Keep the instrument and session definitions separate
The commonly quoted DAX performance index includes dividend reinvestment; price-return and other variants also exist. FDAX is a futures contract and GER40 is often a broker label. Inspect the provider’s symbol specification instead of assuming all of them share one price, session or tradable volume.
| Market reference | Published schedule or distinction | What to verify |
|---|---|---|
| Xetra core cash trading | Monday–Friday, 09:00–17:30 German local time, subject to auction and calendar rules. | Use the actual auction/session definition for the chosen opening or closing price. |
| Extended Xetra Retail Service | Early trading 08:00–08:55 and late trading after the closing-auction/Trade-at-Close process until 22:00. | Participation and service rules differ from the core cash session. |
| Eurex DAX futures | 2026 calendar: 01:10–22:00 CET or 02:10–22:00 CEST, with expiry exceptions. | Contract month, holiday calendar and last-trading-day schedule. |
| US events and cash opening | Use the event’s published US local time and convert for the date. | US and European daylight-saving transitions do not always coincide. |