Week 8: Reading Financial Statements — IS, BS, CF for Investors

---

1. Why This Is Important

A public company speaks in three documents. The income statement, the balance sheet, and the cash flow statement. Everything else — the press release, the conference call, the analyst note, the stock price — is commentary on those three. If you cannot read the documents themselves, you are reading a translation of a translation, hoping the translator did not lie.

For an investor — not an accountant, not an auditor — the goal is narrow. You are not trying to recompute deferred tax liabilities. You are trying to answer four questions, in order, in under twenty minutes per company:

Is the business growing, and is the growth profitable? That

lives on the income statement, in the path from revenue down to operating income.

Is the business solvent and capitalised? That lives on the

balance sheet — assets versus liabilities, working capital, the debt stack.

Is the reported profit real cash, or accounting? That lives

on the cash flow statement, in the gap between net income and operating cash flow. It is the only one of the three that is hard to fake.

Are the three stories consistent? When revenue grows but cash

flow does not, when earnings grow but receivables grow faster, when book equity grows but free cash flow does not — something is either wrong, or about to be.

The CFA curriculum spends roughly fifteen percent of Level I on financial statement analysis. We will spend one week on it, plus a side lesson on the 10-K filing wrapper (side02_10k_filing.md). The two together are enough to read most filings competently. They are not enough to audit one. That is fine. As Horace puts it: alpha sources include "look at cash, not earnings". You do not need to outwork the auditors to outperform the index. You need to know which line of which statement to land on first.

---

2. What You Need to Know

2.1 The Three Statements as One Story

The three statements are not three independent documents. They are three views of one underlying ledger, and they are mathematically linked.

• The income statement covers a period (a quarter or a year). It

starts at revenue and works down to net income. Time-window view: flow.

• The balance sheet is a snapshot at a single date — usually the

last day of the period. Assets equal liabilities plus equity. Point-in-time view: stock.

• The cash flow statement also covers a period. It explains the

change in cash on the balance sheet, broken into three buckets: cash from operations (OCF), cash used for investing (CFI), and cash from financing (CFF).

The three are linked by two bridges:

• Net income flows into retained earnings on the balance sheet.

Last year's equity plus net income minus dividends equals this year's equity, before share buybacks and other adjustments.

• Operating cash flow starts from net income and adjusts. Add

back non-cash charges (depreciation, stock-based compensation), adjust for working capital changes (receivables, payables, inventory). Whatever is left after capital expenditure is **free cash flow**, and that is the number that pays dividends, retires debt, and funds buybacks.

The investor's discipline: read all three together, and trust the cash flow statement most when they disagree.

2.2 The Income Statement — Revenue Down to Net Income

The income statement is a waterfall. Revenue at the top, deductions at each step, net income at the bottom. Five waypoints matter.

Revenue. What customers actually paid (or owed) for goods and services delivered in the period. The single hardest line to fake across multiple years, because it is also the line that auditors tie back hardest to receipts and contracts.

Gross profit = Revenue − Cost of goods sold. Direct cost of producing what was sold. Gross margin (gross profit / revenue) tells you how much pricing power and unit economics the business has. A software company should print 70%+ gross margin; an airline, 10–20%. Compare within an industry, not across.

Operating income (EBIT) = Gross profit − Operating expenses. Subtract R&D, SG&A, depreciation, and amortisation. This is what the actual operations of the business earned, before the financial structure (interest) and the tax authority (taxes). Operating margin is the cleanest measure of business quality.

Pre-tax income = Operating income − Net interest. Add interest income, subtract interest expense, throw in any non-operating items (gains or losses on investments). This is where the *capital structure* shows up. A heavily-indebted company can have great operating margins and ugly pre-tax income.

Net income = Pre-tax income − Income taxes. The "bottom line." Divided by share count, you get earnings per share (EPS).

The image below walks Apple's FY2024 (year ending September 2024) income statement and cash flow as a single horizontal waterfall — revenue all the way to free cash flow.

The most important visual takeaway is the gap between the rightmost two bars: net income $94B versus free cash flow $109B. Apple converted more cash than it booked as accounting profit. That is a hallmark of a healthy capital-light business. The opposite gap — net income materially above free cash flow, year after year — is the textbook accounting-quality warning sign.

2.3 The Balance Sheet — Assets, Liabilities, Equity

The balance sheet is governed by one identity:

$$ \text{Assets} = \text{Liabilities} + \text{Shareholders' Equity} $$

It always balances by construction. Bookkeeping is double-entry — every dollar of asset has a dollar of either a claim against it (liability) or ownership of it (equity). This is not deep economics; it is the structure of the ledger.

What matters for an investor is the composition of each side.

On the asset side, the order top-to-bottom is liquidity:

• Cash and equivalents. Sitting in a money-market fund or short

T-bills. Spendable today.

• Short-term investments and accounts receivable. Convertible

to cash within a year — but receivables can go bad.

• Inventory. Goods waiting to be sold. The longer it sits, the

staler and more discountable it becomes.

• Property, plant, and equipment (PP&E). Factories, machines,

data centres. Long-lived. Reported at historical cost less accumulated depreciation, which can wildly understate replacement value (think a hundred-year-old refinery).

• Goodwill and intangibles. What the company paid for

acquisitions above the target's book value, plus internally-held brand or patent values. The line that gets impaired (written down) when an acquisition turned out to be a mistake.

On the liability side, the order is when the bill is due:

• Accounts payable. Owed to suppliers, typically 30–60 days.
• Short-term debt and current portion of long-term debt. Coming

due within a year. The classic solvency stressor.

• Long-term debt. Bonds and term loans. The single most

important liability for understanding the capital stack.

• Pension and lease obligations. Often understated or

off-balance-sheet under prior accounting; now mostly captured under the current rules but still worth checking.

Shareholders' equity is the residual — assets minus liabilities. It is mostly composed of (1) common stock plus paid-in capital (what shareholders put in), (2) retained earnings (cumulative net income kept inside the business), and (3) treasury stock (the negative of buybacks). For a mature company that has been buying back stock for years, treasury stock can be enormous; companies like Boeing and Starbucks have negative shareholders' equity precisely because they have bought back more stock than they have retained. Negative book equity is not by itself a problem if the cash flow is healthy — it is just a note that the company has chosen buybacks over balance-sheet padding.

The two practitioner ratios you actually use:

• Current ratio = Current assets / Current liabilities. Above 1

is generally healthy; below 1 means the company depends on refinancing, inventory turnover, or revolver capacity to meet near-term obligations.

• Net debt / EBITDA. Total debt minus cash, divided by trailing

twelve-month EBITDA. Below 2× is conservative; 3–4× is normal for many sectors; above 5× is leveraged-buyout territory and starts to look fragile under a recession or a rate spike.

2.4 The Cash Flow Statement — The One That's Hard to Fake

This is the statement that separates investors from speculators.

Net income is an opinion — a defensible one, signed by auditors, but built on dozens of estimates: depreciation lives, allowance for doubtful accounts, inventory write-downs, stock-based compensation, revenue-recognition timing. Cash flow is a fact. Either the bank balance went up, or it didn't.

The statement is built in three sections:

• Cash from operating activities (CFO or OCF). Starts at net

income, adds back non-cash items (depreciation, amortisation, stock-based compensation), and adjusts for working-capital changes (receivables up = cash out; payables up = cash in; inventory up = cash out). End result: actual cash the operating business generated.

• Cash from investing (CFI). Capital expenditure (negative,

reinvested in the business), acquisitions (negative), proceeds from sales of assets (positive), and changes in marketable securities portfolios.

• Cash from financing (CFF). Debt raised or repaid, equity

issued or bought back, dividends paid.

The single most-used investor metric:

$$ \text{Free Cash Flow (FCF)} = \text{OCF} - \text{Capex} $$

Free cash flow is what the business could return to all capital providers without diminishing its operating capacity. It pays dividends, funds buybacks, retires debt, finances acquisitions. Persistent free cash flow is the only economic basis for any of those things. Companies that pay dividends or buy back stock without generating free cash flow are doing so by issuing debt or equity — borrowing from one set of investors to pay another, which is fine for a year and ruinous over a decade.

The discipline Horace pushes: when the gap between net income and free cash flow grows, distrust the income statement. Earnings can be manipulated; cash is harder. The chart below shows this exact gap for Apple over the last decade.

In FY2020, EPS dropped relative to FCF because COVID-era working capital released cash (customers paid, inventory drew down) faster than accounting earnings were recognised. In FY2024, a one-time roughly $10B European Commission tax charge depressed reported net income without touching the actual cash collected from customers. Both years are clean illustrations of the same lesson: the cash is the fact; the earnings are the opinion.

2.5 Common-Size Statements — Reading Across Time and Companies

Raw dollar figures are hard to compare. Apple at $391B revenue and Coca-Cola at $46B revenue are not in the same league of size, but they may be in the same league of quality. **Common-size statements** rebase every line as a percentage of revenue (income statement) or total assets (balance sheet). That removes the size bias and makes the structure of the business visible.

A common-size income statement for FY2024 looks like this for our three example companies:

Line	Apple	Coca-Cola	JPMorgan
Revenue	100%	100%	100%
Gross profit	46%	60%	n/a
Operating income	32%	30%	41%
Net income	24%	23%	32%
Free cash flow / revenue	28%	21%	n/a

Three very different businesses, three very different cost structures, but all three converting roughly a quarter of revenue into net profit — a sign that all three sit at the high-quality end of their respective sectors. Banks (JPMorgan) are excluded from the gross-profit and FCF rows because their income statement structure is fundamentally different (net interest income, provisions for credit losses, no real "cost of goods sold"). Banks need their own template, which we cover in Week 33.

The interactive panel below lets you switch between Apple, Coca-Cola, and JPMorgan, toggle between Revenue / Net Income / OCF / FCF, and see the ten-year history side by side with common-size ratios. The goal is to develop a visual sense for how different sectors look on the page, so you can flag anomalies on filings you have never seen before.

2.6 What an Investor Actually Reads, in What Order

A practical reading sequence for a new company, twenty minutes:

Revenue trend, ten years. Growing? Decelerating? Cyclical?

Look at the cash flow statement summary too — does cash track revenue?

Operating margin trend, ten years. Expanding (pricing

power), flat (steady state), contracting (competition or cost pressure)?

Free cash flow versus net income, ten years. Do they track?

When they diverge, in which direction and why? Persistent FCF below net income is the loudest single warning.

Net debt / EBITDA, current and trend. Capital structure

sustainable in a 5%-rate world? Refinancing wall in the next 18 months?

Capital allocation, last three years. Buybacks vs dividends

vs reinvestment vs M&A. Funded from FCF or from new debt?

The 10-K side lesson (side02_10k_filing.md) covers where in the document to find each of these — Item 7 (MD&A), Item 8 (statements), Item 1A (risk factors), notes to the financial statements. The combination of what to read (this lesson) and where in the filing it lives (the side lesson) is enough to put you in the top decile of retail investors by financial literacy. That is a low bar but a real one.

---

3. Common Misconceptions

Misconception 1: "Earnings are the most important number."

Earnings are an opinion produced by accounting choices. Free cash flow is a fact. When they agree, the business is genuinely profitable. When they disagree persistently, the cash flow is right and the earnings are wrong, almost without exception.

Misconception 2: "A profitable company cannot go bankrupt."

Profitable companies go bankrupt all the time — when they cannot service their debt. Profit is on the income statement; cash to pay bondholders is on the cash flow statement. Many of the most famous bankruptcies (Toys "R" Us, Hertz at the LBO peak) happened to companies that were "profitable" right up until the refinancing window slammed shut.

**Misconception 3: "Negative book equity means the company is insolvent."**

Not in the modern era. Mature buyback-heavy companies (Boeing, Starbucks, McDonald's at points) have negative book equity simply because they have repurchased more stock than they have retained. Solvency is determined by the ability to service obligations from cash flow, not by the sign of the book-equity line.

Misconception 4: "Big depreciation charges are bad."

Depreciation is a non-cash charge. It reduces accounting profit but does not reduce cash. A capital-intensive business (utility, railroad, refinery) will always have high depreciation; it compresses earnings but not cash flow. The right comparison is capex versus depreciation: capex above depreciation means the business is growing or replacing aging assets; capex well below depreciation means the company is harvesting (running down its asset base for cash). Either can be right depending on the strategy.

Misconception 5: "Stock-based compensation is not a real cost."

It is. Companies (especially in tech) like to present "adjusted EPS" with SBC added back, framing it as non-cash. It is non-cash in the period, but it dilutes existing shareholders and very much costs them economically. Treat SBC as a real cost. Adjusted EBITDA that excludes SBC is one of the few numbers in finance that is nearly always misleading.

Misconception 6: "Goodwill represents real value."

Goodwill is a plug — the residual of acquisition price over the target's identifiable net assets. It is not depreciated; it is tested for impairment annually. Many companies' goodwill quietly balloons through acquisitions and then suddenly collapses in a single quarter when the deal does not work. Treat the goodwill line with extreme skepticism, especially for serial acquirers.

Misconception 7: "If the auditor signed it, it's accurate."

Auditors test for material misstatement, not truth. The Big Four sign-off on Enron, Wirecard, and Lehman are the standing reminders that audit assurance is far weaker than retail investors imagine. The audit is a backstop, not a guarantee.

**Misconception 8: "All companies in the same sector should look similar."**

The sector frames the structure, not the quality. Two software companies can both have 70% gross margins, but if one has 30% operating margin and the other 5%, they are not in the same business in any meaningful sense. Common-size analysis is most useful precisely because it highlights these dispersions within a sector.

---

4. Q&A

Q1: I have never read a 10-K. Where do I start?

A: Open Apple's most recent 10-K on EDGAR. Read Item 7 (MD&A) end to end — it is management explaining the year in their own words. Then jump to Item 8 and look at the three statements. Spend ten minutes on each. Then read the first three risk factors in Item 1A. That is a working forty-minute first pass. The side lesson on the 10-K filing structure (side02_10k_filing.md) walks the document section by section.

Q2: What is the single most informative ratio?

A: There is no single one. If you held a gun to my head, **free cash flow / revenue** for non-financial businesses. It captures the ability to convert sales into spendable cash, which subsumes gross margin, working-capital efficiency, and capital intensity in one number. Above 15% is high-quality; above 20% is exceptional. For banks, return on tangible common equity (ROTCE) is the analogous one-number summary.

Q3: Why do GAAP earnings and "adjusted earnings" disagree?

A: Companies present non-GAAP adjusted figures to highlight what they argue is the recurring economic earnings power, excluding one-time items, M&A-related amortisation, restructuring charges, and (often) stock-based compensation. Some adjustments are honest (genuine one-time charges); some are not (recurring SBC dressed up as non-recurring). Read both. Distrust the gap. SEC Regulation G requires reconciliation of any non-GAAP figure to its GAAP equivalent — the reconciliation is where the truth lives.

Q4: How do I read a bank's financial statements?

A: Banks are different. Their "revenue" is net interest income plus non-interest income, not "revenue minus COGS." Their key lines are net interest margin, provision for credit losses, the efficiency ratio (non-interest expense / revenue), and ROTCE. Their balance sheet is dominated by loans (asset) and deposits (liability). We cover this in Week 33; the framework is genuinely distinct.

Q5: What is "earnings management" and how do I spot it?

A: Smoothing reported earnings via legal but discretionary accounting choices — accelerating revenue recognition into a soft quarter, deferring expenses, building or releasing reserves. Spot it by comparing operating cash flow to net income year over year. Persistent operating cash flow below net income, with growing receivables or growing inventory, is the classic combination. Beneish's M-Score and Sloan's accruals ratio are formal tools investors use; for a casual reader, the OCF-to-NI gap is enough.

Q6: What about non-US companies — same statements?

A: Mostly. Outside the US, companies file under IFRS (International Financial Reporting Standards) rather than US GAAP. The structure of the three statements is the same; the line-item conventions differ in places (LIFO inventory not allowed, capitalised R&D allowed, lease accounting differs). This course restricts the investable universe to US-listed equities — but many of those (ADRs, foreign-domiciled US-listed companies) file under IFRS via 20-F. The three-statement framework still applies.

Q7: How often should I re-read a company's statements?

A: Quarterly, lightly. Annually, deeply. The 10-K (annual) is the document that matters. The 10-Qs (quarterly) are progress reports; read the MD&A and skim the statements to make sure nothing is breaking. Re-read the full 10-K every year for any position you hold longer than twelve months.

**Q8: Should I trust company-reported metrics that aren't on the financial statements? (e.g., monthly active users, ARR, "core EPS")**

A: With calibration. Operating metrics outside GAAP can be useful forward indicators but are unaudited and definitionally elastic. Compare year over year and against the company's own definition in prior periods (companies sometimes redefine MAUs or ARR to flatter trends). Cross-check against the audited cash flow. Persistent ARR growth that does not show up as cash collected is a story; cash collected with declining ARR is a real warning.

Q9: How does this connect to valuation?

A: Every valuation method we cover from Week 21 onward uses these three statements as inputs. P/E uses net income. P/B uses shareholders' equity. EV/EBITDA uses operating income plus depreciation. DCF uses free cash flow projections. You cannot pressure-test any valuation if you cannot rebuild the inputs from the statements. That is why this lesson sits where it does in the sequence — before any of the valuation work.

Q10: Will I have to do this forever, or do tools automate it?

A: Tools (StockAnalysis, Macrotrends, Tikr) display the headline numbers. They do not read the notes, do not catch the SBC games, do not flag the goodwill build-ups. The screen-and-skim layer is automated; the reading layer is not, and probably will not be. The portfolio-level edge is still in *which lines you look at and in what order*, which is what this lesson teaches.