - Shares Purchased with Proceeds
Example:
1. Options exercised = 1,000 shares at $10 strike price (Proceeds = $10,000)
2. Market price = $20
3. Shares repurchased with proceeds = $10,000 / $20 = 500 shares
4. Net Dilutive Shares = 1,000 - 500 = 500 shares added to the share count.
Options that are out of the money are left out. If the strike price were $25 and the market price $20, nobody would exercise, so the net dilutive shares would be zero. The method only counts options where the market price is above the strike price.Case study
Seen in the real world
This is a fictional, illustrative scenario. BrightSoftware, a growing tech firm, wanted to measure its true share dilution for its annual financial report. The company had 100,000 stock options outstanding with an exercise price of $10 each. The average market price of BrightSoftware shares during the year was $25.
Following the treasury stock method, the finance team calculated that if all employees exercised their options, the company would receive $1,000,000 in cash. BrightSoftware would then take that $1,000,000 and buy back its own shares on the open market. At $25 per share, the company could repurchase 40,000 shares. To find the net impact on the share count, the team subtracted the 40,000 repurchased shares from the 100,000 newly issued option shares, leaving a net dilution of 60,000 shares.
This figure was then added to the weighted average number of common shares when calculating diluted earnings per share. With 1,000,000 basic shares and net income of $5,000,000, basic earnings per share were $5.00, while diluted earnings per share were $5,000,000 / 1,060,000 = $4.72. This exercise ensured that investors had a clear, realistic view of their potential ownership stake without being misled by the gross number of options granted.
Watch out
Common mistakes
- Forgetting to check if options are actually in the money before including them in the calculation.
- Using the year-end share price instead of the average market price over the reporting period.
- Failing to account for tax benefits that may alter the actual proceeds received by the company.
Questions
People also ask
What does in-the-money mean in this context?
It means the current market price of the stock is higher than the exercise price of the option, making it profitable for the holder to buy.
Does this method mean the company actually has to buy back shares?
No, it is a theoretical calculation used strictly for financial reporting to show potential dilution, not an actual corporate share buyback program.
Why is this calculation necessary for earnings per share?
It prevents companies from making their per-share profit look artificially high by ignoring the future shares that options and warrants will create.