Key Takeaways
- Estimates dilution from in-the-money options and warrants.
- Assumes proceeds repurchase shares at market price.
- Increases shares outstanding; lowers diluted EPS.
- Used only for diluted, not basic EPS calculations.
What is Treasury Stock Method?
The Treasury Stock Method (TSM) is a calculation used to estimate the dilutive effect of in-the-money stock options and warrants on diluted earnings per share (EPS). It assumes the proceeds from exercising these options are used to repurchase shares at the current market price, thus increasing the denominator of diluted shares outstanding without changing net income.
This method is required under U.S. GAAP and provides investors a conservative view of potential dilution.
Key Characteristics
TSM applies specific assumptions to calculate dilution from stock options and warrants. Key points include:
- In-the-money focus: Only options with an exercise price below the average market price are considered.
- Proceeds reinvestment: Exercise proceeds are assumed to repurchase shares as treasury stock at market price.
- No net income adjustment: The numerator in EPS calculations remains unchanged while shares outstanding increase.
- Impact on diluted EPS: TSM increases the share count, lowering diluted EPS compared to basic EPS.
- Exclusion of out-of-the-money options: Those with exercise prices above market price are not included in dilution.
How It Works
To apply the Treasury Stock Method, first identify the number of in-the-money options and their exercise prices. Multiply the options by exercise price to find total proceeds from exercise.
Next, divide these proceeds by the average market price to estimate how many shares can be repurchased. The difference between exercised options and shares repurchased is the net new shares added to the diluted share count. This approach adjusts the denominator in EPS calculations, reflecting potential dilution without altering net income.
Examples and Use Cases
TSM is widely used in financial reporting and investment analysis to reflect dilution realistically. Consider these examples:
- Technology: Microsoft reports diluted EPS considering employee stock options using TSM to provide an accurate earnings picture.
- Consumer Electronics: Apple factors in in-the-money warrants and options when calculating EPS dilution each quarter.
- Airlines: major airlines like Delta and American Airlines adjust earnings for stock-based compensation dilution using TSM.
Important Considerations
When using the Treasury Stock Method, remember it only applies to in-the-money options, so understanding option strike prices relative to market prices is crucial. Also, TSM assumes immediate exercise at the start of the period, which may not reflect actual exercise timing.
Accurate EPS calculations using TSM help investors assess shareholder dilution risk, but you should consider other factors like convertible securities or restricted stock to get a full picture of equity dilution.
Final Words
The Treasury Stock Method offers a standardized way to estimate dilution from in-the-money options, ensuring your diluted EPS reflects potential share increases accurately. Review your company's option grants and market prices regularly to assess dilution impact and guide investment or reporting decisions.
Frequently Asked Questions
The Treasury Stock Method calculates the dilutive effect of in-the-money stock options and warrants on diluted earnings per share (EPS). It assumes that proceeds from exercising these options are used to repurchase shares at the current market price, resulting in a net increase in shares outstanding.
TSM is applied only to in-the-money options or warrants, meaning those with an exercise price below the average market price during the reporting period. Out-of-the-money options are excluded since they are unlikely to be exercised.
First, multiply the number of in-the-money options by the exercise price to get proceeds. Next, divide these proceeds by the average market price to find shares repurchased. Finally, subtract repurchased shares from the total options to find net new shares, which represent dilution.
TSM considers the potential dilution from exercising in-the-money options, increasing the number of shares outstanding. Basic EPS ignores this potential dilution, so TSM is only used when calculating diluted EPS to reflect a more conservative earnings estimate.
The formula is: Diluted Shares = Basic Shares + [Options × (1 - Exercise Price / Market Price)], applied only when the exercise price is lower than the market price, indicating in-the-money options.
When using TSM, net income remains unchanged. The method increases the number of shares outstanding (denominator) to show dilution but does not adjust net income (numerator) in the EPS calculation.
Sure! If a company has 100,000 in-the-money options at a $10 exercise price and the market price is $20, proceeds equal $1,000,000. Using proceeds to buy back shares at $20 repurchases 50,000 shares, so net new shares are 50,000, increasing diluted shares and reducing EPS.

