Free course · Module 5
Compare profit with cash, spot accounting warning signs and learn from Enron and Wirecard.
Written by the StockEducation Editorial Team · Reviewed by Associate Professor Charles Lo, CPA, PhD · Updated 15 Oct 2026 · How we check lessons
Read in order, or return to the idea you need.
Idea 1 of 4
Profit is an accounting measure. Operating cash flow tracks cash moving through the business. They need not match in a single year. A company can record a sale before the customer pays, or spend cash building inventory for next year.
Compare both over matching periods. If profit keeps rising while operating cash falls, read the reconciliation and notes. Ask what changed before deciding what it means.
The 10-Q attributes the outflow mainly to the return of margin deposits. It reports $1,005 million of operating cash excluding that deposit activity. That context matters: the headline cash figure alone does not explain the business or prove fraud.
Operating cash divided by net income is about −1.61 here. There is no universal healthy-company cutoff of 1. The ratio is especially misleading when net income is zero or close to zero.
A red flag tells you where to look. It does not tell you what you will find.
Idea 2 of 4
Seven warning signs fit into three questions. A cluster deserves closer investigation; an isolated flag can have an ordinary explanation.
Check profit against operating cash, receivables against sales, and inventory against sales. More receivables can mean slower collection. More inventory can mean unsold products. Growth, acquisitions or timing can also explain the changes.
Check Compare consistent periods and read the working-capital explanation.
Look for recurring “one time” charges, large related party deals, and obligations involving unconsolidated entities. Repeated exclusions can make adjusted profit look stronger than the recurring economics justify.
Check Read the reconciliation, related party notes, guarantees and commitments.
Read about auditor changes, disagreements, qualified opinions or disclaimers, control weaknesses, and cash held by trustees or in restricted accounts. An unqualified audit opinion is useful evidence; it is not a guarantee against fraud.
Check Read the audit report, Item 9 and Item 9A. Ask how reported cash was verified.
Start with Item 8 for the statements and notes. Read Item 7 for management’s discussion of results, liquidity and commitments. Follow Item 13’s proxy reference when present. A missing standalone “off balance sheet” heading does not mean there are no relevant obligations.
Evidence can justify more questions without establishing intent or a legal finding of fraud.
Idea 3 of 4
Enron: reported profit changed when hidden obligations came back onto the books. Its November 8, 2001 filing restated net income for 1997 to 2000. Consolidating entities and recording earlier audit adjustments removed $591 million, about 22% of the four-year total.
Wirecard: a cash balance is only as reliable as the evidence behind it. On June 22, 2020, its board said that €1.9 billion of trust-account balances probably did not exist. It withdrew preliminary results. The company had been in Germany’s DAX 30 index.
A famous name, index membership or an impressive profit figure does not replace checking the reports.
Idea 4 of 4
Use a company as a research exercise. Build a small table for three matching fiscal years: revenue, net income, operating cash, and year-end receivables. Get an older filing if the latest one shows only two balance-sheet dates.
Record the filing date and whether the numbers were restated. Check acquisitions and classification changes. Write one possible explanation and one unanswered question, then compare an appropriate peer.
Enron originally reported $979 million of net income and $100,789 million of revenue in 2000. Use matching units. The model divides net income by revenue; it cannot detect fraud.
Originally reported figures, not the later restated accounts. Change either input to practise the arithmetic. Revenue must be greater than zero. A low margin alone does not establish fraud. Source 4.
Open the Profitability Calculators →Write down the evidence, the explanation and the remaining uncertainty.
Quick check
Choose an answer to see the explanation.
Choose an answer to see the explanation.
Choose an answer to see the explanation.
Profit records sales when earned and includes estimates and non-cash items. Operating cash records cash collected and paid. Receivables, inventory, timing and estimates can widen the gap. That is why the next step is reading the reconciliation, not declaring fraud.
Reading markers and these practice checks stay on this device. They do not mark the LMS lesson complete.
The cases describe historical reporting failures. Figures labelled “originally reported” are not assurances that those accounts were correct. The margin model demonstrates arithmetic only. A red-flag checklist cannot establish or exclude fraud.
StockEducation provides general education, not personal financial, tax or legal advice. Nothing here recommends a specific security. Investing involves risk, including loss of money you invest.
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