The 5 formulas for successful investing according to Warren Buffett

Warren Buffett’s investment philosophy created extraordinary wealth over six decades, transforming Berkshire Hathaway from a struggling textile company into one of the most valuable companies in the world. His approach is not based on complex algorithms or market timing, but rather on fundamental principles that any investor can understand and apply.

These five essential formulas form the backbone of Buffett’s investment strategy, providing a roadmap for creating long-term wealth through intelligent stock selection. He also used these principles to acquire entire businesses for Berkshire Hathaway and turn it into one of the largest companies in the world.

1. The Value Investing Formula: Buy Below Intrinsic Value

At the heart of Buffett’s strategy is the concept of intrinsic value, which represents what a company is actually worth based on its ability to generate cash over its life. This calculation goes well beyond simply looking at current earnings or book value. Rather, it involves projecting the value of future cash flows that the business will produce and discounting them to their current value.

Buffett learned this approach from his mentor Benjamin Graham, but he refined it by focusing more on the quality and predictability of these future cash flows. When he values ​​a company, he estimates all the cash it can generate between now and judgment day, then determines what that cash flow is worth today. This requires analyzing the company’s competitive position, management quality and industry dynamics to project sustainable earnings power.

The key to this formula is the margin of safety. Buffett generally looks to buy stocks trading at least 25% to 50% below his calculated intrinsic value. His mentor, Graham, focused on book value and current earnings as a measure of inherent value, while Buffett learned to focus on future growth potential, thanks to Charlie Munger.

This cushion protects against errors in judgment and unforeseen business challenges. If he determines that a company is worth $100 per share based on discounted future cash flows, he might wait until it is trading between $50 and $75 before buying. This patience has been crucial to its success, as it significantly reduces the risk of permanent capital loss while increasing the chances of potential future returns.

2. The debt-equity formula

Buffett’s approach to debt is refreshingly simple: he calculates the debt-to-equity ratio by dividing total liabilities by shareholders’ equity, and he strongly prefers companies with ratios below 0.5. This conservative stance on debt stems from his belief that large companies should not need to borrow heavily to grow.

Companies with low debt have multiple advantages that appeal to Buffett. They can weather economic storms without running the risk of bankruptcy, they have the flexibility to seize opportunities during economic downturns when their competitors are struggling, and they generate returns through operational excellence rather than financial engineering. Conversely, high debt levels can exacerbate problems in tough times and force companies to make short-term decisions that compromise long-term value.

Buffett particularly admires companies that generate so much cash internally that they can finance all of their growth initiatives without external financing. These companies exemplify the type of economic force that drives the creation of compound wealth over decades. When a company can grow consistently using only its retained earnings, it demonstrates that management is creating real value rather than simply growing through acquisitions or debt.

3. The return on equity (ROE) formula

Return on equity is Buffett’s primary scorecard for management effectiveness. Calculated as net income divided by shareholders’ equity, ROE reveals how effectively a company turns investor capital into profits. Buffett looks for companies that consistently generate ROE above 15% without using excessive leverage to boost their numbers.

What makes ROE so valuable to Buffett is its ability to reveal sustainable competitive advantages. A company that consistently maintains a high ROE year after year likely possesses exceptional qualities that keep its competitors at bay. It might be a powerful brand, unique technology, or cost advantages that others can’t replicate. These businesses naturally increase wealth because they can reinvest their profits at high rates of return.

Consistency matters more than the occasional spectacular performance. Buffett prefers companies that deliver a stable 20% ROE over many years rather than those that alternate between 40% returns and losses. This reliability indicates a sustainable economic model that can increase wealth through different economic cycles. It also suggests honest and competent management capable of maintaining operational excellence over time.

4. The Owner’s Earnings Formula

While most investors focus on reported earnings per share, Buffett calculates what he calls “owners’ profits” to understand the true cash-generating power of a company. This formula starts with net income, adds depreciation and amortization (non-cash expenses), then subtracts capital expenses. Additional working capital is required to maintain the competitive position and unit volume of the company.

This calculation reveals how much cash is actually paid to owners after the company has financed all necessary investments. Many companies report impressive profits but require constant reinvestment to maintain their market position, leaving shareholders with little real cash flow to benefit from. Buffett avoids these capital-intensive businesses in favor of those that generate substantial free cash flow.

The advantage of focusing on owners’ profits is that it cuts through accounting complexity to reveal economic reality. A software company may report lower profits due to high depreciation charges, but generate a huge cash flow that requires minimal reinvestment. Conversely, a manufacturing company can report stable profits while spending all its money on upgrading its equipment. Homeowner income reveals these crucial differences that traditional measures might mask.

5. The Economic Gap Formula

Buffett’s concept of economic moats represents perhaps his most important contribution to investment thinking. It looks for companies with sustainable competitive advantages that protect their profits from erosion by competitors. These moats take various forms, each creating barriers that prevent competitors from stealing market share or imposing price cuts.

Strong brands create moats by building customer loyalty and offering premium prices. Network effects create moats when products become more valuable as the number of users increases. High switching costs lock out customers who would face significant expenses or inconvenience if they had to switch providers. Cost advantages related to scale, unique assets or superior processes create moats by allowing companies to undercut their competitors while maintaining healthy margins.

The width and durability of these moats determine how long a company can maintain above-average returns on capital. Buffett assesses moats by asking whether a competitor with unlimited resources could successfully challenge the incumbent’s position.

If the answer is no, the company likely has the type of sustainable advantage that creates long-term value. This executive explains why he held positions at companies like Coca-Cola and American Express for decades, believing their moats will protect long-term returns.

Conclusion

Warren Buffett’s five formulas work together as an integrated system for identifying exceptional investments. By combining intrinsic value calculations with careful attention to debt levels, return on equity, owner profits and competitive advantages, investors can identify companies capable of accumulating wealth over decades.

These principles have proven themselves across different market conditions and economic cycles, demonstrating that successful investing depends not on predicting short-term market movements, but on understanding business fundamentals and having the patience to let the power of compounding work its magic.

While applying these formulas requires discipline and emotional courage, they provide any investor with a proven way to build lasting wealth through the stock market.