Why Markets Move Before Economic Data Is Released

Why markets move before economic data is released: what 'priced in' actually means, what the consensus forecast is, why the surprise moves the price and not the number, and what this changes about holding a position into a release.

An inflation report is due at 13:30 UTC. By noon the dollar has already fallen half a percent, and nothing has been published. This is not a leak. It is what markets do: they trade expectations about information, and those expectations exist long before the information does.

Key Takeaways

A price already contains the market's best guess about the next release. The release settles a bet that was placed days earlier.
What moves the price is the gap between the actual number and the expected one — the surprise, not the figure.
"Consensus" is the published median forecast. It is the benchmark the actual is judged against.
Positions held through a release are exposed from the moment the market starts pricing it, not from the release time.

A Price Is a Forecast

A price is where buyers and sellers currently disagree about the future. It already reflects everyone's view of next Thursday's employment report. So by the time the number arrives, the market has been positioned for a version of it for days, and the release does not so much deliver new information as confirm or contradict a position already taken.

This produces the rule that confuses newcomers most: the same number can be good news or bad news depending on what was expected. A 4.2% inflation print against a 4.5% forecast is a downside surprise, and the currency tends to weaken on softer rate expectations. The same 4.2% against a 3.9% forecast is an upside surprise, and the currency tends to strengthen. Identical figure, opposite reaction.

The Consensus Forecast

Data providers survey economists ahead of each release and publish the median. That is the "forecast" column on the economic calendar — see how to use an economic calendar — and it is the reference point.

Three things worth knowing. It is a median, not a range: a tight cluster of forecasts makes a small miss a shock, a wide spread makes the same miss unremarkable. It moves: related data during the week revises it. And the market's own expectation is not always the published one — traders sometimes lean away from consensus, which is why an in-line print can still move the price sharply.

Why the Move Starts Early

Related data lands first. Before a US employment report, the market sees jobless claims, private payroll estimates and survey employment components. Each one narrows the plausible range.
Positioning takes time. Large participants cannot build size in the last minute without moving the price against themselves. They build over days; that building is the pre-release drift.
Liquidity thins. In the final hour, market makers widen spreads and reduce size. The same order moves the price further. See volatility and liquidity.
Officials speak. Central bank comments shift expectations on a schedule of their own.

"Buy the Rumour, Sell the Fact"

If a currency rallies for a week on expectations of a strong report and the report arrives strong exactly as expected, the reason to hold the position has been used up. Traders who bought the anticipation take profit, and the currency falls on good news. Nothing irrational happened; the good news was already in the price. Why good economic news can cause markets to fall covers the wider version.

Worked Example: A Rate Decision

The market expects a 25 basis point hike, a week out.

Moment	What happens
Days before	Currency drifts higher as traders position. Most of the move is here
Decision: 25bp delivered	Little reaction. Already priced
Statement two minutes later: "likely the final increase"	Currency falls sharply — on a rate rise

The decision was known; the guidance was not. In modern central banking the statement moves markets more than the rate itself, for exactly this reason. See how interest rates work.

What It Changes About Holding a Position

The risk window opens when the market starts pricing the release, not at 13:30.
In-line does not mean no move. The detail beneath the headline, or positioning away from consensus, can move it.
Around the release, spreads widen and slippage rises. A stop-loss is subject to both. See gap risk.
The only control is position size. You cannot forecast the surprise; you can decide what it is allowed to cost.

If data is priced in, why does the release move anything?

Because the pricing is probabilistic. The market assigns odds to a range of outcomes; the release collapses that range to one, and everything priced on the other outcomes unwinds.

What does "priced in" mean?

That the current price already reflects an expected outcome. If the outcome arrives as expected, there is no new information and little reaction.

Why did the market fall on a strong number?

Usually one of three: it was strong but weaker than expected; the detail beneath the headline was weak; or the good news was already priced and positions were closed on the release.

Does this apply to company earnings?

Yes, identically. Record profits below analysts' expectations produce a falling share. See what is an earnings report.

Should I close positions before major data?

That is a size decision, not a rule. What matters is that holding through a release is a deliberate choice at a size chosen for it.

Put this into practice

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