Why Markets React to Data

Introduction

Economic data can move markets because new information can change what traders expect about the economy and the future. Inflation, employment, growth and interest-rate expectations can all influence prices.

For a trader, the important point is that the market does not look only at whether a number is high or low. It also compares the new number with what was expected before the release.

A scheduled data release is therefore something to be aware of, especially when holding a position.

What Does an Economic Release Tell Us?

Economic releases provide information about a part of the economy. Examples include inflation, employment, economic growth and interest-rate decisions.

One release rarely explains everything about the market. It is one new piece of information that traders add to the information they already have.

The market can therefore react when the new information changes expectations.

Actual, Expected and Previous

When reading an economic calendar, three values are especially useful:

• Previous: the earlier published value.
• Expected: what the market or analysts expected.
• Actual: the newly published value.

The difference between Actual and Expected is often more important than the Actual number alone.

For example, an inflation reading of 3% can be higher than expected in one situation and lower than expected in another.

Why Do Expectations Matter?

Imagine that the market expects a certain economic result and the release confirms it. The price may move only a little because the information was already expected.

Now imagine the result is very different from expectations. The market has to adjust to new information, so the price reaction can be larger.

This is one reason why the same Actual value can lead to different market reactions at different times.

Inflation and Interest Rates

Inflation is closely watched because it can influence expectations about interest rates.

If inflation is higher than expected, traders may expect interest rates to remain higher for longer. If inflation is lower than expected, expectations can move in the opposite direction.

This does not mean that every higher inflation reading automatically makes every stock fall. The reaction depends on the asset and the wider market context.

Employment Data

Employment data gives information about the strength of the labor market. Important releases can include job creation, unemployment and wage growth.

A strong labor market can support economic activity, but strong employment and wage growth can also influence inflation and interest-rate expectations.

The trader therefore looks at the whole information package rather than one headline number.

Economic Calendar

An Economic Calendar shows when important economic releases are scheduled.

Before a release, check:
• what data is coming,
• when it will be released,
• what the Expected value is,
• what the Previous value was,
• whether the event can affect the instrument you trade.

The calendar is mainly a preparation tool. It helps you know when a potentially important information event is approaching.

Why Can Volatility Increase?

When important data is released, many market participants receive new information at almost the same time.

Prices can therefore move quickly. Spreads may widen, orders may receive worse fills than expected, and stops can be affected by rapid price movement.

This is important even if you are not trading the news itself. A position that was opened earlier can still be exposed to the event.

Trader Preparation

Before an important scheduled release:

• Know the release time.
• Check the Expected and Previous values.
• Know whether your strategy allows trading around the event.
• Consider the additional volatility and execution risk.
• Decide in advance what you will do with an open position.

The key is to make the decision before the market becomes fast and emotional.

Example

A trader has a planned breakout trade in an index. A major economic release is scheduled shortly before the expected entry.

Instead of trying to guess the number, the trader records the event, checks the consensus expectation and decides whether the strategy permits a trade around the release.

After the release, the trader observes how price reacts. The data is treated as context for the trading thesis, not as an automatic buy or sell command.

Common Mistakes

A common mistake is to treat a data release as automatically bullish or bearish.

Another mistake is to look only at the headline and ignore expectations, previous values or the wider market context.

It is also a mistake to make the decision during the fastest part of the move when the trader could have planned the response beforehand.

Key Terms

Economic Calendar, Actual, Expected, Previous, inflation, interest rates, employment, volatility, market expectations

Knowledge Check

1. Why does the market compare an Actual value with the Expected value?
2. Why can an important economic release increase volatility?
3. What should a trader decide before a scheduled release instead of deciding during the price spike?