Riverdale Oil & Gas Corp. (RVDO: Pink Current) | Tier Change Fri, Jun 26, 2020 12:00 - Riverdale Oil & Gas Corp. ( RVDO : Pink Current) - Tier Change - The symbol, RVDO, no longer is classified as Pink Limited. As of Fri, Jun 26, 2020, RVDO resides in the Pink Current tier. You may find a complete list of tier changes at otcmarkets.com .