Questex Gold & Copper Ltd. (CLASD: Pink Current) | Symbol Change Fri, Oct 02, 2020 12:00 - Questex Gold & Copper Ltd. ( CLASD : Pink Current) - Symbol Change - The symbol, CLASD, is no longer a valid symbol for Questex Gold & Copper Ltd.. As of Fri, Oct 02, 2020, the new trading symbol is CLASF. You may find a complete list of symbol changes at otcmarkets.com .