Daily Economics, Business & Finance Study

October 15, 2026 (KST) · Day 25
Today's Topic: Do Higher Prices Raise Revenue and Profit? — CPI, PPI, the GDP Deflator, and Pricing Power

1. Review of the Previous Lesson

Day 24 distinguished nominal GDP from real GDP and examined which source of demand—consumption, investment, government spending, or net exports—drove growth. Today, we separate the price changes that increase nominal amounts into the CPI, PPI, and GDP deflator, then analyze how inflation flows through to a company's revenue, margins, and cash flow.

2. Today's Core Concept

Inflation does not increase every company's profit. Revenue is generally determined by sales volume × realized price, but profit depends on how much faster and more persistently selling prices rise than raw-material, labor, logistics, and financing costs.

Today's core questions are:

1. Whose prices, and which prices, do the CPI, PPI, and GDP deflator each measure?
2. How is the inflation rate different from the price level?
3. Why can gross margin decline even after a company raises prices?
4. How can we verify a company's pricing power through price, volume, product mix, margins, and cash flow?

The basic links in company analysis are:

\[ Nominal\ revenue =Sales\ volume\times Realized\ price \]

\[ Gross\ profit =Nominal\ revenue-Cost\ of\ sales \]

The price increase itself is less important than whether volume and customers remain after the increase, and whether the increase protects margins and cash flow beyond the rise in costs.

3. Concept Explanation

3-1. The price level and the inflation rate are different

A price index usually sets the price level of a representative basket of goods and services at 100 in a base period and shows how much it changes thereafter.

The inflation rate is the percentage change in the index.

\[ Inflation\ rate =\frac{Current\ period\ price\ index-Prior\ period\ price\ index}{Prior\ period\ price\ index} \times100 \]

For example, if a price index rises from 100 to 110 and then to 113.3 the following year:

• First-year inflation rate: 10%
• Following-year inflation rate: 3%
• Price level: 13.3% above the base period

In other words, slower inflation does not mean that prices fell. Prices may still be rising, just at a slower pace. A decline in the price level is deflation; a decline in the rate of price increases is disinflation.

The basis of monthly figures also matters.

• Month over month: compared with the immediately preceding month
• Year over year: compared with the same month one year earlier
• Seasonal adjustment: whether recurring effects such as holidays, seasons, and sales events were adjusted
• Annualization: whether the pace for one month or quarter is assumed to continue for a full year

3-2. The CPI measures the average change in consumer prices

CPI stands for Consumer Price Index. It measures the average change in the prices consumers pay for a representative basket of consumer goods and services.

Price changes for individual items are weighted by their shares of household expenditure. A large price increase in an item with a small expenditure weight may therefore have only a limited effect on the overall CPI.

\[ CPI\ inflation \approx\sum(Item\ price\ inflation\times Expenditure\ weight) \]

When reading the CPI, distinguish among:

• Headline index: includes all surveyed consumer items
• Core index: excludes certain volatile items such as food and energy to assess the underlying trend
• Goods inflation: prices of goods such as food, energy, and durable goods
• Services inflation: prices of housing, dining, medical care, education, and personal services

Core inflation is not always the more accurate “true inflation.” Food and energy are real household expenses. The headline index is useful for assessing the burden households actually feel, while the core index is useful for evaluating persistent inflation pressure.

The CPI also measures an average consumer basket, so it can differ from an individual's experienced inflation. If a household's shares of housing, education, medical care, or car use differ from the average, its burden can differ even under the same CPI environment.

3-3. The PPI measures changes in selling prices received by producers

PPI stands for Producer Price Index. From the producer's perspective, it measures the average change in prices that domestic producers receive for selling goods and services.

The difference between the CPI and PPI is not merely “retail prices versus wholesale prices.”

An important caveat is that the PPI is not the same as a particular company's cost inflation. The PPI is an index of output prices received by producers. A company's actual costs depend on raw materials, labor, electricity, logistics, rent, exchange rates, and contract terms.

Nevertheless, increases in prices for intermediate inputs such as oil, metals, chemicals, and transportation can affect finished-goods costs and consumer prices with a lag. Detailed producer-price and commodity data can therefore provide early clues about cost pressure.

3-4. The GDP deflator covers prices of final output produced domestically

The GDP deflator is a broad price measure calculated from the relationship between nominal and real GDP.

\[ GDP\ deflator =\frac{Nominal\ GDP}{Real\ GDP}\times100 \]

The scope of the three measures differs.

For example, a sharp increase in imported oil prices can affect domestic consumer prices and corporate costs, but imported oil itself is produced abroad and is therefore not directly included in the GDP deflator. Export prices, by contrast, can be included because exports are final output produced domestically.

If the CPI and GDP deflator move differently, it does not mean that one is wrong. They measure different things and use different weights.

3-5. A rise in the PPI does not automatically produce a rise in the CPI

The path from higher costs to final consumer prices can be represented as follows.

\[ Higher\ raw\ material\ prices,\ exchange\ rates,\ and\ wages \rightarrow Higher\ production\ costs \rightarrow Adjustment\ in\ factory-gate\ prices \rightarrow Adjustment\ in\ distribution\ and\ retail\ prices \rightarrow Reflected\ in\ CPI \]

The speed and magnitude of pass-through differ by company.

• Long-term fixed-price contracts delay price adjustments.
• Costs may appear later if inventory was secured in advance.
• Intense competition may force the company to absorb higher costs in its margin.
• Strong brand loyalty and high switching costs may make price increases easier.
• Changes in retailers' promotions and margins can cause producer and consumer prices to move differently.
• Government regulation, administered-price changes, and subsidies can delay or soften pass-through.
• When demand is weak, a price increase can cause a large decline in volume.

The gap between the PPI and CPI can therefore offer a clue about the pricing environment, but the simple difference between the two indexes cannot predict a specific company's margin.

3-6. Pricing power means more than “the ability to raise prices”

Pricing power is the ability to raise selling prices when costs rise without losing substantial customers, volume, or market share, while preserving economic profit.

A company's nominal revenue growth can be simplified as follows.

\[ Revenue\ growth \approx Volume\ growth +Realized\ price\ growth +Product\ mix\ effect +FX\ effect +Acquisition\ and\ divestiture\ effect \]

Here, realized price is not the list price. It is the average price actually received after discounts, rebates, coupons, and sales incentives.

Strong pricing power generally appears in a combination of:

• Higher realized prices
• Limited declines in volume, customer count, or renewal rates
• Stable or increasing market share
• Stable or improving gross margin
• No excessive increase in promotions or customer-acquisition costs
• Improved OCF and FCF after the price increase

If a company raises its list price but expands discounts, suffers a sharp decline in volume, or spends much more on advertising, the higher sticker price alone is not evidence of strong economic pricing power.

3-7. The difference in the speed of price and cost changes determines margins

Gross margin is:

\[ Gross\ margin =\frac{Revenue-Cost\ of\ sales}{Revenue}\times100 \]

To analyze pass-through, examine the price-cost spread.

\[ Price-cost\ spread \approx Realized\ price\ growth-Unit\ cost\ growth \]

• If realized prices rise faster than unit costs, gross margin may improve.
• If prices and unit costs rise at the same rate, gross margin may broadly hold.
• If unit costs rise faster than prices, gross margin can decline even as nominal revenue increases.

In practice, product mix, production yields, utilization, fixed manufacturing overhead, and inventory accounting can make actual margins differ from this simple spread. If higher costs first enter inventory and are recognized in cost of sales only when the inventory is sold, there is also a lag between commodity-price changes and the income statement.

3-8. Inflation can pressure working capital before it pressures profit

Even when production volume is unchanged, higher unit costs for raw materials and inventory require more cash.

\[ Required\ working\ capital \approx Accounts\ receivable+Inventory-Accounts\ payable \]

In an inflationary environment:

• Accounts receivable: balances rise with nominal revenue even if payment terms are unchanged
• Inventory: carrying values rise as unit costs increase even if quantities are unchanged
• Accounts payable: more supplier credit can partly reduce the cash burden
• OCF: can decline because of higher working capital even if net income rises

It is therefore insufficient to conclude that a company benefits from inflation merely because revenue and net income rose. Check whether the profit created by price increases is converted into cash rather than trapped in inventory and receivables.

3-9. High inflation does not make every real asset or stock rise

Inflation can increase nominal corporate revenue, but it can also cause:

• Higher raw-material, labor, and logistics costs
• Weaker real consumer purchasing power
• Central-bank rate hikes or prolonged high rates
• Lower valuations as discount rates rise
• Cash pressure from higher inventory and receivables
• Lower profitability on long-term fixed-price contracts

Whether a company benefits from inflation should therefore be judged by pricing power, debt structure, asset turnover, contract duration, and valuation, not merely by whether it owns real assets.

4. A Simple Numerical Example

The following figures for consumer companies A and B are fictional and for educational purposes. They are not actual company figures. Monetary amounts are in KRW 100 million, sales volume is in 10,000 units, and SG&A is assumed to remain unchanged at KRW 200 billion.

① Prior-year results

\[ Prior-year\ gross\ margin =\frac{3{,}000}{10{,}000}\times100 =30\% \]

\[ Prior-year\ operating\ margin =\frac{1{,}000}{10{,}000}\times100 =10\% \]

Assume that cost inflation raises unit cost by 10% from KRW 70 to KRW 77 in the current year.

② Company A: price rises 5%, but volume falls 10%

\[ Company\ A\ revenue =90\times105 =KRW\ 945\ billion \]

\[ Company\ A\ cost\ of\ sales =90\times77 =KRW\ 693\ billion \]

\[ Company\ A\ gross\ profit =9{,}450-6{,}930 =KRW\ 252\ billion \]

\[ Company\ A\ operating\ profit =2{,}520-2{,}000 =KRW\ 52\ billion \]

\[ Company\ A\ gross\ margin =2{,}520\div9{,}450 =26.67\% \]

The company raised prices by 5%, but costs rose by 10% and volume fell by 10%. Revenue fell by 5.5% and operating profit by 48%. Company A raised its sticker price, but the result does not indicate strong pricing power.

③ Company B: price rises 12%, while volume falls only 2%

\[ Company\ B\ revenue =98\times112 =KRW\ 1{,}097.6\ billion \]

\[ Company\ B\ cost\ of\ sales =98\times77 =KRW\ 754.6\ billion \]

\[ Company\ B\ gross\ profit =10{,}976-7{,}546 =KRW\ 343\ billion \]

\[ Company\ B\ operating\ profit =3{,}430-2{,}000 =KRW\ 143\ billion \]

\[ Company\ B\ gross\ margin =3{,}430\div10{,}976 =31.25\% \]

Company B raised prices faster than costs rose, while the decline in volume was limited. Revenue rose by 9.76% and operating profit by 43%. In this example, Company B has relatively stronger pricing power.

④ Calculate the price required to maintain the existing gross margin

If unit cost is KRW 77, the price required to maintain the prior 30% gross margin is:

\[ Required\ price =\frac{77}{1-0.30} =KRW\ 110 \]

If all other factors, including volume and mix, are unchanged, the company needs at least a 10% price increase. When unit cost rises by 10%, price must also rise by 10% to maintain a 30% gross margin.

⑤ Annualize a monthly inflation rate

If a price index rises by a seasonally adjusted 0.4% month over month and that pace is mechanically assumed to continue for 12 months, the compounded annualized rate is:

\[ (1.004)^{12}-1 \approx4.91\% \]

This is not a forecast that prices will actually rise by 4.91% over the next year. It is only a mechanical annualization of one month's pace, so it should be read together with multi-month trends and the year-over-year rate.

5. How to Use It in Stock and Company Analysis

① Test a company's statement that it “raised prices” in five steps

1. List price: By how much did the published or sticker price increase?
2. Realized price: How much did actual ASP rise after discounts, rebates, and coupons?
3. Volume: How did shipments, customer count, and renewal rates change after the increase?
4. Margins: Did gross and operating margins hold or improve?
5. Cash: Did OCF and FCF improve, or was cash trapped in inventory and receivables?

Do not conclude that a company has pricing power based solely on a list-price increase.

② Decompose revenue growth into price, volume, mix, and FX

Look for the following terms in filings and earnings materials:

• Price / pricing: price effect
• Volume / units / shipments: volume effect
• Mix: change in the share of high-priced or high-margin products
• Foreign exchange: FX effect
• Acquisition / divestiture: acquisition or disposal effect

For example, if revenue rises 8% through price +10%, volume −6%, product mix +2%, and FX +2%, final demand may be weak. By contrast, price +3%, volume +6%, mix +1%, and FX −2% may indicate relatively resilient real demand.

The effects may not add up exactly because of interaction terms. Review the company's disclosed methodology and cross-effects.

③ Evidence of pricing power differs by industry

④ Select a price measure close to the company, not merely the headline CPI

An overall CPI of 3% does not mean every company's prices and costs changed by 3%.

• Semiconductor company: memory and foundry prices; wafer, electricity, equipment, and FX costs
• Airline: jet fuel, exchange rates, fares, and load factor
• Food company: grains, oils, sugar, packaging, and selling prices
• Construction company: rebar, cement, labor, and construction-price adjustment clauses
• Software company: labor, cloud costs, price per seat, and renewal rates
• Retailer: purchase costs, promotional spending, traffic, average ticket, and inventory turnover

Find the detailed index closest to the company's products and cost structure.

⑤ Check the lag and contract structure of price increases

If costs rise before selling prices, short-term margins can deteriorate. Conversely, if costs fall while selling prices adjust slowly, margins can temporarily widen.

Check:

• Frequency of price renegotiation
• Share of fixed-price and variable-price contracts
• Commodity and FX pass-through clauses
• Time from order intake to revenue recognition
• Inventory holding period and lag in cost recognition
• Competitors' price increases and discounts
• Timing of regulatory tariff approvals

⑥ Separate nominal growth from real growth

Removing the price effect for the relevant product from nominal revenue growth helps reveal the direction of volume and real demand.

\[ Real\ revenue\ growth \approx Nominal\ revenue\ growth-Realized\ price\ growth \]

This is a simple approximation. Precise analysis must separate volume, mix, FX, and acquisition effects, and it is better to use the company's realized product prices than the headline CPI.

⑦ Connect pricing power to valuation

A company with strong pricing power is more likely to protect profit and FCF in an inflationary environment, but that expectation may already be embedded in a high PER or EV/EBITDA multiple.

Separate two questions:

1. Is it a good company? — durability of pricing power, margins, ROIC, and FCF
2. Is it a good price? — the growth and margin expectations and discount rate embedded in the current share price

Strong pricing power does not make a company a good investment at any price.

⑧ Normalize temporary inflation-related profit

During a commodity-price increase, a company holding low-cost inventory may earn a temporary inventory profit if selling prices rise first. Conversely, when commodity prices fall sharply, high-cost inventory can cause valuation losses or margin pressure.

When calculating normalized profit, review:

• Inventory valuation method and holding period
• Temporary inventory valuation gains and losses
• Commodity hedging gains and losses
• Normal sales volume before and after price increases
• Normal promotional and logistics costs
• Margins in periods when both costs and selling prices were stable

6. What to Find in Disclosures

Inflation data: find it outside company filings

Record the following metadata from official statistics:

• Release date and reference period
• Index base year
• Unadjusted or seasonally adjusted series
• Whether the change is monthly, yearly, or annualized
• Headline or core index
• Preliminary or revised figure
• Aggregate index or detailed item index

Korean companies: DART

Financial Supervisory Service DART and company IR materials, check:

Some Korean companies do not separately present gross profit in the income statement. If revenue and cost of sales are available, calculate it directly using the same consolidated basis and reporting period.

U.S. companies: 10-K and 10-Q

SEC EDGAR, check:

• 10-K Item 1: products, pricing structure, customers, and competitive environment
• 10-K Item 1A: risks from inflation, commodities, FX, labor costs, and demand elasticity
• 10-K Item 7 / 10-Q Part I, Item 2 — MD&A: decomposition of revenue into price, volume, mix, and FX, and causes of margin changes
• Revenue and segment notes: changes in revenue by product, geography, and business segment
• Cost of sales / Cost of revenue: cost of sales and gross margin
• Inventories: inventory composition, valuation method, and write-downs
• Accounts receivable and contract assets: receivables and collection periods after price increases
• Derivatives and market risk: commodity and FX hedges and sensitivities
• Contract liabilities·RPO·backlog: prices in long-term contracts and future revenue recognition
• Earnings release·conference call: management's explanation of price, volume, mix, and cost effects

A company's Adjusted gross margin or Organic sales may be a non-GAAP measure. Review its adjustments and calculation, and reconcile it to GAAP or IFRS figures.

7. Key Takeaways

• A high price level and a high inflation rate are different. Slower inflation does not itself mean that prices declined.
• The CPI measures prices consumers pay for a representative basket of goods and services; the PPI measures selling prices received by domestic producers; and the GDP deflator measures prices across domestic final output.
• The CPI, PPI, and GDP deflator can move differently because their coverage, treatment of imports, and weights differ.
• The PPI is not a specific company's cost inflation, and the magnitude and timing of PPI-to-CPI pass-through depend on contracts, competition, and demand.
• Pricing power is not the act of raising prices; it is the ability to preserve realized prices, volume, market share, gross margin, and OCF together.
• Nominal revenue growth must be decomposed into price, volume, mix, FX, and acquisition effects.
• If prices rise more slowly than costs, gross margin and operating profit can decline even as revenue grows.
• Inflation can increase the value of inventory and receivables and pressure OCF before it pressures net income.
• Even a good company with strong pricing power may not be a good investment if that expectation is excessively reflected in its share price.

8. Three Review Questions

Question 1

Choose the price index that most closely matches each description.

1. Price changes in representative goods and services purchased by households
2. Changes in prices domestic producers receive for selling output
3. Price changes across final goods and services produced domestically

Choices: CPI, PPI, GDP deflator

Question 2

Fictional Company C sold 2 million units in the prior year at a realized price of KRW 50 per unit and a unit cost of KRW 35. In the current year, unit cost rose to KRW 40, the company raised price to KRW 60, and volume declined to 1.9 million units.

1. Calculate prior-year and current-year revenue.
2. Calculate prior-year and current-year gross margin.
3. Explain whether the company demonstrated pricing power.

Question 3

A company's revenue rose 9% year over year, but volume fell 7% and gross margin declined from 32% to 27%. At the same time, inventory rose 25% and accounts receivable rose 18%, causing OCF to decline. Explain why the company should not immediately be classified as an inflation beneficiary and what else should be checked.

Answers and Explanations

1

1. Consumer prices paid by households → CPI
2. Output prices received by domestic producers → PPI
3. Prices across domestic final output → GDP deflator

Because the three measures cover different things, their inflation rates can differ in the same period.

2

Prior-year revenue is:

\[ 200\times50=10{,}000 \]

Current-year revenue is:

\[ 190\times60=11{,}400 \]

Prior-year gross margin is:

\[ \frac{50-35}{50}\times100 =30\% \]

Current-year gross margin is:

\[ \frac{60-40}{60}\times100 =33.33\% \]

Volume fell 5%, but realized price rose 20%, revenue rose 14%, and gross margin improved from 30% to 33.33%. All else equal, the price increase exceeded cost inflation while the volume decline remained limited, so the company demonstrated pricing power. Market share, promotional spending, customer churn, and OCF should still be checked.

3

The revenue increase may have come from price increases, but volume fell 7% and gross margin declined by 5 percentage points. This suggests that price increases may not have fully offset higher costs, that demand weakened after price increases, or that the share of lower-margin products increased.

Higher inventory and receivables may mean that cash is trapped in stock and credit sales. Check:

• Drivers of revenue growth by price, volume, mix, and FX
• Actual ASP after discounts and rebates
• Market share, customer count, renewal rate, and churn
• Cost increases by raw materials, labor, and logistics
• Inventory quantity, unit cost, days inventory, and valuation losses
• Receivables collection period and allowance for credit losses
• Changes in OCF, FCF, and promotional spending after the price increase
• Competitors' pricing and demand changes

Next lesson — Day 26:
“Why Do Inflation Shocks Move Interest Rates and Stock Prices Together? — Inflation Expectations, Real Rates, and the Central-Bank Reaction Function”