Overview
Event risk refers to the uncertainty around outcomes that can move markets quickly. Some events are scheduled, such as CPI, GDP, jobs data, and central bank decisions. Other events are unscheduled, such as geopolitical developments, surprise policy comments, or sudden market shocks.
Event risk matters because it can change volatility, liquidity, spreads, and the probability of slippage.
What it means in practice
Ahead of an event, markets often price expectations. When the result differs from expectations, the market can reprice rapidly. That repricing can be amplified by positioning, thin market depth, and automated flows.
Event risk is not limited to “big” events. Smaller releases can trigger movement if positioning is crowded or if the market is already fragile.
Why it matters in live markets
During event windows, spreads can widen and execution conditions can change quickly. Stops are more exposed to slippage, and markets can gap through levels. Understanding event risk helps you interpret sudden spread widening and fast moves more accurately.
Event risk can also reshape correlations temporarily, especially during risk-off shocks where multiple markets move together.
Key points
- Event risk includes scheduled releases and unexpected headlines.
- Market reaction often depends on surprise versus expectations.
- Liquidity can thin during event windows, increasing slippage risk.
- Positioning can amplify moves after results are released.
Example
A central bank statement sounds more restrictive than expected. Yields jump, the currency strengthens, equities weaken, and volatility rises. Even if the policy rate was unchanged, the change in expectations drives a rapid repricing.
Related glossary terms
Volatility, Liquidity, Slippage, Spreads, Stop Orders, Gapping, Sentiment, Credit Spreads