Tri Origin Exploration Ltd. (TROIF: Grey Market) | Symbol Change Thu, Aug 20, 2020 12:00 - Tri Origin Exploration Ltd. ( TROIF : Grey Market) - Symbol Change - The symbol, TROIF, is no longer a valid symbol for Tri Origin Exploration Ltd.. As of Thu, Aug 20, 2020, the new trading symbol is TROID. You may find a complete list of symbol changes at otcmarkets.com .