Stocks trade within market structures that include sessions, auctions, breaks and occasional interruptions. A Stock CFD references the movement of an underlying share, but the CFD has its own product schedule and provider controls. Reading both clocks is essential when news arrives outside normal trading.
Separate the two clocks
The underlying exchange publishes its session and auction timetable. RockGlobal publishes the hours and conditions for each Stock CFD. Those periods can overlap without being identical. Holidays, daylight-saving changes, local breaks and instrument settings can all change availability.
Use the current product schedule for the CFD and the official exchange calendar for market context. The interactive clock on the Stock CFD page is educational, not a promise of continuous execution.
What happens at the open
Opening auctions
Major exchanges use auctions to bring together buy and sell interest before continuous trading. Orders and information accumulated overnight can create an opening price materially different from the prior close. The auction is a price-discovery mechanism, not evidence that every order will trade at the previous level.
Continuous trading and the close
Once continuous trading begins, available prices reflect live order interest and liquidity. Closing auctions concentrate activity again as benchmarks, funds and institutions complete end-of-session business. Conditions around the open and close may therefore differ from quieter periods.
Why price gaps appear
A gap occurs when the next available transaction or reference price is separated from the last observable level. Earnings, guidance, takeovers, macro news, geopolitical events or a broad change in sentiment can cause repricing while the market is closed. A halt can also create a gap when trading resumes.
There is no requirement for the market to trade through every price in between. This matters for market orders, triggered stops and leveraged positions. How to Read Company Earnings and Guidance explains one common source of overnight repricing.
Stops and the next available price
A stop instruction generally becomes eligible when its trigger condition is reached. It does not reserve liquidity or guarantee a particular fill. If the market reopens beyond the stop level, execution may occur at a different available price. Slippage can be adverse, favourable or zero, depending on direction and liquidity.
Position size, margin headroom and event timing therefore remain important even when a stop is present. The Order Types and Execution Mechanics guide covers the difference between instructions, triggers and fills.
Trading halts and suspensions
Exchange halts
An exchange or listing venue may halt a security for pending news, order imbalances, volatility controls or regulatory reasons. Nasdaq publishes distinct halt codes because the cause affects what participants should expect. Reopening may involve an auction or indicative process rather than an immediate return to ordinary trading.
Regulatory suspensions
A regulator can suspend trading when it considers action necessary for investor protection or orderly markets. A suspension is not the same as a routine volatility pause and can last longer. Availability of a related CFD may also be restricted under provider terms and risk controls.
A session-risk checklist
- Confirm the underlying listing and official exchange time zone.
- Check the RG instrument schedule, including holiday changes.
- Identify earnings, corporate actions and scheduled announcements.
- Review whether a halt or auction is in effect.
- Allow for a different next available price.
- Check open orders, margin and position size before the close.
- Use official notices for reopening status.
Market structure provides a timetable, not a price guarantee. Stock CFDs remain leveraged derivatives, so gaps and interruptions can magnify losses relative to the margin supporting the position.