CFA Level I · CFA Level I Exam

Working Capital and Liquidity for CFA Level I

Working capital and liquidity covers how a company funds day-to-day operations and pays short-term bills. You measure it with liquidity ratios and the cash conversion cycle (days of inventory + days of receivables − days of payables), then manage receivables, inventory, payables, cash investments and short-term borrowing to balance cost and risk.

What this chapter covers

This chapter sits in Corporate Finance. It asks one practical question: can the company pay what it owes in the near term, and at what cost? You start with what working capital is and why it matters. You then measure it with the operating cycle, the cash conversion cycle and liquidity ratios such as the current, quick and cash ratios.

The second half is about management. You look at sources of liquidity, how to invest surplus cash safely, how to handle receivables, inventory and payables, and how to choose among short-term funding options such as bank lines, commercial paper and factoring. You compare their costs, usually as an effective annual rate.

The chapter links closely to Financial Statement Analysis, where the same ratios and day-count measures appear, and to Fixed Income, where money market instruments and yields are used. It also ties to capital structure and cost of capital. Questions can include calculations and concept checks, so this chapter rewards clean practice.

Corporate Finance carries a modest share of the Level I exam, and this chapter is one part of it. Questions can include a single calculation, such as a cash conversion cycle or the cost of a trade discount, plus concept checks on liquidity sources and investment policy. With 180 questions, no penalty for wrong answers and about 90 seconds per question, a formula you know well is quick marks. The same ratios also help you in Financial Statement Analysis questions, so the effort pays twice.

Working Capital and Liquidity: topics in the order to study them

1Working Capital Management BasicsIt defines working capital, the goals of managing it and the trade-off between liquidity and return, which every later topic builds on.
2Cash Conversion Cycle and Operating CycleThese day-count formulas are the core calculations of the chapter, and you need them before judging how receivables, inventory and payables behave.
3Liquidity Measures and RatiosOnce you can read the cycle, add the current, quick and cash ratios to judge a company's short-term strength from its statements.
4Liquidity Management and Sources of LiquidityAfter measuring liquidity, learn where it comes from, such as cash, credit lines and asset sales, and how to judge whether it is adequate.
5Short-Term Investment Policy and InstrumentsSurplus cash needs a policy and instruments, and this topic builds on the liquidity sources you just covered.
6Managing Receivables, Inventory and PayablesThis applies the cash conversion cycle to actions, showing how each component can be sped up or slowed down and what that costs.
7Short-Term Financing Sources and CostsLast, because you compare borrowing options and calculate their costs, which draws on everything earlier, including discount terms from payables.

How to prepare Working Capital and Liquidity

Plan about a week of short sessions. Most of the marks come from a few formulas and clear definitions, so practice beats long reading.

Read the basics once and write a one-line definition of working capital, liquidity and the liquidity-versus-return trade-off.
Learn the cash conversion cycle as: days of inventory on hand + days of sales outstanding − days of payables. Practice it with averages and with year-end balances, and note which the question gives you.
Memorise the current, quick and cash ratios and what each leaves out. Practice ranking them for a company: cash ratio ≤ quick ratio ≤ current ratio. The order holds because each numerator is a subset of the next (cash and securities, then add receivables, then add inventory and other current assets) and all three share the same denominator, current liabilities.
Make a short list of liquidity sources and short-term instruments. For each, note its risk, return and liquidity, so you can eliminate options in an MCQ.
Work through receivables, inventory and payables questions, including the cost of skipping a trade discount. Use the formula for cost = (1 + discount ÷ (1 − discount))^(365 ÷ days) − 1, where days is the extra credit period gained.
Finish with timed sets of single-calculation questions at about 90 seconds each. Review every miss and write down the reason.

Common mistakes in Working Capital and Liquidity

Adding days of payables instead of subtracting them in the cash conversion cycle.
Fix: Write the formula as inventory days + receivable days − payable days every time, and check that payables are the only negative.
Mixing up what the quick and cash ratios include.
Fix: Build them in layers: cash and securities first, then add receivables for the quick ratio, then add inventory and other items for the current ratio.
Using the wrong day-count base or ignoring the denominator choice.
Fix: Underline the balance type and the day count in the stem before calculating, and use what the question states.
Calculating the cost of a trade discount as the discount percent alone.
Fix: Compute 1 + discount ÷ (1 − discount), raise it to the power 365 ÷ extra days, then subtract 1.
Treating a higher liquidity ratio as always better.
Fix: Remember that excess liquidity can mean idle cash, slow inventory or generous credit terms, which lowers returns.
Picking the highest-yield short-term instrument without checking risk and liquidity.
Fix: Rank options on safety first, then liquidity, then yield, in line with a conservative investment policy.

Last-day revision: Working Capital and Liquidity

Operating cycle = days of inventory on hand + days of sales outstanding.
Cash conversion cycle = operating cycle − days of payables outstanding.
A shorter cash conversion cycle generally means less cash tied up in operations.
Current ratio = current assets ÷ current liabilities.
Quick ratio = (cash + short-term marketable securities + receivables) ÷ current liabilities.
Cash ratio = (cash + short-term marketable securities) ÷ current liabilities.
Primary liquidity sources include cash balances and operating cash flow; secondary sources include credit lines and asset sales.
Short-term investments trade off safety and liquidity against yield.
Skipping a trade discount is often a costly form of borrowing; compute its effective annual rate.
Commercial paper is often cheaper than a bank line for strong issuers but is less flexible.
Check whether a question wants averages or period-end balances before computing day counts.
Read the units: days, years and percent are easy to mix up.

Working Capital and Liquidity practice questions

Working Capital and Liquidity in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Working Capital and Liquidity: frequently asked questions

How do you calculate the cash conversion cycle for CFA Level I?

Add days of inventory on hand and days of sales outstanding to get the operating cycle. Then subtract days of payables outstanding. Check whether the question gives average or ending balances and use the same basis for all three.

Is a negative cash conversion cycle good?

It can be, because suppliers are effectively financing the company's operations. Still, read the question carefully. It may depend on the company's bargaining power and on whether payables are being stretched too far.

Do I need a calculator for working capital questions?

Yes. Use an approved calculator (TI BA II Plus or HP 12C); both have a yx key for the power calculation. You need it for most day counts and ratios, and for the effective cost of skipping a discount.

How many questions can I expect from this chapter?

CFA Institute publishes topic ranges, not per-chapter counts. Corporate Finance is 6-9% of the exam, and this chapter is one part of it. Expect a few questions, mostly short calculations and concept checks.