What it means
Second-round inflation effects happen when inflation does not stay confined to the original source of the shock. For example, oil or food prices may rise first, but the more important market question is whether that pressure then spreads into transport costs, wages, services, rents, and other everyday prices. When that happens, inflation starts to look broader and more persistent rather than temporary or isolated.
Why it matters in live markets
Second-round inflation effects matter because central banks are usually more concerned when inflation spreads beyond one volatile category. A rise in oil prices on its own may be treated as a headline shock. But if that same shock starts influencing core inflation, wage expectations, and broader pricing behaviour, markets may decide that the inflation problem is becoming harder to reverse. That can affect the US Dollar Index (DXY), bond yields, central-bank expectations, and wider risk sentiment.
Key points
- Second-round inflation effects begin with an initial price shock, often in energy or food.
- The key issue is whether that shock spreads into wider parts of the economy.
- They matter because broader inflation is usually more difficult for central banks to ignore.
- Markets often watch for these effects through wages, services inflation, and Personal Consumption Expenditures (PCE) or CPI data.
- They are one reason why falling oil prices do not always mean inflation risk has disappeared.
Example
If oil prices jump because of supply disruption, headline inflation may rise quickly. If transport costs, wage demands, and service-sector pricing then rise as well, markets may say second-round inflation effects are starting to appear.
Related glossary terms
Inflation, Core Inflation, Personal Consumption Expenditures (PCE), Federal Reserve, Yield, Volatility, Risk sentiment
Where you will see it
You will usually see second-round inflation effects discussed in central-bank previews, inflation articles, week-ahead notes, and macro commentary. It is especially common when markets are trying to decide whether an energy shock is fading on its own or becoming a broader inflation problem.