Summa Silver Corp. (SSVRF: Pink Current) | Venue Change Fri, Aug 14, 2020 12:00 - Summa Silver Corp. ( SSVRF : OTC Link) - Venue Change - The symbol, SSVRF, no longer trades on Grey Market. As of Fri, Aug 14, 2020, SSVRF trades on OTC Link. You may find a complete list of venue changes at otcmarkets.com .