Scheduled Versus Surprise News

Some news events sit on a calendar months in advance — a central bank meeting, a scheduled earnings release, a known regulatory decision date. Others arrive with zero warning — a surprise resignation, an accident, an unexpected geopolitical event. Both can move a position's price by the same amount, but they call for completely different preparation, and treating them as the same kind of problem misses most of the useful edge a desk can get from simply knowing the calendar.

For scheduled news, the entire value is in the preparation done before it happens: sizing the position with the event's typical volatility in mind, deciding in advance whether to hold through the release or reduce exposure ahead of it, and — for anything liquid enough — checking what the market is already pricing in through options-implied volatility, since a scheduled event that's already fully anticipated by the market often produces a smaller move than a naive reading of "big event coming" would suggest. None of this preparation is available for surprise news by definition, which is exactly why the two need separate playbooks: a desk that only has one playbook, built around scheduled events, will find it doesn't fit a surprise at all.

Worked example

A central bank rate decision is scheduled for 2:00pm, known for weeks. A desk checks the options market and sees implied volatility already elevated for that day, meaning a rate move within the range the market has priced is unlikely to cause an outsized surprise; a position can be held through with a size that accounts for the pre-known, elevated volatility, or the desk can choose to reduce exposure ahead of the print specifically because the risk is known and quantifiable in advance. Contrast that with an unscheduled headline at 11:30am that a key supplier has halted shipments with no warning — there was no elevated implied volatility pricing this in, no chance to size around it in advance, and the market's first reaction is largely uninformed guessing about magnitude. The right response here isn't "trade it the same way as the rate decision" — it's slower, more careful position sizing precisely because nothing about this event was priced in ahead of time, and the eventual size of the real impact is genuinely unknown for longer.

The practical discipline scheduled events reward is keeping and checking an events calendar for every position in the book, not just the ones the trader happens to remember, since it's exactly the overlooked scheduled event — a smaller subsidiary's earnings, a secondary regulatory filing deadline — that catches a desk off guard in a way that feels, wrongly, like a surprise.