Data surprise in gold trading
A data surprise is the gap between an economic release and the consensus forecast; gold reacts to the surprise, not to whether the number is high or low.
Also called Consensus forecast, Actual vs forecast, Beat and miss, Economic surprise
A data surprise is the difference between the actual value of an economic release and the consensus forecast published beforehand. A result above consensus is a beat; below is a miss. Markets have already priced the consensus, so only the surprise is new information.
How it applies to gold trading
A CPI reading of 3% can be bullish or bearish for gold depending on what was expected. If consensus was 3.2%, a 3.0% print is a soft surprise that can lower yields and lift gold. If consensus was 2.8%, the same 3.0% is hot and can push gold lower. Revisions to previous months and the detail inside the report, such as core versus headline, can override the headline surprise.
Size matters relative to the usual spread of forecasts. A miss of 0.1 percentage points on core CPI is meaningful; the same miss on a noisy indicator may be ignored.
Worked example
Example (hypothetical numbers): NFP consensus is 150,000. The report shows 210,000, but the previous two months are revised down by 90,000 combined. Gold first drops from 4,010 to 3,998 on the headline beat, then rises to 4,020 as traders digest the revisions.
A common mistake
Reacting to the first headline in the first second. Check consensus, revisions and the core figures before deciding what the surprise really was.
See also: Economic calendar, CPI, NFP, News spike.
Frequently asked questions
Why did gold fall on good news?
Probably because the number was better than expected, which raised rate expectations and yields, or because revisions and details changed the picture.
Where do I find the consensus forecast?
Economic calendars list the consensus next to each release, compiled from economists’ estimates.
How big does a surprise need to be to move gold?
It depends on the indicator. A 0.1 point miss on core CPI is significant; payrolls usually need a miss of tens of thousands of jobs. The market’s attention on the indicator at the time also matters.