Markets do not move on the number. They move on the gap between the number and what was already priced in. A release only matters to the extent that it surprises the consensus, which is why a strong print can sell off. The size of the move is set by the surprise, the liquidity and the positioning.
That one sentence resolves most of the confusion around data days. The rest of this page is the mechanism underneath it, and what it implies about how to behave when the clock hits the release time.
Only the surprise moves price
Before any scheduled release, economists publish forecasts and a consensus figure emerges. Traders position against that consensus. By the time the release arrives, the expected outcome is already in the price — that is what pricing in means.
So the tradeable quantity is not the figure. It is actual minus expected. An inflation print of 3.1 percent is bullish, bearish or irrelevant depending entirely on whether the market was looking for 3.4, 2.8 or 3.1. This is why two identical-looking numbers in consecutive months produce opposite reactions, and why reading the headline alone will never tell you which way price should go.
A second layer sits on top. The market also has a view on what the surprise means for policy. A hot labour report can be read as economic strength, which is good for earnings, or as pressure on a central bank to stay restrictive, which is bad for valuations. Which interpretation wins depends on what the market is currently worried about, and that changes over months. It is the reason the same data can have a different sign in different regimes, and the reason a stable rule like “strong jobs equals higher stocks” does not survive contact with a real year.
What actually happens in the ten minutes around a release
US macro data has a rhythm. The Bureau of Labor Statistics publishes the Employment Situation report at 8:30 a.m. on its scheduled dates; the Federal Reserve’s policy statement lands mid-afternoon on the second day of a scheduled meeting. Those times are published months in advance, which means every one of the steps below is predictable.
- T minus 15 to 30 minutes — liquidity starts leaving. Market makers do not want to be filled moments before a number they cannot see. Quotes widen, displayed size shrinks, and the book thins out. Your execution costs begin rising well before the event.
- T minus 1 minute — the book is at its emptiest. Spreads on even the most liquid instruments can be several times their normal width. Any order placed here pays for that.
- T zero to a few hundred milliseconds — the first repricing. Automated systems act on the headline figure. Because depth is minimal, the initial move is amplified far beyond what the surprise justifies. This is the candle retail traders see and chase.
- T plus 30 seconds to 5 minutes — the correction. Humans and slower systems read the internals: the revisions to previous months, the composition of the figure, the detail that contradicts the headline. This is where the overshoot often unwinds, sometimes violently.
- T plus 15 to 60 minutes — the actual trend. Liquidity returns, the spread normalises, and the market settles on a direction it is prepared to defend. This is the only part of the sequence with a book deep enough to trade properly.
The pattern generalises. The thinner the book, the larger the initial overshoot and the more complete the subsequent reversal — the same mechanic that produces a spike with no news, except here you know in advance exactly when it will happen.
Which releases move which market
| Release type | Primary market affected | Why it matters |
|---|---|---|
| Central bank rate decision and statement | Everything — index futures, currencies, bonds, metals | Sets the discount rate underneath every other asset. The largest scheduled mover on the calendar |
| Inflation data | Index futures, bonds, the domestic currency | Drives expectations of the next policy decision more than the current one |
| Labour market reports | Index futures, the domestic currency | Second-order policy input plus a direct read on demand |
| Growth and activity surveys | Index futures, cyclical sectors | Forward-looking, so a surprise can matter more than a backward-looking hard number |
| Energy and commodity inventories | The relevant commodity future and its equity sector | Narrow but violent within that one instrument |
| Foreign central banks | Currency pairs involving that currency | A pair has two sides, so two calendars — see how news moves forex pairs |
If you trade one instrument, the practical version of this table is short: find the three or four releases that actually move it, put them in your calendar, and treat everything else as background. Building that check into a repeatable pre-market routine takes about four minutes a day and removes almost all data-day surprises.
The scheduled-event effect most traders have never heard of
Anticipation of a release can matter more than the release. Researchers at the Federal Reserve Bank of New York documented what is now called the pre-FOMC announcement drift: in Staff Report 512, David Lucca and Emanuel Moench found that between September 1994 and March 2011 the S&P 500 rose by an average of 49 basis points in the 24 hours immediately before scheduled FOMC announcements — a return that did not revert in subsequent days, and which dwarfed excess returns outside that window.
Two cautions, because this is exactly the kind of statistic that gets misused. It is an average across a long historical sample, not a prediction about any single meeting, and later research has questioned whether the effect persists in more recent data and whether it is concentrated in meetings with press conferences. It is not a strategy and nothing here suggests trading it.
What it is good for is the principle: scheduled events shape behaviour before they occur. Positioning, hedging and risk reduction all happen in the run-up, which means the day before a major release frequently has its own character — quieter ranges, failed breakouts, moves that do not extend. If your setups keep failing on the Tuesday before a rate decision, that is not you losing your touch.
How to handle a release without trading it
Most consistent day traders do not trade the print. They trade around it, and the discipline is mostly subtraction:
- Know what is on the calendar before the session starts. Being surprised by a scheduled event is an avoidable, entirely self-inflicted loss.
- Be flat or be sized down into the release. A stop is a price at which you want out, not a price at which you are guaranteed out. Through a release, a stop is a market order into the thinnest book of the day — the mechanics are in slippage in trading.
- Let the first five minutes go. You are giving up the part of the move with the worst fills and the highest chance of reversal. That is a good trade in itself.
- Trade the level the market settles on, not the level it spiked to. Once depth returns, a release has usually produced a clean new reference price. That one is tradeable. The wick is not.
- Check your account rules. Many funded-account programmes restrict or prohibit holding through high-impact news, and breaching that can cost an evaluation regardless of the outcome — see prop firm news trading rules.
Frequently Asked Questions
Why does a good economic number sometimes cause a selloff?
Because the market had already priced in something better. Price reflects the consensus expectation before the release, so what moves it is the difference between the actual figure and that expectation. A strong number that is weaker than what was expected is, to the market, a disappointment.
Why does the spread widen right before a release?
Because the firms quoting the market do not want to be filled a fraction of a second before a number they cannot see. They widen their quotes and reduce the size they show, so depth thins out in the final minute. The cost of trading rises before the event, not after it.
Is the first move after a release the real move?
Often not. The initial reaction is driven by the headline figure in a book that has deliberately emptied itself, so it overshoots. Revisions to prior months, the internal components of the report, and other market participants repositioning all arrive in the minutes afterwards and frequently reverse it.
Which economic releases matter most to a day trader?
For US index futures and equities, the inflation and labour reports and the Federal Reserve policy decision dominate. For currencies, the central bank of each side of the pair matters most. Everything else usually produces noise that is indistinguishable from an ordinary intraday move within a few minutes.
Bottom line
An economic release is a scheduled repricing, and the only part of it that moves price is the distance between the number and the expectation. Everything around that is structure you can anticipate: liquidity drains out beforehand, the first move overshoots into an empty book, the internals and the revisions correct it, and a tradeable level appears once depth returns. Scheduled events also cast a shadow before they land — the New York Fed measured a 49 basis point average S&P 500 gain in the 24 hours ahead of FOMC announcements over 1994 to 2011, a reminder that positioning moves markets as much as news does. None of that requires you to trade the print. Knowing the calendar, sizing down into it and waiting for the level that survives is the whole edge for most people. Our FAQ covers how we handle data days in the room.