Summa Silver Corp. (SSVRF: Pink Current) | Tier Change Fri, Aug 14, 2020 12:00 - Summa Silver Corp. ( SSVRF : Pink Current) - Tier Change - The symbol, SSVRF, no longer is classified as Grey Market. As of Fri, Aug 14, 2020, SSVRF resides in the Pink Current tier. You may find a complete list of tier changes at otcmarkets.com .