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How is your Return on Invested Capital (ROIC) chart obtained?

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The Return on Invested Capital (ROIC) chart. Can you please provide details how it was obtained? Is it via a paid subscription service or did you derived this manual using the financial statements e.g. Balance Sheet and Income Statements?

I calculate it from the financial statements. The most convenient place for me to take the data from is Stock Doctor. However, it is also easily calculated for each year from the annual statements on the Announcements page on the ASX website. The formula is on the Glossary page of my website.