Definition and what the idea tries to do
Closing before news generally means reducing or closing an open position shortly before a scheduled news release, in order to limit exposure to potentially sudden price changes around that release. The core mechanic is simple: you aim to be out (or less exposed) when volatility may increase.
It helps to separate two parts:
- Stable mechanics: you can choose to close earlier than the event time, based on your own schedule and the rules of your trading venue.
- Variable conditions: how prices move around news depends on market liquidity, order execution quality, spreads, and how the release is interpreted.
How it works in practice
A typical workflow looks like this, using only assumptions you can verify for your own setup:
- Identify an event time (the scheduled release time) from a calendar.
- Choose a cut-off time earlier than the release, so you close before the expected volatility window.
- Place orders to exit, accepting that actual execution happens at prices determined by current order books.
Even if your cut-off time is correct, your exit outcome can differ because execution is not guaranteed at a single quote. If liquidity thins, orders may fill at worse prices than expected. If spreads widen, the effective cost of exiting rises. If your cut-off is too close to the event time, you may still face rapid changes before the position fully closes.
Limitations and failure modes
1) Timing uncertainty
The event time is not always the same as the time your market reacts. Markets can reprice before the stated release, and they can also react after it, especially if the release is revised, delayed, or interpreted differently than expected.
2) Execution quality and slippage
Closing is an action that must be executed. Near high-impact news, liquidity can drop and order books can move quickly. That increases the chance of slippage (filling at a less favorable price than intended) and of inconsistent partial fills.
3) Costs can dominate the result
Even when you reduce exposure, transaction costs still apply: spreads, commissions, and any additional charges from the trading venue. If the market is already moving, the “safe exit” can still be costly.
4) Gaps and non-linear moves
Large moves around news can be non-linear. A small delay in closing can matter disproportionately, because the price can jump between the moment you decide to exit and the moment your order actually fills.
5) “It worked before” does not transfer
Historical patterns around similar events may suggest that volatility often increases, but historical relationships do not establish future results. A release that surprises the market, for example, can produce behavior that differs from prior instances.
Verification and what to check next
To independently verify how “closing before news” applies to your situation, focus on factors you can observe and measure:
- Whether your venue’s execution during volatile periods shows higher slippage or wider spreads.
- How often price movement begins before the calendar’s event time for your instruments.
- Whether your chosen cut-off time reliably creates meaningful reduction in exposure, rather than just moving the loss.
If you want, compare two practical definitions you can test on your own logs: closing well before the event versus closing immediately before it. The limitation is that you may find the second approach offers less control than expected, because execution and liquidity can still deteriorate in the final moments.