Many investors turn to Benjamin Graham's so-called “Graham number” to calculate the fair price of a stock. The Graham number is √(22.5 * 5 year average earnings per share * book value per share), which for ONEOK gives us a fair price of $35.37. In comparison, the stock’s market price is $65.01 per share. Therefore, ONEOK’s market price exceeds the upper bound that a prudent investor would pay for its shares by 83.8%.

The Graham number is often used in isolation, but in fact it is only one part of a check list for choosing defensive stocks that he laid out in Chapter 14 of *The Intelligent Investor*. The analysis requires us to look at the following fundamentals of ONEOK:

*Sales Revenue Should Be No Less Than $500 million*

For ONEOK, average sales revenue over the last 6 years has been $20.53 Billion, so in the context of the Graham analysis the stock has impressive sales revenue. Originally the threshold was $100 million, but since the book was published in the 1970s it's necessary to adjust the figure for inflation.

*Current Assets Should Be at Least Twice Current Liabilities*

We calculate ONEOK's current ratio by dividing its total current assets of $2.55 Billion by its total current liabilities of $3.05 Billion. Current assets refer to company assets that can be transferred into cash within one year, such as accounts receivable, inventory, and liquid financial instruments. Current liabilities, on the other hand, refer to those that will come due within one year. ONEOK’s current liabilities are actually greater than its current assets, since its current ratio is only 0.8.

*The Company’s Long-term Debt Should Not Exceed its Net Current Assets*

This means that its ratio of debt to net current assets should be 1 or less. Since ONEOK’s debt ratio is -0.8, the company has much more liabilities than current assets. We calculate ONEOK’s debt to net current assets ratio by dividing its total long term of debt of $12.7 Billion by its current assets minus total liabilities of $17.89 Billion.

*The Stock Should Have a Positive Level of Retained Earnings Over Several Years*

ONEOK had positive retained earnings from 2008 to 2022 with an average of $752.95 Million. Retained earnings are the sum of the current and previous reporting periods' net asset amounts, minus all dividend payments. It's a similar metric to free cash flow, with the difference that retained earnings are accounted for on an accrual basis.

*There Should Be a Record of Uninterrupted Dividend Payments Over the Last 20 Years*

ONEOK has offered a regular dividend since at least 2007. The company has returned an average dividend yield of 7.0% over the last five years.

*A Minimum Increase of at Least One-third in Earnings per Share (EPS) Over the Past 10 Years*

We are going to compare ONEOK's earnings per share averages from the two 'bookends' of the 16 year period for which we have data. The first bookend comprises the years 2007, 2008, and 2009, whose EPS values of $2.79, $2.95, and $2.87 average out to $2.87. Next we look at the years 2020, 2021, and 2022, whose values of $0.69, $3.35, and $3.84 average out to $2.63. The growth rate between the two averages does not meet Graham's standard since it is -8.36%.

It may be trading far above its fair value, but ONEOK actually does not have the profile of a defensive stock according to Benjamin Graham's criteria because it has:

- impressive sales revenue
- not enough current assets to cover current liabilities
- much more liabilities than current assets
- positive retained earnings from 2008 to 2022
- a solid record of dividends
- decreasing earnings per share