A measure of financial performance calculated by dividing net income by shareholders' equity, expressing how effectively a company generates profits from shareholders' investments. ROE indicates management's efficiency in using equity capital.
Formalized in the mid-20th century as a key profitability metric, building on basic accounting relationships between profits and capital. The concept evolved from simple return calculations to become a cornerstone of DuPont analysis and financial performance evaluation.
ROE is like a report card that tells you how hard your money is working inside a company! Warren Buffett loves companies with consistently high ROE because they're like compound interest machines - they take your dollar and turn it into $1.15 or $1.20 year after year, creating wealth almost automatically.
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