Quality stocks are companies that earn high returns on equity, keep wide and stable margins, and carry little debt relative to what they earn, and as of August 4, 2026 the test is passed most clearly by Microsoft (MSFT), Nvidia (NVDA), Apple (AAPL) and Alphabet (GOOGL), with Coca-Cola (KO) passing on returns and margins but carrying more leverage [1]. Microsoft earned a 46.8 percent operating margin and a 30 percent return on equity over the last four reported quarters with debt of about $40 billion against $78 billion of cash, while ExxonMobil (XOM), used here as the contrast, earned a 9 percent operating margin and a 9.7 percent return on equity [1] [2]. This article sets out the three tests and applies them with current filings.
What makes a quality stock: the three tests
Return on equity (ROE) is net income divided by shareholders' equity. It measures how much profit the business earns on the capital its owners have left in it. Sustained ROE above 15 to 20 percent usually indicates a durable advantage, though buybacks that shrink equity can inflate the figure. Operating margin is operating income divided by revenue and shows pricing power and cost control before interest and taxes. The debt test compares total borrowings with equity and with cash; low debt means earnings belong to shareholders rather than lenders and the company can invest through a downturn.
All three should be read together. A high ROE produced by leverage is fragile, and a high margin on shrinking revenue is a business in decline. The figures below use trailing twelve-month (TTM) results from the latest four quarters reported to the SEC, with ROE calculated on end-of-period equity, and they can be reproduced for any ticker in the DataPorium stock screener [1].
Who passes the quality test now: ROE, margins and debt as of August 4, 2026
| Company (latest quarter) | TTM revenue | TTM operating margin | TTM net margin | ROE | Total debt | Cash and securities | Debt to equity |
|---|---|---|---|---|---|---|---|
| Microsoft (Mar 31, 2026) | $318.3B | 46.8% | 39.3% | 30.2% | $40.3B | $78.3B | 0.10 |
| Nvidia (Apr 26, 2026) | $253.5B | 65.6% (latest quarter) | 63.0% | 81.7% | $8.5B | $50.3B | 0.04 |
| Apple (Jun 27, 2026) | $466.8B | 33.2% | 27.6% | 120% | $82.3B | $146.5B | 0.77 |
| Alphabet (Jun 30, 2026) | $445.9B | 33.1% | 54.8% (inflated by gains) | 38.1% | $98.2B | $242.5B | 0.15 |
| Coca-Cola (Jul 3, 2026) | $50.1B | 31.7% | 28.6% | 39.6% | $43.5B | $13.5B | 1.20 |
| ExxonMobil (Mar 31, 2026) | $326.0B | 9.0% | 7.8% | 9.7% | n/a | $8.4B | n/a |
Sources: DataPorium quarterly statements and price history for TTM sums and ExxonMobil, and the companies' 10-Q filings for the latest quarter, debt, cash and equity [1] [2] [3] [4] [5] [6].
Microsoft and Nvidia: the cleanest passes
Microsoft's four quarters to March 31, 2026 produced $318.3 billion of revenue and $125.2 billion of net income, with quarterly operating margins between 44.9 and 48.9 percent [1]. Its 10-Q shows $78,272 million of cash, cash equivalents and short-term investments against $31,423 million of long-term debt and $8,839 million of current debt, and equity of $414,367 million [2]. ROE of 30 percent with a debt-to-equity ratio of 0.10 is the textbook profile.
Nvidia's quarter ended April 26, 2026 reported revenue of $81,615 million, operating income of $53,536 million and net income of $58,321 million, a gross margin of 74.9 percent, equity of $195,474 million and a net carrying amount of debt of $8,470 million against $13,237 million of cash and $37,098 million of marketable debt securities [4]. Four quarters of net income of about $159.6 billion on that equity base gives an ROE above 80 percent [1] [4]. The risk is not the balance sheet but the durability of a 66 percent operating margin.
Apple, Alphabet and Coca-Cola: passes with footnotes
Apple's ROE of about 120 percent is real but engineered. Its quarter ended June 27, 2026 shows net income of $29,789 million and shareholders' equity of only $107,520 million because years of buybacks, including 79,611 thousand shares for about $23.6 billion in that quarter alone, have shrunk the equity base [3]. Term debt of $82,347 million sits against $146,517 million of cash and marketable securities, so the balance sheet is a net cash position and the 0.77 debt-to-equity ratio overstates risk [3]. Operating margin of 33 percent on $466.8 billion of revenue is the better quality gauge.
Alphabet passes on margin and leverage but its net margin and ROE are inflated. The quarter ended June 30, 2026 reported operating income of $40,770 million and net income of $112,193 million, a gap explained by investment gains rather than operations; equity was $640,480 million, long-term debt $98,165 million and cash and marketable securities $242,474 million [6]. On operating income alone, Alphabet's 33 percent margin and net cash position qualify it comfortably.
Coca-Cola shows that a consumer staple can match technology margins. Four quarters to July 3, 2026 produced $50.1 billion of revenue and $14.3 billion of net income, and the latest quarter's operating income of $4,672 million covered interest expense of $369 million 12.7 times [1] [5]. But total debt of $43,543 million against equity of $36,150 million gives a debt-to-equity ratio of 1.20, so its 39.6 percent ROE is partly leverage [5]. It passes the quality test, but with the most financial risk in the group.
Why ExxonMobil does not pass, and what that shows
ExxonMobil is a well-run company, but on DataPorium's data its four quarters to March 31, 2026 produced an operating margin of 9.0 percent, a net margin of 7.8 percent and an ROE of 9.7 percent, with quarterly operating margins falling from 11.2 percent to 6.4 percent as commodity prices moved [1]. Quality, in the sense used here, means returns that do not depend on a cycle. Cyclical businesses can be excellent investments at the right price, but they are bought on valuation, not on quality. Investors may consider the distinction when a screen mixes the two groups.
Quality is high return on equity earned without leverage, and in August 2026 Microsoft and Nvidia meet that standard most cleanly while Apple, Alphabet and Coca-Cola pass with caveats about buybacks, investment gains and debt.
Key takeaways
- Microsoft: 46.8 percent operating margin, 30 percent ROE and $78 billion of cash against $40 billion of debt as of its March 2026 quarter [1] [2].
- Nvidia: 66 percent operating margin and 74.9 percent gross margin in its April 2026 quarter with $8.5 billion of debt [4].
- Apple's 120 percent ROE reflects buybacks that shrank equity to $107.5 billion; its net cash position is the better risk gauge [3].
- Alphabet's net income and ROE are inflated by investment gains; its 33 percent operating margin is the number to use [6].
- Coca-Cola passes on margins and ROE but carries a debt-to-equity ratio of 1.20; ExxonMobil's 9.7 percent ROE shows why cyclicals are valued differently [1] [5].
Frequently asked questions
What return on equity qualifies a company as a quality stock?
A sustained ROE above about 15 to 20 percent, earned with low debt, is the usual threshold. Very high figures such as Apple's 120 percent often reflect buybacks that reduce equity, so they should be read alongside margins and net cash.
Which quality metric matters most, ROE, margins or debt?
None works alone. High ROE with high debt is fragile, and high margins on falling revenue signal decline. Analysts generally require all three, high ROE, stable operating margins and modest leverage, to be met at the same time.
Are quality stocks the same as growth stocks?
No. Quality describes the return and balance sheet profile, not the growth rate. Coca-Cola grows slowly but passes the quality test, while a fast-growing company with losses and heavy debt does not.
Where can I screen for ROE, margins and debt-to-equity?
The DataPorium stock screener filters more than 38,000 tickers on return on equity, operating and net margins, debt-to-equity and cash, and links to the quarterly statements behind each figure.
Sources & References
- [1] DataPorium Stock Screener
- [2] Microsoft Corporation Form 10-Q for the quarter ended March 31, 2026 (SEC EDGAR)
- [3] Apple Inc. Form 10-Q for the quarter ended June 27, 2026 (SEC EDGAR)
- [4] NVIDIA Corporation Form 10-Q for the quarter ended April 26, 2026 (SEC EDGAR)
- [5] The Coca-Cola Company Form 10-Q for the quarter ended July 3, 2026 (SEC EDGAR)
- [6] Alphabet Inc. Form 10-Q for the quarter ended June 30, 2026 (SEC EDGAR)
