Ethylene shows two sides of the same coin Lewandowski Steve Lewandowski has a new spin on the famous bull-vs.-bear market when it comes to demand for ethylene. And the vice president of global olefins at IHS Markit is using Greek mythology to explain forces in play these days. Anyone who paid attention in 10th grade English remembers the Minotaur — half bull, half man. Well, Lewandowski believes another mythical creature of his own making is at play for ethylene. The Ursataur — half bear, half bull. "To say 2020 was an eventful year would be an understatement when you look at the ethylene market in the global markets," he said, citing the impacts of COVID-19.