Many investors are simply unfazed by the current trade war erupting between the US and China (just look at share prices for evidence). However, even those who may be bullish on equities need to be worried for oil. While the increasing sanctions on Iran are supportive of prices, a trade war would likely be very bad. The reason why is that increasing tariffs would likely cause an economic downturn in emerging markets, which would then heavily sap oil demand, leading prices lower.
FINSUM: The oil and other commodity markets are demand-driven (and realistic) in a way that stocks aren’t. Watch them for where the economy is actually headed.