People yelling “CORRELATION IS NOT CAUSATION!” in all caps are technically right but practically not very helpful. There often is no causation, but there is a ton of information contained in the correlation between assets.
If corn doubles in price, those who can switch to soy will do so, pushing the price of soy futures higher. If Doordash rips higher and now looks overvalued, investors looking for food delivery apps to invest in might buy GrubHub instead.
When a Canadian crude oil producer sells their crude, they receive USD. They need CAD to pay their employees and shareholders so after they sell their crude, they need to sell USDCAD to convert the proceeds. If the price of crude doubles, the crude producer will have twice as many USD to sell and this will weigh on USDCAD.
Tagged: trading.