For which of the following is a cancellation application applicable if submitted within 30 minutes after a transaction?

The cancellation application being applicable when submitted within 30 minutes after a transaction is relevant to all parties involved in that transaction. This means that any participant—whether a trader or a party affected by the transaction—has the opportunity to submit a cancellation request. This policy exists to ensure that fairness and accuracy are maintained in the trading environment, enabling affected parties to address errors or issues they may encounter shortly after a trade is executed.

This broad eligibility for submitting a cancellation application represents a commitment to transparency and the collaborative nature of trading on the Eurex exchange. It ensures that all appropriate stakeholders have a means to contest or rectify trades that they believe are erroneous or unfair, regardless of who executed the transaction.

In contrast, the other options suggest limitations either on who can submit cancellations or on the types of transactions affected, which wouldn't align with the principles of transparency and fairness upheld in trading practices.