Older Monkeys — has a DCF ever been accurate?

Based on the most helpful WSO content, the accuracy of a DCF (Discounted Cash Flow) model is often debated. While DCFs are a fundamental tool in valuation, their accuracy depends heavily on the assumptions made, such as growth rates, discount rates, and terminal values.

Several points to consider:

1. High Sensitivity to Inputs: DCFs are highly sensitive to abstract inputs like growth to perpetuity, WACC, and CAPM. Small changes in these assumptions can lead to vastly different valuations, making it challenging to achieve precise accuracy over long periods.

2. Market Value vs. Implied Value: In the short to medium term, market value often diverges from the implied value calculated by a DCF. This is due to market sentiment, macroeconomic factors, and other external influences that a DCF cannot account for.

3. Evolving Business Dynamics: Over a 10-15 year horizon, businesses and industries can undergo significant changes, such as technological advancements, regulatory shifts, or competitive pressures, which can render initial DCF assumptions outdated.

4. Practical Use: Many professionals acknowledge that while DCFs provide a structured framework for valuation, they are often used as a sanity check or to understand the implications of certain assumptions rather than as a precise predictor of future share prices.

In summary, while a DCF can sometimes align with actual outcomes, its accuracy over a long horizon is inherently limited by the unpredictability of future events and the sensitivity of its inputs. It’s more of a guiding tool than a crystal ball.

Sources: DCF Myth 1: If you have a D(discount rate) and a CF (cash flow), you have a DCF!, DCF Myth 1: If you have a D(discount rate) and a CF (cash flow), you have a DCF!, DCF Myth 3.2: If you don't look, its not there!, DCF Modeling Course ~ Pre-training text.pdf, DCFs no longer necessary?