Key legal question
Whether the settlement-based unwinding of the real estate sale had to be supplemented by analogy to Art. 109 OR, and if so whether only negative contractual interest was owed.
Extracted holding
The contract gap had to be filled so that the parties would, in good faith, have agreed to apply Art. 109(2) OR by analogy; only negative contractual interest was recoverable.
Extracted reasoning
The rescission created a contractual liquidation relationship comparable to a creditor's withdrawal under Art. 109 OR. The statutory wording and prevailing case law require damages for the loss caused by the contract falling away, i.e. negative interest. A claim for positive interest would contradict the clear text.