ROAS (Return on Ad Spend) is a vanity metric that can mask unprofitable customer acquisition. By focusing on POAS (Profit on Ad Spend), brands are forced to measure the actual profit generated from advertising, linking marketing directly to bottom-line health and avoiding the trap of 'growing broke'.

Venture capital returns materialize over a decade, making short-term outputs like markups unreliable 'mirages.' Sequoia instead measures partners on tangible inputs. They are reviewed semi-annually on the quality of their decision-making process (e.g., investment memos) and their adherence to core team values, not on premature financial metrics.

The debate over AI chip depreciation highlights a flaw in traditional accounting. GAAP was designed for physical assets with predictable lifecycles, not for digital infrastructure like GPUs whose value creation is dynamic. This mismatch leads to accusations of financial manipulation where firms are simply following outdated rules.

Traditional valuation multiples are increasingly misleading because GAAP rules expense intangible investments (R&D, brand building) rather than capitalizing them. For a company like Microsoft, properly capitalizing these investments can drop its P/E ratio from 35 to 30, revealing a more attractive valuation.

The true differentiator for top-tier companies isn't their ability to attract investors, but how efficiently they convert invested capital into high-margin, high-growth revenue. This 'capital efficiency' is the key metric Karmel Capital uses to identify elite performers among a universe of well-funded businesses.

WeWork created "Community Adjusted EBITDA," a metric that conveniently excluded core costs like rent and salaries. This farcical KPI incentivized top-line growth at any cost, masking massive unprofitability and ultimately destroying shareholder value. Be wary of overly creative accounting.

Beyond outright fraud, startups often misrepresent financial health in subtle ways. Common examples include classifying trial revenue as ARR or recognizing contracts that have "out for convenience" clauses. These gray-area distinctions can drastically inflate a company's perceived stability and mislead investors.

While many investors screen for companies with high Return on Invested Capital (ROIC), a more powerful indicator is the trajectory of ROIC. A company improving from a 4% to 8% ROIC is often a better investment than one stagnant at 12%, as there is a direct correlation between rising ROIC and stock performance.

Before analyzing a balance sheet or income statement, read the footnotes. They act as a legend, revealing the specific accounting choices, definitions, and modifications management has made. This context is essential to accurately interpret the numbers and understand the underlying business reality.