In a worrying development for coronavirus-hit financial markets, oil markets are now in crisis. The accord between OPEC (led by Saudi Arabia) and Russia has broken down with Russia not accepting OPEC's proposal for production cuts in the face of falling demand due to the coronavirus slowdown. The accord between OPEC and Russia has operated since 2016 when a bruising battle occurred to try and eliminate the marginal US shale oil producers.
Saudi Arabia is playing a game of Russian Roulette. With Russia having double-the-cost of production of Saudi Arabia's (at USD $9 a barrel) and double the sovereign wealth funds and foreign reserves of Russia, the economic pressure on Russia will be immense; currency pressure, government revenue pressure, political pressure. Just up from the production cost curve from Russia are the US shale oil producers (at USD $23 a barrel). The US shale oil producers carry significant corporate debt at the fringe and below investment grade level and are currently the largest oil producers behind Saudi Arabia and Russian. The US political environment is incredibly different to 2016, and the US oil industry's resurgent is a point of national political pride, a position which is unlikely to go unchecked by the Trump Administration.