Questão jurídica principal
Whether the arbitral tribunal violated the appellants' right to be heard by refusing evidence and by deciding on a legal theory not specifically addressed beforehand.
Decisão extraída
No violation was established; the tribunal addressed the evidence offers, and the appellants had to expect that the waiver of subscription rights could be legally relevant.
Fundamentação extraída
The tribunal could reject evidence by anticipated assessment where the offered facts were no longer decisive or the evidence was unsuitable. It also had no duty to warn the parties about a legal qualification tied to the disputed transaction, because the point was within the scope of the parties' debate.