Many jurisdictions distinguish private (portfolio) investors from professional traders or businesses. Frequency, organization, leverage, short holding periods, and marketing activity can push you toward “business” treatment.
Consequences may include capital gains vs income rates, deductible expenses, VAT, social charges, and bookkeeping duties. Switzerland’s private-investor vs commercial trading distinction is a well-known example; other countries use analogous tests.
Why it matters: the same trades can be taxed under completely different regimes depending on classification.
Educational definition — not tax advice. Rules vary by country.
