Thu, Oct 10, 2013 12:00 - Petaquilla Minerals Ltd. (PTQMF: OTC Pink Limited) - Tier Change - The symbol, PTQMF, no longer is classified as OTCQB. As of Thu, Oct 10, 2013, PTQMF resides in the OTC Pink Limited tier. You may find a complete list of tier changes at otcmarkets.com.