Most of the time, a stock or an index moves because of its own story: earnings, a product launch, a sector rotation, ordinary supply and demand. But some days, everything moves together, in the same direction, for reasons that have nothing to do with any single company. Those are macro days, and they deserve a place in how you think about open risk.
A handful of scheduled events sit behind most of these days: Federal Reserve interest rate decisions, US inflation data (CPI), the monthly jobs report (non-farm payrolls), and occasionally a geopolitical shock that arrives with no warning at all. The first three are on a public calendar months in advance. You don't need to guess when they're coming.
Why these events matter for spreads
NDX and SPX are index products, so they move on broad, market-wide forces more than any single-stock story. Rate decisions reprice how expensive money is across the whole economy. Inflation data shifts what the Fed is expected to do next. Jobs numbers do both. Each of these can trigger the kind of sharp, one-directional move covered in correlation risk and in the lesson on a trade moving against you fast: not a slow drift, but a repricing that happens inside a single session.
A defined-risk spread caps your loss by design, so a bad macro print doesn't put your account at unlimited risk the way a naked position could. But "defined risk" is not the same as "risk you don't need to think about." A spread open across a major data release still carries real event risk: bigger implied moves, wider bid-ask spreads around the print, and a genuine chance of landing at your max loss if the move goes hard against your strikes.
Knowing the calendar, not predicting it
The useful skill here isn't forecasting what the Fed will decide or what CPI will print. Nobody has a reliable edge on that, and trying to trade around a prediction is a different game from the risk-first approach this site teaches. The useful skill is simpler: knowing what's scheduled to happen during the life of a position you're about to open, so the exposure is a choice rather than a surprise.
That might mean opening a slightly smaller position heading into a week with a Fed meeting in it, choosing strikes with a bit more room, or simply going in aware that the position could swing harder than a quiet week would suggest. None of that requires knowing which way the news breaks, only that news is scheduled.
What this doesn't mean
- It doesn't mean avoiding every position that overlaps a data release. Plenty of traders hold through these events deliberately, sized appropriately.
- It doesn't mean the calendar tells you which way the market will move. It only tells you when volatility is more likely to show up.
- It doesn't mean geopolitical shocks are covered by this kind of planning. Those arrive with no calendar entry at all, which is exactly why defined risk and sensible position sizing matter every single day, not just on scheduled ones.