RE:Share price is a yo-yo! I normally appreciate your candid realistic posts. However one major contributing factor, Espeically for heavy oil that is Fronterra. The price of oil since 2015 completly tanked just up until recently. Even was a point where it went negative. So doesn't make any sense to produce if your lifting costs are 3-5 times your return on the barrell.
They defintly weren't the only ones in the $hitr. Many did not survive.