A Pancake Stand Worth Millions?
Old Wang's pancake stand makes ¥100,000 profit every year. He wants to retire and sell it. How much would you pay?
If you just multiply: ¥100K × 10 years = ¥1 million. But wait — ¥100K ten years from now isn't worth the same as ¥100K today. That's because of a concept called the time value of money.
Why Money Today > Money Tomorrow
Three reasons why ¥100 today is worth more than ¥100 next year:
💡 The Three Drivers of Time Value
- Inflation — prices rise, so future money buys less
- Opportunity cost — today's money can be invested and earn returns
- Risk — the future is uncertain; money in hand is guaranteed
If we assume a 10% annual return, ¥100K next year is only worth ¥90,909 today. That's "discounting" — converting future value back to present value.
Back to Old Wang's Pancake Stand
Let's discount each year's ¥100K cash flow back to today at 10%:
| Year | Cash Flow | Discount Factor | Present Value |
|---|---|---|---|
| 1 | ¥100K | 0.909 | ¥90,909 |
| 2 | ¥100K | 0.826 | ¥82,645 |
| 3 | ¥100K | 0.751 | ¥75,131 |
| 5 | ¥100K | 0.621 | ¥62,092 |
| 10 | ¥100K | 0.386 | ¥38,554 |
Add up all 10 years of discounted cash flows: the fair value is approximately ¥614,000. This is the DCF valuation.
So when someone asks you to pay ¥1 million for Old Wang's stand — you're overpaying by 63%. If they ask for ¥500K — you're getting a bargain.
DCF and Stock Investing
Stocks work exactly the same way. A company's intrinsic value equals the sum of all future free cash flows, discounted back to today.
"The value of any stock, bond, or business is determined by the cash inflows and outflows, discounted at an appropriate interest rate, that can be expected to occur during the remaining life of the asset."
When you buy Moutai stock, what you're really buying is: all the cash that Moutai will generate from now until eternity, discounted back to today.
The Three Key Variables
💡 DCF's Three Core Inputs
- Free Cash Flow (FCF) — the cash a company generates after all expenses and investments
- Discount Rate — your expected return rate, typically 8-12%
- Growth Rate — how fast FCF grows each year; determines long-term value
These three variables have vastly different impacts on the final valuation:
| Variable | Small Change | Impact on Valuation |
|---|---|---|
| FCF | ±10% | ~±10% |
| Discount Rate | 10%→8% | ~+30% |
| Growth Rate | 3%→5% | ~+40% |
Notice: the discount rate and growth rate have the biggest impact — a small change dramatically swings the valuation. This is why Buffett says, "I'd rather be approximately right than precisely wrong."
Why DCF Is More of a Mindset
Buffett has said he's never actually pulled out a calculator to do a formal DCF. The power of DCF isn't in the formula — it's in the thinking framework it gives you:
💡 DCF Thinking Framework
- Forces you to think about a company's FUTURE, not just its past
- Makes you estimate cash flows, not just look at earnings
- Requires you to consider what return rate you need (your opportunity cost)
- Gives you a 'price anchor' so you're not swayed by market sentiment
- Reminds you: a business is only worth the cash it will generate
💡 DCF Core Summary
- DCF = Sum of all future cash flows discounted to present value
- The pancake stand analogy: ¥100K/year × 10 years ≠ ¥1M (because of time value)
- Three key inputs: cash flow, discount rate, growth rate
- The discount rate and growth rate matter far more than precise cash flow forecasts
- DCF is more a thinking framework than a calculation tool
- Buffett: 'I'd rather be approximately right than precisely wrong'
Next recommended reading: "DCF Valuation Model: A Practical Tutorial" — hands-on with Apple as an example.