DLS Glossary

Key terms and metaphors from David Levin Steinberg

Understanding DLS's Investment Language

David Levin Steinberg uses distinctive metaphors and concepts throughout his investment writings. This glossary explains the key terms, their meanings, and how to apply them in your own investment analysis. Each term links back to core DLS principles and provides context for when to use them.

Showing 15 of 15 terms

The Tree Becomes Its Rings
ROIC

A company's value is ultimately determined by its ability to reinvest capital at high rates of return over time. Just as a tree's growth is recorded in its rings, a company's true worth is built through years of compounding returns on invested capital.

Flying Elephants
Skepticism

A metaphor for unsustainable growth projections or business models that defy economic gravity. When someone promises you a flying elephant, be skeptical—elephants don't fly, and neither do most 'revolutionary' business models that ignore fundamental economics.

The Magician Creates Self-Deception
Behavioral

The greatest risk in investing isn't the market—it's your own mind. The 'magician' is your ego, creating narratives that justify poor decisions. The magician doesn't trick you; you trick yourself by believing what you want to believe rather than what the evidence shows.

Free Cash Flow Yield
Valuation

The owner's true profit—what's left after all necessary reinvestment to maintain the business. FCF yield (FCF/Market Cap) represents what an owner actually receives, making it the most honest measure of value. A 7%+ FCF yield on a quality business is typically attractive.

Conviction from Understanding
Conviction

True investment conviction doesn't come from spreadsheets or price targets—it comes from deeply understanding the business. When you truly understand why a business succeeds and what could make it fail, you can hold through volatility with confidence.

The Substitution Test
Quality

Ask yourself: 'If this product or service disappeared tomorrow, what would happen?' Would customers notice? Would it cause 'terrific problems'? Or would they simply switch to an alternative? The answer reveals the true strength of a business's competitive position.

Four to Five Year Timeframe
Time Horizon

The optimal investment horizon for seeing a thesis play out. Within four to five years, you should expect to see the full earnings power of a business emerge. If a company is constantly 'investing for the future' with no clear path to profitability within this window, it becomes speculative.

Volatility Lives in the Mind
Behavioral

Market volatility is a psychological phenomenon, not a fundamental one. A 20% price drop doesn't change the underlying business—it only changes the market's current opinion. Managing volatility means managing your own psychology, not predicting market movements.

Context, Not Resistance
Volatility

When a stock you own drops significantly, the first response shouldn't be panic or denial. Instead, ask: 'Is there a message here?' Has the business changed? Has the competitive landscape shifted? Use volatility as information, not as something to resist.

Rat Poison in Small Doses
Accounting

Non-GAAP adjustments and 'one-time' charges are like rat poison—a little might be acceptable, but too much will kill you. When management makes excessive adjustments to reported earnings, they're often hiding uncomfortable truths about the business.

The Ocean
Philosophy

The market is like an ocean—vast, powerful, and indifferent to individual investors. You cannot control the ocean, but you can learn to navigate it. Success comes from understanding its patterns, respecting its power, and maintaining your vessel (portfolio) properly.

Capital Allocation is the CEO's Job
Management

The most important skill of a CEO is not operations—it's capital allocation. Where does the cash go? Reinvestment, acquisitions, dividends, buybacks? Great capital allocators compound wealth; poor ones destroy it. Always evaluate management by their capital allocation track record.

Distrusting the Market is Expensive
Market Psychology

Perpetual bearishness is a costly strategy. The market, over time, reflects the growth of human enterprise. While skepticism about individual companies is healthy, chronic distrust of the market itself leads to missed opportunities and poor long-term returns.

Concentration with Conviction
Portfolio

Diversification protects against ignorance. If you truly understand a business, concentration makes sense. A portfolio of 10-20 positions allows for meaningful conviction while managing risk. Over-diversification dilutes returns and signals lack of conviction.

The Hardest Thing to Sell
Selling

The hardest thing to sell is a great investment that has appreciated significantly. The temptation to 'lock in gains' is powerful, but selling a compounder too early is one of the most costly mistakes an investor can make. Let winners run if the thesis remains intact.