Wisdomtree Commodity Sec Ltd. (ECTNF: Grey Market) | Deleted Symbol Fri, Aug 14, 2020 12:00 - Wisdomtree Commodity Sec Ltd. (ECTNF: Grey Market) - Deleted Symbol - As of Fri, Aug 14, 2020, ECTNF is no longer a valid symbol. You may find a complete list of deleted symbols at otcmarkets.com .