Understanding companies
Return on equity, or ROE, relates a defined profit for ordinary owners to their accounting equity. It measures reported earning power on that book-value base, not investment return from the share price.
Make it click
Compare a workshop's yearly output with the owners' capital recorded in it. More borrowing or a smaller recorded base can raise the ratio without making the workshop safer.
Now put that into markets
ROE usually divides annual profit attributable to ordinary shareholders by average ordinary equity. Numerator and denominator must describe the same claimants and period.
Margins, asset efficiency and financial leverage can all drive ROE. Buybacks, write-downs and negative equity can distort or make the ratio meaningless.
Compare several years and decompose the driver. Use average equity where the balance changes materially and inspect whether profit is supported by cash.
High ROE can reflect a strong business, heavy leverage or a depleted denominator. It does not show the valuation paid by an investor.
Takeaway
