Questão jurídica principal
Whether the participations and loan losses belonged to business assets and were deductible as business expenses/losses.
Decisão extraída
The participations were not business assets; the write-downs were correctly denied as private capital losses.
Fundamentação extraída
The assets had no relevant functional connection with the taxpayers' fiduciary business, produced only insignificant fees, were acquired from private funds, and were entered in the books only as an insufficient criterion.