Heating oil futures are down 47%.
Natural gas futures are down 36%.
Copper futures are down 24%.
Unleaded gas is down 23%.
Soybean oil is down 15%.
Wheat futures are down 11%.
Corn futures are down 8%.
http://moneymorning.com/2015/01/21/deflation-in-2015-these-four-charts-say-yes/
https://reason.com/archives/2015/10/22/the-surprising-disappearance-of-inflatio
All those stats would reverse if Saudi Arabia slowed down their oil production.