'We don't think this is the end of it': Goldman Sachs' commodities expert explains why oil market chaos can continue into mid-May

· *Oil futures slid into negative territory for the first time ever on Monday, and Jeff Currie, global head of commodities research at Goldman Sachs, sees volatility staying strong until mid-May.*
· *Shutting a well down is expensive and can damage infrastructure, Currie told CNBC on Monday, delaying the supply cuts needed to...