What Makes a Great Long-Term U.S. Stock Investment?

Introduction: The Power of Compounding Machines

Here is a number that should stop you in your tracks: if you had invested $10,000 in Apple stock in 2003, your position would be worth over $5 million today. That is not a typo. A single, patient investment in one great American company would have turned a modest sum into generational wealth.

But here is the part most people miss. Apple was not some hidden micro-cap stock that nobody had heard of. By 2003, the iPod was already on the market. Steve Jobs was already a household name. The information was right there, sitting in plain sight. The hard part was never finding the stock. The hard part was recognizing what makes a company a compounding machine and then having the conviction to hold it for decades while the market panicked, crashed, and recovered over and over again.

Warren Buffett has spent the better part of six decades trying to answer one deceptively simple question: what makes a great long-term investment? His answer, distilled over thousands of annual meetings, shareholder letters, and billions of dollars in capital allocation decisions, comes down to a handful of qualities. Durable competitive advantages. Consistent earnings growth. High returns on invested capital. Honest and capable management. And a price that does not require perfection to work out.

The goal of this article is to give you a practical, thorough framework for identifying these rare compounding machines in the U.S. stock market. We will break down each characteristic that separates a great long-term stock from a mediocre one. We will examine real companies that delivered 10x or greater returns over 20-year periods, dissecting exactly what made them special. And we will give you a quality scoring system you can apply to any stock you are considering for your own portfolio. Whether you are a seasoned investor or just getting started, this framework will change how you evaluate businesses.

Let us begin with the most important concept in long-term investing: the competitive moat.

Durable Competitive Moats: The Castle Walls That Protect Profits

Imagine a medieval castle surrounded by a deep, wide moat filled with water. Enemies can see the castle. They know the riches inside. But the moat makes it extraordinarily difficult to attack. In investing, a competitive moat serves exactly the same purpose. It is the structural advantage that prevents competitors from stealing a company’s profits, even when those profits are highly visible and extremely attractive.

Without a moat, any business earning outsized profits will eventually see those profits competed away. Rivals will copy the product, undercut the price, and flood the market until margins collapse to zero. Moats are the reason some companies can earn 25% returns on capital for 30 consecutive years while their competitors struggle to break even. There are five primary types of competitive moats, and the best long-term investments typically possess more than one.

Brand Power

A powerful brand allows a company to charge a premium price for a product that might otherwise be considered a commodity. Think about Coca-Cola. The ingredients in a can of Coke cost pennies. Any competent beverage company could replicate the recipe. Yet Coca-Cola has maintained dominant market share in carbonated beverages for over a century because the brand itself is the product. Consumers do not buy Coke because it is objectively the best-tasting cola. They buy it because the brand represents familiarity, reliability, and a specific emotional experience.

Apple is another textbook example. An iPhone costs significantly more than comparable Android devices, yet Apple captures roughly 85% of all smartphone industry profits globally. The brand creates a willingness to pay that has nothing to do with hardware specifications. Brand moats are particularly durable because they compound over time. The longer a brand has been trusted, the harder it becomes for newcomers to displace it.

Network Effects

Network effects exist when a product or service becomes more valuable as more people use it. This is perhaps the most powerful moat in modern business. Consider Visa and Mastercard. Merchants accept Visa because consumers carry Visa cards. Consumers carry Visa cards because merchants accept them. Each new participant on either side makes the network more valuable for everyone, creating a self-reinforcing cycle that is nearly impossible for a new entrant to break.

Meta’s Facebook and Instagram, Microsoft’s LinkedIn, and Alphabet’s Google Search all benefit from network effects. Google gets better search results because more people search, which generates more data, which improves the algorithm, which attracts more users. A competitor cannot just build a better search engine. They would need to simultaneously replicate billions of user interactions worth of data, which is a chicken-and-egg problem with no easy solution.

Switching Costs

Switching costs make it expensive, risky, or inconvenient for customers to change to a competitor’s product. Enterprise software companies are masters of this moat. Once a Fortune 500 company has spent two years and $50 million implementing SAP or Oracle’s ERP system, retrained thousands of employees, and integrated it into every business process, the cost of switching to a competitor is astronomical. Even if a rival offers a technically superior product at a lower price, the switching costs create an enormous barrier.

Microsoft’s Office 365 and Azure cloud services benefit from the same dynamic. Companies build their entire IT infrastructure around Microsoft’s ecosystem. Every employee knows how to use Excel and Outlook. Every internal process depends on SharePoint or Teams. The technical superiority of any individual competitor does not matter when the switching costs are measured in millions of dollars and years of disruption.

Cost Advantages

Some companies achieve such massive scale that their cost per unit drops far below what any competitor can match. Costco is the quintessential example. By purchasing in enormous bulk quantities and operating on razor-thin margins (Costco’s net margin is roughly 2.5%), the company offers prices that smaller competitors simply cannot match. Costco’s scale advantage feeds on itself: lower prices attract more members, more members mean higher volume, higher volume means better purchasing power, and better purchasing power means even lower prices.

Amazon Web Services (AWS) benefits from a similar dynamic in cloud computing. The sheer scale of AWS’s infrastructure allows Amazon to offer computing resources at prices that smaller cloud providers cannot profitably match. This cost advantage has helped AWS maintain roughly 31% market share in cloud infrastructure despite aggressive competition from Microsoft and Google.

Intellectual Property and Regulatory Moats

Patents, trade secrets, regulatory licenses, and government approvals can create moats that are literally illegal for competitors to cross. Pharmaceutical companies like Eli Lilly and Novo Nordisk benefit from patent protection on blockbuster drugs. The FDA approval process itself serves as a moat: even after patents expire, the time, cost, and regulatory complexity of bringing a generic or biosimilar to market provides years of additional protection.

In financial services, regulatory requirements create enormous barriers to entry. Starting a new bank or insurance company requires not just capital, but years of regulatory approval, compliance infrastructure, and relationship-building with regulators. Companies like JPMorgan Chase and Berkshire Hathaway benefit from regulatory moats that make it virtually impossible for a startup to compete at their scale.

The Financial Engine: Revenue Growth, ROIC, and Free Cash Flow

A wide moat protects profits. But a great long-term investment also needs a powerful engine that generates and grows those profits year after year. Three financial metrics, taken together, tell you almost everything you need to know about the quality of a company’s economic engine: revenue growth, return on invested capital (ROIC), and free cash flow generation.

Consistent Revenue and Earnings Growth

Over the very long term, a stock’s price follows its earnings. A company that can grow earnings per share at 12-15% annually will, all else being equal, see its stock price roughly double every five to six years. Over 20 years, that compounds to a 10x or greater return before you even account for dividends.

But not all revenue growth is created equal. The market correctly distinguishes between organic growth (growth driven by selling more products, entering new markets, or raising prices) and acquisition-fueled growth (growth achieved by buying other companies, often with debt). Organic growth is generally more sustainable, more profitable, and more highly valued by the market.

Look for companies that have grown revenue at a minimum of 8-10% annually over rolling 5-year periods. Consistency matters enormously here. A company that grows at 30% for two years and then contracts for three years is far less attractive than one that grows at 12% every single year. Consistency signals a predictable, resilient business model that can perform through economic cycles.

Microsoft is a compelling case study. From 2014 to 2024, under CEO Satya Nadella, Microsoft grew revenue from approximately $87 billion to over $245 billion, a compound annual growth rate (CAGR) of roughly 11%. That might not sound explosive. But because Microsoft simultaneously expanded operating margins from about 30% to over 44%, earnings per share grew at an even faster rate. The stock went from roughly $37 to over $420 during that period, a return exceeding 1,000%.

Return on Invested Capital (ROIC)

If there is one metric that best predicts long-term stock performance, it is ROIC. Return on invested capital measures how efficiently a company converts the money invested in its business into profits. It is calculated as net operating profit after taxes (NOPAT) divided by invested capital (total equity plus net debt).

Why does ROIC matter so much? Because a company with a 25% ROIC can reinvest its profits at that same 25% rate, creating a compounding engine that accelerates over time. Think of it this way: if a company earns 25 cents of profit for every dollar invested and can reinvest those profits at the same rate, earnings growth becomes almost self-funding. The company does not need to raise external capital or take on debt to grow. It simply reinvests its own cash at high rates of return.

Academic research strongly supports this connection. A McKinsey study analyzing thousands of companies over multiple decades found that stocks with consistently high ROIC (above 15%) dramatically outperformed the market, regardless of which industry they were in. The study concluded that ROIC is the single best predictor of long-term value creation.

Strong Free Cash Flow Generation

Free cash flow (FCF) is the cash a company generates from operations after subtracting capital expenditures. It represents the actual cash available to pay dividends, buy back shares, reduce debt, or invest in growth. Earnings can be manipulated through accounting tricks. Free cash flow is much harder to fake because it represents real money flowing into the business.

A hallmark of great long-term investments is a high and growing FCF margin (free cash flow as a percentage of revenue). Companies like Visa and Mastercard convert over 50% of their revenue into free cash flow. Apple generates roughly $100 billion in annual free cash flow. Microsoft produces over $70 billion. These are businesses that print cash, and that cash gives management enormous flexibility to reward shareholders and invest in future growth.

When evaluating a company, compare its free cash flow to its reported net income. Ideally, free cash flow should consistently equal or exceed net income. If a company reports $5 billion in earnings but only $2 billion in free cash flow, the gap suggests that earnings quality is low. The company may be using aggressive accounting assumptions, or it may require heavy capital spending just to maintain its current earnings level.

Management Quality and Capital Allocation

You can have the widest moat in the world and the most powerful financial engine, but none of it matters if the people running the company are incompetent, dishonest, or misaligned with shareholders. Over a 10- to 20-year holding period, management quality often becomes the single biggest differentiator between a good stock and a great one.

Skin in the Game

The first thing to check is whether management has significant personal ownership in the company. When a CEO has $500 million of their own net worth tied up in the stock, their interests are aligned with yours. They feel the pain of a stock decline and the reward of a stock increase in exactly the same way you do. Insider ownership data is publicly available in SEC filings (look for Form 4 and proxy statements).

Some of the greatest long-term investments have been led by founder-CEOs with enormous skin in the game. Jeff Bezos built Amazon while holding a multi-billion dollar stake. Mark Zuckerberg controls Meta with a massive personal position. Jensen Huang has led NVIDIA while maintaining significant ownership. When the person making strategic decisions has their own wealth on the line, they tend to think in decades rather than quarters.

Conversely, be cautious of companies where management compensation is heavily skewed toward short-term bonuses and stock options that vest quickly. These structures incentivize executives to maximize near-term earnings (sometimes through accounting manipulation) rather than build long-term value. Look for compensation structures that reward long-term stock appreciation, free cash flow growth, and return on capital rather than just revenue growth or EPS targets.

The Art of Capital Allocation

A CEO’s most important job is capital allocation: deciding what to do with the money the business generates. There are five primary uses of cash, and great capital allocators understand when to use each one.

Reinvest in the core business. This is the highest-return use of capital when the company has high-ROIC reinvestment opportunities. Amazon spent years reinvesting virtually all of its cash flow into new fulfillment centers, AWS infrastructure, and Prime services. The market initially punished this approach (Amazon had negligible earnings for years), but the reinvestment created enormous long-term value.

Make strategic acquisitions. Some companies are exceptional acquirers. Danaher has built a world-class life sciences and diagnostics business through disciplined acquisitions combined with its proprietary Danaher Business System. The key distinction is between companies that acquire strategically at reasonable prices and those that acquire recklessly, overpaying for growth they could not generate organically.

Buy back shares. Share repurchases, when executed at attractive prices, can be one of the most tax-efficient ways to return value to shareholders. Apple has repurchased over $600 billion worth of stock since 2012, reducing its share count by roughly 40%. At the prices Apple bought, these repurchases were enormously value-accretive. However, buybacks at inflated prices destroy value. Many companies buy the most stock near market peaks and stop buying during downturns, which is exactly backwards.

Pay dividends. Dividends provide shareholders with a tangible, recurring cash return. Companies with long histories of growing dividends (known as Dividend Aristocrats if they have raised dividends for 25+ consecutive years) tend to be mature, profitable businesses with predictable cash flows. Stocks like Procter & Gamble, Coca-Cola, and Johnson & Johnson have paid increasing dividends for over 50 consecutive years.

Reduce debt. Paying down debt strengthens the balance sheet and reduces financial risk. Companies with low or manageable leverage can survive economic downturns that bankrupt their more indebted competitors. During the 2008 financial crisis, companies with strong balance sheets were able to acquire distressed competitors at bargain prices while heavily leveraged companies went bankrupt.

Low Debt and Manageable Leverage

The importance of a clean balance sheet cannot be overstated for long-term investments. Leverage amplifies both gains and losses. In good times, debt-fueled growth looks brilliant. In bad times, debt becomes an existential threat. Since long-term investors will inevitably hold through multiple economic downturns, recessions, and market panics, owning companies with low debt dramatically reduces the risk of permanent capital loss.

A useful metric is the net debt-to-EBITDA ratio. Companies with this ratio below 2x are generally considered conservatively financed. Many of the best long-term compounders operate with net cash positions (meaning they hold more cash than debt). As of their most recent filings, Apple sits on roughly $50 billion in net cash. Alphabet (Google) holds over $100 billion. These fortress balance sheets provide an enormous margin of safety during market turbulence.

Pricing Power and Total Addressable Market

Pricing Power: The Ultimate Test of a Moat

Warren Buffett once said: “The single most important decision in evaluating a business is pricing power. If you have the ability to raise prices without losing business to a competitor, you have a very good business.” This might be the single most underappreciated quality in long-term investing.

Pricing power means a company can raise prices and its customers will keep buying. This is the ultimate test of whether a moat is real. A company might claim to have a strong brand or high switching costs, but if it cannot raise prices by 3-5% annually without losing customers, the moat is weaker than it appears.

Companies with genuine pricing power can grow revenue even when unit volumes are flat or declining. They can pass along input cost inflation to customers, protecting margins during inflationary periods. And they compound returns at a rate that exceeds GDP growth without needing to sell more units. This is an extraordinarily valuable quality over a 20-year holding period.

Consider Costco’s membership fees. Costco has raised the price of its standard membership multiple times over the past two decades, from $45 to $65, and its renewal rate has consistently remained above 90% in the U.S. and Canada. When you can raise prices and your customers do not leave, you have something special.

In the software world, Microsoft has raised the price of its Office 365 subscriptions multiple times. Enterprise customers grumble but almost never switch because the switching costs are too high and the product is too deeply embedded in their workflows. Similarly, Adobe transitioned from selling Photoshop as a one-time purchase for around $700 to a $55/month subscription, effectively increasing lifetime customer value dramatically. Users complained loudly on social media but stayed because there are no real alternatives for professional creative work.

Large and Growing Total Addressable Market

A company can have the widest moat in the world, but if it operates in a shrinking or tiny market, its growth will eventually hit a ceiling. The best long-term investments operate in large total addressable markets (TAMs) that are either already enormous or growing rapidly.

Amazon is the ultimate TAM expansion story. The company started by selling books online, a niche market. But Jeff Bezos understood from the beginning that the real TAM was all of retail commerce. And then he expanded further into cloud computing (AWS), digital advertising, streaming entertainment, grocery, healthcare, and logistics. Each expansion opened up a massive new growth avenue just as the previous one began to mature.

UnitedHealth Group (UNH) benefits from a TAM that is essentially the entire U.S. healthcare system, roughly $4.5 trillion in annual spending and growing at 5-7% annually due to aging demographics and rising healthcare utilization. A company with a 10% share of a $4.5 trillion market has enormous room to grow even without gaining market share, simply by riding the growth of the underlying market.

When evaluating TAM, be cautious about company presentations that define their market in the most optimistic possible terms. Look for companies where the addressable market is genuinely large, measurable, and growing for structural reasons (demographics, technology adoption, regulatory tailwinds) rather than cyclical ones.

Stocks That 10x’d: What Made Them Great

Theory is useful, but nothing teaches like real examples. Let us examine five companies that delivered 10x or greater returns over approximately 20-year periods, identifying exactly which qualities drove their extraordinary performance.

Apple (AAPL): From Near-Bankruptcy to the World’s Most Valuable Company

In January 2005, Apple stock traded at a split-adjusted price of roughly $1.60. By early 2025, it traded above $230, a return of over 14,000%. That is not a 10x return. It is a 140x return.

What made Apple a compounding machine? First, an unmatched brand moat. The Apple brand became synonymous with premium design, simplicity, and status. Second, an extraordinary ecosystem with massive switching costs. Once you own an iPhone, Apple Watch, MacBook, and AirPods and your entire family uses iMessage, switching to Android is not just inconvenient. It feels like moving to a different country where nobody speaks your language. Third, Apple’s Services business transformed the company from a hardware manufacturer into a recurring-revenue powerhouse. The App Store, iCloud, Apple Music, Apple TV+, and Apple Pay now generate over $90 billion in annual revenue at margins estimated above 70%.

Apple’s financial engine is extraordinary: ROIC consistently above 30%, free cash flow exceeding $100 billion annually, and over $600 billion returned to shareholders through buybacks and dividends since 2012. The company shrunk its share count by roughly 40% over a decade, supercharging per-share earnings growth.

Microsoft (MSFT): The Nadella Renaissance

Microsoft’s stock went essentially nowhere from 2000 to 2014, stuck in the low $20s to mid-$30s. Investors had given up on it. Then Satya Nadella became CEO, and the stock went from about $37 in early 2014 to over $420 by early 2025, a roughly 11x return in 11 years.

Nadella’s genius was recognizing that Microsoft’s true moat was not Windows. It was the deep enterprise relationships and switching costs built over decades. He pivoted the company’s center of gravity to Azure cloud computing and Office 365 subscriptions, two businesses with massive recurring revenue, high margins, and enormous switching costs. Companies that build their infrastructure on Azure and train their employees on Microsoft 365 rarely switch. The cost and disruption are simply too high.

Microsoft’s ROIC expanded from roughly 20% in 2014 to over 30% by 2024 as the shift to cloud and subscriptions improved the company’s capital efficiency. Operating margins expanded from about 30% to over 44%. The cloud transition turned Microsoft from a mature, slow-growth company into a high-growth compounder.

Amazon (AMZN): The Everything Store and Beyond

Amazon’s stock was about $18 in early 2005. By early 2025, it traded above $230, roughly a 13x return. But the more remarkable story is from Amazon’s IPO in 1997 at a split-adjusted price of about $1.50 to 2025, a return exceeding 15,000%.

Amazon’s moats are layered and reinforcing. The cost advantages from its massive logistics network make it nearly impossible for competitors to match Amazon on price and delivery speed. Network effects in its marketplace (more sellers attract more buyers, which attracts more sellers) created a flywheel that has made Amazon the default starting point for online shopping. And AWS, almost an accident of internal infrastructure needs, became a separate business with its own powerful moat: enterprises that build their applications on AWS face enormous switching costs.

What made Amazon unique was Jeff Bezos’s willingness to sacrifice short-term profits for long-term competitive advantage. For years, Amazon reinvested virtually every dollar of cash flow into growth, building the infrastructure moat that now generates enormous free cash flow. The company’s FCF went from roughly $2 billion in 2015 to over $35 billion by 2024.

Costco (COST): The Membership Moat

Costco traded at roughly $22 in early 2005. By early 2025, the stock exceeded $900, a roughly 40x return. For a retailer, a category notorious for razor-thin margins and ruthless competition, this is almost unheard of.

Costco’s moat is built on a cost advantage so extreme that it functions as a loyalty machine. The company operates on net margins of about 2.5% and uses its scale to offer prices that are typically 15-30% below supermarket prices on comparable products. But the real genius is the membership model. Costco generates the majority of its operating profit from membership fees, not from product markups. This means the company is economically incentivized to keep prices as low as possible, which drives more membership sign-ups, which funds more stores, which creates more buying power. It is a virtuous cycle that competitors cannot replicate without rebuilding their entire business model.

Costco’s membership renewal rate above 90% is one of the most impressive customer retention metrics in all of retail. The company has raised membership fees multiple times, and each time the renewal rate barely budges. That is pricing power in its purest form.

UnitedHealth Group (UNH): The Healthcare Compounder

UnitedHealth Group traded at roughly $25 (split-adjusted) in early 2005. By early 2025, the stock traded above $500, a return of roughly 20x. UNH compounded at approximately 16% annually for two full decades.

UNH benefits from a massive regulatory moat. The U.S. healthcare system is extraordinarily complex, and navigating its regulations requires enormous scale, compliance infrastructure, and government relationships that new entrants cannot easily replicate. The company’s Optum segment, which provides healthcare services, data analytics, and pharmacy benefit management, created a vertically integrated healthcare ecosystem that generates revenue from multiple points in the healthcare value chain.

UNH’s TAM is essentially the entire U.S. healthcare system, over $4.5 trillion in annual spending. The company has grown revenue at a CAGR of roughly 12% over the past 20 years, driven by organic growth, strategic acquisitions, and the inexorable growth of healthcare spending in an aging population. ROIC has consistently remained above 15%, and the company has been a reliable dividend grower and share repurchaser.

A Quality Scoring Framework for Long-Term Winners

Now let us turn theory into a practical tool. The following quality scoring framework assigns points across eight key dimensions. You can apply this framework to any U.S. stock you are evaluating for a long-term position. The maximum possible score is 40 points.

Interpreting Your Score

Applying the Framework: Sample Scores

Let us apply this framework to our five example companies at approximately their current characteristics:

All five companies score well above the 28-point “High Quality” threshold, which is consistent with their extraordinary long-term returns. Notice that no company scores a perfect 40. Even the best businesses have areas where they are merely good rather than exceptional. Amazon scores lower on ROIC and FCF because its business model requires enormous capital investment in logistics and cloud infrastructure. Costco scores lower on FCF margin because its deliberately thin margins are a feature, not a bug, of its business model.

The framework is not meant to be used mechanically. A stock scoring 38 is not automatically better than one scoring 32. But it does force you to systematically evaluate each dimension of business quality rather than falling in love with a company based on one or two attractive characteristics while overlooking critical weaknesses.

Conclusion: Building a Portfolio of Compounders

The evidence is overwhelming and consistent. Over long periods, the stock market’s biggest winners share a remarkably similar set of characteristics. They possess durable competitive moats that protect their profits from competition. They earn high returns on invested capital and generate abundant free cash flow. They are led by competent, honest managers who allocate capital wisely and have meaningful skin in the game. They operate in large, growing markets. They can raise prices without losing customers. And they maintain conservative balance sheets that allow them to survive and even thrive during economic downturns.

The companies that 10x’d over the past two decades were not lottery tickets. They were not meme stocks. They were not speculative bets on unproven technologies. They were high-quality businesses with visible, measurable competitive advantages that compounded value year after year. Apple, Microsoft, Amazon, Costco, and UnitedHealth were all well-known, heavily analyzed companies. The edge was not in finding them. It was in recognizing their quality, buying at a reasonable price, and having the patience to hold through the inevitable periods of fear and doubt.

This last point deserves emphasis. Every single one of those five stocks experienced at least one drawdown of 30% or more during its run-up. Apple fell over 30% multiple times. Amazon crashed nearly 90% during the dot-com bust and dropped over 50% in 2022. Microsoft went sideways for 14 years. The investors who earned those extraordinary returns were not the ones who timed the market perfectly. They were the ones who understood what they owned, had conviction in the quality of the business, and refused to sell during temporary periods of panic.

If you take one lesson from this article, let it be this: focus your research time on understanding business quality rather than predicting short-term stock price movements. Use the quality scoring framework to systematically evaluate companies. Look for the combination of moats, ROIC, free cash flow, management quality, pricing power, and growth runway that has characterized every great long-term investment in history. Build a concentrated portfolio of these compounders, buy them at reasonable prices, and then do the hardest thing in investing, which is nothing. Let the businesses compound. Let the earnings grow. Let the dividends accumulate. And let time do the heavy lifting.

The next Apple, the next Microsoft, the next 10x compounder is probably hiding in plain sight right now. The question is whether you will have the framework to recognize it and the patience to hold it.

References

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• Greenwald, Bruce, Judd Kahn, Paul Sonkin, and Michael van Biema. Value Investing: From Graham to Buffett and Beyond. 2nd Edition. Wiley, 2020.
• Apple Inc. Annual Reports and SEC Filings (10-K). investor.apple.com
• Microsoft Corporation. Annual Reports and SEC Filings (10-K). microsoft.com/investor
• Amazon.com Inc. Annual Reports and SEC Filings (10-K). ir.aboutamazon.com
• Costco Wholesale Corporation. Annual Reports and SEC Filings (10-K). investor.costco.com
• UnitedHealth Group. Annual Reports and SEC Filings (10-K). unitedhealthgroup.com/investors
• McKinsey & Company. “What Is ROIC and Why It Matters.” mckinsey.com
• Dorsey, Pat. The Little Book That Builds Wealth: The Knockout Formula for Finding Great Investments. Wiley, 2008.