What Is PMI and How Does It Affect Financial Markets?

The Purchasing Managers’ Index will be one of this week’s most closely watched economic indicators. Preliminary September US Manufacturing, Services and Composite PMIs are scheduled for September 23, followed by new home sales and durable goods orders later in the week. After the Federal Reserve’s recent interest-rate increase, these reports could help markets assess whether the economy is maintaining momentum or beginning to slow.

But what is PMI, and why does it move financial markets? This guide explains the PMI meaning, how the index is calculated and the potential PMI impact on stocks, forex, bonds and commodities.

Key Takeaways

• PMI stands for Purchasing Managers’ Index and measures whether business activity is expanding or contracting.
• A reading above 50 normally indicates expansion, below 50 signals contraction and exactly 50 suggests no change.
• Manufacturing PMI focuses on physical production and supply chains, while services PMI covers service-sector business activity.
• The trend and difference from market forecasts may matter more than whether the headline figure is simply above or below 50.
• A high PMI can support growth-sensitive markets but may also increase inflation and interest-rate expectations.
• PMI releases can influence stocks, currencies, bond yields and commodities by changing the economic outlook.

What Is PMI?

PMI stands for Purchasing Managers’ Index. It is a monthly survey-based economic indicator designed to show whether activity in a particular sector is improving, remaining unchanged or deteriorating compared with the previous month.

Purchasing managers are useful sources of economic information because they make decisions involving new orders, raw materials, production, staffing, supplier contracts and inventories. A change in these activities may appear before the same trend becomes visible in official GDP, employment or industrial-production data.

PMI is therefore commonly described as a leading indicator. It is also released more quickly than many government statistics, giving economists, businesses and traders a relatively early view of current economic conditions.

There is no single worldwide PMI report. Different organisations produce surveys for individual countries, regions and sectors:

• S&P Global publishes manufacturing, services and composite PMIs covering many major economies.
• The Institute for Supply Management produces the closely followed US ISM Manufacturing and Services PMIs.
• SIPMM publishes Singapore’s official Manufacturing PMI.
• Other industry groups and research organisations compile country-specific surveys.

The S&P Global and ISM surveys are separate reports. They use different panels, questions and methodologies, so their results do not always move in the same direction. S&P Global also publishes preliminary or “flash” estimates during the current month, while ISM releases its US Manufacturing and Services PMIs early in the following month.

PMI does not measure the total monetary value of economic output. Instead, it shows the direction and breadth of monthly changes reported by participating businesses. This distinction is important when comparing PMI with GDP.

How Is PMI Calculated and What Does the Number Mean?

PMI is a diffusion index. Survey participants are generally asked whether conditions have improved, remained unchanged or deteriorated since the previous month.

A basic diffusion index can be represented as:

PMI = Percentage reporting improvement + 0.5 × percentage reporting no change

Suppose 40% of respondents report an improvement, 40% report no change and 20% report deterioration. The calculation would be 40 plus half of 40, producing an index reading of 60.

This methodology measures the direction and breadth of a change rather than its exact size. A company reporting a slight increase in new orders and one reporting a substantial increase may both be counted as “improved.”

A reading of 50 is commonly called the dividing line between expansion and contraction. The further the index moves above or below that level, the more widespread the reported improvement or deterioration.

However, traders should not use 50 as the only reference point. Four comparisons are particularly important:

1. The actual result.
2. The consensus forecast.
3. The previous reading.
4. The underlying components.

A PMI of 52 indicates expansion, but it could still produce a negative market reaction if analysts expected 55 or if the index fell sharply from 57. Conversely, a reading of 49 may be welcomed if it rises from 45 and suggests that a downturn is becoming less severe.

Methodologies also differ. S&P Global manufacturing surveys typically place substantial weight on new orders, output and employment. The ISM Manufacturing PMI uses its own composite methodology, so identical business conditions do not necessarily result in identical readings.

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Manufacturing PMI, Services PMI and Composite PMI Explained

The word “PMI” may refer to several reports. Before interpreting a release, investors should identify the sector, country, provider and whether the figure is preliminary or final.

What Is Manufacturing PMI?

Manufacturing PMI measures changes in activity among businesses that produce physical goods. It provides information about factories, supply chains, inventories and industrial demand.

Its principal components normally include:

• New orders.
• Production or output.
• Employment.
• Supplier delivery times.
• Inventories or stocks of purchases.

New orders are closely watched because today’s orders may become tomorrow’s production. A sustained increase can suggest that factories will need more labour, materials and capacity.

Output indicates whether manufacturers are increasing or reducing production. Employment offers an early view of hiring conditions, while inventories show whether companies are preparing for stronger demand or accumulating unwanted stock.

Supplier delivery times require careful interpretation. Slower deliveries can occur when demand is strong and suppliers are struggling to keep up. They can also reflect port closures, material shortages, tariffs or geopolitical disruption. Traders should therefore examine why deliveries have changed rather than treating delays as automatically positive.

Manufacturing PMI can be especially relevant to industrial stocks, transportation companies, exporters and commodities such as oil, copper and steel.

What Is Services PMI?

Services PMI measures activity in non-manufacturing industries. Depending on the survey, these can include finance, transport, communications, hospitality, information technology and professional services.

Services represent a large share of output and employment in developed economies. Services PMI can therefore provide a broader picture of domestic demand than manufacturing data alone.

Important components include:

• Business activity.
• New business.
• Employment.
• Input costs.
• Prices charged.
• Business expectations.

The prices and employment components can be particularly important for monetary policy. Service businesses are often labour-intensive, and persistent wage or selling-price pressures may indicate that inflation is becoming harder to control.

A strong services PMI may therefore send two signals. It can indicate resilient consumer and business demand, but it may also give a central bank less reason to lower interest rates.

What Is Composite PMI?

Composite PMI combines manufacturing output and services activity into a broader measure of private-sector performance.

It is not necessarily a simple average of the two headline PMIs. Its components are weighted to reflect the relative economic importance of manufacturing and services.

Composite PMI is useful when the sectors are moving in different directions. An economy could have contracting factory output but sufficiently strong services activity to remain in overall expansion.

Because services account for a large proportion of many developed economies, the services component often has a greater influence on the composite result. Manufacturing may still have an outsized effect on trade, industrial companies and commodity markets.

>> Read more: How Do Tariffs Affect the Stock Market? US–China Trade Explained

Is a High PMI Good or Bad?

A high PMI is generally positive for economic growth, but it is not automatically bullish for every financial market.

An improving PMI may indicate:

• Stronger demand and company revenue.
• Rising production and business investment.
• Expanding employment.
• Improving consumer spending.
• Continued economic growth.

These conditions can benefit industrial, financial, energy and consumer shares. They may also support a country’s currency by improving growth expectations.

However, a high PMI can create negative consequences when an economy is already experiencing inflation. Strong demand may allow businesses to raise prices, while shortages can increase input costs. Central banks may respond by keeping interest rates higher or tightening policy further.

Higher interest-rate expectations can lift bond yields, place pressure on bond prices and reduce the relative appeal of expensive growth stocks. Companies can also report strong activity while experiencing weaker margins if their costs are rising faster than selling prices.

Consider two examples:

• A PMI rising from 48 to 51 signals a transition from contraction to expansion. Markets may treat that as encouraging.
• A PMI increasing from 57 to 60 shows faster growth, but investors may worry about overheating, inflation and additional interest-rate increases.

A lower PMI is not always immediately bearish either. Weak economic data can increase expectations of rate cuts, sometimes supporting government bonds and rate-sensitive equities.

The answer to is high PMI good or bad therefore depends on the economic cycle, inflation, monetary policy, market expectations and the details inside the report.

How Does PMI Affect Financial Markets?

PMI can move markets because it influences expectations for GDP, employment, inflation, corporate earnings and interest rates. The effect is usually strongest when the reported number differs materially from the consensus forecast.

PMI Impact on Stocks

The PMI impact on stocks depends on whether investors are primarily focused on growth, inflation or interest rates.

A stronger-than-expected PMI may support industrial, transportation, banking, energy and consumer shares because it suggests improving demand. Rising new orders can lead analysts to raise revenue and earnings estimates for companies exposed to the relevant sector.

Weak PMI data can produce the opposite reaction. Declining orders, production and employment may indicate that businesses are reducing investment and consumers are becoming more cautious.

The prices components also matter. If input costs increase rapidly, companies with limited pricing power may face margin pressure even when business activity is expanding.

Technology and other growth stocks can react differently from cyclical sectors. A very strong PMI may push bond yields higher if investors expect tighter monetary policy. Higher yields increase the discount rate applied to future earnings, which can weigh on richly valued shares.

This explains why positive economic data can sometimes coincide with a stock-market decline. The economic signal may be constructive, but its implications for interest rates may be less favourable.

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PMI Impact on Forex

The PMI impact on forex is transmitted mainly through relative growth and interest-rate expectations.

A stronger-than-forecast US PMI may support the dollar if traders conclude that the American economy is outperforming or that the Federal Reserve will maintain higher rates. A weaker report may pressure the dollar by increasing expectations of slower growth or future policy easing.

The same principle applies to other currencies. Strong UK data may support sterling, while an improving eurozone PMI may benefit the euro.

Forex traders should compare economies rather than looking at one PMI in isolation. EUR/USD may depend on whether US activity is improving more quickly than eurozone activity. Both regions can report readings above 50 while their currencies move in opposite directions.

The market’s reaction can also be affected by risk sentiment, geopolitical events and other data released at the same time. A currency does not have to appreciate merely because its PMI exceeded 50.

PMI Impact on Bonds

Strong PMI data can push government bond yields higher when it implies faster growth, stronger inflation or tighter monetary policy. Bond prices generally fall when yields rise.

Weak PMI data can lower yields if it increases expectations of interest-rate cuts or a slowdown. However, the response may be more complicated when weakness is accompanied by high prices.

For example, falling output combined with rising input costs could point towards stagflation. In that scenario, central banks face the difficult task of managing inflation while economic activity deteriorates.

PMI Impact on Commodities

Manufacturing PMI can affect expectations for energy and industrial-metal demand. Expanding factory activity may imply greater consumption of oil, copper, aluminium and steel, while contraction may reduce demand forecasts.

China’s manufacturing PMI can be particularly influential because of the country’s role in global manufacturing and commodity consumption.

Gold reacts more indirectly. PMI can affect the US dollar, bond yields and expectations for central-bank policy, all of which can influence gold prices.

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What Should Traders Watch in This Week’s US Economic Data?

The preliminary September US PMI reports are scheduled for Wednesday, September 23. Housing, employment and manufacturing data will then provide additional information about the economy.

Release times and consensus forecasts may change.

The preliminary Manufacturing PMI is expected to ease to approximately 53.5 from 53.9. Services PMI is forecast near 56.0, compared with 56.5 previously, while the previous Composite PMI reading was 56.0.

These estimates suggest that private-sector activity may continue expanding, although at a slightly slower rate. Investors will also examine input prices and employment for evidence that strong demand is sustaining inflation.

New home sales are expected to recover to an annualised rate near 650,000 from 607,000. This report will indicate how housing demand is responding to mortgage rates and affordability pressures.

Headline durable goods orders are expected to decline by approximately 0.9% after rising 1.1% in July. Because aircraft and defence orders can be volatile, traders should also examine the readings excluding transportation and defence. July orders excluding transportation increased by 0.4%, according to the US Census Bureau.

The releases should be interpreted together. Strong PMI and durable goods data would indicate resilient business demand. Strong services activity accompanied by weak manufacturing could reveal an increasingly uneven economy. High PMI price readings could reinforce inflation concerns, while broad weakness across PMI, housing and durable goods might raise fears of a slowdown.

How Can Traders Prepare for PMI Releases With CFDs?

CFDs allow traders to speculate on the price of an underlying market without owning the asset. A buy position can be used when expecting the price to rise, while a sell position can be used when anticipating a decline.

This flexibility can be useful around PMI releases because the data may influence forex pairs, indices, shares, commodities and bonds in different directions. However, CFDs use leverage, meaning both potential gains and losses are magnified. Spreads can also widen and prices can move rapidly around important announcements.

Markets.com provides CFDs across multiple asset classes through WebTrader, its mobile app, MT4 and MT5, depending on jurisdiction. Traders can also use its economic calendar, live charts, indicators, price alerts, Trading Central insights and trading calculators.

Step 1: Check the Economic Calendar

Confirm the release time, previous reading and consensus estimate. Check whether the report is preliminary, final, S&P Global or ISM.

Step 2: Choose the Relevant Market

Select the currency pair, index, share or commodity most closely connected to the economy and sector covered by the PMI.

Step 3: Prepare Several Scenarios

Plan for a result above consensus, close to expectations or below forecast. Also consider the possibility that manufacturing and services move in opposite directions.

Step 4: Review the Sub-Indices

Examine new orders, employment, output and prices. The headline may indicate expansion while weaker orders warn that future activity could slow.

Step 5: Choose Buy or Sell

Select Buy if the analysis suggests the chosen market may rise or Sell if it may fall. Stronger data does not automatically mean higher asset prices because interest-rate expectations can reverse the reaction.

Step 6: Set Position Size and Risk Controls

Choose a position size consistent with your risk tolerance and consider stop-loss and take-profit instructions. Allow for wider spreads, slippage and abrupt price reversals.

Step 7: Monitor the Wider Reaction

Compare the initial market move with bond yields, currency performance and changes in rate expectations. The first reaction may not continue once traders analyse the full report.

CFDs are leveraged products and can cause rapid losses. Trading conditions, leverage and instrument availability vary by jurisdiction and the applicable Markets.com entity.

>> Learn more: Is Gold a Good Hedge Against Inflation?

Final Thoughts

The basic PMI meaning is straightforward: a reading above 50 indicates expansion, while a figure below 50 indicates contraction. Interpreting its market effect requires more context.

Manufacturing, services and composite PMIs measure different parts of the economy. The surprise relative to forecasts, the direction of the trend and the underlying components can be more important than the headline level alone.

High PMI is normally positive for growth, but it may pressure bonds, currencies or growth stocks if it strengthens inflation and interest-rate expectations. PMI is therefore most useful when considered alongside employment, housing, durable goods, inflation and central-bank policy.

>> You may also like: Fed Rate Hike Impact on Gold: What Happens When Interest Rates Rise or Fall?

FAQs

How Does PMI Affect the Market?

PMI affects markets by changing expectations for economic growth, inflation, company earnings and interest rates. The largest moves often occur when the actual result differs significantly from the consensus forecast.

What Is PMI in Financial Markets?

PMI is a monthly survey-based indicator that measures whether activity in manufacturing, services or the broader private sector is expanding, unchanged or contracting.

Is PMI Bullish or Bearish?

PMI is not automatically bullish or bearish. Strong data can support cyclical assets but may pressure markets if it raises inflation and interest-rate expectations. Weak PMI can hurt growth expectations while supporting bonds.

Is a Higher PMI Good or Bad?

A higher PMI generally indicates improving business activity. However, an unusually strong result can be negative for bonds or growth shares if it suggests persistent inflation and tighter monetary policy.

What Is the Difference Between PMI and GDP?

PMI is a timely survey showing the monthly direction of business activity. GDP measures the monetary value of economic output and is published less frequently with a longer delay.

What Is the Difference Between S&P Global PMI and ISM PMI?

Both measure business conditions, but they use different company panels, survey methodologies and component weightings. Their readings can therefore differ even when they cover the same country and sector.

How Often Is PMI Released?

Most PMI reports are released monthly. S&P Global often publishes a preliminary flash estimate followed by a final result. US ISM Manufacturing and Services reports are normally released on the first and third business days of the month.

Sources

• Investopedia: Understanding the Purchasing Managers’ Index
• SIPMM: What Is PMI and Why Is It Important?
• IG: What Is the PMI and Why Is It Important for Traders?
• FOREX.com: What Is the PMI?
• S&P Global: PMI Release Calendar
• Institute for Supply Management: PMI Reports