5.1 Liquidity and Working Capital Metrics

Why Liquidity Shows Up on the FMVA Final

CFI's Financial Analysis Fundamentals course sits in the core path for a reason. The FMVA final is a modeling exam, not a credit-rating exam, but every three-statement case still asks whether the company can fund growth, service debt, and keep the cash line non-negative. Liquidity is the near-term version of that question: can current resources cover current claims? Working capital is the stock of operating current items that stands between accrual profit and cash. If you mix cash or the revolver into that stock, the model double-counts financing and the cash plug is garbage.

This section uses one consistent company, Northline Components, a manufacturer. The same Year 0 and Year 1 balance sheets reappear in 5.2 and 5.3, so the ratios, the days, and the cash flow statement all describe one set of books.

Current Assets, Current Liabilities, and the Current Ratio

Current assets are resources expected to become cash within one year or one operating cycle: cash, marketable securities, accounts receivable, inventory, and prepaid expenses. Current liabilities are claims due within one year: accounts payable, accrued expenses, deferred revenue that will be earned within a year, the current portion of long-term debt, and short-term revolver draws.

The current ratio is:

Current ratio = Current assets / Current liabilities

It is a coverage ratio of stocks, not a cash forecast. A ratio above 1.0x means current assets exceed current liabilities. It does not mean the firm can pay tomorrow's payroll, because inventory and receivables are not cash yet.

Northline Year 0 and Year 1 current items

Year 0 current ratio = $235,000 / $115,000 = 2.04x. Year 1 current ratio = $340,000 / $150,000 = 2.27x. The ratio improved even though current liabilities rose $35,000, because cash and receivables rose faster. That is a first read, not a conclusion. Some of Year 1 cash came from a debt draw, which we will split out when we get to net debt in 5.2.

Exam trap: do not treat a rising current ratio as automatically healthy. If the increase is all inventory that is not selling, or all receivables that are not collecting, liquidity on paper has improved while cash conversion has worsened.

The Quick Ratio: Inventory Comes Out

The quick ratio (acid-test ratio) asks a stricter question: if the firm cannot sell inventory in time, can it still cover current claims with cash-like assets?

Quick ratio = (Cash + short-term investments + accounts receivable) / Current liabilities

Equivalently, (Current assets − inventory − prepaid expenses) / Current liabilities. Inventory is removed because it must be sold, often at a discount, before it becomes cash. Prepaids are removed because they are already spent cash (insurance, rent) that will become expense, not cash inflows.

Northline Year 1 quick assets = $120,000 cash + $120,000 AR = $240,000. Quick ratio = $240,000 / $150,000 = 1.60x. Cross-check: ($340,000 − $90,000 − $10,000) / $150,000 = 1.60x. Year 0 quick ratio = ($50,000 + $100,000) / $115,000 = 1.30x.

The gap between current ratio 2.27x and quick ratio 1.60x is inventory (plus prepaids). That gap is useful. A retailer with slow-moving stock can look fine on the current ratio and tight on the quick ratio. A services firm with little inventory will have current and quick ratios that almost match.

The cash ratio is stricter still: cash / current liabilities. Northline Year 1 = $120,000 / $150,000 = 0.80x. It ignores receivables as well as inventory. Credit analysts use it when collection risk is high. Modelers rarely forecast a target cash ratio; they forecast a minimum cash balance and let the revolver absorb the rest.

Operating Net Working Capital (Exclude Cash and Debt)

The current ratio uses every current line, including cash and interest-bearing debt. Operating net working capital (NWC) does not. CFI's modeling convention, and the one you should default to on the FMVA final, is:

Operating NWC = Current operating assets − Current operating liabilities

Exclude cash (or at least excess cash) and exclude interest-bearing debt (revolver, commercial paper, current portion of long-term debt). Those are financing items. Cash is what the cash flow statement explains. Debt is what the debt schedule explains. If you fold them into NWC, you will forecast cash twice and the balance sheet will only balance by accident.

Current operating assets typically include accounts receivable, inventory, and prepaid expenses. Current operating liabilities typically include accounts payable, accrued expenses, and deferred revenue. Many compact FMVA models use the three-line version AR + inventory − AP. A fuller model keeps prepaids and accruals. Both versions still exclude cash and debt.

A credit-analysis variant keeps a small operating cash balance (for example 1–2% of sales) inside NWC and treats only excess cash as non-operating. That is useful when you compute net debt for enterprise value. It is the wrong setup for a three-statement cash plug, because the plug is total cash.

Northline operating NWC

Year 0: $100,000 + $75,000 + $10,000 − $50,000 − $15,000 = $120,000. Year 1: $120,000 + $90,000 + $10,000 − $60,000 − $20,000 = $140,000. ΔNWC = +$20,000, a use of cash.

The compact AR + inventory − AP version is $125,000 in Year 0 and $150,000 in Year 1 (Δ +$25,000). The $5,000 difference is the extra accrued-expense source. Section 5.3's cash flow statement uses the fuller $20,000 figure so prepaids and accruals are not orphaned. Either definition is acceptable on the exam if you apply it consistently and keep cash and debt out.

If you instead computed accounting NWC as current assets minus current liabilities, Year 1 would be $340,000 − $150,000 = $190,000. That number mixes $120,000 of cash and $70,000 of short-term interest-bearing debt into an "operating" stock. Do not use that total as the working-capital line in a three-statement model.

Efficiency Ratios: Turn the Stock into Days

Liquidity ratios are snapshots. Efficiency ratios tell you how fast the operating stocks turn. CFI's Financial Analysis Fundamentals set is inventory turnover, receivable days, payable days, total asset turnover, and net asset turnover.

Northline Year 1 income statement facts used here and in 5.2–5.3: revenue $1,200,000, COGS $720,000. Use 365 days unless a case specifies a 360-day convention.

Days inventory outstanding (DIO) is how long product sits before it is sold. Days sales outstanding (DSO) is how long customers take to pay. Days payable outstanding (DPO) is how long the firm takes to pay suppliers. COGS is the usual denominator for inventory and payables at a manufacturer; some cases use purchases for DPO. Revenue is the denominator for DSO because receivables come from sales, not from COGS.

When the case gives opening and closing balances, average the stocks. Northline average total assets = ($615,000 + $750,000) / 2 = $682,500; average total asset turnover = $1,200,000 / $682,500 = 1.76x. Average net assets (capital employed) = [($615,000 − $115,000) + ($750,000 − $150,000)] / 2 = $550,000; average net asset turnover = 2.18x. Net asset turnover asks how hard the long-term capital base works after current operating claims. Do not confuse it with fixed-asset turnover (revenue / net PP&E), which for Northline is $1,200,000 / $410,000 = 2.93x on year-end PP&E.

Cash Conversion Cycle

The cash conversion cycle (CCC) stitches the three day counts into one operating-cycle number:

CCC = DIO + DSO − DPO

Northline Year 1: 45.6 + 36.5 − 30.4 = 51.7 days. The firm invests in inventory, then in receivables, and only partly offsets that investment with supplier credit. For about 52 days of the cycle it must finance the gap with cash, a revolver, or longer-term capital.

A shorter CCC is usually better: less cash trapped in the cycle. CCC can be negative when DPO exceeds DIO + DSO (some retailers collect cash before they pay vendors). Negative CCC is a source of cash as the business scales, not a math error.

Exam trap: adding DPO instead of subtracting it. Payables are a source of cash. Stretching DPO shortens the CCC and reduces NWC. That can be operational skill or distress (the firm is paying late because it is out of cash). Pair the days with the cash flow statement before you celebrate a longer DPO.

Why Rising NWC Consumes Cash in a Three-Statement Model

The income statement is accrual. If Northline sells $20,000 more on credit than it collects, revenue and net income rise, AR rises, and cash does not. The indirect cash flow statement starts at net income and subtracts the increase in operating NWC to get back to cash. Sign convention, memorized as a sentence: an increase in NWC is a use of cash; a decrease in NWC is a source of cash.

Northline's operating NWC rose $20,000. Section 5.3 will show cash from operations = net income $100,000 + D&A $40,000 − $20,000 = $120,000. Get the sign wrong and the entire cash line, the revolver draw, and every subsequent interest number are wrong.

Growth makes this mechanical. Hold Northline's days constant and grow sales 20% to $1,440,000, with COGS still 60% of sales ($864,000).

• AR at 36.5 days = $1,440,000 × 36.5 / 365 = $144,000 (was $120,000)
• Inventory at 45.6 days = $864,000 × 45.6 / 365 = $108,000 (was $90,000)
• AP at 30.4 days = $864,000 × 30.4 / 365 = $72,000 (was $60,000)
• Compact NWC = 144 + 108 − 72 = $180,000 (was $150,000)
• ΔNWC ≈ +$30,000 of cash consumed, with no change in margins or days

That is why a profitable, growing manufacturer can still need a revolver. The three-statement model is doing its job when NWC scales with revenue on constant days and cash from operations lags net income. If a case grows revenue 20% and you hold AR, inventory, and AP in dollars instead of days, you have silently assumed a massive CCC improvement. That is an exam error, not a free cash windfall.

FMVA Traps for This Section

• Current ratio vs NWC. Current ratio includes cash and short-term debt. Operating NWC excludes them. Do not use CA − CL as the working-capital forecast line.
• Quick ratio still includes receivables. If collection risk is the point of the question, even 1.60x can be too kind.
• Year-end vs average. Two balance sheets in the case → average the stocks unless the question asks for a year-end snapshot.
• DPO denominator. Match the case. Manufacturers often use COGS; a trading company may give purchases. Do not mix revenue into DPO.
• Sign of ΔNWC. Rising AR or inventory uses cash. Rising AP or accruals provides cash. The net $20,000 Northline build is an outflow on the cash flow statement.