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Hi everyone,
We have all been there.
You find a stock you love. The story is great, the fundamentals look solid. You pull up the chart... and you see a vertical line going straight up.
Suddenly, you freeze.
One voice in your head says: "Buy now before you miss out!"
The other voice says: "Wait for the dip... don't be the idiot buying the top."
It’s the classic Investor's Dilemma. To stop guessing, I built a 4-Step Valuation Roadmap to filter out expensive stocks in seconds. I visualized the process into the flowchart attached above.
Here is the breakdown of how to use it:
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Step 1: The Context Check (The Moat)
Before I even look at the P/E ratio, I check the durability.
\* Wide Moat: (e.g., ARM, Microsoft). High switching costs or network effects. These deserve a premium valuation.
\* No Moat: (e.g., Airlines). They compete on price. These are "Capital Destruction" machines over the long term.
\* Rule: If Moat = None, I stop. The price doesn't matter if the business is indefensible.
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Step 2: The Profit Fork
You cannot value all stocks the same way. You must ask: Is it actually making money?
\* Path A (Profitable): I value these based on Earnings (P/E, PEG).
\* Path B (Unprofitable): I value these based on Revenue and Survival (P/S, Cash).
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Step 3: The Valuation Rules (The Traffic Light)
For Profitable Stocks (Path A):
P/E is useless in a vacuum. A P/E of 50 is cheap if growth is 50%. A P/E of 10 is expensive if growth is 0%.
I use the PEG Ratio (P/E divided by EPS Growth).
\* PEG < 1.0: Undervalued. (Green Light).
\* PEG \~ 1.5: Fair Value.
\* PEG > 2.0: Expensive.
\* (Note: For dividend stocks, I use the PEGY Ratio to give them credit for the yield).
For Unprofitable Stocks (Path B):
I use Price-to-Sales (P/S).
\* P/S < 10: Generally cheap for high-growth tech.
\* P/S > 50: The "Danger Zone." At 50x sales, the company is priced for absolute perfection.
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Step 4: The "Quality/Survival" Check
If a stock looks expensive (PEG > 2.0), is it an automatic sell? Not necessarily. It might be a "Ferrari."
\* The Margin Test: High prices require high Gross Margins (>70% for Software, >40% for Hardware). If the margins are low and the price is high, it's a bubble.
\* The Cash Runway: For unprofitable companies, I check (Total Cash / Annual Burn). If they have <1 year of cash left, dilution is guaranteed. I stay away.