10/16/2026
The Investing Ratio I Pay The Most Attention To 📊
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Stock analysis comes with dozens of ratios.
P/E. PEG. ROE. Debt/EBITDA. Margins. Free cash flow yield.
They're all useful for answering different questions.
But if you're trying to understand the quality of a business, one of the most important is ROIC — Return on Invested Capital.
🧠 What is ROIC?
ROIC measures how efficiently a company turns the capital invested in its business into operating profits.
Imagine two companies each invest $1 million into expanding.
Company A generates $50,000 of additional annual operating profit.
Company B generates $200,000.
All else equal, you'd much rather own the business that can generate more profit from every dollar it puts to work.
That's the basic idea behind ROIC.
📈 Why does this matter so much?
Great businesses don't just make money.
They can often reinvest that money at attractive returns.
A company generates cash → reinvests it into new stores, products, technology, factories, or acquisitions → generates additional profits → reinvests again.
When a company can maintain a high ROIC while continuing to find opportunities to reinvest, you have the ingredients for powerful long-term compounding.
But don't analyze ROIC alone
A high ROIC doesn't automatically make a stock a good investment.
You still need to understand growth, valuation, debt, cash flow, competitive advantages, and whether today's ROIC is sustainable.
And what counts as a "good" ROIC varies considerably between industries.
The lesson
As a beginner, don't try to memorize 50 financial ratios at once.
Start by understanding what each number is actually telling you about the business.
ROIC asks one of the most important questions of all:
“How good is this company at turning invested money into more money?”
The best long-term compounders often have a very good answer.
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📝 This is in no way financial advice. You’re responsible for your own investing decisions.